02-SAMSS-011

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Previous Issue: 9 January 2013 Next Planned Update: 9 January 2018

Revised paragraphs are indicated in the right margin Page 1 of 31 Primary contact: Niemeyer, Dennis Charles on +966-3-8809534

02-SAMSS-011

15 June 2013

Forged Steel and Alloy Flanges

Document Responsibility: Materials and Corrosion Control Standards Committee

Saudi Aramco DeskTop Standards

Table of Contents

1 Scope... 2

2 Conflicts and Deviations... 2

3 References... 2

4 General... 5

5 Materials... 7

6 Corrosion Tests... 12

7 Metallographic Examination... 13

8 Extent of Testing and Inspection... 14

9 Non-Destructive Examinations (NDE)... 15

10 Special Machine Finish for Raised Face (RF) Flanges... 17

11 Repairs... 17

12 Markings... 18

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1 Scope

1.1 This specification covers Saudi Aramco requirements for forged steel and alloy flanges. Special configuration flanges such as pipeline anchors, long weld neck flanges, integrally reinforced flanges, out-size flanges, and lapped joint, swivel ring assemblies, blind flanges, spectacle plates, blinds, and spacers are included. 1.2 This specification does not apply to the following:

1.2.1 Class 150 low pressure sanitary and oily water services unless specified in the purchase order.

1.2.2 Socket weld and threaded flanges, and Type 6BX per API SPEC 6A.

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, Consulting Services 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, Consulting Services Department of Saudi Aramco, Dhahran.

3 References

Materials 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 Standard Drawings

AA-036792 Flange and Ring Details Swivel Ring Flanges

AC-036443 Lap Joint Flanges and Stub Ends Large Size Class 600 Ring Joint

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AC-036486 Lap Joint Flanges and Stub Ends Large Size Class 300 Ring Joint

AE-036438 Details of 54” and 60” Lap Joint Flanges and Stub Ends Class 300 R. J.

Saudi Aramco Inspection Requirements

Form 175-022501 Flanges; Weld Neck, Forged Steel 3.2 Industry Codes and Standards

American Petroleum Institute

API SPEC 6A Specification for Wellhead and Christmas Tree Equipment

American Society of Mechanical Engineers

ASME SEC VIII D1 Rules for Construction of Pressure Vessels Div. 1

ASME/ANSI B16.5 Pipe Flanges and Flanged Fittings

ASME/ANSI B16.47 Large Diameter Flanges

ASME/ANSI B46.1 Surface Texture

ASME/ANSI B16.48 Line Blanks American Society for Testing and Materials

ASTM A105 Standard Specification for Carbon Steel Forgings for Piping Applications

ASTM A182 Standard Specification for Forged or Rolled Alloy-Steel Pipe Flanges, Forged Fittings and Valves and Parts for High Temperature Service

ASTM A262 Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels

ASTM A266 Standard Specification for Carbon Steel Forgings for Pressure Vessel Components

ASTM A275 Standard Test Method for Magnetic Particle Examination of Steel Forgings

ASTM A350 Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components

ASTM A370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products

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ASTM A388 Standard Practice for Ultrasonic Examination of Heavy Steel Forgings

ASTM A508 Standard Specification for Quenched and Tempered Vacuum-Treated Carbon and Alloy Steel

Forgings for Pressure Vessels

ASTM A516 Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service

ASTM A694 Standard Specification for Carbon and Alloy Steel

Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service

ASTM A707 Standard Specification for Forged Carbon and Alloy Steel Flanges for Low-Temperature Service

ASTM A788 Standard Specification for Steel Forgings, General Requirements

ASTM A859 Standard Specification for Age-Hardening Alloy Steel Forgings for Pressure Vessel Components

ASTM A923 Standard test Methods for Detecting Detrimental Intermetallic in Duplex Austenitic/Ferritic Stainless Steel

ASTM A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys

ASTM A961 Standard Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping Applications

ASTM B462 Standard Specification for Forged or Rolled

UNS N06030, UNS N06022, UNS N06035, UNS N06200, UNS N06059, UNS N06686, UNS N08020, UNS N08024, UNS N08026, UNS N08367, UNS N10276, UNS N10665, UNS N10675, UNS N10629, UNS N08031, UNS N06045, UNS N06025, and UNS R20033 Alloy Pipe Flanges, Forged Fittings, and Valves and Parts for Corrosive High- Temperature Service

ASTM E10 Standard Test Method for Brinell Hardness of Metallic Materials

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ASTM E165 Standard Test Method for Liquid Penetrant Examination

ASTM E381 Standard Method of Macroetch Testing of Steel Bars, Billets, Blooms and Forgings

ASTM E562 Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count

ASTM G48 Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution Manufacturers Standardization Society of the Valve and Fittings Industry, Inc.

MSS SP44 Steel Pipe Line Flanges

International Organization for Standardization

NACE MR0175/ Petroleum and Natural Gas Industries Materials ISO 15156 for Use in H2S-Containing Environments in Oil

and Gas Production

4 General

4.1 Definitions

4.1.1 Lot: All items of the same type and maximum thickness which are produced from the same heat of steel and subjected to the same finishing (i.e., heat treatment, amount of working). Heat treatment may be

considered continuous providing all temperatures are controlled within ± 14°C (25°F). Any break in continuous material flow or multiple furnace loads shall be considered separate heat treat lots.

4.1.2 T REF: This indicates the nominal rim thickness of a flange and is normally the thickest cross-section in a flange. T REF has a direct impact on the heat treating practice followed for achieving the desired mechanical properties and metallurgical structure and the method of obtaining

specimens for mechanical properties and chemical composition.

