34-SAMSS-517

Previous Issue: 25 August 2007 Next Planned Update: 25 August 2012 Revised paragraphs are indicated in the right margin of 12 Primary contact: Vedula, Suryanarayana X. on 966-3-8746406

Copyright©Saudi Aramco 2009. All rights reserved.

Materials System Specification

34-SAMSS-517 9 August 2009 Density Meters

Instrumentation Standards Committee Members Juaib, Mohammed Khalifah, Chairman Tuin, Rienk, Vice Chairman Chetia, Manoj Dakhil, Tareq Khalil Ell, Steven Tal Fadley, Gary Lowell Faer Al Sharif, Hisham Mohammed Falkenberg, Anton Raymond Grainger, John Francis Harbi, Ahmed Saad Jumah, Yousif Ahmed Khalifa, Ali Hussain Mahmood, Balal Mathew, Vinod Qaffas, Saleh Abdal Wahab Qarni, Mahdi Ali Sahan, Fawaz adnan Saleem, Hesham Salem Trembley, Robert James

Saudi Aramco DeskTop Standards Table of Contents 1 Scope............................................................ 2 2 Conflicts and Deviations................................ 2 3 References.................................................... 2 4 General Requirements.................................. 3 5 Environmental Conditions.............................. 4 6 Design Requirements.................................... 6 7 Technical Requirements................................ 8 8 Testing and Inspection................................ 10 9 Documentation............................................ 11 10 Identification................................................ 12

Document Responsibility: Instrumentation Standards Committee 34-SAMSS-517

Issue Date: 9 August 2009

Next Planned Update: 25 August 2012 Density Meters

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1 Scope

This Saudi Aramco Materials System Specification (SAMSS) together with the

appropriate Instrument Specification Sheet(s) (ISS), define the minimum technical

requirements for Density Meters.

2 Conflicts and Deviations

2.1 Any conflicts between this specification and other applicable Saudi Aramco

Materials System Specifications (SAMSSs), Engineering Standards (SAESs),

Standard Drawings, (SASDs), or industry standards, codes, and forms shall be

resolved in writing by the Company or Buyer Representative through the

Manager, Process & Control Systems Department of Saudi Aramco, Dhahran.

2.2 Direct all requests to deviate from this specification in writing to the Company or

Buyer Representative, who shall follow internal company procedure

SAEP-302 and forward such requests to the Manager, Process & Control Systems

Department of Saudi Aramco, Dhahran.

3 References

Material or equipment supplied to this specification shall comply with the latest edition

of the references listed below, unless otherwise noted.

3.1 Saudi Aramco References

Saudi Aramco Engineering Procedure

SAEP-302 Instructions for Obtaining a Waiver of a

Mandatory Saudi Aramco Engineering

Requirement

Saudi Aramco Inspection Requirements

Form 175-345300 Density Meters

Saudi Aramco Forms and Data Sheets

8020-517-ENG ISS for Density Meters

NMR-7907 Nonmaterial Requirements for Instrumentation

(General)

3.2 Industry Codes and Standards

American National Standards Institute

ANSI/ASME B1.20.1 Pipe Threads General Purpose (Inch)

http://standards/docs/SAEP/PDF/SAEP-302.pdf

http://standards/docs/SAEP/PDF/SAEP-302.pdf

http://standards/docs/Inspection_Requirements/PDF/175-345300.pdf

http://standards/docs/Forms_Data_Sheets/XLS/SA-8020-517.XLS

http://standards/docs/Nonmaterial_Requirements/PDF/SA-7907.pdf




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American Society of Mechanical Engineer

ASME B16.5 Pipe Flanges and Flanged Fittings

National Association of Corrosion Engineers/International Standardization

Organization

NACE MR0175/ISO 15156 Petroleum and Natural Gas Industries-

Materials for use in H2S-Containing

Environments in Oil and Gas Production

National Electrical Manufacturers Association

NEMA ICS 6 Enclosures for Industrial Controls and Systems

NEMA 250 Enclosures for Electrical Equipment

(1000 Volts Maximum)

National Fire Protection Association

NFPA 70 National Electrical Code (NEC)

NFPA 496 Purged and Pressurized Enclosures for Electrical

Equipment

International Electrotechnical Commission

IEC 60529 Degrees of Protection Provided by Enclosures

IEC 61000-4-3 Electromagnetic Compatibility-Testing and

Measurement Techniques

4 General Requirements

4.1 Acceptable Density Measurement Technologies

Density meters purchased under this specification shall be based on one of the

technologies listed below. If process conditions or applications dictate using

any other technology, a prior approval of the Supervisor, Instrumentation Unit,

Process Instrumentation Division, P&CSD shall be obtained.

