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American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsAPI SpecificationISO 10423:2009 (Modified), Petroleum and natural gas industries–Drilling and production equipment–Wellhead and christmas treeequipment6A20th Edition, October 2010Specification for Wellhead and ChristmasTree EquipmentTable of Contents1.0Product Description1.11.21.31.41.51.62.0Purchaser’s Rights2.12.23.0Data SheetsShipping Requirements6.17.0PerformanceTesting Requirements5.16.0Material SelectionData Sheets & OrderingWellhead EquipmentDesign Requirements4.15.0ComplianceRepair & RemanufacturePurchaser’s Responsibility3.13.23.34.0ProductsWellhead EquipmentChristmas Tree EquipmentProduct ComponentsConfigurationSpecification LevelsReportsDocumentation Requirements7.17.2Instructions / ManualRecordsCopyright 2012 – API-American Petroleum Institute6A-1

American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsthAPI Specification 6A: 20 Edition, October 2010Specification for Wellhead and Christmas TreeEquipment1.0 Product DescriptionSpecification 6A includes the following requirements for product ordered and may be applicable inaddition to any product-specific requirements listed in other sections identified herein:1.1PRODUCTS: WELLHEAD & CHRISTMAS TREE EQUIPMENT1.1.1API Specification 6A – IntroductionIt is necessary that users of this International Standard be awarethat further or differing requirements can be needed for individualapplications. This International Standard is not intended to inhibita vendor from offering, or the Purchaser from accepting,alternative equipment or engineering solutions for the individualapplication. This can be particularly applicable where there isinnovative or developing technology. Where an alternative isoffered, it is the responsibility of the vendor to identify anyvariations from this International Standard and provide details.1.1.2API Specification 6A – 1.1This International Standard specifies requirements and givesrecommendations for the performance, dimensional andfunctional interchangeability, design, materials, testing, inspection,welding, marking, handling, storing, shipment, Purchasing, repairand remanufacture of wellhead and christmas tree equipment foruse in the petroleum and natural gas industries.1.1.3API Specification 6A – 1.2This International Standard is applicable to the following specificequipment:a) Wellhead equipment: casing-head housings casing-head spools tubing-head spools cross-over spools multi-stage head housings and spoolsCopyright 2012 – API-American Petroleum Institute6A-2

American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsthAPI Specification 6A: 20 Edition, October 2010Specification for Wellhead and Christmas TreeEquipmentb) Connectors and fittings: cross-over connectors tubing-head adapters top connectors tees and crosses fluid-sampling devices adapter and spacer spoolsc) Casing and tubing hangers: mandrel hangers slip hangersd) Valves and chokes: single valves multiple valves actuated valves valves prepared for actuators check valves chokes surface and underwater safety valves and actuators back-pressure valvese) Loose connectors [flanged, threaded, other end connectors(OEC), and welded]: weld neck connectors blind connectors threaded connectors adapter and spacer connectors bullplugs valve-removal plugsf) Other equipment: actuators clamp hubs pressure boundary penetrations ring gaskets running and testing tools (see Annex H) wear bushings (see Annex H)Copyright 2012 – API-American Petroleum Institute6A-3

American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsthAPI Specification 6A: 20 Edition, October 2010Specification for Wellhead and Christmas TreeEquipment1.2Wellhead EquipmentDescription1.2.1API Specification 6A – 1.4 Figure 1Copyright 2012 – API-American Petroleum Institute6A-4

American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsthAPI Specification 6A: 20 Edition, October 2010Specification for Wellhead and Christmas TreeEquipment1.2.2API Specification 6A – 1.4 Figure 1 (cont.)Copyright 2012 – API-American Petroleum Institute6A-5

American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsthAPI Specification 6A: 20 Edition, October 2010Specification for Wellhead and Christmas TreeEquipment1.3Christmas Tree EquipmentDescription: API Specification 6A – 1.4 Figure 2Copyright 2012 – API-American Petroleum Institute6A-6

American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsthAPI Specification 6A: 20 Edition, October 2010Specification for Wellhead and Christmas TreeEquipment1.4PRODUCT COMPONENTS1.4.1ActuatorAPI Specification 6A – 3.1.3Mechanism for the remote or automatic operation of a valve orchoke.1.4.2AdapterAPI Specification 6A – 3.1.4Pressure-containing piece of equipment having end connectionsof different nominal sizes and/or pressure ratings, used to connectother pieces of equipment of different nominal sizes and/orpressure ratings.1.4.3Annular pack-offAPI Specification 6A – 3.1.5Mechanism that seals off annular pressure between the outsidediameter of a suspended tubular member or hanger and the insidediameter of the head or spool through which the tubular memberpasses or hanger is suspended.1.4.4Back-pressure valveAPI Specification 6A – 3.1.7Unidirectional or bidirectional check valve that is installed throughthe christmas tree, into the tubing hanger, and prevents well fluidsfrom flowing out of the well.1.4.5Blind flangeAPI Specification 6A – 3.1.8Flange with no centre bore, used to close off completely a flangedend or outlet connection.1.4.6BodyAPI Specification 6A – 3.1.9Any portion of wellhead and christmas tree equipment betweenend connections, with or without internal parts, which containswell-bore pressure.Copyright 2012 – API-American Petroleum Institute6A-7