4.2 All flange manufacturers shall perform forging, machining and heat treatment operations either in-house or in a wholly owned subsidiary approved by Saudi Aramco. It is not permitted to outsource forging, machining or heat treatment operations. Machine shops are not considered flange manufacturing facility. 4.3 Flange manufacturers are not permitted to procure rough forging for further

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For all materials: At the time of quotation, the flange supplier shall include a statement for country of origin, if other than the point of shipment. Traceability of finished materials shall extend back to the original steel making facility. 4.4 All new flange installations are designed in accordance with ASME/ANSI B16.5,

B16.47 and API SPEC 6A. The following design codes are referenced for all new flanges with materials in accordance with Table 5:

 ASME/ANSI B16.5: Class 150 thru 2500

 ASME/ANSI B16.47 Series A: Class 150 through 900.

 API SPEC 6A Type 6B: Pressure Rating 3000, 5000 and 10,000 4.5 Product Quality Plan

4.5.1 Prior to first time production, manufacturers whose quality systems and/or products have been assessed and approved by the Vendor Inspection Division (VID) and Consulting Services Department

(ME&CCD/MEU), shall submit on a one time basis, a Product Quality Plan which includes the steps taken to ensure that all requirements of this specification will be included in the Manufacturer's Materials Control and Process Control Documents. This Plan shall identify:

a) Products offered b) Materials to be used

c) Processes performed by the manufacturer d) Processes performed by others

e) Protective coatings and packaging.

4.5.2 The Product Quality Plan shall also provide, for each pressure class, yield strength (F#), and size as shown in Table 6, the following attributes: a) Steel making, including composition and grain size,

b) Manufacturing processes, including hot-work ratios and heat treatment,

c) All required testing and inspection, including frequency, size and orientation of samples and specimens.

4.5.3 Sampling plans for testing and NDE shall be in accordance with Tables 1, 2, 3 and 4.

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Table 1 – Sampling Plan Based on Lot Size

Lot Size Sample Size

2 – 8 2 9 – 15 3 16 – 25 5 26 – 50 8 51 – 90 13 91 – 150 20 151 – 280 32 281 – 500 50 501 – 1200 80 1201 – 3200 125 4.6 Special Designs

Flanges not covered by the ASME/ANSI, API or Saudi Aramco standard

drawings shall be designed in accordance with ASME SEC VIII D1, Appendix 2. These special designs shall be submitted to Saudi Aramco for approval prior to manufacture.

5 Materials

Flange materials shall be carbon steel, high strength low alloy (HSLA) steel, low alloy steel, stainless steel and corrosion resistant alloys as specified in Table 5.

Pipeline anchor flanges shall be of materials shown for F60 or stronger flanges of the same class and size shown in Table 6.

Rings for swivel ring flanges shall be of the same strength level as the welding ends or hubs. ASTM A694 can be used for the swivel ring but not for the welding end. Alternatively, swivel rings can be manufactured from the same material as the welding end or hub.

5.1 Steel Manufacture

5.1.1 All steel grades shall be fully killed, vacuum degassed and melted to fine grain practice

5.1.2 Treatment for inclusion shape-control by addition of calcium is not required for any flanges manufactured to this specification.

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5.1.3 All stainless steelsshall be manufactured from steel produced by the electric furnace process, and subsequently refined by vacuum oxygen decarburization (VOD) or argon oxygen decarburization (AOD). CRAs shall meet the requirements of the respective ASTM standards. 5.2 Forging Processes

5.2.1 All flanges are required to meet the definition of hot worked forgings in ASTM A788 and ASTM A961 and all other such appropriate general requirements:

 Flanges shall be hot worked by press, hammer, or ring-mill of sufficient capacity to produce a substantially wrought structure throughout the rim (T REF in Table 6);

 Flanges shall be hot worked as close as practicable to finished dimensions.

5.2.2 Continuous-cast steel shall be hot-worked to a minimum 2:1 ratio before blanks are cut for die forgings. All such perform raw material shall be capable of meeting a C2; R2; S2 rating, as described in ASTM E381, prior to profile forging to near net shape. Residual as-cast structure in the rim is not permitted.

5.2.3 Blanks for open-die-forged flanges, hammer-forged flanges, and ring-rolled flanges shall be hot worked to a minimum reduction ratio of 2:1 before forging to shape or ring-rolling is initiated. All such pre-form raw material shall be capable of meeting a C2; R2; S2 rating, as described in ASTM E381, prior to profile forging to near net shape.

5.2.4 All flanges greater than 24 inch diameter shall be ring rolled unless alternate forming options can demonstrate the final product exhibits acceptable metallurgical structure and mechanical properties in the rim/hub region.

5.3 Blind Flanges and Spectacle Plates

Blind flanges shall be manufactured from forged material or from plates in accordance with the applicable Saudi Aramco Drawings, ASME B16.5 or ASME B16.47. Spectacle plates, spacers and slip blinds (blanks) shall be manufactured from forged material or from plates in accordance with the applicable Saudi Aramco Drawings and ASME B16.48. The minimum requirments for plates used in the fabrication shall be ASTM A516 Gr.70. The following additional requirements are applicable to the plate:

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5.3.1 The plate shall be 100% UT examined for laminations in accordance with ASTM A578. The acceptance level is C.

5.3.2 Plate materials shall comply with the requirements of NACE MR0175 / ISO 15156.

5.3.3 ASTM A516 plate, used for blind flanges, spectacle plates, blinds, and spacers, shall be tested as specified in ASTM A516 S2, S5, S12 and the required longitudinal Charpy V-notch impact values shall be 34/27 J (25/20 ft-lbs) for standard 10 mm by 10 mm specimens.

Commentary Note:

Impact test temperature is given in ASTM A20 Paragraph 12.1.5.

