SPC-0804.02-92.08 Rev D2 Positive Material Inden

7/31/2019 SPC-0804.02-92.08 Rev D2 Positive Material Inden

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PREPAREDBY

NAPTT PUBLIC COMPANY LIMITED

CHECKED

BY ONSHORE COMPRESSOR STATION 4

PROJECT

APPROVEDBY

CERTIFIED

(PTT)NA

REV.

NO.

DATE REVISED

BY

APPROVED

BY

DESCRIPTION

D1 18-Feb-08 NA ISSUED FOR ITB

D2 11-Jun-08 NA ISSUED FOR ITB

SPECIFICATION FOR

POSITIVE MATERIAL IDENTIFICATION REQUIREMENTS

SPC-0804.02-92.08 REV.D2

TOTAL 15 PAGES

AREA CODE OF SITE LOCATION

GENERAL AREA: 010

.

PTT PLC. CONTRACT NO. PTT PLC. PROJECT NO.

0804.02



POSITIVE MATERIAL

IDENTIFICATION

REQUIREMENTS

PTT PUBLIC COMPANY LIMITED

ENGINEERING SPECIFICATION

SPC-0804.02-92.08

PAGE: 2 OF 15

REV: D2

CONTENTS

SECTION

1.0 SCOPE................................................................................................. 3

2.0 REFERENCED STANDARDS ................................................................. 3

3.0 DEFINITIONS ....................................................................................... 3

4.0 PMI EXAMINATION ............................................................................. 4

ATTACHMENT A: PMI REPORT FORM - ALLOY BULK MATERIALS...............12

ATTACHMENT B: PMI REPORT FORM - SITE MADE WELDMENTS..................14



POSITIVE MATERIAL

IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

PAGE: 3 OF 15

REV: D2

1.0 SCOPE

1.1 This Standard defines the minimum Positive Material Identification (PMI)requirements to be performed at the module construction yards and the

construction site on alloy, pressure retaining piping materials and welds. It shall

apply to both PMI on receipt of materials at the module yard, central marshalling

facility or construction site, as appropriate, and PMI on final installed piping

materials and welds.

1.2 PMI shall be performed on all pressure retaining components, including piping

items, valves, welds, bolting and gaskets, up to, and including the first

instrument block valve. The following items shall not be subject to PMI

unless specifically defined:

(i) Valve gates, stem and trim, internal bellows seals;

(ii) Gaskets other than solid metal or metallic jacketed types (eg. spiral

wound gaskets);

(iii) Carbon steel items

1.3 The CONTRACTOR to ensure that PMI, as defined in this Standard, has been

performed on receipt of the alloy bulk materials, and on all final installed piping

materials and welds, and verify that all material is as specified on the relevant

piping isometrics and bill-of-materials.

1.4 The CONTRACTOR shall provide the right of the inspector to audit,

examinations, and perform, or have performed by others, random PMI

examinations as required

2.0 REFERENCED STANDARDS

ASTM American Society for Testing & Materials

3.0 DEFINITIONS

Inspector: PTT’s appointed inspector.

CONTRACTOR: Any party in contract with PTT for the purpose of

carry out works or services.

Alloy: All non-carbon steel, including but not limited to, Cr-Mo

steels, austenitic, ferritic, martensitic and duplex stainless

steels, nickel and copper alloys, titanium.

Bulk Material: Material purchased in bulk where individual items are not

allocated a unique tag number (eg. random pipe lengths,

tubes, valves, fittings, flanges, bolting, non-process

strainers)



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IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

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REV: D2

Lot: All units from a common heat of material presented

for inspection against a single purchase order item. In

the case of valves, or similar items, wherebodies/bonnets/covers may be from different heats,

the Lot shall consist of all units with the same

combination of heat numbers for pressure containing

components.

Sample: One, or more, units selected at random from the Lot

which are to be examined to determine acceptability

of the Lot.

4.0 PMI EXAMINATION

4.1 General

4.1.1 PMI examination of alloy materials and welds is independent of any certification,

markings or colour coding that may exist and is aimed at verifying that, where

alloy materials are specified in project specification, only the correctly specified

alloy grades are installed.

4.1.2 CONTRACTOR shall identify all alloy materials and maintain full traceability of all

alloy materials.

4.1.3 CONTRACTOR shall ensure that all alloy materials are segregated and stored in

separately identified locations to prevent the mixing of different alloy

specifications or alloy material with carbon steel.

4.2 Methods of PMI Examination

4.2.1 The method used for PMI shall provide a qualitative determination of the critical

alloy elements in accordance with Table 3, without interpretation by the PMI

operator.

