Tes Coat Epu

TES-COAT-EPU External Multi-Component Liquid Coating Systems for Below Ground Facilities (Cdn-US-Mex) Revision: 08

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Library: EDMS - General Page 1 of 35 Item ID: 003671710 Effective Date: 2011/Nov/23

TES-COAT-EPU External Multi-Component Liquid Coating Systems for Below Ground Facilities (Cdn-US-Mex)

Document Type: Specification

Effective Date: 2011/Nov/23 Revision: 08 Status: Issued

Classification Code: ME-09 Document Owner: Materials Engineering

Originator: Aissa Van Der Veen, P. Eng., Materials Engineering

______________________________________________

Signature/Date (signed copy on file) Discipline Checker: Robert Worthingham, P. Eng., Pipeline Integrity Program Management

______________________________________________

Signature/Date (signed copy on file)

Responsible Engineer: Aissa Van Der Veen, P. Eng., Materials Engineering

______________________________________________

Signature/Date (signed copy on file)

BRIEF DESCRIPTION OF CHANGE

Included requirements for coating of braces. Included requirements for the repair and holiday detection of abrasion resistant coatings. Revised the holiday detection requirements. Revised the qualification process for applicators. Distinguished between spray and brush grade coating application. Revised section 12.1.6.

amie_wongStamp




Table of Contents Page No.

BRIEF DESCRIPTION OF CHANGE..................................................................................................... 1 1 PURPOSE....................................................................................................................................... 4 2 SCOPE ............................................................................................................................................ 4 3 REFERENCES............................................................................................................................... 4 4 DEFINITIONS ............................................................................................................................... 6 5 SAFETY CONSIDERATIONS .................................................................................................... 6 6 REQUIREMENTS......................................................................................................................... 7

6.1 General................................................................................................................................ 7 6.2 Coating of Valves, Fittings and Pipe .................................................................................. 8 6.3 Coating of Girth Welds and Tie-In Welds .......................................................................... 9 6.4 Coating of Tie-Ins............................................................................................................... 9 6.5 Coating of Structural Steel................................................................................................ 10 6.6 Backfilling ........................................................................................................................ 10 6.7 Risers and Transition Areas .............................................................................................. 10 6.8 Steel Reinforcement Sleeves and Piping through Clamps, Braces and Supports ............. 10

7 SPRAY GRADE COATING APPLICATION.......................................................................... 11 7.1 General.............................................................................................................................. 11 7.2 Qualification ..................................................................................................................... 11 7.3 Coating Material ............................................................................................................... 11

8 BRUSH GRADE COATING APPLICATION ......................................................................... 12 8.1 Contractor Qualification for Brush Grade Coating Application ....................................... 12 8.2 Qualification of Company Personnel for Coating Application......................................... 13 8.3 Coating Material ............................................................................................................... 13

9 QUALIFICATION LABORATORY TESTING ...................................................................... 14 10 SURFACE PREPARATION ...................................................................................................... 15 11 COATING APPLICATION ....................................................................................................... 16

11.1 General.............................................................................................................................. 16 11.2 Preheating ......................................................................................................................... 16 11.3 Application........................................................................................................................ 17

12 INSPECTION............................................................................................................................... 18 13 COATING REPAIRS.................................................................................................................. 21

13.1 Repair Materials................................................................................................................ 21 13.2 Surface Preparation for Coating Repairs .......................................................................... 21 13.3 Preheating ......................................................................................................................... 21 13.4 Low DFT areas ................................................................................................................. 22 13.5 Overcoating Existing Coatings ......................................................................................... 22 13.6 Stripping of Defective Coating ......................................................................................... 22 13.7 Application of Repair Coatings ........................................................................................ 23

14 ADHESION AND CURE TESTS............................................................................................... 23 14.1 Adhesion Test Using X-cut............................................................................................... 23




14.2 Test Panels ........................................................................................................................ 23 14.3 Test Procedure .................................................................................................................. 24 14.4 Rating................................................................................................................................ 24 14.5 Cause for Rejection........................................................................................................... 24 14.6 Cure Test Using Shore D Hardness .................................................................................. 25

APPENDIX 1 MAINLINE RECOATING USING LINE TRAVEL EQUIPMENT MAINLINE RECOATING............................................................................................................................... 26

APPENDIX 2 TIE-IN PROCEDURE FOR ASPHALT, THIN FILM TAPE AND COATING THE EDGE TRANSITION OF CLAMPS, BRACES AND SUPPORTS............................... 29

APPENDIX 3 FIELD TESTING OF ABRASIVE BLASTING MEDIA.......................................... 31 APPENDIX 4 TESTING FOR SALT ON BLAST CLEANED SURFACES................................... 32 APPENDIX 5 ACCELERATED CURING OF REPAIR AREAS.................................................... 33 FIGURE 1 VISUAL COMPARATOR FOR 0.03% EMBEDDED ABRASIVES ........................... 35




1 PURPOSE

This Specification describes the requirements for the application and inspection of multi-component liquid coatings to be used for below ground corrosion control on:

Pipe, piping assemblies, valve assemblies, components and girth welds, horizontal directional drilling (HDD) girth welds

Compressor station and meter station piping Mainline, compressor station and meter station recoating projects Buried structural steel

2 SCOPE

This Specification applies to the application of multi-component liquid coatings to mainline pipe, valves, fittings and field integrity programs where pipeline service temperatures do not exceed 90C (194F), except where noted. This Specification applies to the application of all multi-component liquid coatings used for external corrosion protection of below ground gas and liquid pipeline systems. This Specification covers holiday detection and repairs to fusion bond epoxy (FBE) coating with multi-component liquids in the field.

This Specification applies to Canada, the United States and Mexico.

3 REFERENCES

The latest editions of these references shall be used.

a) SSPC Steel Structures Painting Manual Volume 2

b) SSPC VIS 1 Guide and Reference Photographs for Steel Surfaces Prepared by Dry Abrasive Blast Cleaning

c) SSPC Technology Guide 15 Field Methods for Retrieval and Analysis of Soluble Salts on Steel and Other Nonporous Substrates

d) SSPC-PA 3 Guide A Guide to Safety in Coating Application

e) Swedish Standards Institution (SIS) 055900 Pictorial Surface Preparation Standards for Painting Steel Surfaces

f) NACE Standards:

NACE No. 1/SSPC-SP-5 NACE No. 2/SSPC-SP-10 NACE No. 3/SSPC-SP-6 NACE No. 4/SSPC-SP-7 NACE SP0188 Discontinuity (Holiday) Testing of New Protective Coatings on

Conductive Substrates

NACE SP0490 Holiday Detection of Fusion-Bonded Epoxy External Pipeline Coatings of 250 to 760 m (10 to 30 mil)




g) ISO 8502 Preparation of Steel Substrates before Application of Paint and Related Products - Tests for the Assessment of Surface Cleanliness

Part 3: Assessment of Dust on Steel Surfaces Prepared for Painting (Pressure-Sensitive Tape Method)

Part 5: Measurement of chloride on steel surfaces prepared for painting (ion detection tube method)

h) Company Procedure TEP-COAT-TQ Technical Pre-Qualification of Industrial Coating Applicators (005404501)

i) Company Procedure TEP-COAT-SAL Salt Testing and Mitigation Procedure (005872123)

j) Company Form TEF-COAT-UG Below Ground Coating Report (003708480)

k) Company Specification TES-COAT-P1 Paint Systems for Above Ground Facilities (Non Coastal) (003694704)

l) Company Specification TES-COAT-P2 Paint Systems for Above Ground Facilities (Coastal) (005881132)

m) Company Specification TES-COAT-PET Coating Application Procedure for Petrolatum Coating (000007756)

n) Company Specification TES-COAT-HSS Heat Shrink Sleeve Installation Procedure (003735848)

o) Company Specification TES-COAT-ABR External Liquid Coating Systems for Abrasive Conditions (003764914)

p) TEP-COAT-QLF-PAR Application Qualification Process for Applicators Partech (006210056)

q) TEP-COAT-QLF-RAE Application Qualification Process for Applicators RAE Engineering (004122292)

r) TEP-COAT-QLF-CTR Application Qualification Process for Applicators Charter Coating Service (006551441)




4 DEFINITIONS

Term Definition of Term Applicator The company which is applying the coating. Typically this is either

the Contractor or their Sub-contractor. Cohesive Failure The separation of the homogeneous coating. Coating left on the

steel substrate and coating forced off during evaluation. Company TransCanada PipeLines Limited, including its affiliates,

engineering agencies, inspectors and other authorized representatives.