5.4 Heat Treatment

All flanges shall be furnace heat treated as indicated in Table 5 after all forge processing is complete. Cooling directly from forging temperature is not acceptable as a normalize heat treatment. Terms and definitions for heat treatment shall be in accordance with ASTM A941.

Any heating above the lower transformation temperature (A1) shall be recognized as eliminating any previous heat treat condition. Minimum temperature for tempering or precipitation hardening is 590ºC.

5.5 Chemical Requirements

Chemical analysis shall be performed upon each heat for all elements specified in the respective standards; including additional elements specified herein (see Table 5). Elements for which heat analysis data are not available may be determined by check or product analysis if necessary.

The composition limits of the respective standards in shall be met unless stated otherwise by this specification (see Table 5).

5.5.1 Heat Analysis

Heat Analysis is required for: Carbon, Manganese, Phosphorus, Sulfur, Silicon, Nickel, Chromium, Molybdenum, Copper, Niobium (Columbium), Vanadium, Titanium, Aluminum, and Boron. Analysis for Calcium and Nitrogen is also required when specified in the respective standards or in this specification.

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5.5.2 Check and Product Analysis

At least one check analysis or product analysis is required from each heat of steel used for the production of flanges. Such representative check analysis shall be made on raw material (ingot, billet, or bar) or products from each heat for all specified elements listed in Table 5 in accordance with ASTM A788 or A961, and the ASTM product specification, as applicable.

Specimens for check analysis shall be taken midway between the center and surface of the ingot, billet, or bar.

5.5.3 Carbon Equivalents

Maximum allowable values for carbon equivalent (CE), and carbon content (C) for finished flanges, are to be determined at the same location as mechanical tests in 5.6.1.

15 ) ( 5 ) ( 6 ) (CE C Mn Cr Mo V Ni Cu Equivalent Carbon        (1) Commentary Note:

CE determinations are based on heat analysis unless only check or product analysis data are available.

5.5.4 Pitting Resistance Equivalent (PRE)

Stainless steels grades with PRE requirements shall meet the minimum values shown in Table 5.

(PRE) = %Cr + 3.3 %Mo + 16 %N (2)

5.6 Mechanical Requirements

Mechanical testing of representative samples from each heat treat lot is required for acceptance of all flanges. Testing is to be in accordance with the appropriate ASTM/API standard and the additional requirements of this specification as shown in Table 5.

5.6.1 Samples for Mechanical Testing

Mechanical testing samples shall be taken from locations as described in ASTM A350, Section 7. Samples may be taken from either a sacrificial forging or a separately forged test bar, or a prolongation of the weld neck end or extension in the axial direction as applicable for swivel or lap rings. (Listed in order of preference).

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Where a separately forged test bar is used, it shall be from the same heat as the final forgings. The test bar shall receive the same approximate working, as documented in the product quality plan (see 4.4) and shall be heat treated with the flange forgings it represents. Separately forged test bars shall be at least 300 mm long, or they may be rings consistent with the production forgings. Transverse test specimens shall be at least 140 mm in a dimension transverse to the principal direction of hot working.

If for any reason a flange cannot be forged to near net shape, the section dimensions of the forged test specimen shall be ± 6.5 mm of the rim dimensions (T REF in Table 6) of the product in the as-forged condition (before machining).

Weld end prolongations (integral test rings) are allowed for ring-rolled flanges that are forged to “near-net-shape”, (within 6.5 mm of finished size), with the following limitations:

 Thickness must be the greater of 25 mm or the matching pipe wall, and must be large enough to allow removal of test specimens at least 140 mm long that are transverse to the principal direction of hot work;

 Prolongations must remain part of the production flange during heat treatment;

 Specimens from prolongations must be removed from the T/2 position;

 Prolongations are not permitted when the rim thickness is greater than 140 mm (5.50 in.) (“T REF” in Table 6), OR when flanges are not forged to near-net-shape.

When required on Saudi Aramco Inspection Requirements Form 175-022501, or there is definite reason to question the test results, the validity of any forged test blank will be confirmed by testing a

production flange of greatest rim thickness in the lot represented by the test bar. The validity of any forged test blank is normally verified during first time qualification of the manufacturing process.

5.6.2 Tension and Impact Tests

Tensile and impact testing shall be performed in accordance with ASTM A370.

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Material code A does not require impact testing. All other flanges shall be represented by tension test and Charpy V-notch specimens, as applicable in Table 5, with test axes transverse to the principal direction of hot work.

For Charpy V-notch on flanges 12 inches and less in diameter,

longitudinal specimens may be substituted if an additional 25 ft-lb are added to the minimum required toughness in Table 5.

For clarification, the axis of the Charpy V-notch shall be parallel to the principal direction of hot work.

Principle direction of hot work is defined as follows: a) Ring rolled flanges – Tangential to the bore.

b) All other flanges – Radial to the bore, except for prolongations which shall be tangential to the bore.

5.6.3 Hardness Tests

Finished flanges shall be tested by the standard Brinell method per ASTM E10, or other Saudi Aramco approved hardness measurement method, so that test values can be verified.

The test method shall provide accuracy and precision (demonstrated repeatability) equivalent to the standard Brinell test and shall produce results that can be cross-referenced to standard Brinell values.

Impressions shall be on either the side of the flange rim or on the outer diameter, mid-way between bolt hole locations. Every flange and test ring shall be tested at two locations 180 degrees apart.

Report all values; see Table 5 for acceptance values. The highest and lowest values from the same test lot, test specimens included, shall not differ by more than 30 HB, or the entire lot is rejected. Re-testing after re-heat treatment is required.

