AWHEM Review Specification for Wellhead and Christmas Tree Equipment ANSI/API 6A/ISO 10423-2003 (19 th Edition) Technical Report TR0501 April 20, 2005 AWHEM publications may be used by anyone desiring to do so. Every effort has been made by the Association to assure the accuracy and reliability of the data contained in them; however, the Association makes no representation, warranty, or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal, state or municipal regulation with which this publication may conflict. Association of Well Head Equipment Manufacturers Post Office Box 1166 Bellaire, Texas 77401
Introduction: This review document is separated into two sections. First section is a general overview to highlight major document restructure, formatting, terminology and major changes, supplemented with a detailed listing of changes by clause, annex and table. The detailed listing includes a Comments Column which can be utilized to record comments. General Overview API Foreword re-written and there is a now a new ISO Introduction. Some original paragraph numbers have changed; however, many still align with the 17 th Edition. Table numbers have changed and all of the tables with US customary dimensions are now located in the Annexes. The term is now used instead of Section. The word When has replaced the use of the word if. The new 6A no longer has Appendices. The new term is Annex. All previous (old) Appendices were identified in the front of the book as non-mandatory. The new Annexes are instead identified as either Informative or Normative. Informative Annexes are as the name implies for information purposes, while Normative annexes are mandatory for compliance. Back-pressure valves, bull plugs, valve-removal plugs, hubs, pressure-boundary penetration, running and test tools, and wear bushings added to the document scope. NACE MR0175/ISO 15156-1 replaces NACE MR-0175:1999 Valves considered safety valves must be tested to PR2 levels Added Temperature Class N: -50 o F to 140 o F (-46 o C to 60 o C) Added partial pressure stamping for DD, EE, FF and HH material classes (NL required if no limit) Added material class ZZ for proven history sour-service applications outside of NACE PSL 1 material requires quenching practice and cooling media now be reported Removed minimum lateral expansion requirements for PSL 4 materials. Added Nickel alloy UNS N08825 to allowable ring gasket materials Removed quenching requirements for heat treatment of ring gaskets Added Rockwell to allowable methods of hardness testing of test coupons. Removed all other allowable testing for CRA materials for test coupons. ER for PSL 4 not required to exceed 5 in (was 10 in) No fabrication welding allowed on bull plugs or valve-removal plugs No repair welding of valve-removal plugs, bull plugs or back-pressure valves Maximum pressure measuring devise calibration increment interval now 3 months Added EN 473 to allowable NDE / visual personnel specifications Added visual examination requirements for preparation of PSL 3 and PSL 4 pressure containing welds Repair weld requirements for PSL 3 shall be identical to the requirements for PSL 2. Test pressure for all 5,000 PSI rated working pressure equipment now 7,500 PSI Added designation PSL 3G for gas-tested valves Dimensional verification sampling states all suspension, lift and back-pressure valve threads or retention profiles shall be gauged. Marking shall contain the designation ISO 10423 or 6A. Stamp SST instead of CRA for austenitic stainless steel weld metal overlay. Removed centre-to-centre marking, valve and bore identification number, and reference centerline marking for multiple bore valves. Valve-removal threads in bowls and spools shall be in accordance with Annex L. Added trapped pressure venting requirements for test, vent, injection and gauge connectors, lock screws, alignment pins, retaining screws and top connections. Added recommended top connection dimensions in Annex K Top connections assemblies shall be equipped with a bleeder plug for shipment Annex J withdrawn for Repair and Remanufacture Requirements. Page 2 of 21
Table 1: Annexes in ISO 10423: 2001 Annex 6A 17 th Equivalent Subject/Title Status A Appendix A Purchasing Guidelines Informative (optional) B Appendix B US Customary Units and Data Informative (optional) C Appendix C Calculation of Stud Both Lengths Informative (optional) D Appendix D Recommended Make-up Torque Informative (optional) E Appendix E Weld Groove Design Informative (optional) F Appendix F Performance Verification Procedures Informative (optional) G Appendix G Design and Rating for Elevated Temp. Informative (optional) H None (new) Running and Test Tools Normative (required) (if 6A is required by customer) I Spec 6AV1 Performance Verification for SSV/USV Normative (required) J Section 11 Repair and Remanufacture Normative (required) (ISO 10423 only!) Note: removed from API 6A 19 th Ed. K None (new) Top Connectors Informative (optional) L None (new) VR Plugs and Preparations Normative (required) (if 6A is required by customer) M (Table of Contents) List of Tables and Figures Informative None Appendix H Recc. Heat Treat Equip. Calibration Removed (manuf. to specify) None Appendix L Failure Reporting for SSV/USV Removed (US local reg. only) N Appendix K API Monogram Applicable only w/ monogram O None API Regional Annex, Errata for ISO 10423 Normative (required) Required only for API 6A, Not required for ISO 10423. Table 2: Changes to Reference Standards 6A 19 th /ISO 10423 Ref. Standard 6A 17 th Ed. Ref. Standard Comment Action Required or Effect on Business ISO 2859-1:1999 ANSI/ASQC Z1.4 Quality to review standards TBD ISO 10414-1 None Used in Annex I: SSV/USV Testing None ISO 10422 API 5B 10422 based on previous edition of 5B None use 5B* ISO 11960 API 5CT 11960 based on previous edition of 5CT None use 5CT* ISO 13533 none Same as API 16A. Review 16A 3 rd ed. ISO 13628-4 API 17D Standards not the same. Review differences. ISO 13678 None Thread dope qual: Used only in Annex D None API 7 None Drill Stem Elem: Used only in Annex H None EN 473 (SNT-TC-1A) Divisional Quality to review standards None either allowed (see 7.3.1, 7.3.2) SAE AS 568A:1974 None O-ring size standard None None (Annex H) API 6AV1 Performance Verification of SSV/USV s None None (deleted) ANSI B18.2.2 Square and Hex Nuts None no usage None (deleted) ASTM A 307 Carbon Steel Threaded Fasteners None no usage None (deleted) ASTM A 609 UT for castings None, in Annex O None (deleted) ASTM D 573 Rubber deterioration in heated oven None no usage None (deleted) ASTM D 865 Rubber deterioration in heated test tube None no usage None (deleted) ASTM E 186 Reference: heavy walled steel castings None, in Annex O None (deleted) ASTM E 280 Ref for radiography of castings 4-12 thk None, in Annex O Note: error in Annex O: ASTM E 208 should be E 280 None (deleted) ASTM E 446 Ref for radiography of castings 0-2 thk None, in Annex O None (deleted) MIL H-6875F Heat treat furnace calibration None can still use None (deleted) API 5L Line pipe None no usage Page 3 of 21