Contractor Those who have been contracted to prepare the surface and apply the coatings covered in this Specification.

DFT Dry film thickness, the thickness of the coating after it has hardened to a solid state, as defined in SSPC PA2.

Epoxy A two-component liquid epoxy or epoxy/urethane coating system. Manufacturer Those who manufacture and supply the multi-component liquid

coating. Multi-Component Liquid Coating (MCL)

A coating material, consisting of two or more parts in a fluid state, that when mixed together and applied to the substrate hardens to form a solid coating. Usually formulated from epoxy or urethane resins. Also referred to as two-component liquid epoxy or two-part epoxy coating.

Nominal Thickness The target thickness expected for the coating.

Service Temperature The maximum operating temperature that the coating will see during its lifecycle

Sweating/Damp Pipe (Substrate)

Any substrate to be coated or blasted is considered to be sweating or damp if its temperature is less than 3 Celsius degrees (3C) (5 Fahrenheit degrees (5F)) above the dew point of the air immediately adjacent to the surface.

System 1A Single layer fusion bond epoxy (FBE) corrosion coating. System 2B Two layer fusion bond epoxy (FBE) coating with a corrosion

coating (System 1A) and an abrasion resistant overcoat. WFT Wet film thickness, the thickness of the coating film while in the

liquid state.

5 SAFETY CONSIDERATIONS

5.1.1 The Contractor shall maintain copies of Material Safety Data Sheets (MSDS) for all controlled products and shall ensure his employees (sub-contractors or agents) are familiar with the precautions of the MSDS regarding hazards, necessary personal protective equipment, first-aid measures, and are trained in the handling and use of these products.




5.1.2 Work gloves and safety glasses shall be worn when handling multi-component liquid coating. Exposed skin can be protected by applying a barrier cream. Any coating which does contact the skin should be removed immediately using a waterless hand cleaner and in accordance with the manufactures recommendations. Any activator may be removed using soap and water. Ample supplies shall be made available by the Contractor for this purpose.

5.1.3 Protection from inhalation is required. These products should only be used in well ventilated areas and personnel should wear the appropriate respiratory protection.

5.1.4 During coating application, no open flames, smoking, grinding or welding shall be allowed in the immediate vicinity.

5.1.5 Under no circumstances shall the multi-component liquid coating be removed by heating with an open flame.

5.1.6 To prevent contamination of the contents, coating containers shall not be left open, and only authorized persons shall handle the product.

5.1.7 Personal protective equipment (PPE) shall be used while abrasive blasting. This shall include proper clothing, hearing protection, safety boots, gloves and ventilated blast hood (or face shield with respirator) to protect the face and prevent inhalation of blasting dust. Blast hood or respirators shall be fed with air that is pressure regulated, filtered and meets regulatory requirements.

5.1.8 Blast cleaning equipment shall be fitted with a functional dead man remote control system. All mechanical equipment, including blasting equipment, shall be earthed and all precautions taken to prevent build up of static electricity. Blast hose couplings shall be secured with safety wire and chokers.

6 REQUIREMENTS

6.1 General

6.1.1 All new below ground gas and liquid pipelines or rehabilitation projects and/or repairs shall be protected against corrosion with an appropriate coating. The multi-component liquid coating applied in accordance with this Specification and the manufacturer's specification satisfies the above requirement.

6.1.2 The Contractor shall furnish all materials, labour, equipment, tools, instruments, and supervision, incidental to and necessary for the removal of old existing coatings, if any, and the application and inspection of the external coating in accordance with this Specification. All quality control measurements and inspections shall be carried out and recorded by the Contractor or Company personnel on Company Form TEF-COAT-UG. The Applicator will keep a copy of the Technical Data Sheet for each coating used and follow all recommendations from the manufacturer. The Company shall have the right to review the Applicators work and records at any time.

6.1.3 The Contractor shall be responsible for complying with all of the requirements of this Specification.




6.1.4 All below ground metallic components, including piping, valves, braces, supports, etc., with the exception of those used for grounding, shall be coated according to this Specification and shall be handled in such a manner so as to prevent them from being damaged. The coating of Mueller tees, flanges and odd shaped items with a service temperature of less than 50C (122F) shall be completed in accordance with TES-COAT-PET.

6.1.5 Prior to commencing surface preparation operations, the surface must be examined for the presence of any deleterious materials, such as heavy corrosion or rust scale, existing elastomeric, or rubber-like old coatings, or previously applied tape protective systems that will require removal. If any such materials are present that cannot readily be removed by the blast cleaning process, it will be necessary to conduct a pre-blast cleaning surface preparation. The pre-blasting surface preparation may use any Company approved processes, such as solvent cleaning, use of hand or power tools, water blast cleaning or hydro-jetting, or other removal methods that will accomplish removal of the deleterious material prior to blast cleaning. After removal, the surface should again be inspected to ensure that any deleterious material remaining may be readily removed during the subsequent blast cleaning operations.

6.1.6 The Applicator shall ensure coating material is:

a) An approved material per this Specification.

b) Identified with the following:

manufactures name; product description; batch number; date of manufacture; location of manufacture; and manufacturing identification number

c) Handled and stored in accordance with the manufacturers recommendations at all times.

d) Within the shelf life recommended by the manufacturer.

6.2 Coating of Valves, Fittings and Pipe

6.2.1 The coating material for valves, fittings and pipe shall be spray grade multi-component liquid coating. Brush grade may be used on difficult areas, on short sections of pipe (less than 2 linear metres (6.5 linear feet)), for repairs, for tie-ins, and for sweating pipe.

6.2.2 The crotch area; including the outlet portion; of all tees with a nominal run diameter greater than NPS 16 and run diameter to outlet diameter ratio in excess of 0.6 shall not be coated until after secondary hydrostatic testing has been completed to avoid cracking of the coating.

6.2.3 Valves shall be coated in an enclosure or indoors with no direct heat applied to the valve assembly. The minimum surface temperature of 10C (50F) shall be maintained until 4 hours after the coating is tack free.

6.2.4 Valves may not be post heated except by increasing ambient air temperature.




6.2.5 Valves, fittings or pipe that is to extend above ground shall be coated to approximately 45 cm (18 in) above the grade level.

6.3 Coating of Girth Welds and Tie-In Welds

6.3.1 Coating material for girth welds and tie-in welds shall be brush grade and shall be applied according to Section 9 of this Specification. The use of spray grade coating material for girth welds and tie-in welds may be permitted as per Section 8 of this Specification, but must be approved by the Company prior to use.

6.4 Coating of Tie-Ins

6.4.1 The following coatings and Specifications shall be used when tying in multi-component liquid coating with existing coatings for new construction or tie-ins for non-flowing pipelines:

Existing Coating Tie-in Coating Specification

Multi-component Liquid Coatings Multi-component Liquid Coatings TES-COAT-EPU

Fusion Bond Epoxy Multi-component Liquid Coatings TES-COAT-EPU Extruded Polyethylene Shrink Sleeves TES-COAT-HSS

Coal Tar, Asphalt, Tape Petrolatum Coating and Fibreglass Outer Wrap or Mouldable Sealant with Bonded Polyethylene Outer Wrap

TES-COAT-EPU (Appendix 2)

6.4.2 The following coatings and Specifications shall be used when tying in multi-component liquid

coatings with existing coatings on flowing pipelines:

Existing Coating Tie-in Coating Specification Multi-component Liquid Coatings Multi-component Liquid Coatings TES-COAT-EPU

Fusion Bond Epoxy Multi-component Liquid Coatings TES-COAT-EPU

Extruded Polyethylene Petrolatum Coating and Fibreglass Outer Wrap or Mouldable Sealant with Bonded Polyethylene Outer Wrap


Coal Tar, Asphalt, Tape Petrolatum Coating and Fibreglass Outer Wrap or Mouldable Sealant with Bonded Polyethylene Outer Wrap


6.4.3 Multi-component liquid coating material for tie-ins shall be brush grade and shall be applied according to Section 9 of this Specification.