6 Corrosion Tests

6.1 All austenitic stainless steel grades except those specified in Table 2 shall be subjected to intergranular corrosion test as per ASTM A262 Practice E. Requirement for sensitization of samples shall be as specified in ASTM A262 except that sensitization heat treatment is not required for grades having more that 3% Mo.

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6.2 Intergranular Corrosion test specified in paragraph 6.1 above is not required for heats having less than 0.020% carbon as shown in product analysis.

6.3 Special grades of stainless steel grades shall be subject to corrosion testing as specified in Table 2.

Table 2 – Corrosion Tests for Special Grades of Stainless Steel

Steel Grade Corrosion Test Test Conditions Acceptance Criteria UNS N08904

(F 904L)

ASTM G48 Method A

Test temperature: 25°C Test duration : 24 hours

No pitting at 20X magnification Weight loss shall be less than 4.0 g/m2. UNS S31254 (F 44) ASTM G48 Method A Test temperature: 50°C Test duration : 24 hours

No pitting at 20X magnification Weight loss shall be less than 4.0 g/m2.

UNS S32205 (F 60)

ASTM A923

Method C As per ASTM A923 As per ASTM A923 UNS S32750

(F 53)

ASTM A923

Method C As per ASTM A923 As per ASTM A923 UNS S32760

(F 55)

ASTM A923

Method C As per ASTM A923 Same as UNS S32750 Notes:

a. The internal and external surfaces of the specimens shall be in the “as delivered” condition unless stated otherwise in the applicable standard.

b. Cut edges shall be prepared according to ASTM G48. c. Rapid screening test shall not be used as an acceptance test.

7 Metallographic Examination

7.1 Grain size shall meet the size requirements of Table 5 or finer as determined in accordance with ASTM E112.

7.2 Ferrite content for duplex stainless steels shall be between 35 to 55% as determined in accordance with ASTM E562.

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8 Extent of Testing and Inspection

The extent of testing and inspection to be performed shall be as per Table 3. Table 3 – Number of Tests Required for Chemical and Mechanical Testing

Type of Test Number and Frequency of Testing Chemical composition – Heat One per heat

Chemical composition – Product One per heat

Tensile One per lot

Impact One set per lot

Hardness 100% for the following sizes and larger: ASME/ANSI Class 150 - 26” Class 300 - 26” Class 400 - 30” Class 600 - 16” Class 900 - 12” Class 1500 - 6” Class 2500 - 4” API 6A Type 6B 2000 psi 16 3/4” 3000 psi 13 5/8” 5000 psi 5 1/8” For all other sizes: Sample as per Table 1

Corrosion testing One per lot

Metallography – Grain size (GS) One per lot Metallography – Ferrite content One per lot

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9 Non-Destructive Examinations (NDE)

Non-destructive examinations shall be conducted as described in the following subsections.

Special configuration flanges, such as pipe line anchors, swivel ring and lap joint weld ends, and long weld neck flanges, shall be tested according to approved Manufacturer's procedures.

Test specimens shall be identified and traceable to test reports.

If an unacceptable imperfection or rejectionable indication is found on any test sample the entire lot shall be tested.

9.1 Magnetic Particle Testing – Ferromagnetic Materials

All accessible surfaces shall be magnetic-particle tested after final heat treatment and final machining operations by a wet fluorescent method in accordance with ASTM A508/A275. Flange bores and other surfaces shall be inspected in two directions: axial and circumferential.

Acceptance criteria shall be in accordance with ASTM A788 Supplementary Requirement S18.

9.2 Liquid Penetrant Testing – Non-ferromagnetic Materials

All accessible surfaces shall be liquid-penetrant inspected after final heat treatment and final machining operationsin accordance with procedures specified in ASTM E165.

Acceptance criteria shall be in accordance with ASTM A788 Supplementary Requirement S19.

9.3 Ultrasonic Testing

Ultrasonic Testing (UT) shall be conducted on flanges in accordance with the following requirements:

Testing shall be conducted from the welding end before beveling, in an intermediate-machined state, with welding and sealing ends machined at right angles to the bore. However, intermediate-machined state UT inspection is not required if the intended UT procedure can demonstrate, and document, that adequate inspection reliability of the welding end can be achieved without intermediate stage testing.

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9.3.1 Straight-Beam Examination

Test flanges in accordance with ASTM A388/A788.

ASTM A788 supplementary requirement S20 Level DA applies, except that the flat bottom hole for test sections up to 300 mm will not exceed 4 mm diameter, and the flat bottom hole for sections 300 mm to 450 mm will not exceed 6.5 mm diameter.

Acceptance criteria:

 A forging containing one or more indications equal in amplitude to that of the applicable reference hole, when properly corrected for distance, is subject to rejection.

 Multiple indications with an amplitude exceeding 50% of the indication from the calibration hole, accompanied by a loss of back reflection exceeding 50%, shall also be cause for rejection.

9.3.2 Angle-Beam Examination

Test flanges in accordance with ASTM A388/A508. Search areas will consist of:

 100% of the volume of the bore to a radial depth not less than the wall thickness of the matching pipe; and

 100% of the volume of the cone, or the volume of material contained within 50 mm of the welding end, whichever is less.

Acceptance criteria:

Recordable indications per ASTM A388 will be cause for rejection. 9.4 Extent of Testing and Inspection for NDE

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Table 4 – Number of Tests Required for NDE

Type of Test Number and Frequency of Testing MT 100% for the following classes:

API 6A, all ratings

ASME/ANSI Class 900 and larger

Table 1 for all other classes

PT Same as MT

UT 100% for the following sizes and larger: ASME/ANSI Class 600 - 26” Class 900 - 20” Class 1500 - 10” Class 2500 - 6” API 6A Type 6B 2000 psi 16 3/4” 3000 psi 13 5/8” 5000 psi 5 1/8”

Table 1 for all other sizes

10 Special Machine Finish for Raised Face (RF) Flanges

As-machined roughness of the raised face shall be 3.2 to 6.4 micro-meters Ra;

see ASME/ANSI B46.1. Stockists shall not be permitted to remachine the sealing face of any flange, especially prior to marking.