4.1.1 Straight-through vibrating tube(s)

4.1.2 Insertion vibrating probe (cylinder, fork tine, etc.)

4.1.3 Coriolis

4.1.4 Sonic/Ultrasonic (for indication application only)

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Commentary Note:

Density meters in custody measurement or product interface detection applications shall be straight-through tubes only.

4.2 Equivalent Materials

Specification of or reference to materials by brand names or proprietary names

is not intended to exclude equivalent materials that may be offered by other

suppliers. Items of comparable type, quality, and performance characteristics

may be proposed.

4.3 Vendor Responsibility

Compliance with the provisions of this SAMSS does not relieve the Vendor from

the responsibility to furnish equipment of proper design to meet the specified

environmental, electrical, application, service, and operating conditions.

5 Environmental Conditions

5.1 Temperature

The equipment shall operate continuously under the following ambient air

temperatures without any degradation of the manufacturer's guaranteed

performance:

Indoor Air Conditioned (2)

Outdoor Sheltered (1)(2)(3)

Outdoor Unsheltered (2)(3)

Maximum 35°C (95°F)

55°C (131°F)

65°C (149°F)

Minimum 10°C (50°F)

0°C (32°F)

0°C (32°F)

Notes:

(1) "Sheltered" refers to permanent, ventilated enclosures or buildings, or permanently fixed sunshades with a top and three sides.

(2) For instruments which dissipate internal heat and are installed in custom engineered enclosures (e.g., enclosures not included in the original manufacturer's temperature certification), an additional 15°C shall be added to the above maximum temperatures. An example, for "indoor air conditioned" installation, the equipment must perform at 35 + 15 = 50°C. Similarly, for the "outdoor unsheltered" case, the equipment shall be designed for a maximum operating temperature of 65 + 15 = 80°C.

(3) For the outdoor installations only, the designer can take credit for forced or passive cooling to eliminate or reduce the 15°C heat rise. For example, if vortex coolers are used, the heat removal capacity of the coolers may be subtracted from the generated heat. No more than 15°C reduction in temperature will be given as credit. The designer shall substantiate his claim by providing the support data and calculations.




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5.2 Contaminants

The manufacturer shall ensure that the equipment is designed to withstand the

following air quality requirements:

5.2.1 Dust Concentration

Usual airborne dust concentration is 1 mg/m³. During sandstorms, dust

concentrations may reach 500 mg/m³. Particle sizes are as follows:

95% of all particles are less than 20 micrometers

50% of all particles are less than 1.5 micrometers

Elements present in dust include compounds of calcium, silicon,

magnesium, aluminum, potassium, chlorides and sodium. When wetted

(high humidity conditions) these compounds function as electrolytes and

can result in severe corrosion.

Other pollutants present in the atmosphere under the extreme conditions

are:

H2S 20 ppm (vol/vol)

Hydrocarbon 150 ppm (vol/vol)

SO2 10 ppm (vol/vol)

CO 100 ppm (vol/vol)

NOx 5 ppm (vol/vol)

O3 1 ppm (vol/vol)

5.2.2 Wind-borne Sea Water Spray

Equipment which is not enclosed or hermetically sealed, but is situated

offshore or near shore (i.e., within 1 km from shoreline), shall be

protected against corrosion and operational failure due to wind-borne sea

water spray and the accumulation of wetted salt (NaCl).

5.3 Humidity

Indoor humidity design basis shall be 20% to 80% relative humidity.

Outdoor design basis shall be 5% to 95% relative humidity (non-condensing).




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6 Design Requirements

6.1 Engineering Units

Unless specified otherwise all engineering units shall be in the International

System of Units (SI). Equivalent values in conventional (English) units

enclosed in parentheses may follow the SI units. When they are not critical, the

equivalent conventional values may be rounded to their nearest practical values.

This requirement does not apply to the vendor's standard documentation.

6.2 Mechanical Requirements

6.2.1 Wetted parts of the density meter shall be made of materials suitable for

the process medium. For sour service, the density meter shall comply

with NACE MR0175/ISO 15156.

6.2.2 All insertion type density meters shall be equipped with on line

retraction mechanism.

Exception:

Density meters installed in a way that it can be isolated without affecting the operation of the facility do not require retraction mechanism.