6.4.4 Any disbonded coating or tape shall be removed until well adhered coating is found.

6.4.5 The recoating should take place in accordance with the following requirements:

a) Any damaged FBE/Coal Tar/Asphalt/Tape coated area shall be completely removed by scraping and/or grit blasting.




b) The existing FBE/multi-component liquid coating shall be either sweep-blasted or roughened by cross-hatch sanding with 60 - 80 grit sandpaper for a distance of 4 - 10 cm (2 - 4 in) to ensure intercoat adhesion. The existing coating shall then be wiped with a clean, dry rag to remove any dust or residual blast products. The multi-component liquid coating shall be coated up to and onto the existing coating according to this Specification.

c) For tying into Coal Tar/Asphalt/Tape/External Polyethylene coatings, a clean edge shall be prepared and the new coating shall abut that clean edge. Refer to Appendix 2 for additional requirements to ensure the integrity of the transition edge.

6.5 Coating of Structural Steel

6.5.1 The coating material for structural steel to be buried, such as below ground pipe supports, shall be spray or brush grade and shall be applied according to Section 8 or 9 of this Specification. Piles do not require coating. Holiday testing of structural steel is not required.

6.6 Backfilling

6.6.1 Mechanical stress, including backfill, shall not be applied to the coating until it has reached the degree of cure as specified in Section 15.6.

6.7 Risers and Transition Areas

6.7.1 Pipe risers and transition areas shall be coated with spray or brush grade multi-component liquid coating and shall be applied in accordance with Section 8 or 9 of this Specification. The coating system shall extend approximately 45 cm (18 in) above the grade level.

6.7.2 The top coat of the above ground coating must continue approximately 45 cm (18 in) below grade and be applied in accordance with Company Specification TES-COAT-P1.

6.8 Steel Reinforcement Sleeves and Piping through Clamps, Braces and Supports

6.8.1 When coated pipe passes through a clamp, brace, support, etc., an outer wrap of petrolatum and fibreglass outer wrap shall be applied as per Appendix 2 of this Specification. Steel reinforcement sleeves shall be coated with spray or brush grade multi-component liquid coating and shall be applied in accordance with Section 8 or 9 of this Specification and the end transitions to line pipe shall be overcoated according to Appendix 2.




7 SPRAY GRADE COATING APPLICATION

7.1 General

7.1.1 The Contractor shall provide at least one NACE certified CIP Level I or Company approved alternatively trained employee. This employee need not necessarily perform inspection but may be the painter, foreman or management. They shall have an excellent knowledge of the application procedures generally used for high performance coatings. They should know the characteristics of plural component airless spray, and shall be familiar with the procedures used to apply coatings properly with such equipment.

7.2 Qualification

7.2.1 The Applicator shall have current one of the following certifications:

a) The Society for Protective Coatings (SSPC) QP1 or QP3 as applicable; or

b) ISO 9001 Quality Management Standard.

7.2.2 In the absence of the above programs, the Applicator shall submit for acceptance a quality program or inspection and test plan (ITP) for the supply and application of coatings to the Company.

7.2.3 The Applicator shall use coating personnel that have been pre-qualified by the manufacturer. Re-qualification of personnel by the manufacturer shall be once every year. Only those Contractors or sub-contractors who hold current approval by the Company shall spray apply multi-component liquid coating systems covered by this Specification. Approval of Applicators by the Company shall be as per Company Procedure TEP-COAT-TQ. It is the Contractors responsibility to ensure that all employees or sub-contractors are manufacturer qualified and Company approved before bidding on Company work.

7.2.4 The Applicator must submit test panels of the multi-component liquid coating to be applied (i.e. SPC 2888). These panels must pass testing before the Applicator may apply the coating. Refer to Section 10 for the panel requirements and tests to be conducted. Only one set of test panels are required, even if the Applicator has several spray units. If the Applicator has any rented equipment, individual test panels from each unit must be submitted and qualification shall only be granted for the duration of the rental.

7.3 Coating Material

7.3.1 General Application

7.3.1.1 The Company approved spray applied multi-component liquid coatings to be used shall be: Denso North America Denso Protal 7250 (Canada) / Denso Protal 7200 (U.S.) 3M Scotchkote 327 Specialty Polymer Coating SP-2888RG Epoxy/Urethane Specialty Polymer Coating SP-3888 Epoxy Specialty Polymer Coating SP-6888 Epoxy Specialty Polymer Coating SP-7888 Epoxy




7.3.1.2 The materials listed in Section 8.3.1.1 can be used for new construction and maintenance activities for pipe and associated structures where a substrate temperature above 10C (50F) and 3C (5F) above the dew point can be maintained. This warm and dry condition may be achieved and maintained by pre-heating as per Section 12.2. No alternative materials are acceptable.

7.3.2 Low Temperature Application

7.3.2.1 The Company approved spray applied multi-component liquid coatings to be used shall be:

3M Scotchkote 352 applied from -9C (15F) to 10C (50F) and has a maximum service temperature of 35C (95F). The minimum and maximum DFT is 1,016 1,270 m (40 50 mils) and the nominal thickness is 1,067 m (42 mils).

7.3.2.2 The materials listed in Section 8.3.2.1 can be used for maintenance activities only and where the substrate temperature cannot be raised above 10C (50F) but the substrate is >3C (5F) above the dew point temperature.

8 BRUSH GRADE COATING APPLICATION

8.1 Contractor Qualification for Brush Grade Coating Application

8.1.1 The Contractor shall use coating personnel that have been pre-qualified by the Manufacturer. It is the Contractors responsibility to ensure that employees or sub-contractors are manufacturer qualified before bidding on Company work. Re-qualification of personnel shall be once per 12 month period.

8.1.2 The Contractor shall provide at least one NACE certified CIP Level I or Company approved alternatively trained employee. This employee need not necessarily perform inspection but may be the painter, foreman or management. They shall have an excellent knowledge of the application procedures generally used for high performance coatings. They shall be familiar with the procedures used to apply coatings properly by hand.

8.1.3 Training in the application of coating material in accordance with this Specification can be provided by the Company and is recommended. The Company may complete random site audits or visits and review coating inspection reports during the coating application process.

8.1.4 For each project, the Contractor must submit test panels of the material to be applied (e.g. SPC 2888). These panels must pass testing before the Contractor may apply the coating. For major projects, if the Contractor has a number of coating spreads, a test sample from each spread must be submitted for testing. If there are time constraints, the panels may be submitted from the first day of production; however, should the panels fail testing, remedial action, such as, stripping and recoating and/or destructive testing may be required. Refer to Section 10 for the panel requirements and tests to be conducted.

8.1.5 If the Contractor has submitted panels for a previous project and/or has worked on any Company project, within the last 12 month period, with no issues, additional testing is not required as long as the coating manufacturers certification is valid and the Contractor uses the same coating and abrasive materials that were used for qualification. In this case, re-qualification of the personnel shall be once per 24 month period.

8.1.6 The Contractor shall submit for acceptance a quality program or inspection and test plan (ITP) for the supply and application of coatings to this Specification.




8.2 Qualification of Company Personnel for Coating Application

8.2.1 In certain instances, such as pipe integrity digs, out of class engineering digs, repair and maintenance work, etc., brush application by Company personnel may be required. All Company personnel that apply coating material must be pre-qualified by the coating manufacturer. Only those Company personnel who hold current certifications from the manufacturer shall brush apply multi-component liquid coating systems covered by this Specification. In addition to the manufacturers training, all quality control measurements and inspections shall be carried out and recorded on Company Form TEF-COAT-UG. A NACE certified CIP Level I or Company approved alternatively trained employee is recommended to witness the coating application. Re-qualification of Company personnel once every calendar year is not required if the Company employee has applied coating material since qualification by the manufacturer. All Company personnel holding current manufacturer certifications will be expected to complete a manufacturers training session every 3 years.

8.3 Coating Material

8.3.1 General Application

8.3.1.1 The Company approved brush applied multi-component liquid coatings to be used shall be:

Denso North America Denso Protal 7200 3M Scotchkote 327 Specialty Polymer Coating SP-2888RG Epoxy/Urethane Specialty Polymer Coating SP-3888 Epoxy Specialty Polymer Coating SP-6888 Epoxy

8.3.1.2 The materials listed in Section 9.3.1.1 can be used for new construction and maintenance activities for pipe and associated structures where a substrate temperature above 10C (50F) and 3C (5F) above the dew point can be maintained. This warm and dry condition may be achieved and maintained by pre-heating as per Section 12.2. No alternative materials are acceptable.