1 Scope 1.1 Purpose Re-written and refers to International Standard and repeats through the entire document. 1.2 Applicability The following equipment has been added to the applicability of this international standard Back-pressure valves Bull plugs Valve removal Plugs Hubs Pressure boundary penetrations (grease, sealant, check valve, and test ports and EM/CL lines) Running and test tools Wear bushings 1.3 Service Conditions Now defined service conditions Reference to Appendices being non-mandatory has been removed Interchangeability statement has been removed 1.4 Product Specification New PSL 3G - now 5 PSL s Levels New ISO products shown on the typical wellhead assemblies drawings 2 Normative references Now reads Standards referenced in this specification may be replaced by other international or national standards that can be shown to meet or exceed the requirements of the referenced standard. Manufacturers who use other standards in lieu of standards referenced herein are responsible for documenting the equivalency of the standards. WAS. for undated references, the latest edition of the referenced document (including any amendments applies Added ASTM A 609, ASTM E 186, ASTM E 208, and ASTM E 446 as normative references Seven (7) new ISO Normative (required) references New reference to API Spec 7 ASME Code references are the1998 edition MIL STD H6875F has been removed EN 5) 473 for NDT personnel qualification NACE MRO175/ISO15156-1 replaces NACE MR-0175:1999 throughout entire specification New SAE 8) AS 568A 1974 edition listed 3 Terms, definitions and abbreviations of terms 3.1 Terms and definitions New definitions added: Bull plug, Equivalent round (ER), Hot isostatic pressing (HIP), Hub, Pressure-boundary penetrations, Primary equipment, Prolongation, Running tool, Secondary equipment, Test Agency, Test tool, Thread protector, Valveremoval plug, Wear bushing, Exposed Bolting, Non-exposed Bolting, Job Lot Traceability Terms removed - API monogram, Authorized facility, Authorized quality assurance program, Critical components, Shall, Bottom Hole Test Adapter Modified terms: retained fluid now includes injected fluids, Test agency now includes API Specification 6AV1 3.2 Abbreviated terms There are nearly all new abbreviations, even though most of the terms have been in the book for years. 4 Design and performance General requirements 4.1 Performance requirements general Added SSV s and USV s shall be of the PR2 performance level and meet the requirements of Annex I. 4.2.1.1 Service conditions- SI equivalent of 15,000 PSI changed from 103.4 MPa to 103.5 MPa Pressure ratings- General 4.2.2.2 Design considerations Added Design for high temperature rating, e.g. X and Y, shall take into consideration the effects of temperature on strength levels, see Annex G for guidelines. 4.2.2.3 Temperature rating conditions Go to Table Section Table 2 for more details 4.2.3 Material class ratings Table 4.3 is now Table 3 Reference to Appendix A changed to Annex A Page 4 of 21
4.2.3.1 General Now reads.. Equipment shall be designed with materials, including metallics, which meet requirements set forth in Table 3. Table 3 does not define either the present or the future wellhead environment, but provides material classes for various levels of severity of service conditions and relative corrosivity. 4.2.3.2 Material classes Modified For Material Classes DD, EE, FF, HH shall include as part of the designation and marking the maximum allowable partial pressure of H2S in PSIA. The maximum allowable partial pressure shall be as defined by NACE MR0175-ISO 15156 at the designated API temperature class for the limiting component(s) in the equipment assembly. For example, FF-1,5 indicates Material Class FF rated at 1,5 PSIA H2S maximum allowable partial pressure. Where no H2S limit is defined by NACE MR0175- ISO 15156 for the partial pressure, NL shall be used for marking (i.e. DD-NL ) 4.2.3.3 Material Class ZZ Added material class ZZ allows use of components in sour environments outside of NACE ranges if proven history of success exists. 4.3.1 Connections Added new to specification 4.3.1.1 Flanges Reworded 4.3.1.2 Hub and Outlet Added new to specification. Added reference to ISO 13533 (16A) for hubs Connections 4.3.1.3 Clamps Added new to specification states ISO 13533 (16A) clamps are acceptable for installation on ISO 13533 (16A) hubs 4.3.2 Casing Hangers, Tubing Now includes back-pressure valves Hangers, Back-pressure valves, lock screws and stems 4.3.3.1 General Last sentence in 1 st paragraph references Table 5 - Standard materials are those materials whose properties meet or exceed the requirements of Table 5 was previously a Note in 17th edition 4.3.3.3 Theory of constant Added as known as the Von Mises Law energy of distortion 4.3.3.4 Experimental stress Added the words to those described in 4.3.3.2 and 4.3.3.3. analysis 4.3.3.5.1 General General Title added, test vessel, and was combined in 1st paragraph. 4.3.3.6 Non-standard materials design requirements Symbols have changed. 4.4 Miscellaneous Design Information 4.4.2 Tolerances Fractional decimal equivalence tables have been removed. Metric tolerances increased from X,XX +/-,1 to X,XX +/-,13 4.4.4.2 Test and gauge b) MPa 103,4 changed to 103,5 MPa connection ports 4.5 Design Documentation Removed reference to compliance with API as part of the criteria. 4.7 Design verification Now references design verification procedures vs. verification procedures. Added The performance verification procedures including acceptance criteria for SSV s and USV s are given in annex I. Additional verification procedures, including acceptance criteria, are given in annex F to be used if specified by the manufacturer or purchaser. Removed Table 4.4 - Fraction to Decimal Conversion Chart 5 Materials general requirements 5.1 General Added hub end connectors, back-pressure valves, bull plugs, valve-removal plugs, wear bushings, pressure-boundary penetrations to material requirements 5.2 Written Specifications 5.2.2 Metallic Requirements Back-pressure valves, bull plugs and valve-removal plugs now require manufacturer s written specified requirements for PSL 1: added quenching practice and cooling media b) for PSL 2 to PSL 4: added heat treating equipment calibration and removed cooling media 5.3 Mandrel tubing and casing hangers 5.3.1 Material a) PSL 1 requirements - removed yield, elongation, and reduction of area and replaced with tensile testing (editorial) Page 5 of 21