Smoother surface finish not exceeding 3.2 µm Ra may be specified in special cases and shall be clearly indicated in the purchase order.

Commentary Note:

It is not permissible for any Stockist or Contractor to remachine, thus changing the configuration, any flange and remark the flange as a new product. For example, a Stockist is not permitted to remachine the sealing face from ring joint to flat face, or vice versa, and mark or remark the flange for a different service. This would be considered counterfeit material. The original manufacturer is the only company permitted to machine and mark flanges covered by this specification.

11 Repairs

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12 Markings

All flanges shall be marked by the manufacturer by metal stamping; low stress stamps are not required if markings are confined to the outer diameter of the rim (the curved surface).

The marking requirements of the respective ASTM and API standards apply to all flanges, subject to the further requirements of this specification.

The Manufacturer shall be identified on all flanges. Pipe size and bore (Schedule, XS, etc.) shall show on all flanges. The API monogram is not mandatory for API SPEC 6A Type 6B flanges, but “API” shall show on all flanges. The material standard shall show on all flanges. Vendor markings shall be included in all Quality Plans.

Only one strength level is permitted on a single flange, for example: “F60/F75” is prohibited.

Markings shall be in the following order when possible:

 Descriptive Acronym for flange type

 Pressure Rating

 Nominal Size and Bore Diameter (Schedule, XS, etc.)

 Dimensional Standard

 Strength Marking per Table 6

 Heat Treatment per Table 5

 Material Standard and Supplementary Requirements per Table 5

 “LO TEMP” or “API,” when applicable

 Non-Destructive Test Markings

 Ring Joint Gasket Number, when applicable

 Manufacturer's Name (first 3 letters or logo)

 Heat Number or Manufacturer's Heat Identification Examples (See Notes)

 WNRF 30 NPS 29.000 BORE CL150 F36 N A266 CL4 S2 S4

 RF 12 NPS SCH 20 ANSI CL300 GRB N ASTM A350 LF2LT MT

 WNRJ 7-1/16 - 5.76 BORE API 3000 60K N A707 L3 CL3 MT UT

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 RF 24 NPS SCH 40 B16.5 CL150 GRB N A105 S4 MT

 RJ 9 - 7.44 BORE API 3000 60K N A707 L3 CL3 MT UT

 RJ 10 NPS 8.500 BORE CL1500 F60 QT A707 L3 CL3 MT

Markings for “inseparable” swivel ring and lapped joint assemblies per Saudi Aramco Standard Drawings shall be located on the rims of the backing flanges (swivel rings), with welding end information first.

Examples:

 SRRJ WLD END 24 NPS 23.250 BORE AA-036792 CL600 F60 QT ASTM A707 L3 CL3 LO TEMP UT MT BKG FLG A694 F60

 LJRJ WLD END 36 NPS 35.250 BORE AC-036443 CL600 A707 L3 CL3 UT MT BKG FLG A694 F60.

Commentary Note:

Common recognizable abbreviations are acceptable: RF= weld neck raised face; RJ = weld neck, ring joint; SRJ = Swivel Ring, Ring Joint; LRJ = Lapped Joint Ring Joint; RF = WNRF; RJ = WNRJ; LT = LO TEMP. “ASTM” & “BORE” may be dropped: LF2 = ASTM A350 LF2, A105 = ASTM A105, L3CL3LT = ASTM A707 L3 CL3 LO TEMP, CL600 = ANSI CL 600, MT = magnetic particle, B16.5 = ANSI B16.5.

13 Protective Coatings and Packaging

Finish-machined and tested flanges shall be coated overall with a protective finish that does not hide markings.

13.1 Coatings shall be capable of protecting against corrosion in a marine

environment for 6 months. If the protective coating cannot be warranted against corrosion, the flanges shall be protectively packaged.

13.2 All flanges shall be protected from mechanical damage. Welding ends and sealing faces shall be protected with suitable wood or plastic or metal covers. Flanges shall be packaged in steel-banded wooden crates or secured to skids. 13.3 The coating shall be suitable for welding as required by ASTM A961, or an

acceptable alternate shall be employed as shown below:

13.3.1 An additional separate strippable coating may be applied over the welding ends and sealing surfaces. The strippable coating need not be weldable but shall be capable of easy removal without special tools or solvents, and shall not leave residue that will interfere with welding or gasket seating. Examples: filled high-build vinyl or urethane or PVC, OR

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13.3.2 The Manufacturer may apply tape to the welding ends and sealing surfaces then seal the tape with a protective coating. Tape shall be easily removed and leave no residue that interferes with welding or gasket seating.

Table 5 – Materials and Manufacturing Limits

ANSI/ASME Flanges (4)

Strength Marking B, F36 B, F36 B, F36 B, F36 B, F36

ASTM # A105 A350 A350 A266 A266

Grade B LF2 LF2 2 4 Class --- 2 1 --- --- Material Code A B C (LT) D E C * * * * * Mn * * * * * P 0.020 0.020 0.020 0.020 0.020 S 0.015 0.015 0.015 0.015 0.015 Si * * * * * Ni * * * * * Cr * * * * * Mo * * * * * Cu * * * * * Nb/Cb --- * * * * V * * * * * N * * * * * B 0.0005 0.0005 0.0005 0.0005 0.0005 Ca 0.005 0.005 0.005 0.005 0.005 CE 0.43 0.43 0.43 0.43 0.43 Supplemental Requirements S2.1 S4.3 S6.3 S6.3 S2 & S9 S2, S9 & S13 UTS ksi * * * * * YS ksi * * * * * Elong (%) * * * * * Red. (Area %) * * * * * Test Temp. * * * * -45 °C CVN avg/min * * 25/20 ft-lb (34/27 J) * 25/20 ft-lb (34/27 J) Hardness (HB) - max. 187 197 197 137-197 137-197 Heat Treat Normalize Normalize Normalize Normalize Normalize

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Notes: (1) CE is the carbon equivalent calculated as in paragraph 5.5.3.