8.3.2 Low Temperature Application


3M Scotchkote 352 applied from -9C (15F) to 10C (50F) for a maximum service temperature of 35C (95F). The minimum and maximum DFT is 1,016 1,270 m (40 50 mils) and the nominal thickness is 1,067 m (42 mils).

Denso 7125 applied from -20C (-4F) to 10C (50F) for a maximum service temperature of 35C (95F). The minimum and maximum DFT is 760 - 1,016 m (30 - 40 mils) and the nominal thickness is 813 m (32 mils).

8.3.2.2 The materials listed in Section 9.3.2.1 can be used for maintenance activities only (where the pipe is flowing) and where the substrate temperature cannot be raised above 10C (50F) but the substrate is >3C (5F) above the dew point temperature.

8.3.3 Sweating Pipe Application





Specialty Polymer Coating SP-4888 for a maximum service temperature of 65C (150F). 8.3.3.2 The materials listed on Section 9.3.3.3.1 can be used for maintenance activities only and where a

coating repair must be made on pipe that is flowing and, as a result, is sweating (i.e. the pipe temperature is




10 SURFACE PREPARATION

10.1.1 Surfaces to be blast cleaned shall be free of oil, grease, injurious contamination, slivers, mud, soils, rough welds, burrs, weld spatter, etc. Prior to blast cleaning, the Contractor shall carefully examine the bare pipe for oil and grease. Any oil, grease or magnetic particle inspection products or ultrasonic couplant shall be removed in accordance with SSPC-SP-1 using acetone, xylene or MEK and the pipe shall be heated to remove any moisture. The pipes surface temperature shall be at least 3C (5F) above the dew point temperature from blast cleaning until the coating is cured, but shall not exceed 150C (302F). For X80, X100 or strain based design pipe (SBD), the pre-heat temperature is lower. Please contact the Company for the maximum pre-heat temperature for X80, X100 or SBD pipe.

10.1.2 The edge of weld bevels and internal surfaces shall be protected during blast cleaning and coating application. The blast media and coating material shall be prevented from entering the valves, fittings and pipe. No amount of blast media in a valve, fitting or pipe shall be acceptable.

10.1.3 Edges of the existing coating shall be roughened by power sanding or by sweep blasting the coating for a minimum distance of 5 cm (2 in). All roughened coating shall be coated.

10.1.4 The exterior metal surface shall be abrasive blast-cleaned to a near white finish SSPC-SP-10 (NACE # 2 or Sa 2 per ISO 8501-1:2007 = SIS 055900) or better.

10.1.5 Material for abrasive cleaning shall be the appropriate blend of grit to produce an angular surface profile of 64m (2.5 mils) minimum to 114m (4.5 mils) maximum. Target Green Diamond, Target Black Magic, Starblast XL, Black Beauty, Barshot, Black Lightning or a Company approved equivalent shall be used. Copper bearing abrasives shall not be used. The abrasive shall be tested for soluble salts and oil contamination per Appendix 3 at the start of each shift.

10.1.6 The Contractor shall have available on site colour prints of Swedish Pictorial Surface Preparation Standard Sa 2 or the SSPC-VIS 1 Visual Standard for Abrasive Blast Cleaned Steel.

10.1.7 For girth welds, the surface profile of the blast cleaned girth weld area shall be measured on the first weld and on at least every tenth weld using replica tape and a spring micrometer. For tie-in welds, the surface profile of the blast cleaned area shall be measured on every tie-in weld. The profile depth for girth welds and tie-in welds shall be 64m (2.5 mils) minimum to 114m (4.5 mils) maximum.

10.1.8 Metal areas that develop flash rust due to exposure to rain, moisture or humidity shall be given a sweep blast to return them to their original clean blasted condition. The surface to be blasted shall be recoated immediately. A sweep blast shall be carried out when a blasted surface is left overnight.

10.1.9 The compressed air supply used for blast cleaning shall be free of water and oil. Separators and filters shall be used on the compressed air supply to ensure that contaminants such as oil and water are not deposited on the steel surface. After cooler dryers are recommended and may be required at the Companys discretion. A blotter test shall be performed at the start of every working day to verify the cleanliness of compressed air used for abrasive blasting or conventional spraying.




10.1.10 Residual blast products shall be removed from all blasted surfaces using a clean dry bristle brush; vacuum or clean dry compressed air. Embedded abrasive level shall not exceed 0.03% of the surface area. It shall be verified using Figure 1 Visual Comparator for 0.03% Embedded Abrasives.

10.1.11 Tests, as described in Section 13.1.18, shall be conducted by the Contractor to verify that the surface does not contain detrimental levels of non-visible soluble salt contamination. If salt contamination levels exceed the acceptance limits the salt shall be removed.

11 COATING APPLICATION

11.1 General

11.1.1 Surfaces to be coated shall be prepared in accordance with Section 11 and shall be free of moisture, oil and grease and any other deleterious contaminants prior to the application of the coating.

11.2 Preheating

11.2.1 Preheating is to be used in conjunction with Sections 8.3.1 and 9.3.1 to provide a suitable temperature for abrasive blasting, coating and curing. Preheating does not apply for Sections 8.3.2, 9.3.2 or 9.3.3, application of low temperature curing or moisture tolerant coatings; where a line is flowing.

11.2.2 The surface temperature of the substrate must be maintained in the range recommended in this Specification from abrasive blasting through coating cure. If that range will not be available from ambient conditions, preheating shall be used. Preheating may also be used to accelerate cure when there are time or weather constraints. Any preheating or accelerated curing other than what is outlined in this Section must be approved by the Company.

11.2.3 The pipe surface temperature, at every point where coating will be applied, shall not be less than 10C (50F). The pipe surface temperature must be a minimum of 3C (5F) above the dew point temperature from abrasive blasting through coating cure. Caution should be used in sub-zero temperatures to ensure that all snow and ice have been removed from the substrate prior to blasting. This is typically accomplished through the use of a direct flame prior to abrasive blasting. The dew point and pipe surface temperature shall be determined at the start of daily coating application and at least once every four hours during coating. The dew point shall be determined by the Contractor and/or the coating inspector using a sling psychrometer and psychrometric charts or Company approved suitably calibrated electronic hygrometer (digital psychrometer /dew point meter).

11.2.4 For girth weld coating, if the pipe surface temperature is below 10C (50F), the surface shall be preheated. Induction heating coils, infrared or indirect heat shall be used to preheat the surface prior to coating. Preheating shall raise the surface temperature so that coating application takes place when the pipe surface is at or above the minimum temperature as specified in this Section. Direct flame may not be applied to the pipe after blast cleaning. If heating is required after blast cleaning and up until a full cure is achieved, to either maintain the surface above 10C (50F) or accelerate cure, induction heating coils, infrared or indirect heat may be used.




11.2.5 For tie-in weld coating, if the pipe surface temperature is below 10C (50F), the surface shall be preheated prior to coating. Induction heating coils, infrared or indirect heat shall be used to preheat the surface prior to coating. However, should the use of induction heating coils, infrared or indirect heat be deemed unfeasible by the Company Representative, preheating may be accomplished using a direct flame. The direct flame shall not contaminate the pipe surface. All propane tanks shall be vapour type with a Company approved in line filter, such as a Balston 200 series compressed air and Balston sterile air filter Model #C2002N-1B1-DX, Element #100-12DXE, Capacity 0.6L manufactured by Parker Hannifin, distributed by Drexan Corporation, Edmonton, AB. The in line filters shall be blown down at noon and at the end of each shift to ensure the filters do not freeze. The surface shall be prepared in accordance with Section 11. Preheating shall raise the surface temperature so that coating application takes place when the pipe surface is at or above the minimum temperature as specified in this Section. Where direct flame is applied, the surface shall be subsequently abrasive blast cleaned according to Section 11.

11.2.6 The pipe surface temperature shall be measured by the Contractor using a surface contact thermometer, or other device approved by the Company. Tempil sticks shall not be used. An infrared (IR) thermometer may be used if the surface has not been blast cleaned.

11.2.7 To ensure cure, the preheat temperature for the coating application shall be as per the manufacturers recommendations.

11.2.8 Preheating shall not damage the mainline coating or the coating being repaired, or raise the temperature of the pipe above 150C (302F).