American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsthAPI Specification 6A: 20 Edition, October 2010Specification for Wellhead and Christmas TreeEquipment1.51.4.7BonnetAPI Specification 6A – 3.1.10Pressure-containing closure for a body, other than an end oroutlet connection1.4.8BullplugAPI Specification 6A – 3.1.12Pressure-containing closure for a female-threaded end or outletconnection, which may have an internal counter-bore and/or testport.CONFIGURATIONProduct:1.5.1Wellhead & Christmas Tree EquipmentAPI Specification 6A – Annex A.3Examples of typical wellhead and christmas tree configurations areshown in Figures A.12 and A.13. Also included are examples ofcasing and bit programmes that are consistent with the wellheadsshown.Copyright 2012 – API-American Petroleum Institute6A-8

American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsthAPI Specification 6A: 20 Edition, October 2010Specification for Wellhead and Christmas TreeEquipmentPSL 3G includes all the requirements of PSL 3 plus additionalpractices currently being implemented by a broad spectrum of theindustry for a specific range of service conditions, as described inthis annex. The designation PSL 3G is utilized only in those clauses,subclauses and tables where it is necessary to define theadditional gas testing requirements of equipment that can be gastested.PSL 4 includes all the requirements of PSL 3G plus certainadditional requirements and is intended for applications thatexceed the service conditions usually identified within the scope ofthis International Standard, and is normally used only for primaryequipment.Figure A.14 shows the recommended specification level forprimary equipment. Primary equipment of a wellhead assemblyincludes the following, as a minimum: tubing head tubing hanger tubing-head adapter lower master valveAll other wellhead parts are classified as secondary. Thespecification level for secondary equipment may be the same as orless than the level for primary equipment.The selection of a PSL should be based on a quantitative riskanalysis, which is a formal and systematic approach to identifyingpotentially hazardous events and estimating the likelihood andconsequences to people, environment and resources, of accidentsdeveloping from these events.Copyright 2012 – API-American Petroleum Institute6A-12

American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsthAPI Specification 6A: 20 Edition, October 2010Specification for Wellhead and Christmas TreeEquipment2.0 PURCHASER’S RIGHTS2.12.2COMPLIANCEProduct:2.1.1Wellhead & Christmas Tree EquipmentAPI Specification 6A – 3.1.88Qualified Personnel - individual with characteristics or abilitiesgained through training, experience, or both, as measured againstthe established requirements of the manufacturer/Purchaser/thisInternational Standard.2.1.2API Specification 6A – 4.2.3.2For material classes DD, EE, FF and HH, the manufacturer shallmeet the requirements of ISO 15156 (all parts) (NACE MR0175; seeClause 2) for material processing and material properties (e.g.hardness).REPAIR & REMANUFACTUREProduct:2.2.1Wellhead & Christmas Tree EquipmentAPI Specification 6A – Annex J.1Annex J defines the requirements for repair and remanufacture ofuser/purchaser-owned wellhead and christmas tree equipmentoriginally manufactured in accordance with this InternationalStandard for continued service by the user/purchaser.2.2.2API Specification 6A – Annex J.2.1Repair and remanufacture levels (RL) provide the basis for definingand controlling repair and remanufacture of wellhead andchristmas tree equipment during its life cycle. RL levels as definedin this annex include requirements consistent with sound industrypractices for repair and remanufacture activities.2.2.3API Specification 6A – J.2.2RL levels are representative of the product specifications and, ifapplicable, product specification level (PSL) to which theequipment was originally manufactured. RL levels indicate thelevel of technical requirements associated with the repair orCopyright 2012 – API-American Petroleum Institute6A-13

American Petroleum InstitutePurchasing Guidelines API Monogram EquipmentPurchase API Spec 6A online at www.api.org/publicationsthAPI Specification 6A: 20 Edition, October 2010Specification for Wellhead and Christmas TreeEquipmentremanufacture of equipment and do not represent equipmentsuitability for specific service or performance requirements. TableJ.1 summarizes the requirements of this annex to assist thecustomer and the repairer/remanufacturer in the selection of theappropriate RL level for equipment.2.2.4API Specification 6A – J.2.3The original product specification and PSL levels shall be used todetermine the RL levels to which equipment may be repaired orremanufactured as follows:a) Equipment identified as originally manufactured to API Spec 6Aprior to introduction of PSL levels shall be repaired orremanufactured to RL 1.b) Equipment identified as originally manufactured to PSL 1 shallbe repaired or remanufactured to RL 1.c) Equipment identified as originally manufactured to PSL 2 shallbe repaired or remanufactured to RL 1 or RL 2.d) Equipment identified as originally manufactured to PSL 3 shallbe repaired or remanufactured to RL 1, RL 2 or RL 3.e) Equipment identified as originally manufactured to PSL 4 shallbe repaired or remanufactured to RL 1, RL 2, RL 3 or RL 4.f) Equipment identified as originally manufactured to API Spec14D or ASME SPPE 1 shall be repaired or remanufactured to RL 2.Copyright 2012 – API-American Petroleum Institute6A-14

29.04.2012 · API Specification 6A – 3.1.7 Unidirectional or bidirectional check valve that is installed through the christmas tree, into the tubing hanger, and prevents well fluids from flowing out of the well. 1.4.5 Blind flange API Specification 6A – 3.1.8 Flange with no centre bore, used to close off completely a flanged end or outlet connection. 1.4.6 BodyFile Size: 1MBPage Count: 40