4.2.2 The following methods/instruments are acceptable:

(i) Instruments shall have a suitable X-Ray tube or Isotope source, with alloy

verification, Quantitative element analysis, with permanent record

capabilities. The Alloy Analyser used shall be detailed in Vendor’s PMI

procedure, with the technical information providing sufficient

comprehensive data to establish acceptance within project

requirements.

(ii) Wet chemical analysis or other laboratory methods.

4.2.3 All PMI instruments shall have been serviced within a 6 month period of thetime of use to verify the suitability of batteries, sources etc. The date of the last

service shall be stated on the pro-forma PMI Report Forms (Attachments A & B).



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IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

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REV: D2

4.2.4 All PMI instruments shall be calibrated, in accordance with the instrument

manufacturer's recommendation, at the start of each working shift as a

minimum.

4.2.5 Certified samples, with full traceability, of "known" alloy materials shall be

available for use as a random spot check on the instrument calibration. These

samples are in addition to any standard manufacturer's calibration sample.

4.2.6 Surfaces to be examined shall be prepared by light grinding or abrasive paper

and solvent cleaning. Evidence of 'arc burn' resulting from the examination shall

be removed by light grinding or abrasive paper.

4.2.7 It is advised, but not mandatory, that PMI activities be sub-contracted to an

independent PMI sub-contractor, to ensure that experienced, qualified PMIoperators are employed. In all cases, whether PMI activities are sub-contracted

or performed in-house, only qualified operators shall perform PMI and records

showing qualification and experience of PMI operators shall be available.

4.3 Location, Timing and Extent of PMI Examination

4.3.1 On receipt, materials which have been subject to a previous 100% PMI

examination and for which there is supporting PMI marking and certification,

shall, in principle, be accepted for receiving inspection without further PMI

checks. Spot PMI checks may be performed on materials subject to a previous

sample PMI examination to ensure that material control procedures are operatingcorrectly.

4.3.2 For materials which have not been subject to a previous PMI examination, or for

which there is no, or insufficient, PMI marking and certification, PMI shall be

performed on all such materials on receipt to the extent stated in Table 1 prior

to receiving inspection.

4.3.3 All installed alloy bulk materials and welds shall be subject to PMI examination

in the final 'as-installed' condition, but prior to insulation or painting, to the

extent stated in Table 2.

4.3.4 Where a particular constituent of the alloy composition cannot be determined by

the PMI instrument employed (eg. carbon content in austenitic stainless steels,

minor alloying elements in grades of titanium), the instrument shall be used to

verify the major alloy constituents of the material and traceable material test

certificates used to verify the remainder.

4.4 Identification of Acceptable Materials

4.4.1 The CONTRACTOR shall establish the identification marking for acceptable

materials.

4.4.2 For materials subject to receipt PMI examination in accordance with para. 4.3.2

and Table 1, acceptable materials shall be marked by means of a low-stress

(dot, vibratory or 'U' type) hard stamp or indelible, non-deleterious ink or paint

(ie. free of low melting point metals such as zinc, lead, copper etc.), at or



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IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

PAGE: 6 OF 15

REV: D2

adjacent to each PMI sample point on each component or weld. For 'sensitive'

materials such as thin-walled pipe etc., identification shall be by indelible,

non-deleterious ink or paint.

4.4.3 For installed materials and welds subject to PMI examination in accordance with

para. 4.3.3 and Table 2, acceptable materials shall be marked by means of a

low stress (dot, vibratory or 'U' type) hard stamp or indelible, non-deleterious

ink or paint (ie. free of low melting point metals such as zinc, lead, copper etc.),

at or adjacent to each PMI sample point on each component or weld.

4.5 Rejected Materials

4.5.1 Rejected material found on receipt PMI examination shall be segregated in a

separate, designated area, to prevent re-use. A more accurate analysis may beperformed to verify the composition of the rejected material or, alternatively, the

material shall be replaced. Rejected material found during erection PMI

examination shall be removed and replaced.

4.5.2 Rejected weld metal shall be removed by suitable means and the excavation

subject to a PMI check prior to repair. Alternatively, the weld shall be

completely removed, the weld preparation re-made and surface non-

destructively examined, and re-welded. All repair welds shall be subject to PMI

per Table 2, Section 2.

4.6 Recording and Documentation

4.6.1 PMI results for materials subject to receipt PMI examination, whether acceptable

or rejected, shall be reported on a PMI Report Form (Attachment A).