(2) Meets or exceeds API SPEC 6A Type 6B PSL2, material class DD & EE, temperature rating L. For temperatures above 120°C see API SPEC 6A, Appendix G.

(3) Meets API SPEC 6A minimum tensile requirement for class 3000, 5000 and 10,000. (4) Normal ASTM requirements are designated by an asterisk ( * ) while specific Saudi Aramco

requirements are identified.

(5) Manufacturer’s choice of heat treatment (not for weld neck flanges). For only swivel ring or lapped joint backing flanges.

(6) Other ASTM composition restrictions apply as appropriate. (7) The grain size shall be equal or finer.

(8) Analysis of boron is not required for blind flanges, lap joint flanges and swivel rings (i.e., outer rings).

ANSI/ASME Flanges (4) API Flanges(2)(4)

Strength Marking F60 F60 F60 F65 F65 F70 F60

ASTM # A350 A707 A707 A859 A350 A707 A707

Grade LF6 L3 L5 A LF787 L5 L3 Class 2 3 3 2 3 4 3 Material Code J (LT) J (LT) K (LT) L (LT) L (LT) M (LT) API SPEC 6A J (LT) C * * * * * * * Mn * * * * * * * P 0.020 0.020 0.020 0.020 0.020 0.020 0.020 S 0.015 0.015 0.015 0.015 0.015 0.015 0.015 Si * * * * * * * Ni * * * * * * * Cr * * * * * * * Mo * * * * * * * Cu * * * * * * * Nb/Cb * * * * * * * V * * * * * * * N * * * * * * * B 0.0005 0.0005 0.0005 0.0005 0.0005 0.0005 0.0005 Ca 0.005 0.005 0.005 0.005 0.005 0.005 0.005 CE 0.43 0.43 --- --- --- --- 0.43 Supplemental Requirements S6.3 S3.3 --- --- S1 --- S3.3 UTS ksi * * * * * 90 - 110 85 – 105 (3) YS ksi * * * * * 75 - 90 * Elong. (%) * * * * * * * Red. (Area %) * * * * * * * Test Temp. * * * * S1.1.1 * * CVN avg/min 50/40 ft-lb (68/54 J) 50/40 ft-lb (68/54 J) 50/40 ft-lb (68/54 J) 50/40 ft-lb (68/54 J) 50/40 ft-lb (68/54 J) 50/40 ft-lb (68/54 J) 50/40 ft-lb (68/54 J) Hardness (HB) – max. 197 207 207 207 197 207 207

Heat Treat Q & T Q & T QPH QPH QPH QPH Q & T

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Notes: (1) CE is the carbon equivalent calculated as in paragraph 5.4.3.

(2) Meets or exceeds API SPEC 6A Type 6B PSL2, material class DD & EE, temperature rating L. For temperatures above 120°C see API SPEC 6A, Appendix G.

(3) Meets API SPEC 6A minimum tensile requirement for class 3000, 5000 and 10,000. (4) Normal ASTM requirements are designated by an asterisk ( * ) while specific Saudi Aramco

requirements are identified.

(5) Swivel rings shall match the strength of the swivel rings. (6) Other ASTM composition restrictions apply as appropriate. (7) The grain size shall be equal or finer.

(8) Analysis of boron is not required for blind flanges, lap joint flanges and swivel rings (i.e., outer rings).

ANSI/ASME Flanges (1) (2)

ASTM # A182 A182 A182 A182

Grade F 11 F 22 F 5 F 9

Class 2 3 n/a n/a

C * * * * Mn * * * * P * * * * S * * * * Si * * * * Ni * * * * Cr * * * * Mo * * * * Cu * * * * Nb/Cb * * * * V * * * * N * * * * B * * * * Ca * * * *

CE n/a n/a n/a n/a

Supplemental Requirements - - - - - - - - - - - - UTS KSI * * * * YS KSI * * * * Elong. (%) * * * * Red. Area * * * * Test Temp. * * * * CVN (avg/min) * * * * Hardness (HB) * * * *

Heat Treat N & T N & T N & T N & T

ASTM GS * * * *

Notes:

1) Normal ASTM requirements are designated by an asterisk ( * ) while specific Saudi Aramco requirements are identified.

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ASTM # A182 A182 A182 A182 A182 A182

Grade F304L F309 F310 F316L F321 F347

Class n/a n/a n/a n/a n/a n/a

C * * * * * * Mn * * * * * * P * * * * * * S * * * * * * Si * * * * * * Ni * * * * * * Cr * * * * * * Mo * * * * * * Cu * * * * * * Nb/Cb * * * * * * V * * * * * * N * * * * * * B * * * * * * Ca * * * * * *

CE n/a n/a n/a n/a n/a n/a

PRE(3) - - - - - - - - - 25.5 - - - - - - Supplemental Requirements S4 S4 S4 S4 S4 & S10 S4 & S10 UTS KSI * * * * * * YS KSI * * * * * * Elong. (%) * * * * * * Red. Area * * * * * * Test Temp. * * * * * * CVN (avg/min) * * * * * * Hardness (HB) * * * * * * Heat Treat * * * * * * ASTM GS (min) * * * * * * Notes:

2) Other ASTM composition restrictions apply as appropriate.