b) PSL 2 to PSL 4 requirements now states The requirements for PSL 2 to PSL 4 are identical to the requirements for PSL 1. In addition: impact requirements. Removed PSL 1 requirement plus and tensile testing. (editorial) 5.3.2.1 Casting practices a) PSL 1 requirements - All castings used for hanger mandrels shall meet applicable requirements of clause 5 and clause 7. WAS All castings used for hanger mandrels shall be of pressure vessel quality. b) PSL 2-4 requirements now read per Annex O. The requirements for PSL2-4 are identical to the requirements for PSL 1. In addition, the manufacture shall document foundry practices which establish limits for sand control, core making, rigging, melting, heat treatment and NDE to ensure repeatability in providing castings which meet the requirements of this international Standard. c) deleted per Annex O 5.3.2.2 Hot working Practices PSL 1 requirements - All wrought materials shall be formed using a hot-working practice(s) which produces a wrought structure throughout. WAS All wrought material shall be of pressure vessel quality and shall be formed 5.3.2.3 Melt practices PSL 1 to PSL 3 requirements WAS PSL 2 to PSL 3 requirements 5.3.3.2 Temperatures PSL 4 requirements - The ER of the heat sink shall be greater than or equal to the largest ER of any part in a heat treatment load. WAS The ER of the heat sink shall be greater than or equal to the largest ER of any single body, bonnet, or end or outlet connection in a heat treatment load. 5.3.5.1 General Removed last sentence Material used shall qualify a heat and hangers produced from that heat. 5.3.5.2 Tensile testing c) Retesting - Added removed from the same QTC with no additional heat treatment. 5.3.5.3 Impact Testing c) Retesting - Added removed from typically the same location within the same QTC with no additional heat treat. 5.4 Bodies, bonnets, end and outlet connections 5.4.1 General Added Standard and Non-Standard materials; Table references changed to Table 5, 6, and 7 5.4.2.2 PSL 1 tensile testing c) Retesting added removed from the same TC or QTC with no additional heat treatment 5.4.2.3 PSL 2 to PSL 4 tensile testing 5.4.2.4 PSL 1 to PSL 4 impact testing a) Test specimens removed last sentence This QTC shall be used to qualify a heat and the bodies, bonnets, and end and outlet connections produced from that heat. c) Same change as 5.4.2.2 c) c) Specimen orientation removed Lateral expansion shall be as stated in table 5.3 regardless of specimen orientation. 5.4.3.1 Casting Practices a) PSL 1 requirements now read All castings used for bodies, bonnets end and outlet connections shall meet applicable requirements of clause 5 and clause 7. WAS All castings shall be of pressure vessel quality. b) PSL 2-4 requirements now read per Annex O. The requirements for PSL 2-4 are identical to the requirements for PSL 1. In addition, the manufacture shall document foundry practices which establish limits for sand control, core making, rigging, melting, heat treatment and NDE to ensure repeatability in providing castings which meet the requirements of this international Standard. c) Delete per Annex O 5.4.3.2 Hot-working practices a) PSL 1 requirements now reads All wrought material(s) shall be formed using a hot-working practice(s) which produces a wrought structure throughout. WAS All wrought material shall be of pressure vessel quality and shall be formed 5.4.3.3 Melting practices a) PSL 1 to PSL 3 requirements WAS PSL 2 to PSL 3 requirements 5.4.4.1 Equipment qualification Deleted reference to Appendix H (and Appendix) for recommended furnace qualification. 5.4.4.2 Temperatures b) PSL 4 requirements - now reads The ER of the heat sink shall be greater than or equal to the largest ER of any part in a heat treatment load. WAS The ER of the heat sink shall be greater than or equal to the largest ER of any single body, bonnet, or end or outlet connection in a heat treatment load. 5.4.5.1 General Material shall conform to the manufacturer s written specification. WAS Body, bonnet, and end and outlet connection material shall conform b) Material composition shall be determined on a heat basis (or a remelt ingot basis for remelt grade materials) in accordance with a nationally or internationally recognized standard. WAS in accordance with a nationally or internationally recognized standard specified by the manufacturer. 5.4.5.2 Composition limits Tables 8 and 9 list element limits (% mass fraction) for carbon WAS Tables 5.5 Page 6 of 21
and 5.6 list elements limits (wt %) for carbon 5.5 Ring Gaskets 5.5.2 Material qualification testing c) Hardness Requirements - added Nickel alloy UNS N08825 - maximum hardness 92HRB 5.5.3.2 Heat-treating Removed c) Quenching (PSL 2-4 Requirements- Applies to those materials that are quenched and tempered) Paragraph 1 and 2. 5.6 Test coupons (TC) 5.6.1 General Added new requirement to the end of this clause per Annex 0. When a prolongation is used, it shall remain integrally attached during all head treatment operations except post weld heat treatment, stress relief, and any re-tempering or reaging that may be required. For tubular components, bar stock, mill shapes and other raw material with a uniform cross section, the prolongation shall have the same cross section as that raw material. For a production part with a complex shape or varying cross section, the prolongation need not be an extension of the largest cross section of the part. However, the extension shall meet or exceed the minimum equivalent round (ER) required for a separate TC. 5.6.2 Equivalent Round (ER) c) Now reads - Casting size not required to exceed size shown in ASTM A 703, figure 1. WAS Casting size not required to exceed size shown in ASTM A 703/A 703M, figure 1. 