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Data-sheet-for-nace-pipe-flange-fitting-for-SOUR-service
Nace sour service pipe, flange, fitting which have special PREN and pitting corrosion testing requirements.
we produced series of sour service pipe, duplex sour service elbow, sour service tee, and weldolet for OMAN
oil company, all these high PREN duplex material pass customer ASTM G48 testing requirements.
4.1 General
4.1.1 Pipeline flanges shall be designed, manufactured, inspected, tested, marked and supplied in accordance with ISO 15590-3, ASME B16.5 and this requisition & specification.
4.1.2 End preparation shall be bevelled to ASME B31.4.
4.1.3 The pipeline flanges (Item No. 1, 2, 3, 4) shall be suitable for the design conditions specified in Appendix
II.
4.1.4 The Pipeline Flanges (Item No. 1) shall be suitable for pigging operation with intelligent and maintenance
pigs.
4.2 NACE Requirement
All pipeline flange materials shall comply with the NACE requirements as per NACE MR0175 / ISO –
15156 and this specification and requisition.
4.3 Additional Requirements
4.3.1 Flanges shall be manufactured in accordance with a documented MPS. Manufacturing shall not proceed
until the MPS has been accepted / approved by Company.
4.3.2 The flanges shall be supplied with the ID (i.e. Bore) as specified in the data sheet(s).
4.3.3 Dimensions and tolerances of flanges shall be in accordance with ASME B16.5 as applicable.
4.3.4 The outside diameter, thickness and drilling templates of flanges shall be in accordance with ASME
B16.5.
4.3.5 All flanges shall be coated (externally / internally) with factory standard rust preventive temporary coating
to prevent corrosion during transit. All machined surfaces shall be suitably coated to prevent corrosion
and protected against damage during transport, storage and installation.
4.3.6 All the bevelled ends of flanges shall be protected by bevel protectors which shall be approved by
company. Face of flange shall be protected with hard cover plates to protect face against damage.
4.3.7 No repair shall be permitted to flange(s) that have failed any of the tests outlined in this specification &
requisition.
4.3.8 Test rings of same size (each 500 mm length) shall be supplied along with flanges as identified in the
scope of supply. Test rings shall be in similar condition as of flanges and same heat number. Machined
steel test rings and threaded flanges are not acceptable.
4.3.9 Vendor shall comply with the hardness requirements mention in ISO 15590-3.
4.3.10 The steel used to manufacture flanges shall be suitable to weld to pipe manufactured to API 5L and
fittings manufactured to ISO 15590-2/ISO 15590-3/ASME B16.9/MSS SP-97 & flanges manufactured to
ASME B16.5. Vendor shall ensure weldability of supplied flanges by providing previous weldability
records of similar materia
Notes: –
1. This Data Sheet shall be completely filled by Manufacturer / Principal in Vendor response column,
stamped and signed for acceptance. Quotation without this data sheet shall not be acceptable.
2. Material requirement shall comply with the “Piping Material Narratives” (BST-GEN-PIP-SPC- WPO-000-00002-00).
3. The following requirements of 22Cr DSS material shall be met:
PREN is minimum 34
Nitrogen content is minimum 0.14% Corrosion pitting test in accordance of ASTM G48, method A at 25 °C
Application of DSS is limited to -50 °C and 40 mm maximum thickness
4. Marking shall include nominal pipe size (DN), schedule number or wall thickness, charge number (heat number) and, where applicable, the heat treatment batch number. Marking shall comply with all requirements of ASTM A815.
5. If sour service is specified, marking shall also include the identification “SOUR” behind the ASTM designation
6. Prior to dispatch/shipment all Fittings shall be supplied with Bevelled ends. All Fittings shall be protected against damage by plastics pipe, flange, fittings/ wooden shields face protectors and bevelled ends to be protected by bevel protectors and shall be suitable to prevent damage during transportation. The packing shall be sturdy, as transportation has to be in desert environment on graded roads.
7. Vendor shall submit along with quotation the reference list of past supplies to OOCEP or other international oil producing companies for similar Fittings to get confidence about the product.
8. Pickling and passivation shall be done in accordance with ASTM A 380.
9. SOUR Service Requirements:-
All materials specified for sour service shall, as a minimum, meet the requirements of NACE ISO 15156,edition/addenda as on 23rd January 2018
Duplex Stainless Steel material maximum hardness 29HRC (290 HV10)
10.Marking
10. MARKING AND COLOR CODING
10.1 MARKING OF PIPING MATERIALS
Marking shall generally be accomplished by either one or a combination of casting-out,forging-out, punching, stenciling, tagging, labeling and taping. Punching or die stamping,if used shall be low stress stamps (dot or round bottomed) with at least 6 mm high. Stenciling color shall be black; however, for piping components whose surfaces are black or dark, it shall be white.
10.1.1 PIPES
Marking on pipes shall be in accordance with the applicable ASTM number. Pipes specified as Sour shall be marked with “SOUR” behind the ASTM
designation. If pipe is specified by wall thickness (instead of by schedule), then the wall Thickness in millimeters shall be included in the marking.
10.1.2 FLANGES
Marking on flanges shall be in accordance with the MSS SP-25, ASME B16.5 / B16.47, applicable ASTM number. Marking shall include the pipe schedule number or nominal thickness in millimeter.
10.1.3 FITTINGS
Marking on fittings shall be in accordance with the ASME B16.9, applicable ASTM Number. Fittings specified as Sour shall be marked with “SOUR” behind the ASTM designation. For Branch fittings, marking shall be in accordance with MSS SP-25. For Branch outlet fittings, marking shall be in accordance with MSS SP-97.
10.1.4 GASKETS
Marking on all gaskets shall be as per the requirements mentioned in ASME B16.20
10.2 COLOR STANDARD
BS 381C color standard shall be used. For piping commodities, which require PMI (Positive Material Identification), Marking and color-coding shall be done only after the successful completion of PMI on the final product. Paint shall be resistant to salt water atmosphere and tropical climate, and be durable
and of a distinctive identifying color. It shall not cause corrosion of the material to which it is applied, neither during storage and construction, nor during operation of the equipment. Paints and markers shall not contain harmful metals or metal salts such as Zinc Aluminum, Lead or Chlorides, sulphur or other halogens that may be harmful to the alloy. Color coding marks shall not obliterate any other markings required by COMPANY General Specifications, International Standards, codes, applicable local laws and regulations.
C&N range: | elbows | tee | cross | reducers | bend | caps | coupling | plug | nipple | olet | clamps | Thread fittings | | Butted weld fittings | socket fittings | | Flanges : slip on | weld neck WN | orifice | blind | thread | socket weld | SAE | reducing | Ring Joint Flanges | |Seamless steel pipe | weld steel pipe Limited will particpate.