11.3 Application

11.3.1 The coating shall be applied immediately after preheating has been completed. No solvents are to be added to the multi-component liquid coating system. The acceptable substrate temperature range for coating application is 10C (50F) to 100C (212F). The substrate temperature must be a minimum of 3C (5F) above the dew point temperature before proceeding with the coating application.

11.3.2 Brush Grade: The coating is a two component system (activator and base) and shall be mixed and applied in accordance with the manufacturers recommended practice.

11.3.3 Spray Grade: The coating shall be airless spray applied in a multi-pass to build to the required thickness using a Hydra-Cat (or Company approved equal) and all necessary ancillary equipment in accordance with the manufacturers recommended practice.

11.3.4 When coating corroded steel, brushes shall be used to work spray applied coating material into corrosion crevices and pits.

11.3.5 During the coating application, the wet film thickness (WFT) of the applied coating is to be measured by the Contractor using a wet film gauge and shall be brushed out. Wet film measurements are to be made on every joint, elbow, tee etc. being coated. If low areas are detected, additional coating shall be applied before tack-free condition occurs.

11.3.6 The coating shall overlap existing coating by a minimum distance of 5 cm (2 in). Feathered and roughened areas of existing coating shall be completely covered by the overlap.

11.3.7 The finished coating shall be generally smooth and free of application defects such as, pinholes, fish eyes, sags, etc.




11.3.8 After the coating has cured to a tack-free condition, the Contractor shall measure the DFT of each valve, fitting and pipe section, etc. at random in a minimum of five areas (see Section 13.1.5).

11.3.9 The DFT of cured coating shall fall in the range of: 508 889m (20 35 mils) with a nominal thickness of 559 m (22 mils) or as listed in Sections 8.3.2.1 and 9.3.2.1. For difficult sections (flanges, crotch areas of tees, weld caps, weld bead, etc.) a maximum DFT of 1,270 m (50 mils) will be allowed. Overcoating of pinhole and holiday repairs shall not exceed a total DFT of 1,270 m (50 mils) for a 152 mm (6 in) radius around the holiday. All DFT measurements shall be witnessed by the inspector or his designated representative.

11.3.10 When coating girth welds and tie-in welds intended for abrasion resistant service the DFT shall not be less than a minimum of 1,016 m (40 mils) and shall not exceed a maximum of 1,778 m (70 mils). Pipe intended for this service cannot be cold bent in the field more than 1 per pipe diameter due to the higher DFT, but can be used in horizontal directional drills, road bores, etc. For pipe bends greater than 1 per pipe diameter, approval from the Company must be granted prior to bending.

11.3.11 Neither handling nor backfilling shall be permitted until the coating has cured, as determined by the Inspector. Cure may be accelerated by post heating. Post heating may only be performed by an indirect method (induction, ambient temperature or infrared). Direct flame may only be used for tie-in welds, but care should be taken to ensure the coating is not charred or burned. The flame may not touch the coating and a constant sweeping motion shall be used. The post heat temperature of the coating surface should not exceed 65C (149F) as measured by infrared non-contact pyrometer.

12 INSPECTION

12.1.1 The Applicators inspector shall be on site during the surface preparation and coating application.

12.1.2 All quality control measurements and inspections shall be carried out and recorded by the Contractor or Company personnel on Company Form TEF-COAT-UG or a Company approved equivalent.

12.1.3 All aspects of surface preparation shall be checked as detailed in Section 11.

12.1.4 The finished coating shall be generally smooth and free of application defects such as pinholes, fish eyes, sags, etc. and holidays. Finished coated surfaces shall have the required minimum dry film thickness as per Section 12.3.9 or 12.3.10. In general, the surface of the coating shall be no rougher than the base or substrate material. Excessive drips, running, sagging or other discontinuities shall be cause for rejection.

12.1.5 The DFT shall be measured with a Microtest, Elcometer 345 or Positector 6000 thickness gauge or Company approved equal. The gauge shall be calibrated at least once per shift to a National Bureau of Standards (NIST) Certified Coating Thickness Standard, or gauge manufacturer supplied shims, that measure within 20% of the minimum required DFT.




DFT Measurements Required Object Size Minimum Number of Readings

Pipe Every 20 linear metres (65 feet) Five (5) randomly spaced along and around the pipe

Fittings Each, less than 20 linear metres (65 feet) Five (5) randomly spaced along and around the fitting

Pipe Sections Each, less than 20 linear metres (65 feet) Five (5) randomly spaced along and around the pipe section

Girth Welds and Tie-In Welds Each Five (5) randomly spaced along and around the girth weld or tie-in weld

Valves Each Five (5) randomly spaced along and around the valve

12.1.6 The following criteria shall be used when DFT readings are outside of the range specified in Section 10.3.9:

a) If 1 out of 5 of the DFT readings is outside of the range specified, further testing is to be performed. The Company, at their discretion, may have their coating inspector mark with a felt pen a 30 cm x 30 cm (12 in x 12 in) area of their choice on the pipe. The inspector will take twenty (20) random DFT measurements within the marked area. No individual reading shall be less than 80% of the minimum. If 10% of the readings are outside of the range specified, the coating on the entire section of coated pipe, valve, flange, brace, support, etc. shall be removed and recoated.

b) If the coating thickness is below the specified DFT any additional coating may only be applied within the manufacturers recoat window. Deviations from this may only be allowed with the written acceptance of the Company.

c) If the coating thickness is greater than the specified DFT, the coating shall not be abraded to reduce the thickness to reach the specified thickness; the coating shall be removed and recoated.

12.1.7 For difficult areas, as mentioned in Section 12.3.9, and for coating repairs of 152 mm (6 inch) or less in radius for holidays and pinholes, a maximum dry film thickness of 1,270 m (50 mils) will be allowed. Any coating applied in these areas with a DFT between 508 1,270 m (20 50 mils) is acceptable. Note that when the DFT is greater than 1,270 m (50 mils), the coating shall not be abraded to reduce the thickness to reach the specified thickness, the coating shall be removed and recoated.

12.1.8 For girth welds and tie-in welds, the coating shall be checked with a holiday detector set at least 4 V/m (100 V/mil) of the minimum coating thickness of 508 m (20 mils). This equates to a voltage setting of 2,032 V minimum for girth welds and tie-in welds and shall not exceed 5,000 V.




12.1.9 For abrasion resistant service (refer to Section 12.3.10) and low application temperature (refer to Section 8.3.2 or 9.3.2), each girth weld and tie-in weld shall be tested for coating integrity using a holiday detector set at least 4 V/m (100 V/mil) of the minimum coating thickness of 1,016 m (40 mils). This equates to a holiday detector operating at 4,064 V DC minimum and shall not exceed 5,000 V DC. Note that there is one exception for the low temperature application. If the Denso 7125 material is to be used, each girth weld and tie-in weld shall be tested for coating integrity using a holiday detector operating a 3,040 V DC minimum and shall not exceed 5,000 V.

12.1.10 For all other applications, such as the existing fusion bond epoxy (FBE) mainline coating and/or shop applied multi-component liquid coating, the coating shall be checked with a holiday detector set at least 5 V/m (125 volts/mil) of the nominal DFT and shall not exceed 5,000 V DC. For example, the holiday detection of existing FBE (System 1A) corrosion coating, the holiday detector shall be operating at 2,030 V minim which is based on 5 V/m (125 V/mil) and a nominal coating thickness of 406 m (16 mils) and shall not exceed 5,000 V. For FBE corrosion coating and FBE abrasion coating (System 2B), the holiday detection voltage to be used shall be 4,320 V minimum and shall not exceed 5,000 V.

12.1.11 Any repairs completed in Section 14 must be followed up with holiday inspection. Based on the repairs completed, the holiday detection will be as specified in Section 13.1.8, 13.1.9 or 13.1.10.

12.1.12 Holiday detection shall be carried out in accordance with NACE SP0490, but voltages shall be set as described in this Specification. A spring encirclement or half moon type holiday detector shall be used for pipe. A brass brush shall be used to reach the bottom of corrosion pits. Holiday detectors shall be calibrated at the start of the working day and at least every four (4) hours or as specified by the Company. Calibration certifications for the holiday detection equipment should be kept with the equipment. At the discretion of the Company the applicator shall make an intentional holiday in the coating to bare steel and verify that the holiday is detected at the appropriate voltage for the coating application. If the voltage is not adequate, the Applicator shall increase the voltage until the intentional holiday is detected, but the voltage may not exceed 5,000V. The voltage shall be measured using a suitable voltmeter, connected between the search electrode (spring) and the steel pipe.