4.6.2 PMI results for as-installed piping materials and welds, whether acceptable or

rejected, shall be reported on a PMI Report Form (Attachment B). The

CONTRACTOR may use his own form providing it includes all the following

data:

- Contractor's Name

- PMI Sub-contractor's name and address, if applicable- Sub-contract number

- Isometric number

- Location and date of PMI examination

- Description of method/instrument used

- Instrument no. and date of last service

- Results of PMI examination

- Type of alloy examined per isometric

- Conclusion

4.6.2 The PMI report for as-installed PMI examination shall be included in the final

piping isometric records.



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IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

PAGE: 7 OF 15

REV: D2

TABLE 1: EXTENT OF PMI - MATERIALS RECEIVED WITH NO PMI MARKINGS

1. Piping Bulk Materials

Random length seamless and ERW pipe: Each component part

Random length fusion welded pipe (ERW pipe excluded): Each component base material part(1). Refer to Section 2 below for tests

on welds

Forged fittings (eg. flanges, branch fittings, weldolets, blinds,plugs, etc.):

Each component part

Seamless and ERW pipe fittings: Each component part

Fusion welded pipe fittings: Each component base material part(1). Refer to Section 2 below for

tests on welds

Valves, including body, bonnet, plugs, vents, drains etc.: Each pressure retaining

component part. Refer toSection 2 below for tests on

welds & Section 3 for tests on

bolting.

Permanent strainers, traps, including blind flanges, plugs

etc.:

Each pressure retaining

component part. Refer to Section

2 for tests on welds and Section

3 for tests on bolting

2. Pressure Retaining Welds

Circumferential welds, including valve body-to-flange and

valve body-to-bonnet welds; Longitudinal welds:

Each weld, with 1 test per weld

seam for automatic and semi-

automatic welding processes,

and 1 test per weld seam and 1

test per 450mm weld length

thereafter for manual welding

processes(2)

Repair welds:

1 test on excavated weld toensure incorrect material fully

removed; thereafter 1 test per

450mm repair weld length



POSITIVE MATERIAL

IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

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REV: D2

3. Bolting

Valve bonnet bolting for flange rating Classes <900 Sample basis per Table 4

Valve bonnet bolting for flange rating Classes ≥900: Each bolt and nut

External pressure retaining bolting for flange rating Classes

<900

Sample basis per Table 4

External pressure retaining bolting for flange rating Classes

≥900

Each nut and bolt

4. Gaskets

Solid metal or jacketed metallic gaskets for flange rating

Classes ≥900

Each gasket

Alloy rings associated with ring-type joints (RTJs) Each ring

Gaskets other than above PMI not required unless

specifically stated

Notes:

(1) PMI on these components may be undertaken in conjunction with PMI of the deposited weld

metal per Note (2).

(2) For all welds, PMI shall be performed on the completed weld capping pass (both internal and

external, where access permits) and the base material on either side.



POSITIVE MATERIAL

IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

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REV: D2

TABLE 2: EXTENT OF PMI - INSTALLED MATERIALS AND WELDS

1. Piping Bulk Materials

Piping, flanges, branch fittings etc. welded into line: Each component base material

part, undertaken in conjunction

with PMI of weld per Section 2.

Flanged or screwed valves, fittings (eg.

plugs),strainers,filters etc. installed into line:

Each component base material

part. Only body shall be tested

on valves

2. Pressure Retaining Welds

Circumferential welds: Each weld, with 1 test per weld

seam for automatic and semi-

automatic welding processes,

and 1 test per weld seam and 1

test per 450mm weld length

thereafter for manual welding

processes (1)

Attachment welds: Each weld per component part(1)

Note:

(1) For all welds, PMI shall be performed on completed weld capping pass and the base material on

either side. Where carbon steel base material is welded to an alloy base material with an alloy

weld metal, the carbon steel base material is exempt from PMI. Where carbon steel base

material is welded to an alloy base material with a carbon steel weld metal, the carbon steel base

material and the carbon steel weld metal are exempt from PMI.



POSITIVE MATERIAL

IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

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REV: D2

TABLE 3: ELEMENTS TO BE DETERMINED DURING PMI

MATERIALS (1) ELEMENTS TO BE DETERMINED

1 Cr - 0.5 Mo

1.25 Cr - 0.5 Mo

2.25 Cr - 1 Mo

5 Cr - 0.5 Mo

9 Cr - 1 Mo

Cr, Mo, V

Cr, Mo, V

Cr, Mo, V

Cr, Mo, V

Cr, Mo, V

12 Cr (Type 410S/405)

12 Cr

17 Cr

304 (L)

310

309 (L)

309 Nb

316 (L)