5.6.4.1 Tensile and impact test specimens 1 st Paragraph added Multiple TC s may be used 2nd Paragraph now read test specimens WAS tensile specimens 4 th Paragraph - Changed wording about test specimens removal from the 1/4T envelope location New wording: test specimens shall be removed from a section of the part meeting the size requirements for a TC for that production part as defined in 5.6.2 (Equivalent Round). 5 th paragraph added used to qualify carbon, low-alloy and stainless steel. ; added last sentence Either standard 12,7 mm (0.500 in) or standard sub-size specimens (see ASTM A 370) may be used to qualify CRA materials. 5.6.4.2 Hardness testing Hardness testing now allows both Rockwell and Brinell hardness tests. Subtitle b) METHOD was removed; however the same requirements are maintained Added ASTM E-18 to support Rockwell testing. Removed Other test methods may be used for CRA s provided they are converted to Brinell. 5.7 Qualification test coupons (QTC) 5.7.1 General 4 th Paragraph - For batch heat treatment only: if the QTC is a trepanned core or prolongation removed from a production part, the QTC. WAS or prolongation removed from a production part or a sacrificial production part, the QTC 5 th Paragraph - Added For material heat treated in a continuous furnace, the QTC shall consist of a sacrificial production part or a prolongation removed from a production part. The sacrificial production part, or prolongation QTC, shall only quality production parts having identical size and shape. The QTC shall only quality material and parts produced from the same heat and heat-treat lot. Added new requirement to the end of this clause per Annex 0. When a prolongation is used, it shall remain integrally attached during all head treatment operations except post weld heat treatment, stress relief, and any re-tempering or reaging that may be required. For tubular components, bar stock, mill shapes and other raw material with a uniform cross section, the prolongation shall have the same cross section as that raw material. For a production part with a complex shape or varying cross section, the prolongation need not be an extension of the largest cross section of the part. However, the extension shall meet or exceed the minimum equivalent round (ER) required for a separate TC. 5.7.2.1 ER Selection Added reference to clause 5.7.2.2 5.7.2.2 Figure 5.1 now changed to Figure 3 5.7.2.3 Size requirements PSL 3 and PSL 4 requirements - Size not required to exceed 125 mm (5 in) ER. Was b) PSL 3 requirements - Size not required to exceed 125 mm (5 in) ER. c) For PSL 4 removed 5.7.4.1 Tensile and impact test specimens 1 st Paragraph - deleted API Spec 6A QTC, replaced with of the requirements of this International Standard. 5.7.4.2 Hardness Testing Added Hardness testing shall be performed in accordance with the procedures in ASTM E 10 or ASTM E 18. Page 7 of 21
5.9 Material Qualification Paragraph was reworded from 17 th edition wording (editorial) 5.10 Bull plugs and valve-removal plugs Added -- Material requirements for bull plugs and valve-removal plugs shall, as a minimum, be the same as those specified for PSL 3 bodies, bonnets and end and outlet connections (see 5.4). 5.11 Back-pressure valves Added Material requirements for back-pressure valves shall, be the same as those specified for PSL 3 tubing hangers (see 5.3). 5.12 Pressure-boundary penetrations Added Material requirements for pressure-boundary penetrations shall be as specified by the manufacturer. Pressure boundary penetrations directly exposed to well-bore fluid and use in sour service (material classes DD, EE, FF, and HH) shall meet the requirements of NACE MR 0175. 5.13 Wear Bushings Added material requirements for wear bushings shall be as specified by the manufacturer. The hardness of the material shall be between 241 HBW and 321 HBW. 5.14 Hub-end connectors Material requirements for hubs, specified dimensionally is ISO 13533, shall be equal to the material requirements of the equipment to which the hub is connected. Minimum requirements are those of PSL 2 bodies, bonnets, end and outlet connections (see 5.4). 6 Welding General Requirements 6.1 General Added b) bull plugs, valve-removal plugs and back-pressure valves:. Added c) bull plugs, valve-removal plugs and back-pressure valves:. Added d) Weld overlay for corrosion resistance and/or hard facing and other material surface property controls WAS d) Weld overlay. 6.3 Pressure-containing fabrication weldments for bodies, bonnets, end and outlet connections, bull plugs, valveremoval plugs and back-pressure valves 6.3.1 General Added No fabrication welding is allowed on bull plugs and valve-removal plugs. 6.3.2.1 Joint Design Was Paragraph 6.3.1.1 6.3.2.3 Welding procedure qualification 2 nd Paragraph - added records in accordance with their requirements of 7.5 Hardness testing - added specific reference NACE MR-0175 versus NACE only. e) Hardness testing optional - reference changed to 7.4.2.1.3c. 6.3.3.1 PSL 2 General Added shall apply for PSL 2, in addition to the requirements given in 6.3.3.2 to 6.3.3.4. 6.3.3.2 Welding procedure Base metal groupings - removed the term WPS and added S-number grouping qualification b) Impact testing added At least one face of each specimen shall be within 1/4T from the surface of the material, where T is the thickness of the weldment 6.3.4.1 PSL 3 General Added The requirements of PSL 1 and PSL 2 shall also apply for PSL 3, in addition to the requirements given in 6.3.4.2 to 6.3.4.4. 6.3.4.2.3 Hardness testing Removed requirement location and frequency. Added ASTM E18 Rockwell method or the Vickers 10-kg method in accordance with ASTM E92. Figure 4 changed to Figure 6.1 b) Figure 5 was Figure 6.2. Added sentence to last paragraph For all thicknesses, multiple HAZ hardness tests equally spaced 3mm (1/8 in) apart shall be performed in each of the base materials within 0,3 mm (0,010in) of the weld interface with at least one within 2 mm (1/16 in) from the top and the bottom of the weld. 6.4 Pressure-containing repair weldments for bodies, bonnets, end and outlet connections, bull plugs, valve-removal plugs and back-pressure valves 6.4.1 General API removed from API material designation PQR section changed from 6.3.1.3 to 6.3.2.3 Added e) Repair welding of bull plugs, valve-removal plugs and back-pressure valves is not allowed. f) Now reads see also 7.4.2.2.13. g) Wording change now reads shall posses a valid qualification in accordance with 6.3.2.4. 6.4.2 PSL 2 and PSL 3 Reference changed to 7.4.2.2.14 a), b) and c) - added format and grouped text 6.5 Weld overlay for corrosion resistance and/or hard facing and other material surface property controls Page 8 of 21