12.1.13 The coating surface shall be dry and free of deposits such as soil, ice or snow when holiday testing is conducted. Dirt or marks on the coating surface, having no measurable thickness, are allowed when holiday testing.

12.1.14 A low voltage (60 - 70 V) wet sponge holiday detector may be used on nuts and bolts and areas difficult to access. Care should be taken not to damage adjacent coating with a lower DFT.

12.1.15 Inspection with a holiday detector shall not be attempted until the coating is hard dry (hard dry as determined when the coating does not indent when pressed with a thumbnail).

12.1.16 Coating shall be tested for adhesion and cure as per Section 15.

12.1.17 The abrasive shall be tested for soluble salts and oil contamination, per Appendix 3, at the start of each shift.

12.1.18 Testing shall be conducted to verify that blast cleaned surfaces do not contain detrimental levels of soluble salt contamination. Testing shall be done in accordance with the methods outlined in Appendix 4.




13 COATING REPAIRS

13.1 Repair Materials

13.1.1 Defects in multi-component liquid coatings shall be repaired with multi-component liquid coating materials as specified in Section 8.3 or 9.3. In general, the material used for repairs shall be the same material as the parent coating that is being repaired. Where applicable, a brush grade material may be used to repair a spray grade parent coating.

13.1.2 Fusion bond epoxy corrosion coating (System 1A) and FBE corrosion coating and FBE abrasion coating (System 2B) shall be repaired with a suitable multi-component liquid material selected from the materials listed in Section 8.3 or 9.3. The System 1A and 2B coatings shall be visually examined in the field and any damage found, such as scratches, scrapes, gouges, etc. shall be repaired.

13.2 Surface Preparation for Coating Repairs

13.2.1 Small repairs: For repairs up to 2 mm (1/16 inch) in diameter, roughen the surface of the parent coating, to remove gloss, around the holiday for at least 25 mm (1 inch). Use 80 - 120 grit sandpaper or light sweep blasting.

13.2.2 Medium sized repairs: Surfaces of repair areas up to 25 cm2 (4 in2) in size, shall be prepared by abrasive blasting, as specified in Section 11, or by power tool cleaning in accordance with SSPC-SP 11 to remove dirt, scale, rust, damaged coating and any other foreign material to a bare metal condition and retain or produce the surface profile required by Section 11.

13.2.3 Large repairs: Surfaces of repair areas exceeding 25 cm2 (4 in2) shall be repaired by abrasive blast cleaning as specified in Section 11.

13.2.4 The adjacent parent coating and any holidays or damaged coating adjacent to the cutback area shall be roughened for at least 25 mm (1 inch) around the repair and the edges shall be feathered.

13.2.5 After abrading, all dust shall be removed from the prepared areas using compressed air, a clean, dry bristle brush, a clean dry cloth or removed in accordance with SSPC-SP-1 using acetone, xylene or MEK.

13.3 Preheating

13.3.1 When the surface temperature is below the minimum required by Section 12.2 of this Specification, the surface to be recoated shall be preheated as required and in accordance with Section 12.2.

13.3.2 Appendix 5 contains a recommended procedure for preheating and post heating with a hot air gun to accelerate the cure of small and medium sized repairs.




13.4 Low DFT areas

13.4.1 Coating DFTs are specified in Section 12.3.9 or 12.3.10. Areas of low DFT (less than specified) shall be rectified by applying an additional coat, before the maximum recoat interval has elapsed, so that the total thickness meets the specified requirements. If the coating has passed its maximum recoat interval, the areas of low DFT must be stripped and recoated. If the sum total of the areas to be overcoated is less than 1 m2 (1550 in2) in extent per item coated, the applicator has the option of sweep blasting and overcoating in accordance with Section 14.5.

13.5 Overcoating Existing Coatings

13.5.1 If epoxies are overcoated there is a risk that the top coat will delaminate if the surface is not adequately prepared. The contaminants responsible for inter-coat delamination failures may not be visible and are difficult to detect. Epoxies will develop amine blush during curing if they are exposed to water (i.e. rain, etc.), cool and/or humid conditions or if exposed to ambient air containing high levels of carbon dioxide. Light sweep blasting may not be adequate to prepare surfaces that have developed amine blush or that have been contaminated with oil and grease.

13.5.2 Sweep blasting and overcoating is acceptable only if the following procedure is followed.

13.5.3 Written inspection records show that the area to be overcoated has not been exposed to water and that the surface temperature and humidity were controlled to prevent amine blush developing on the surface during curing.

13.5.4 The surface to be overcoated shall be inspected to confirm that it is not contaminated with amine blush, oil, grease, etc. Amine blush may be detected using a suitable test kit or pH indicator paper. If amine blush or other contamination is suspected or detected, the contaminated areas may not be over-coated, but must be stripped and recoated.

13.5.5 The surface to be overcoated shall be roughened by sweep blasting.

13.5.6 The previously coated surface shall be dry, free from moisture, dust or foreign matter at the time the multi-component liquid coating is applied.

13.5.7 When the surface temperature is below the minimum required by Section 12.2 of this Specification, the surface to be recoated shall be preheated in accordance with Section 12.2.

13.5.8 The surface preparation between coats and the overcoat application shall be inspected by the applicators inspector, and the inspection shall be documented.

13.5.9 This is not applicable to steel reinforcement sleeves and piping through clamps, braces, supports, etc.

13.6 Stripping of Defective Coating

13.6.1 Coated areas in which the multi-component liquid coating has not cured properly or is defective shall be stripped and recoated in accordance with the requirements below.

13.6.2 Defective coating shall be completely removed by suitable methods such as scraping, grit blasting and/or solvent wiping.

13.6.3 The surface shall be completely clean, dry and free from defective coating, moisture and foreign matter while recoating.




13.6.4 Edges of adjacent cured coating shall be feathered and all dust produced by the cleaning and feathering shall be wiped off with a xylene soaked cloth before patching commences.

13.6.5 The surface shall then be prepared and coating applied in accordance with Sections 11 and 12.

13.7 Application of Repair Coatings

13.7.1 The spray or brush grade multi-component liquid coating repair material shall be mixed and applied to the area to be repaired as required by Section 12. The coating repair material shall cover the defect area and shall overlap the parent coating a minimum of 25 mm (1 inch). The DFT of the repair area shall be as required by Section 12.3.9 or 12.3.10.

14 ADHESION AND CURE TESTS

14.1 Adhesion Test Using X-cut

14.1.1 The coating inspector shall conduct this test (refer to Section 15.3) on girth welds, tie-in welds, pipe or pipe assemblies (whenever possible) and/or on test panels (refer to Section 15.2). A minimum of two (2) samples are required per shift (max. 10 hr) when the tests are conducted on girth welds, tie-in welds, pipe or pipe assemblies. The curing test shall be done when the coating has completely cured as determined by the Applicators coating inspector. The coating inspector shall complete training on how to complete this test and how to interpret the results.

14.2 Test Panels

14.2.1 Prepare samples by grit blasting mild steel panels (approximately 100 mm x 100 mm x 6.4mm (4 in x 4 in x 1/4 in) size) to near white finish.

14.2.2 During production, apply the coating onto the test samples according to the application that is being tested (i.e. spray or brush). A minimum of two (2) samples are required per shift (max. 10 hr). The first sample shall be prepared within the first thirty (30) minutes of the production run and the second sample shall be prepared within the last thirty (30) minutes of the production run.



Library: EDMS - General Page 24 of 35

14.3 Test Procedure

14.3.1 After the coating has cured, conduct a "X-cut test using the following procedures:

a) Using a utility knife as stated below, make 13 mm (0.5 in) (approximately) long scribes through to the metal surface to form an X with an angle of approximately 30 at the intersection point.

b) Starting at the point of intersection, force the coating from the steel substrate using a sharp pointed knife. Care should be taken to protect the eyes and hands when carrying out this operation.

14.3.2 The utility knife shall have a length, without the blade, of 135 20 mm (5 1/16 inch) and a one-piece metal blade having dimensions as shown in the following sketch and an exposed cutting edge of 25mm 6 mm (1 1/4 inch).