6.2.3 All threaded pipe connections shall comply with ANSI/ASME B1.20.1.

6.2.4 All flanged pipe connections shall comply with ASME B16.5.

6.2.5 Aluminum instrument enclosures shall be copper-free (contains less than

0.5% copper).

6.3 Electrical Requirements

6.3.1 Certification

Electrical components or devices which are intended for operation in

locations classified as hazardous shall comply with the requirements of

NFPA 70, National Electrical Code, Article 505, and shall be third party

certified (labeled) by one of the following: UL, FM, CSA or any

recognized European Community authority (CENELEC).

6.3.2 Purging

When purging systems are used to alter (reduce) the electrical

classification of an enclosure, such purging systems shall comply with the

requirements of NFPA 496 and National Electrical Code, Article 505.






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6.3.3 Voltage and Frequency Variations

Electrical power sources for instrument use may vary within the

following limits, unless stated otherwise on the specification sheet:

Nominal Tolerance

24 VDC 21-28 VDC

120 VAC 110-126 VAC, 60 ± 2 HZ

6.3.4 Intrinsically Safe Systems

Intrinsically safe design may be used only with prior approval of the

General Supervisor, Process Instrumentation Division, P&CSD.

6.3.5 Color Coding

Color coding of AC power source wiring shall be as follows:

Live Black

Neutral White or Natural Gray

Ground Green or Green with Yellow Strip

6.3.6 Radiated Electromagnetic Susceptibility Test

The vendor shall provide test certificates in accordance with IEC 61000-

4-3, Level 3 (10 volts/meter) to confirm the equipment will operate

properly when energized and subjected to an electromagnetic field from

a radiating source.

6.3.7 Miscellaneous Electrical Requirements

6.3.7.1 When conformal coating of printed circuit boards (PCB) is

specified, Vendor's standard coating shall be acceptable, unless

otherwise stated. PCB edge connectors shall be gold plated.

6.3.7.2 When electromagnetic relays are specified they shall be

hermetically sealed and have isolated contacts with minimum

ratings of 0.5A, 120 VAC, non-inductive.

6.3.7.3 Electrical equipment enclosures shall conform to NEMA ICS

6, NEMA 250, or IEC 60529.

Enclosures not required to be explosion proof, shall be

specified as NEMA 4X.




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6.3.7.4 A plainly marked, easily accessible equipment enclosure

grounding connection shall be provided.

6.3.7.5 External wiring connections (i.e., at the junction box) shall be

to screw-type terminal blocks or channel (rail) mounted, strip-

type terminal blocks, with tubular box clamp connector and

compression bar or yoke.

All terminals for external wiring shall be identified with

polarity symbols, and the words, "output", "power supply" or

relay contact symbol, as applicable.

7 Technical Requirements

The following technical requirements together with those in the documents cited as

references in Section 3 of this Specification, and with the specific data per the

referenced Instrument Specification Sheet(s) shall constitute the minimum technical

requirements for the specified instruments.

7.1 Performance Requirements

The minimum performance requirements for density meters are:

Accuracy

Liquid: 0.25% of span

Gas: 0.25% of span

Repeatability

Liquid: 0.01% of range

Gas: 0.01% of range

Exception:

Density meters in custody measurement application shall have an accuracy of ±1 kg/m³, repeatability of 0.5 kg/m³ and a calibrated range suitable for the application. Calibrations within the range of 650 kg/m³ to 1450 kg/m³ shall be established using air and two oils. Calibrations between 300 kg/m3 and 650 kg/m³ may be established through extrapolation.

7.2 Standard Conditions

Standard (Base) conditions shall be specified consistent with the following:




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SPECIFIED UNITS

SI Conventional

Application P (kPa) T (°C) P (psia) T (°F)

Process 101.325 15 14.696 60

Royalty/Custody 101.325 15 14.696 60

7.3 Method of Sampling

When the method of sampling is not specified on Form 8020-517-ENG, Vendor

shall recommend suitable method(s) for Buyer approval.

When method of sampling is specified Vendor shall verify that it is suitable or,

if not, shall recommend optional method(s) for Buyer approval.

7.4 Process Connections

Process connections may be either screwed per ANSI/AMSE B1.20.1 or flanged

per ASME B16.5 depending upon specific installation and application

considerations. Vendor shall recommend process connections for Buyer approval.

7.5 Signal Transmission

Vendor shall recommend type and length of cable for signal transmission. If

special cable is required Vendor shall supply such cable when so specified on

Form 8020-517-ENG.