6.5.1.1.1 PSL 1 Ring Grooves general 6.5.1.1.2 Welding procedure/performance qualification New sub clause applies to ring grooves in loose connectors and in integral end and outlet connections. a) Chemical Analysis added the term austenitic to 2 nd paragraph. 6.5.1.1.3 Application b) Title changed from API Grooves for Welding to Ring joint grooves for welding ; Table reference changed to Table 39. 6.5.1.2.1 Other corrosion-resistant overlay General 6.5.1.2.2 Welding procedure/performance qualification Added hub connector New Table for nickel-base alloy UNS N06625 Fe 5 Iron 5.0 max WAS Fe 5 Iron 5.0 minimum b) Mechanical properties removed the API designation in 2 nd sentence. Replaced the term charpy with the term impact test in 3 rd sentence. c) Weld conformance to NACE MR0175 added reference to ASTM E18 and STEM E-92. Figure 6 was Figure 6.3 Removed wording - Qualification requirements are not specified and added wording to first sentence. Requirement is the same. 6.5.1.4 Repair of weld overlays a), b), and c) were identified as 1, 2, and 3. b) added part of the design criteria of the manufacturer 6.5.2.1 PSL 2 to PSL 4 General Added the wording in addition to the requirements given in 6.5.2.2 to 6.5.2.5. 7 Quality control 7.1 General Was 7.1 Scope Scope changed to General old section 7.1 & 7.2 is combined in 7.1. 7.2 Measurement and Test Equipment 7.2 was Quality Control Records removed in its entirety 7.2.2.2 Calibration Procedures Now reads per Annex O.. Pressure measuring devices shall be periodically calibrated with a master pressure measuring device or a dead weight tester to at least three equidistant points of full scale (excluding zero and full scale as required points of calibration). 7.2.2.3 Calibration intervals Added new longer intervals (3 months maximum increment) established 7.3 Quality record requirements 7.3.1 Non-destructive Now includes an EN 473 option for NDE personnel examination (NDE) personnel 7.3.2 Visual examination Now includes an EN 473 option for NDE personnel personnel 7.3.3 Welding inspectors Added new senior certified weld inspector designation 7.4 Quality control requirements (was Section 7.5 in 17th edition) 7.4.1.2 Materials Materials, includes the listing of all the new products, Mandrel tubing and casing hangers, bull plugs, and VR plug, back-pressure valves, pressure boundaries penetrations, wear bushings, hub-end connections. 7.4.1.5 Material classes DD, EE, Added reference to clause 7.4.1. FF and HH 7.4.2 Bodies, bonnets, end and outlet connections and hub end connectors (see Table 11) 7.4.2.1.2 Impact testing (for temperature classifications K,L, N) Added hub end connections to clause description Table 11 was Table 7.1 Per Annex O add N to title of clause Added Impact testing shall be in accordance with. 7.4.2.1.3 Hardness testing Sampling changed sampling standard to ISO 2859-1, Level II, 4.0 AQL versus old MIL-STD-105 Also added hub end connectors Test methods was titled Methods Test methods - added at the test location to the end of the 3 rd sentence. Acceptance criteria hardness symbols changed in formula. 7.4.2.1.4 Dimensional verification a) Sampling - removed Additionally, sampling shall be in accordance with ANSI/ASQC Z1.4, Level II, 1.5 AQL. And added sampling in accordance with ISO 2859-1 Level 11, 1.5 AQL. b) Test method title was Methods. Figures 10, 11, and 12 were 10.4, 10.5 and 10.6 Page 9 of 21
respectively. c) Acceptance criteria lst paragraph removed reference to API 5B and replaced with shall be in accordance with ISO 10422 and removed - Additionally, sampling shall be in accordance with ANSI/ASQC Z1.4, Level II, 1.5 AQL. 7.4.2.1.6 Weld NDE General New General Requirement which is new PSL 1. CLAUSE MOVED FROM PSL 2 TO PSL 1 welding variables and equipment shall be monitored; welding activities shall be audited; and WAS welding variables and equipment shall be monitored; in process welding activities shall be audited; and 7.4.2.2.8 Surface NDE Ferromagnetic materials b) Test method title was Method Added 2 nd paragraph per Annex O If any indications are believed to be non-relevant on the basis that they are not associated with a surface rupture (i.e., magnetic permeability variations, nonmetallic stringers), they shall be examined by liquid-penetrant surface NDE methods, or removed and reinspected, to prove their non-relevancy. 7.4.2.2.10 Weld NDE General Deleted two paragraphs from the 17th edition. Now reads General requirements for PSL 2 shall be identical to the requirements for PSL 1 7.4.2.2.12 Weld NDE - Surface b) Test method/acceptance - magnetic-particle examination title did read Method magnetic Particle Examination. 2 nd Paragraph now reads Magnetic-particle examination and references paragraph 7.4.2.2.8 in lieu of 7.5.2.2.8. c) Test method/acceptance liquid-penetrant examination references paragraph 7.4.2.2.9 in lieu of 7.5.2.2.9 7.4.2.2.14 Weld NDE Volumetric c) Acceptance criteria Radiographic examination Weld thickness table dimension is now 0,75 was 0.76 in 17th edition. 7.4.2.3 PSL 3/3G Title was PSL 3 7.4.2.3.1 Tensile Testing shall be identical to the requirements for PSL 1 WAS shall be identical to the requirements for PSL 2 7.4.2.3.9 Weld NDE General Added new requirement - General Weld NDE Requirements for PSL 3 shall be identical to the requirements for PSL 1. Repair weld requirements for PSL 3 shall be identical to the requirements for PSL 2. 7.4.2.3.12 Weld NDE Volumetric Removed or when a pressure containing casting leaks on hydrostatic test 7.4.2.3.13 Weld NDE Hardness c) Acceptance criteria now references 7.4.2.1.3 versus 7.5.2.1.3 from the 17th edition. Testing 7.4.2.3.15 Volumetric NDE b) Ultrasonic examination now reads per Annex O Castings: Ultrasonic examinations of casting shall be performed in accordance with the flat bottom hole procedures specified in ASTM A 609 (except immersion method may be used) and ASTM E428. c) Radiographic examination - 1) Test Method now reads per Annex O. Radiographic inspection of hot worked parts or castings shall be performed in accordance with methods specified in 7.4.2.2.14. Test method now references paragraph 7.4.2.2.14 versus 7.5.2.2.14 c) Radiographic examination 2) Acceptance criteria now reads Weld thickness table dimension is now 0,75 was 0.76 in 17th edition c) Radiographic examination 2) Acceptance criteria now reads per ANNEX O. The following acceptance criteria apply to cast parts added back the ASTM standards and the maximum defect classification chart. 