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ASTM # A182 A182 A182 A182 A182 B462 Special(5)

Grade F 44 S31254 F 904L N08904 F 60 S32205(4) F 53 S32750 F 55 S32760 Alloy 20 N08020 Per agreement

Class n/a n/a n/a n/a n/a n/a *

C * * * * * * * Mn * * * * * * * P * * * * * * * S * * * * * * * Si * * * * * * * Ni * * * * * * * Cr * * * * * * * Mo * * * * * * * Cu * * * * * * * Nb/Cb * * * * * * * V * * * * * * * N * * * * * * * B * * * * * * * Ca * * * * * *

CE n/a n/a n/a n/a n/a n/a n/a

PRE(3) 42 34 35 42 42 * * Supplemental Requirements - - - - - - - - - - - - - - - S1 Practice E - - - UTS KSI * * * * * * * YS KSI * * * * * * * Elong. (%) * * * * * * * Red. Area * * * * * * * Test Temp. * * -40°C -40°C -40°C * * CVN avg/min * * 40 ft-lb (54 J) min. 40 ft-lb (54 J) min. 40 ft-lb (54 J) min. * * Hardness max. 35 HRC * 28 HRC 32 HRC 32 HRC * * Heat Treat * * * * * * *

ASTM GS (min) n/a n/a n/a n/a n/a n/a n/a

Notes:

2) Other ASTM composition restrictions apply as appropriate.

3) Minimum Pitting Resistance Equivalent (PRE) = %Cr+3.3 %Mo+16 %N

4) Standard DSS with approximately 22% Cr shall be specified as UNS S32205 or as dual certified UNS S31803/S32205 or F51/F60.

5) Requires the approval of the Chairman of the Materials and Corrosion Control Standards Committee. 6) HRC refers to Rockwell C hardness scale.

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Table 6 – Material Codes and Manufacturing Limits CLASS 150 NPS T REF B, F36 F60 F65 F70 1-½ 0.69 ABCD J L M 2 0.75 “ “ “ “ 2-½ 0.88 “ “ “ “ 3 0.94 “ “ “ “ 3-½ 0.94 “ “ “ “ 4 0.94 “ “ “ “ 6 1.00 “ “ “ “ 8 1.12 “ “ “ “ 10 1.19 “ “ “ “ 12 1.25 “ “ “ “ 14 1.38 “ “ “ “ 16 1.44 “ “ “ “ 18 1.56 “ “ “ “ 20 1.69 “ “ “ “ 22 1.81 “ “ “ “ 24 1.88 “ “ “ “ 26 2.69 BCE “ “ “ 28 2.81 “ “ “ “ 30 2.94 “ “ “ “ 32 3.19 “ “ “ “ 34 3.25 “ “ “ “ 36 3.56 “ “ “ “ 38 3.81 “ “ “ “ 40 4.06 “ “ “ “ 42 4.25 “ “ “ “ 44 4.44 “ “ “ “ 46 4.62 “ “ “ “ 48 4.81 “ “ “ “ 50 4.38 “ “ “ “ 52 4.56 “ “ “ “ 54 4.75 “ “ “ “ 56 4.88 “ “ “ “ 58 5.06 “ “ “ “ 60 5.19 “ “ “ “ Notes:

SR792 indicates Swivel ring flanges per AA-036792.

LJ438, LJ443 and LJ486 indicate Lap joint flanges per AE-036438, AC-036443 and AC-036486 respectively.

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Table 6 – Material Codes and Manufacturing Limits CLASS 300 NPS T REF B, F36 F60 F65 F70 ** ** 1-½ 0.81 ABCD J L M - - - - - - 2 0.88 “ “ “ “ - - - - - - 2-½ 1.00 “ “ “ “ - - - - - - 3 1.12 “ “ “ “ - - - - - - 3-½ 1.19 “ “ “ “ - - - - - - 4 1.25 “ “ “ “ - - - - - - 6 1.44 “ “ “ “ SR792 - - - 8 1.62 “ “ “ “ J - - - 10 1.88 “ “ “ “ “ - - - 12 2.00 “ “ “ “ “ - - - 14 2.12 “ “ “ “ “ - - - 16 2.25 “ “ “ “ “ - - - 18 2.38 “ “ “ “ “ - - - 20 2.50 “ “ “ “ “ - - - 22 2.62 “ “ “ “ “ - - - 24 2.75 BCE “ “ “ “ - - - LJ486 26 3.12 “ “ “ “ “ J 28 3.38 “ “ “ “ “ “ 30 3.62 “ “ “ “ “ “ 32 3.88 “ “ “ “ “ “ 34 4.00 “ “ “ “ “ “ 36 4.12 “ “ “ “ “ “ 38 4.31 “ “ “ “ “ “ 40 4.50 “ “ “ “ “ “ 42 4.62 “ “ “ “ “ “ 44 4.75 “ “ “ “ “ “ 46 4.88 “ “ “ “ “ “ 48 5.12 “ “ “ “ “ “ LJ438 50 5.50 “ K “ “ - - - 52 5.68 “ “ “ “ - - - 54 6.00 “ “ “ “ J 56 6.06 “ “ “ “ - - - 58 6.25 “ “ “ “ - - - 60 6.44 “ “ “ “ J Notes:

LJ438, LJ443 and LJ486 indicate Lap joint flanges per AE-036438, AC-036443 and AC-036486 respectively. Material codes, such as A, B and C, are identified in Table 5.