25mm 6 mm (1 1/4 inch), thickness = 0.65 010 mm (26 4mil)

19 3mm (3/4 1/8 inch) tall 56 6 mm (2 1/4 1/4 inch)

14.4 Rating

14.4.1 Refusal of the coating to peel or a cohesive failure within the coating shall be recorded as a "Pass."

14.4.2 Cohesive failure, caused by voids leaving a honeycomb structure on the specimen surface, shall constitute a failure.

14.4.3 The extent of the adhesive failure between the coating and the metal substrate shall be recorded. A disbonding to the metal surface of up to 4 mm (0.2 in) from the center point of the cross should be regarded as satisfactory.

14.5 Cause for Rejection

14.5.1 Where the test fails to conform to the specified requirements, additional sampling shall be performed to ascertain the extent of failed coating. At the Company's option, all affected coating determined to have failed the testing may be rejected. Rejected coated pipe shall be stripped and recoated.

Item ID: 003671710 Effective Date: 2011/Nov/23




14.6 Cure Test Using Shore D Hardness

14.6.1 Shore D hardness shall be measured on production applied coating with a type D durometer. The coating is considered sufficiently cured for handling or backfilling if a minimum Shore D hardness reading of 80 is obtained. The minimum test frequency shall be four samples per shift (max. 10 hr).

14.6.2 The coating thickness must be 762 m (30 mils) minimum at the spot where the hardness reading is measured. It is recommended that, during coating application, the applicator identifies the area where the hardness test will be done and applies sufficient coating to achieve at least 762 m (30 mils) in this area. If Shore D hardness is measured on the overlap area, the total thickness of the coating shall be at least 762 m (30 mils) greater than the thickness of the underlying overlapped coating.

14.6.3 The coating temperature shall be at least 10C (50F) when the hardness is measured. To avoid damaging the coating, it should be confirmed to be hard-dry with a thumbnail before the Shore D test is done. Field Shore D meters will give false readings if pushed too fast or too slowly. Hold the gauge in near-vertical position and press foot of gauge firmly against the coating. Consistency is important, test the second and third area in the same way as the first.




APPENDIX 1 MAINLINE RECOATING USING LINE TRAVEL EQUIPMENT MAINLINE RECOATING

1 GENERAL REQUIREMENTS

The following requirements are only applicable for line travel equipment used on large scale recoating projects and shall be additional to the requirements in this Specification. The purpose is to identify and measure various parameters of the operation such that if there is any deviation from optimum, such deviations may be determined and corrected in order to guarantee the proper surface preparation and coating application according to the requirements of this Specification.

The Contractor shall be responsible for the quality of the Mainline Recoating and shall verify the following:

a) Equipment Operation

b) Surface preparation

c) Coating Application

The Company shall provide supplementary inspection services and shall reserve the right to reject or accept any aspect of the recoating process.

The Contractor shall perform the quality assessment detailed in this Section to confirm the operational performance of the Hydroblast Cleaning Module (if any), Surface Preparation Module and the Coating Application Module.

2 EQUIPMENT OPERATION

2.1 Hydroblast Cleaning Module

The Contractor is responsible for the pre-removal of any deleterious material that cannot be readily removed by the Blast Cleaning Module. If a Hydroblast cleaning module is used prior to the Blast Cleaning Module, the resultant surface, after Hydroblast cleaning must be examined to ensure that sufficient removal has been accomplished. Any remaining deleterious material such as heavy corrosion, rust scale, tape, tape adhesive, or elastomeric coating, etc., that cannot be readily removed by the Blast Cleaning Module will require further removal. Such removal methods may be done using solvent cleaning, hand or power tools, or other Companys approved method in order to accomplish the desired pre-cleanliness.

2.2 Surface Preparation Module

Operational verification procedures for the Surface Preparation Module shall include a review, periodic sampling, and recording of the following Ammeters, Abrasive Bin Levels, Air Cleaner, and Abrasive Operating Mix as described below:

a) Ammeters

Ammeters shall be monitored for an assessment of the quantity of abrasive blast media being thrown by the blast-cleaning wheel. The ammeter reading is a direct indication of the loading of the drive motor and shall be monitored and recorded by the Contractor for optimum performance in the ranges and frequencies listed below:




Acceptable Performance: Barring instantaneous excursions, ammeter readings shall be within the manufacturers acceptable range. The Contractor shall submit for the Companys approval, evidence of manufacturers recommended range, recommended frequency of inspection and verification method for ammeter readings.

Ammeter readings found to be outside the manufacturers recommended range for extended periods of time may be cause for interruption of the blast cleaning process until corrected in accordance with manufacturers recommended procedures and may require reblasting of affected pipe at the Companys discretion.

b) Abrasive Bin Levels

The Contractor shall be responsible for maintaining abrasive levels within the abrasive feed bin at a minimum level for proper equipment operation.

Optimal performance: Maintain the abrasive level above storage bin level control probe. Frequency of Inspection: In the absence of automatic feed bin low level alarms, the operator

shall inspect the abrasive bin level every sixty (60) minutes. Companys Inspector shall inspect every 120 minutes.

Insufficient maintenance of the minimum level shall be cause for interruption of the blasting process until corrected.

c) Air Separators

The Contractor shall monitor the air separators to ensure the removal of oversize contaminants, foreign contaminants, and undersize abrasive particulate. Air separators shall be cleaned as required to ensure control of the abrasive operating mix.

d) Abrasive Operating Mix

The Contractor shall ensure the optimal size profile and mix of the blasting media to obtain the required surface cleanliness and anchor pattern. Verification that the abrasive mix meets the requirements of this Specification shall be by screen analysis and abrasive appearance. The Operator and the Companys Inspector shall perform a screen analysis twice daily to insure that the size of the abrasive mix is within the specified size range distribution.

Specification of oversized, properly sized, and undersized abrasive shall be in accordance with that listed in the Project Description.

2.3 Coating Application Module

Operational verification procedures for the monitoring of the Coating Application Module shall include:

a) The Contractor shall submit for the Companys approval, written procedure for verification of the proper operation of the Coating Application Module.

b) Verification of the coating mix ratios and application rates shall be in accordance with the coating manufacturers recommendations. The Contractor shall submit, for the Companys approval, the mix ratio and application rates, and the methodology to be used for verification of these parameters.




2.3.1 Blast Cleaning Cleanliness

The Contractor shall ensure that the blasted surface meets the requirements of this Specification.

Cleanliness verification shall be done using SSPC/NACE photographic standards SSPC-VIS 1-89. Visual Comparator shall be performed continually to verify the visual conformance of the blast cleaned surface to the predetermined standard. In addition to the Swedish Pictorial and SSPC Visual Comparators, a job site standard consisting of blast cleaned steel will be used to verify the pipe steel surface preparation. If the blast cleanliness falls below the standards of visual comparator, the blast cleaning module shall be stopped, the problem corrected and the unsatisfactorily cleaned area re-blasted and cleaned until SSPC SP10/NACE 2 cleanliness has been obtained.

The Inspector shall verify that the Contractor has met the specified requirements for surface cleanliness.

2.3.2 Blast Cleaning Anchor Profile

The Contractor shall ensure that the blast cleaned surface has a 64 - 114 m (2.5 - 4.5 mils) angular anchor pattern. The anchor pattern profile shall be continually monitored using Testex tape to confirm the depth profile. The Inspector shall perform portable profilometer measurements as warranted to evaluate the angularity of the profile. Insufficient or under angulated profile will require re-blasting to meet the requirements of this Specification.

The Inspector shall verify that the Contractor has met the specified requirements for Blast Cleaned Anchor Profile

2.3.3 Surface Contamination after Blast-Cleaning

The Contractor shall check for residual contaminants from incidental wind-blown dust, dirt and debris prior to the coating application. Testing shall be performed as warranted on blast cleaned surfaces that are downstream of the 360 air knife blower. Using ISO 8502-3, an appropriate tape shall be firmly pressed to and rubbed on to the steel surface. The tape is then removed and compared to the pictorial reference in ISO 8502-3. The same procedure shall be followed for testing blast cleaned surfaces between the air knife blower and the coating application module when the line travel module is shut down or interrupted sufficiently long enough to permit a safe reliable test. Piping that does not meet the requirements for allowable residual contaminants as specified in the project description may require re-cleaning using approved procedures or re-blasting.

The Inspector shall verify that the Contractor has met the specified requirements for surface cleanliness after blast cleaning.