321

347

Inconel 182/82

Inconel 625

Inconel 600

Incoloy 800

Incoloy 825

Cr

Cr

Cr

Cr, Ni, Mo, Nb(Cb), Ti





Cr, Ni, Ti, Nb(Cb)

Cr, Ni, Nb(Cb), Ti

Ni, Cr

Ni, Cr, Mo, Nb(Cb) + Ta

Ni, Cr

Cr, Ni, Al, Ti, Cu

Cr, Ni, Mo, Ti

Admiralty Brass

Aluminium Brass

Cupro-nickel (70-30)

Cupro-nickel (90-10)

Monel 400

Titanium

Cu, Sn, As

Cu, Al, Zn

Cu, Ni

Cu, Ni

Cu, Ni

Ti

NOTE: (1) List of materials is not exhaustive, and shall not be construed as limiting the alloy

materials subject to PMI

Remark: When it want to verify in minor element e.g. low carbon in stainless steel type 304Lor 410S. CONTRACTOR shall specify identification methods and propose to

PTT/CONSULTANT for approval.



POSITIVE MATERIAL

IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

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TABLE 4: REQUIREMENTS FOR SAMPLE PMI

Number of Units in a Lot Representative Sample

1 -5 100% of all units

6 - 200 5 units or 5%, whichever is greater

≥200 10 units or 3%, whichever is greater

Notes:

(1) If all units of the representative Sample are acceptable, the inspection Lot shall be acceptable.

(2) If any unit from the representative Sample is found to be unacceptable, the remainder of the that

Lot shall be examined 100%. If the remainder of the Lot is found acceptable, the sampling

technique in Table 4 shall be resumed. The unacceptable unit(s) shall be replaced and the

replacements examined 100%.

(3) If a Lot is found unacceptable, the next two Lots, of the same material product and from the same

source, shall be examined 100%. If both Lots are acceptable, the sampling technique in Table 4

shall be resumed.

(4) If any of the Lots examined in (3) above is found unacceptable, the remaining material product from

the same source shall be examined 100%. Any unacceptable unit(s) shall be replaced and the

replacements examined 100%.

(5) When the material markings are incomplete, preventing positive correlation between the material

requisition, purchase order and a material test certificate, the materials shall be rejected.



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IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

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ATTACHMENT A: PMI REPORT FORM - ALLOY BULK MATERIALS

POSITIVE MATERIAL IDENTIFICATION (PMI) - Alloy Bulk Materials

PMI Report #________ Page______of________

Contract No: Supplier:

Order No: Supplier's Ref No:

Requisition No: Sub-Supplier/Manufacturer:

Sub-Suppler/Manufacturer Ref No:

1. Description of Items

Item Type (as per requisition):Material Colour Code:

Material Specification/Grade:

2. PMI Results

Requisition

Item No.

Number of

Items in Lot

Number of

Items Tested

Material test

Certificate No.

Cast/Heat

No.

Accept/

Reject

Date

Examination Location: PMI Inspector:-

Examination Date: Company:

Instrument Type/ID Number: Signature:

Date of Last Service: Date:

(include certificate) Stamp:



POSITIVE MATERIAL

IDENTIFICATION

REQUIREMENTS



SPC-0804.02-92.08

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ATTACHMENT A: PMI REPORT FORM - ALLOY BULK MATERIALS (cont.)

POSITIVE MATERIAL IDENTIFICATION (PMI) - Alloy Bulk Materials


Requisition

Item No.

Number of

Items in Lot

Number of

Items Tested

Material test

Certificate No.

Cast/Heat

No.

Accept/

Reject

Date

Examination Location: PMI Inspector:







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SPC-0804.02-92.08

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ATTACHMENT B: PMI REPORT FORM - SITE MADE WELDMENTS

POSITIVE MATERIAL IDENTIFICATION (PMI) - Site Made Weldments


Contract No: Contractor:

Isometric No.: PMI Sub-contractor:

Area: Instrument Type/ID No.:

Material Type: Date of Last service:

(include certificate)

Weld No./Bulk

Fitting No.

Weld metal

PMI Result

Base Matl. #1

PMI Result

Base Matl. #2

PMI Result

Insp.

InitialsAccept/Reject Date








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SPC-0804.02-92.08

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ATTACHMENT B: PMI REPORT FORM - SITE MADE WELDMENTS (cont.)

POSITIVE MATERIAL IDENTIFICATION (PMI) - Site Made Weldments


Weld No./Bulk

Fitting No.Weld metal

PMI Result

Base Matl. #1

PMI Result

Base Matl. #2

PMI Result

Insp.

InitialsAccept/Reject Date






SPC-0804.02-92.08 Rev D2 Positive Material Inden

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