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Table 6 – Material Codes and Manufacturing Limits CLASS 400 NPS T REF F36 F60 F65 F70 30 4.00 BCE J L M 32 4.25 “ “ “ “ 34 4.35 “ “ “ “ 36 4.50 “ “ “ “ 38 4.75 “ “ “ “ 40 4.88 “ “ “ “ 42 5.12 “ “ “ “ 44 5.38 “ K “ “ 46 5.62 “ “ “ “ 48 5.88 “ “ “ “ 50 6.19 - - - “ - - - - - - 52 6.38 - - - “ - - - - - - 54 6.69 - - - “ - - - - - - 56 6.88 - - - “ - - - - - - 58 7.00 - - - “ - - - - - - 60 7.30 - - - “ - - - - - -

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Table 6 – Material Codes and Manufacturing Limits CLASS 600 NPS T REF B, F36 F60 F65 F70 ** ** 1-½ 0.88 ABCD J L M - - - - - - 2 1.00 “ “ “ “ - - - - - - 2-½ 1.12 “ “ “ “ - - - - - - 3 1.25 “ “ “ “ - - - - - - 3-½ 1.38 “ “ “ “ - - - - - - 4 1.50 “ “ “ “ - - - - - - 6 1.88 “ “ “ “ - - - - - - SR792 8 2.19 “ “ “ “ J - - - 10 2.50 “ “ “ “ “ - - - 12 2.62 BCE “ “ “ “ - - - 14 2.75 J “ “ “ - - - 16 3.00 “ “ “ “ “ - - - 18 3.25 “ “ “ “ “ - - - 20 3.50 “ “ “ “ “ - - - 22 3.75 “ “ “ “ “ - - - 24 4.00 “ “ “ “ “ - - - LJ443 26 4.25 “ “ “ “ “ J 28 4.38 “ “ “ “ “ “ 30 4.50 “ “ “ “ “ “ 32 4.62 “ “ “ “ “ “ 34 4.75 “ “ “ “ “ “ 36 4.88 “ “ “ “ “ “ 38 5.12 “ K “ “ “ “ 40 5.38 “ “ “ “ “ “ 42 5.50 “ “ “ “ “ “ 44 5.69 “ “ “ “ K “ 46 5.75 “ “ “ “ “ “ 48 6.50 “ “ “ “ “ “ 50 7.75 - - - “ - - - - - - - - - - - - 52 8.00 - - - “ - - - - - - - - - - - - 54 8.25 - - - “ - - - - - - - - - - - - 56 8.56 - - - “ - - - - - - - - - - - - 58 8.75 - - - “ - - - - - - - - - - - - 60 9.19 - - - “ - - - - - - - - - - - - Notes:

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Table 6 – Material Codes and Manufacturing Limits CLASS 900 NPS T REF B, F36 F60 F65 F70 ** 1-½ 1.25 ABCD J L M - - - 2 1.5 “ “ “ “ - - - 2-½ 1.62 “ “ “ “ - - - 3 1.50 “ “ “ “ - - - 4 1.75 “ “ “ “ - - - SR792 6 2.19 “ “ “ “ - - - 8 2.50 BCE “ “ “ J 10 2.75 “ “ “ “ “ 12 3.12 “ “ “ “ “ 14 3.38 “ “ “ “ “ 16 3.5 “ “ “ “ “ 18 4.00 “ “ “ “ “ 20 4.25 “ “ “ “ “ 22 5.00 “ “ “ “ 24 5.50 “ “ “ “ “ 26 5.50 “ K “ “ “ 28 5.62 “ “ “ “ “ 30 5.88 “ “ “ “ K 32 6.25 “ “ - - - - - - “ 34 6.50 “ “ - - - - - - “ 36 6.75 “ “ - - - - - - “ 38 7.50 - - - “ - - - - - - - - - 40 7.75 - - - “ - - - - - - - - - 42 8.12 - - - “ - - - - - - - - - 44 8.44 - - - “ - - - - - - - - - 46 8.88 - - - “ - - - - - - - - - 48 9.19 - - - “ - - - - - - - - - Notes:

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Table 6 – Material Codes and Manufacturing Limits CLASS 1500 NPS T REF B, F36 F60 F65 F70 ** 1-½ 1.25 ABCD J L M - - - 2 1.50 “ “ “ “ - - - 2-½ 1.62 “ “ “ “ - - - 3 1.88 “ “ “ “ - - - 4 2.12 “ “ “ “ - - - 6 3.25 BCE “ “ “ - - - SR792 8 3.62 “ “ “ “ J 10 4.25 “ “ “ “ “ 12 4.88 “ “ “ “ “ 14 5.25 “ K “ “ “ 16 5.75 “ “ “ “ “ 18 6.38 “ “ “ “ K 20 7.00 “ “ “ “ “ 22 7.00 “ “ “ “ “ 24 8.00 “ “ “ “ “ 26 Special - - - “ “ “ - - - 28 “ - - - “ “ “ - - - 30 “ - - - “ “ “ - - - Notes:

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Table 6 – Material Codes and Manufacturing Limits CLASS 2500 NPS T REF B, F36 F60 F65 F70 1-½ 1.75 ABCD J L M 2 2.00 “ “ “ “ 2-½ 2.25 “ “ “ “ 3 2.62 BCE “ “ “ 4 3.00 “ “ “ “ 5 3.62 “ “ “ “ 6 4.25 “ “ “ “ 8 5.00 “ “ “ “ 10 6.50 “ “ “ “ 12 7.25 “ “ “ “

Note: Material codes, such as A, B and C, are identified in Table 5.

Revision Summary

7 September 2009 New Saudi Aramco Materials System Specification. 19 April 2010 Editorial revision to add paragraphs 4.2 and 4.3. 21 June 2011 Minor revision.

9 January 2013 Minor revision.

15 June 2013 Editorial revision to correct typo error (referenced paragraph was changed from 5.4.3 to 5.5.3).