7.4.2.4.1 PSL 4 Tensile Testing Now reads identical to the requirements of PSL 1. WAS identical to the requirements of PSL 2. 7.4.2.4.2 Impact Testing Removed 2 nd sentence in 1st paragraph - Additionally, heats used to fabricate parts for temperature Classifications S,T,U,V shall be impact tested at 0 F (-18 C). Acceptance criteria: The minimum lateral expansion value for 10 mm X 10 mm specimens shall be.015 in. Removed 2 nd paragraph - Acceptance Criteria: The minimum lateral expansion value for 10 mm x 10 mm specimens shall be 0.015 in. 7.4.3.2 Volumetric NDE examination (PSL 3 and PSL 4) b) Test Method now reads inspection shall be performed in accordance with methods of 7.4.2.3.15 for wrought products. WAS b) inspection shall be performed in accordance with methods of 7.4.2.3.15 for hot worked products. References paragraph 7.4.2.3.15 versus 7.5.2.3.15 from the 17th edition d) Acceptance criteria reference paragraph 7.3.2.3.15 versus 7.5.2.3.15 from the 7.4.4 Other pressure-boundary penetrations (PSL 1 to PSL 4) 17th edition Added The material properties shall conform to the requirements of 5.1 and 5.2 to requirement. 7.4.6 Ring Gaskets 7.4.6 Ring gaskets Added PSL 1 to PSL 4 to clause title. New reference to Table 15 versus Table 7.5 from Page 10 of 21
(PSL 1 to PSL 4) the 17th edition (see Table 15) 7.4.6.1 Dimensional verification a) Acceptance Criteria now reads shall be in accordance with 10.4.2.1 was see 10.4. 7.4.6.2 Hardness testing Sampling now reads. in accordance with ISO 2859-1, Level 11, 1.5 AQL WAS. in accordance with ANSI/ASQC Z1.4, Level 11, 1.5 AQL. Acceptance criteria - added Material Maximum Hardness Nickel Alloy UNS N08825 92 HRB Figure 7 was Figure 7.0 from the 17th edition 7.4.6.3 Surface finish a) Sampling now reads Sampling shall be in accordance with the manufacturer s documented requirements. was a) No specified requirements. b) Test method - now reads The manufacturer s documented procedures shall be followed. WAS b) None specified. c) Acceptance criteria added column for added metric units Ra m 7.4.7 Studs and Nuts 7.4.7 Studs and nuts (PSL 1 to PSL 4) Changed title WAS Studs and nuts (PSL 1 and PSL 2) Remove paragraph 7.5.7.2 PSL 3-4 requirements that appeared in the 17th edition 7.4.7.4 Studs and nuts Dimensional verification a) Sampling - Added or the manufacturer s written specification for CRA s not covered by ASTM. b) Test method - Added same as a) and now includes CRA c) Acceptance criteria now includes CRA 7.4.7.5 Studs and nuts Hardness Testing b) Sampling now reads new requirement Additionally, ASTM A453, Grade 660 bolting and other CRA bolting material shall be individually hardness tested. WAS b) Additionally, ASTM A453, Grade 660 bolting and UNS-N05500 bolting shall be individually hardness tested. d) Acceptance Criteria now reads The acceptance criteria for exposed bolting shall be in accordance with NACE MR 0175. Hardness testing is not required on NACE MR 0175, non-exposed bolting. All other bolting shall be in accordance with the applicable ASTM specification, or the manufacturer s written specification for CRA s not covered by ASTM. WAS For NACE Class I and II bolting, see NACE standard MR 0175. This specification does not specify hardness testing on NACE standard MR0175, Class III bolting. For all other bolting, see applicable ASTM specification. 7.4.7.6 Studs and Nuts Chemical analysis Added, or the manufacturer s written specification for CRA s not covered by ASTM. 7.4.8 Non-metallic sealing materials (PSL 1 to PSL 4) 7.4.8.1.1 PSL 1 Dimensional verification a) Sampling now reads. in accordance with ISO 2859-1, Level II, 2.5 AQL for o- rings and 1.5 AQL for other seals..was. in accordance with ANSI/ASQC Z1.4, Level 7.4.8.1.2 PSL 1 Visual examination II. 2.5 AQL. a) Sampling now reads sampling in accordance with ISO 2859-1 Level II, 2.5 AQL for o-rings and 1.5 AQL for other seals.... WAS Additionally, sampling shall be in accordance with ANSI/ASQC Z1.4, Level II, 2.5 AQL. 7.4.8.1.3 PSL 1 Hardness Test a) Sampling now reads sampling in accordance with ISO 2859-1 Level II, 2.5 AQL for o-rings and 1.5 AQL for other seals.. WAS Additionally, sampling shall be in accordance with ANSI/ASQC Z1.4, Level II, 2.5 AQL. Removed d) documentation from clause in its entirety 7.4.9 Assembled Equipment 7.4.9.2 Assembly serialization Combined Assembly serialization and traceability records clauses from the 17th edition and traceability records 7.4.9.2.1 Assembly serialization b) PSL 2 to PSL 4 added back-pressure valves to serialization requirements 7.4.9.3.3 Hydrostatic body test Individual equipment a) Test Method added to lst paragraph. however if the bodies and other pressurecontaining parts have been made of wrought material, test may be completed after painting. 2 nd paragraph now includes bull plugs and valve-removal plugs. 6 th Paragraph now references Table 19 versus Table 7.9 from the 17th edition. 7.4.9.5.3 Records of pressure tests Added new equipment b) Chart recording of gas testing is not required. Records of 7.4.9.5.7 PSL 3G gas body test Individual equipment gas testing shall document test parameters and acceptance. Added PSL 3G to title c) Acceptance criteria - Added new requirement - A reduction of the gas test pressure of maximum 2.0 MPa (300 PSI) is acceptable as long as there are no visible bubbles in the water bath during the holding period. 7.4.9.5.8 PSL 3G gas seat test Valves Added PSL 3G to title Removed special considerations b) Acceptance criteria - Added new requirement - A reduction of the gas test Page 11 of 21