7.6 Associated Instrumentation

7.6.1 Monitoring Equipment

The monitoring equipment shall be compatible with the density sensing

element and suitable for the application and type of display specified.

Where the monitoring equipment is specified for the computation of

mass flow or volumetric flow, the Manufacturer shall verify that the

model proposed is fully compatible with input signals specified from

other flow measuring devices, such as from turbine meters, P.D. meters

and differential pressure meters.

7.6.2 Display

The monitoring equipment shall be suitable for digital or analog display,

as specified, with readout in the appropriate units of measurement.






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7.6.3 Temperature Compensation

Vibrating tube and coriolis density meters shall incorporate an integral

temperature element to compensate for the process temperature effect on

the sensor.

8 Testing and Inspection

8.1 Vendor Proposal

Vendor shall include his recommended testing procedures in his proposal.

8.2 Buyer Witnessing

Density meters and associated monitoring instrumentation supplied in

accordance with this Specification are subject to the minimum inspection

requirements as specified in Form 175-345300, and will be accepted on

'certificates only' unless witnessed inspection is specified in the Purchase Order.

8.3 Test and Inspection Schedule

The Vendor shall submit an inspection and test check list detailing the

inspection and tests with their acceptance criteria for approval by the Buyer.

In addition, the following tests and inspections shall be performed by the

manufacturer and may be witnessed or executed by Buyer or Buyer's

Representative when so specified:

8.3.1 Visual Inspection

A visual inspection and physical check shall be made for compliance of

the material with requirements of the specifications of the original

Purchase Order and all subsequent change orders including the relevant

attachments and with Manufacturer's catalog description and certified

drawings furnished. Included are:

a) Check for satisfactory workmanship, materials and freedom from

surface defects and broken glass;

b) Check for compliance with certified drawings including

dimensions;

c) Check for all accessories on purchase order;

d) Check for required cable length;

e) Check paint for imperfections;

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f) Verify that each component has a tag of corrosion resistant material

permanently fastened to the unit and stamped with information as

specified in Paragraph 10; and

g) Verify that all terminals for interconnecting wiring between units

are accessible for connecting and checking. Terminal blocks

should be numbered and where 2 or more are present, should have

block identification. Interconnecting cables shall be color-coded or

numbered.

8.3.2 Functional Testing

Each density analyzer system shall be accurately calibrated and tested by

the manufacturer at the normal working conditions specified in ISS

8020-517-ENG. This test shall ensure that the specifications per

Paragraph 7.1 are met.

9 Documentation

All documentation shall be in English and shall be per the NMR listing (Form

NMR-7907 Series) in the Purchase Order.

9.1 Proposal Documentation

In addition to documentation required in the quotation request Vendor shall

submit the following documents with his proposal:

a) Outline Drawings showing front and rear views of controller housings;

b) Connection Drawings of in-line analyzer sensors and auxiliaries;

c) Overall Flow Schematics; and

d) Installation Manual.

9.2 Purchase Documentation

In addition to documentation required in the purchase order, Vendor shall

furnish the following additional documentation upon receipt of a purchase order:

a) Operation Manual, describing system's operation and calibration

procedures allowing field personnel to start-up, operate and safely shut

down the analyzer system;

b) Calibration curves, flows, data, and instrument settings, where applicable;

c) Trouble Shooting Manual, containing trouble shooting diagrams that allow

field personnel to identify a faulty sensor or PCB by means of a simple

step-by-step procedure; and


http://standards/docs/Nonmaterial_Requirements/PDF/SA-7907.pdf




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d) Recommended list of spare parts.

10 Identification

A 316 stainless steel identification plate shall be securely attached to the equipment with

stainless steel fasteners. This tag shall be marked by raised or die stamped lettering and

shall be located so that the information can be seen after the equipment is installed.

This place shall include the following information as applicable:

a) Manufacturer;

b) Model or Part Number;

c) Serial Number;

d) Tag or Mark Number;

e) Electrical Power Requirements;

f) Electrical Area Classification;

g) Capacity Data;

h) Nominal size;

i) Flange Rating; and

j) Calibration Data.

Revision Summary

25 August 2007 Revised the "Next Planned Update". Reaffirmed the contents of the document, and reissued with editorial changes.

9 August 2009 Editorial revision to replace cancelled SAES-A-301 with NACE MR0175/ISO 15156.



34-SAMSS-517

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