2.3.4 Testing of the Applied Coating System

The Contractor shall conduct testing of the applied coating according to Section 15 of this Specification.

Two sections per valve section (pipe rings) of the production run will be cut in order to perform the corresponding laboratory tests.

The quality of the raw coating material will be certified and inferred through the mixing ratio characteristics, ease of spray application, verification of tack-free and curing time, wet and dry film thickness testing and X cut adhesion testing that will be carried out in the field.




APPENDIX 2 TIE-IN PROCEDURE FOR ASPHALT, THIN FILM TAPE AND COATING THE EDGE TRANSITION OF CLAMPS, BRACES AND SUPPORTS

1 SCOPE

These procedures describe the technical requirements for:

Tying in old parent coatings to newly applied EPU coatings. Coating the edge transition of clamps, braces supports, etc. For steel reinforcement sleeves,

clamp, braces, supports, etc. use Option 1 and refer to Section 12 of this Specification.

Coating the edge transition of steel reinforcement sleeves. For tie-ins below 0C (32F), Option 1 may be preferred due to the ease of application.

2 PETROLATUM COATING AND GLASS OUTER WRAP (OPTION 1)

Approved Materials Approved

Manufacturer Coating Component Approved Product

Denso Primer Denso Paste Tape Denso LT petrolatum tape Fibreglass outer wrap Denso syntho-glass

2.1 Storage

Coating components shall be stored at 4 to 46C (40 to 115F). Coating components shall be maintained between 4 and 46C (40 and 115F) during application.

2.3 Surface Preparation

Remove dirt, dust, moisture and other contaminants from the old coating parent being lapped onto. This is not applicable for clamps, braces, supports, etc.

2.4 Application of Petrolatum Coating and Fibreglass Outer Wrap at Tie-in Area

Petrolatum coating shall be applied after coating repairs and holiday detection.

Petrolatum coating shall be applied in accordance with Company Specification TES-COAT-PET.

Petrolatum primer and tape shall start at least 75mm (3 in) on the existing parent coating and shall be applied at least 75mm (3 in) onto the newly applied coating.

Glass Outer Wrap shall be applied to the petrolatum coating as follows:

Use temperate water to activate the resin in the glass outer wrap. In cold weather (0C (32F) or below, ambient temperature), methyl alcohol (cold weather windshield washer fluid) may be used. Soak glass outer wrap in either liquid for 20 to 30 seconds prior to application.

Spiral wrap the glass outer wrap with a minimum overlap of 55% of the wrap width (e.g. for 100 mm (4 in) wide wrap, overlap shall be 50 mm (2 in)). A minimum of two (2) separate layers shall be applied. Additional layers will provide additional mechanical protection.

Apply glass outer wrap to be free of wrinkles and voids.



Library: EDMS - General Page 30 of 35

Glass outer wrap shall be spirally wrapped over the entire petrolatum areas and onto the existing parent coating by 75 mm (3 in).

Glass outer wrap will be considered ready to backfill when the resin in the glass outer wrap has cured so that there is adhesion between the layers of itself.

3 MOLDABLE SEALANT (OPTION 2)

Approved Material Approved

Manufacturer Coating Component Approved Product

Kema Coatings Limited Tape Kema 250 (12) Tape 3M Top Coat 330L Modulated Sealant Top Coat

3.1 Storage

Maintain tape at temperatures between 16 and 29C (60 and 85F) for at least twenty-four (24) hours immediately prior to use. Keep tape within these temperature ranges during application.

3.2 Surface Preparation

Remove dirt, dust, moisture and other contaminants from the old parent coating being lapped onto. Primer is not required as there is no bare steel allowed.

3.3 Application of Tape

Wrap the tape full circumference of the pipe to be coated, starting 75 mm (3 in) on the parent coating. Butt the next wrap of tape to this and continue the process until tape exceeds on the newly applied coating by at least 75 mm (3 in). Do not overlap the tape onto itself. At each butt seam, apply a wrap around each seam. Apply tape with a 50/50 portion on each side of the butted seam and press firmly down. Use tension in wrapping to obtain conformability to the surface being coated. Applied tape shall be free of wrinkles and voids.

Item ID: 003671710 Effective Date: 2011/Nov/23




APPENDIX 3 FIELD TESTING OF ABRASIVE BLASTING MEDIA

Abrasives used for blast cleaning must be tested for the presence of salt and oil. The abrasive shall be tested at the beginning of each shift or at the Companys discretion. This applies for both recycled and one time use abrasives.

A sample of at least 100 ml of abrasive is mixed with an equal volume of distilled water in a clean transparent container. The mixture is agitated for at least thirty (30) seconds. The abrasive is then allowed to settle to the bottom of the container. The chloride content of the mixed water may not exceed 3ppm (3 mg/l). The mixed sample, in water, shall show no presence of oil, either on the surface of the water or as an emulsion in the water, when examined visually after standing for thirty (30) minutes. If either the salt or oil test fails the entire pallet (or bulk container) of abrasive must be rejected. Each pallet of abrasive must be tested until three pallets (or bulk containers) in a row pass testing.

The recommended field method for measuring the chloride content of the mixed water (solution) is to use a chloride ion detection tube (Kitagawa tube) as detailed in the procedure below. This method uses sealed vacuum tubes with crystals impregnated with silver dichromate (pink).

The ends of the tubes are snapped off, opening the tube much like a straw. When one end of the tube is immersed in the solution, capillary action wicks the solution to the top of the tube. On contact with the chloride ion the silver dichromate converts to silver chloride (white), when the solution reaches the top of the tube, the white cotton at the top changes color to amber. This indicates the test is complete. Graduations on the side of the tube provide the level of chloride ions present in the solution. This method is described in ISO 8502-5.

The tubes most commonly used for field measurement of chlorides have a detection range of +0 to 60 ppm. Suitable tubes are: Kitagawa 201SB from Kitagawa America (detection range of +0 to 60 ppm). Elcometer 134 CHLOR*TEST Salt Detection Kit (detection range of +0 to 50ppm).




APPENDIX 4 TESTING FOR SALT ON BLAST CLEANED SURFACES

Testing shall be conducted to verify that blast cleaned surfaces do not contain detrimental levels of soluble salt contamination. Testing shall be done in accordance with the procedures outlined below.

On line-pipe, the test frequency shall be the first three joints at the start of the project and then once per fifty joints. If salt is detected then the test frequency shall be every joint until salt is not detected on at least ten consecutive joints. For all other items (field repairs, tie-ins, valves, fittings, risers etc.) the test frequency shall be once per item. However, should a truck load of valves or fittings at a fabrication facility require testing, the test frequency shall be twice per truck load.

Testing shall be done on the blast cleaned surface. Salt testing prior to blast cleaning is not required but is advisable and recommended, to facilitate salt removal by water washing prior to blasting.

Testing may be done with ferricyanide paper or a commercially available salt contamination test kit. If ferricyanide paper is used, the criterion for acceptance shall be a negative result (no dark dots visible). If a test kit is used, the salt contamination level shall be less than 5 g/cm2 chlorides. Test kits shall be used in accordance with the manufacturers instructions. Flash rusting caused by wetting the test area during the salt test shall be removed by sweep blasting.

Salt contamination test kits are available commercially from Elcometer (www.elcometer.com), Chlor*Rid (www.chlor-rid.com), Paul Gardner Co. (www.gardco.com), KTA Tator (www.ktagage.com) and Manus Abrasives (www.manusabrasive.com).

If testing is done with ferricyanide paper, it should be used as follows.

Spray the surface to be tested with a mist of distilled water. Do not use drinking water as it contains salts, distilled water is available at most pharmacies and grocery stores. Wait at least sixty (60) seconds for the water to react with the surface then place a piece of ferricyanide paper on the wet area. Make sure the paper wets out completely, spray additional distilled water if needed but do not allow water to run off. Leave the paper on the surface for at least sixty (60) seconds, if no dark dots appear this is a negative result indicating that no ferrous ions were detected. If dark blue dots form on the paper, this is a positive result and it indicates that the surface is contaminated with ferrous ions.

Ferricyanide paper may be made by soaking laboratory filter paper in a 5% solution of potassium ferricyanide in distilled water and allowing the paper to dry. The paper may be stored for up to two weeks in a dark envelope. Prior to its use ferricyanide paper should no

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