pressure of maximum 2.0 MPa (300 PSI) is acceptable as long as there are no visible bubbles in the water bath during the holding period. 7.4.9.6.7 Gas seat test Valves Removed special considerations b) Acceptance criteria - Added new requirement - A reduction of the gas test pressure of maximum 2.0 MPa (300 PSI) is acceptable as long as there are no visible bubbles in the water bath during the holding period. 7.4.10 Casing and Tubing Hanger Mandrels 7.4.10 Casing and tubing Added (PSL 1 to PSL 4) (See table 25) to title hanger mandrels (PSL 1 to PSL 4) (See Table 25) 7.4.10.1 PSL 1 Tensile testing Removed impact testing requirements 7.4.10.1.2 PSL 1 Dimensional verification a) Sampling now reads per Annex O.. All suspension, lift and back-pressure valve threads and retention profiles shall be gauged WAS All hanger suspension threads shall be gaged. b) Test method now reads Dimensionally verify ACME and other parallel thread profiles, in accordance with the manufacturer s specifications. WAS Other threads shall be gauged per the requirements of the thread manufacturers specification. 7.4.10.2 PSL 2 Welding Added Repair welding shall be in accordance with 6.4. 7.4.10.3.12 PSL 3 Repair welds New requirement reads Repair weld requirements shall be in accordance with 7.4.2.2.13 7.4.11 7.4.11.1 to 7.4.11.9 Bull plugs, valve-removal plugs and back-pressure valves (see Table 26) New clause with new requirements for bull plugs, valve-removal plugs and back-pressure valves. 7.4.11.5 Dimensional verification Now reads per Annex O.. Dimensional verification shall be in accordance with 7.4.2.1.4, In addition, all threads and retention profiles shall be gauged. 7.5 Quality control records requirements 7.5.2.5 Bull plugs, valve-removal plugs and back pressure valves 7.5.2.6 Assembled equipment records Added clause new requirements New requirements c) PSL 3, Item 3) Additionally, the following gas-test records are required for equipment designated PSL 3G: -actual test pressures; -actual holding period durations 7.5.3 Records to be furnished to purchaser 7.5.3.2 Body, bonnet, end and outlet connections, stem, valve-bore sealing mechanism, mandrel tubing and casing hanger records Deleted back-pressure valve to clause title per Annex O 7.5.3.6 Assembled equipment records 8.0 Equipment Marking c) PSL 3G and PSL 4 added PSL 3G to title. 8.1 Marking Requirements 8.1.1 General Now reads per Annex O. Manufacturers shall mark their equipment with API 6A in addition to or in place of ISO 10423 in the location specified in this clause. As a minimum, equipment should be marked with US Customary Units. Now references Table 27 versus Table 8.1 from the 17th edition 8.1.5 Thread marking Now references ISO 11960 and new thread type marking as identified below. THREAD MARKING REVISED AS FOLLOWS: Thread 19 TH ED 17 TH ED Line Pipe LP LP Casing (short) STC CSG Casing (long) LC LCSG Casing (buttress) BC - Casing (extreme line) XL - Tubing (non-upset) NU TBG Tubing (external-upset) EU UPTBG 8.1.7 Weld metal overlay "CRA" to designate a corrosion resistant alloy, or "SST" to designate an austenitic stainless steel. Page 12 of 21
8.1.9 Other end connectors Added new requirement b) Hub end connectors shall be marked "ISO 13533" following the size and pressure rating. 8.5 Valves and Chokes 8.5 Valves and Chokes a) Additional marking for multiple valves now includes additional sizes such as 3 1/16 x 2 1/16, 2 9/16 x 2 9/16. e) Valves prepared for actuator now reads Mark the letter V after ISO 10423. 8.7 Ring Gaskets 8.7.3 Ring Gaskets Added f) Surface and underwater safety valves now reads shall be marked with the letters SSV or USV following ISO 10423 or 6A Material Mark Nickel alloy 825-4 UNS N08825 Other CRA Materials UNS number-4 8.8 Studs and nuts 8.8.1 Stud marking Now reads CRA material studs shall be metal-stamped with the UNS numbering or, if this is not available, the alloy trade name and yield strength shall be marked. WAS UNS N05500 material studs shall be metal-stamped "K-M". 8.8.3 Impact testing Now reads The impact test temperatures in degrees centigrade (or degrees Fahrenheit) for all CRA material studs shall be metal-stamped directly under the "CRA" marking WAS The impact temperatures for all UNS N05500 material studs shall be metalstamped directly under the "K-M" marking 8.10 Valve removal plugs New clause new requirements 8.11 Bull plugs New clause new requirements 8.12 Back-pressure valves New clause new requirements 9.0 Storing and shipping Assigned to Tom Holtkamp 9.4 Assembly and maintenance instructions Added new requirement This includes, if relevant, an operating manual for equipment specified in annex H. (ANNEX H Design and manufacture of surface wellhead running, retrieving and testing tools, clean-out tools and wear bushings) 10.0 Equipment-specific requirements 10.2 Threaded end and outlet connections 10.2 Threaded end and outlet connection Now references ISO 10422 versus API 5B from the 17th edition 10.2.1 General 10.2.2.3 Thread counter bores Now reads per Annex O.. The requirements for integral equipment. Was The requirements for loose and integral equipment. Now reads: Internal threads, furnished without a counter-bore, should have the outer angles of 45 to a minimum WAS counter-bore, shall have the outer angles.. Internal threads, furnished with a counter-bore, should conform to the counterbore dimensions specified WAS with a counter-bore, shall conform to the counter-bore and the bottom of the counter-bore should be chamfered at an angles of 45 WAS and the bottom of the counter-bore shall be chamfered at an angles of 45 10.3 Studs and nuts 10.3.3.1 General Removed c) Application limitations for sour service and removed Class designation (i.e. Class I, II, III) for studs 10.3.3.2 NACE exposed bolting Terminology changed was Class I Studs. Page 13 of 21
10.3.3.3 NACE exposed bolting (low strength) 10.3.3.4 NACE non-exposed bolting Requirements for UNS N05500 were removed. Added b) CRA Materials Other CRA materials may be used provided they satisfy the minimum mechanical requirements of ASTM A 453 Grade 660 bolting except the maximum hardness shall meet NACE MR 0175 requirements. Added note that bolting used with insulated flanges shall meet 10.3.3.3 which is B7M or L7M only. Terminology changed was Class II Studs. a) ASTM A194 Grade B7M now reads.. for flanges listed in Table 49 for the NACE MR 0175 exposed bolting (low strength) only WAS. for the API flanges listed in Table 10.15 for Class II only. b) ASTM A320 Grade L7M now reads.. for flanges listed in Table 49 for the NACE MR 0175 exposed bolting (low strength) only WAS. for the API flanges listed in Table 10.15 for Class II only. Terminology changed was Class III Studs) a) ASTM A193 Grade B7 now reads.. for flanges listed in Table 49 for the NACE MR 0175 non- exposed bolting only WAS. for the API flanges listed in Table 10.15 for Class III only b) ASTM A320 Grade L7 or L43 - now reads.. for flanges listed in Table 49 for the NACE MR 0175 non- exposed bolting only WAS. for the API flanges listed in Table 10.15 for Class III only 10.3.3.5 NACE nuts Now reads. b) NACE exposed bolting was b) Class I. Now reads. ASTM A453 Grade 660 or CRA nuts may be used with NACE exposed bolting only if provisions are made to prevent galling.. WAS UNS N05500 or ASTM A453 Gr. 660 nuts may be used with Class I bolting only if provisions are made to prevent galling. 10.5.4 Multiple Valves 10.5.4.2.3 Arrangement (from 17 th ) 10.5.4.2.4 Angular Spacing (from 17 th ) 10.5.4.2.7 Bolt-hole location for flanges Requirement removed in its entirety. Requirement removed in it s entirely. Now reads A pair of bolt holes in both end flanges shall straddle the common centerline. WAS A pair of bolt holes in both end flanges shall straddle the reference centerline. Requirement removed in its entirety. 10.5.4.2.8 (from 17 th ) Reference Centerline Location 10.5.4.2.10 Bore Tolerances Requirement removed in its entirety (form 17 th ) 10.5.4.3 Materials Requirement removed in its entirety (from 17 th ) 10.5.4.4 Reference Centerline Requirement removed in its entirety. (from 17 th ) 10.5.7 Check valves 10.5.7.3 Material Requirement removed in its entirety for b) Pipe Plugs and c) Other parts 10.6 Casing and tubing heads 10.6.3.3 Outlet connectors b) Flanged or studded - now reads per Annex O - valve-removal plug preparations shall be in accordance with annex L. WAS valve removal plug preparations and valve removal plugs are outside the scope of this specification. 10.6.3.5 Vertical bores Added new requirement c) Increased-opening vertical bore - In order to accept wear bushings and packer mechanisms, the vertical bore may be increased above the values in column 6 of table 68. However it is the responsibility of the manufacturer to ensure that the over-size preparation does not cause the body stress to exceed the design allowables. 10.6.3.6 Rated working pressure Now reads Account shall be taken of the rated working pressure limitations for thread connectors based on size and type of thread. WAS Note the rated working pressure limitations 10.6.3.7 Test, vent, injection and gauge connectors Added new requirement c) Trapped pressure - A means shall be provided such that any pressure behind a test, vent, injection and gauge connector can be vented prior to opening the connection. Page 14 of 21
10.6.3.9 Wear bushings Added new requirement Wear bushings shall be as specified in annex H 10.7 Casing and tubing hangers 10.7.2.1 Performance requirements for Group 4 slip hangers Now reads. If a cross-over pack-off is included on the hanger, then it shall hold higher rated working pressure from above. WAS then it shall hold pressure from above. 10.7.3.6 Welds Now reads The design of any weld shall be such that it will satisfy all the design requirements of 10.7.3. WAS The design of any weld shall be such that it will meet or exceed these design requirements. 10.7.3.7 Pipe Dimensions Now references ISO 11960 versus API 5CT Removed Appendix I provides information concerning the use of API Spec 6A wellhead equipment with API Spec 5CT casing and tubing. Added Caution: CAUTION Manufacturers and users are reminded that the tolerances of casing and tubing outside diameters vary substantially between the various editions of ISO 11960 and API Spec 5CT. In general, the tolerance has increased over time; this may affect equipment interchangeability. 10.7.8 Installation Added new requirement For running and retrieving tools for casing and tubing hangers, see Annex H. 10.8 Tubing head adapters 10.8.3.2 End connectors b) Upper connector now reads.. hub end connectors according to ISO 13533 or swivel flanges according to ISO 13628-4. 10.8.3.3 Rated working pressure Now reads.. Account shall be taken of the rated working pressure WAS.. Note the rated working pressure 10.9 Chokes 10.9.3.3 Nominal size New nominal sizes Choke with metric bean sizes will be affected by this requirement 10.9.3.7 Flow beans for positive chokes Added per Annex O.. a) Proration beans Proration beans shall have a net effective orifice length of 6 in. +- 0.06 in. (152.4 mm, +- 1.5 mm) The orifice diameters of these beans shall be specified in 1/64 in. diametrical increments (i.e., 5/64, 6/64, 7/64, 8/64, etc.). b) Production beans The orifice size of any individual production bean and the increment between sizes are optional with the manufacturer. 10.9.3.8 Adjustable choke indicating mechanism Orifice opening markings now indicate 1/32 s of an inch instead of 1/64 s inch. 10.12 Fluid sampling devices 10.12.3 Design c) Sampling connector now reads and shall be not less than half the nominal line pipe or NPT size. WAS and shall be not less than 1/2 in. nominal line pipe size. 10.14 Cross-over connectors 10.14.3.4 Restricted-area pack-off 2 nd paragraph now references ISO 11960 versus API 5CT from the 17 th edition. Now includes Caution Manufacturers and users are reminded that the tolerances of casing and tubing outside diameters vary substantially between the various editions of ISO 11960 and API Spec 5CT. In general, the tolerance has increased over time; this may affect equipment interchangeability. 10.15 Adapter and spacer spools 10.15.2 Design For adapter and spacer spool connections, added reference to ISO 13533 for hubs. 10.16 Actuators 10.16.3.3 Fluid connectors Now reads connections smaller than ½ line pipe or NPT size. WAS connectors smaller than ½ nominal line pipe. 10.16.3.4 Material class Per Annex O now reads Components shall be capable of functioning while subjected to test fluid consistent with the material classes specified in Table 3. 10.16.3.6 Electrical specifications or the applicable standards of IEC/CENELEC. WAS or other internationally recognized electrical codes. 10.16.6.1 Hydrostatic Testing Added in case the bonnet for the mating valve forms an integral part of a loose actuator, the bonnet shall satisfy the requirements of 10.5 and 10.9. b) Pneumatic, hydraulic or electrical actuators added electrical to title. 10.16.6.2 Functional Testing c) Gas back-seat test now reads If the bonnet and actuator are furnished as a unit for PSL 3G valves a test may be conducted in accordance with 7.4.9.5.9. 10.17 Packing mechanisms for lock screws, alignment pins and retainer screws 10.17.3 Trapped pressure Added new requirement c) Trapped pressure Page 15 of 21