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Specification for Wellhead andChristmas Tree EquipmentANSI/API SPECIFICATION 6ATWENTIETH EDITION, OCTOBER 2010EFFECTIVE DATE: APRIL 1, 2011CONTAINS API MONOGRAM ANNEX AS PART OF U.S. NATIONALADOPTIONISO 10423:2009 (Modified), Petroleum and natural gasindustries—Drilling and production equipment—Wellhead and christmas tree equipment
Specification for Wellhead andChristmas Tree EquipmentUpstream SegmentANSI/API SPECIFICATION 6ATWENTIETH EDITION, OCTOBER 2010EFFECTIVE DATE: APRIL 1, 2011CONTAINS API MONOGRAM ANNEX AS PART OF U.S. NATIONALADOPTIONISO 10423:2009 (Modified), Petroleum and natural gasindustries—Drilling and production equipment—Wellhead and christmas tree equipment
Special NotesAPI publications necessarily address problems of a general nature. With respect to particular circumstances, local,state, and federal laws and regulations should be reviewed.Neither API nor any of API's employees, subcontractors, consultants, committees, or other assignees make anywarranty or representation, either express or implied, with respect to the accuracy, completeness, or usefulness of theinformation contained herein, or assume any liability or responsibility for any use, or the results of such use, of anyinformation or process disclosed in this publication. Neither API nor any of API's employees, subcontractors,consultants, or other assignees represent that use of this publication would not infringe upon privately owned rights.API publications may be used by anyone desiring to do so. Every effort has been made by the Institute to assure theaccuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, orguarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss ordamage resulting from its use or for the violation of any authorities having jurisdiction with which this publication mayconflict.API publications are published to facilitate the broad availability of proven, sound engineering and operatingpractices. These publications are not intended to obviate the need for applying sound engineering judgmentregarding when and where these publications should be utilized. The formulation and publication of API publicationsis not intended in any way to inhibit anyone from using any other practices.Any manufacturer marking equipment or materials in conformance with the marking requirements of an API standardis solely responsible for complying with all the applicable requirements of that standard. API does not represent,warrant, or guarantee that such products do in fact conform to the applicable API standard.Users of this Specification should not rely exclusively on the information contained in this document. Sound business,scientific, engineering, and safety judgment should be used in employing the information contained herein.All rights reserved. No part of this work may be reproduced, translated, stored in a retrieval system, or transmitted by any means,electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher. Contact thePublisher, API Publishing Services, 1220 L Street, NW, Washington, DC 20005.Copyright 2010 American Petroleum Institute
API ForewordNothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for themanufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should anythingcontained in the publication be construed as insuring anyone against liability for infringement of letters patent.Shall: As used in a standard, "shall" denotes a minimum requirement in order to conform to the specification.Should: As used in a standard, "should" denotes a recommendation or that which is advised but not required in orderto conform to the specification.This document was produced under API standardization procedures that ensure appropriate notification andparticipation in the developmental process and is designated as an API standard. Questions concerning theinterpretation of the content of this publication or comments and questions concerning the procedures under whichthis publication was developed should be directed in writing to the Director of Standards, American PetroleumInstitute, 1220 L Street, NW, Washington, DC 20005. Requests for permission to reproduce or translate all or any partof the material published herein should also be addressed to the director.Generally, API standards are reviewed and revised, reaffirmed, or withdrawn at least every five years. A one-timeextension of up to two years may be added to this review cycle. Status of the publication can be ascertained from theAPI Standards Department, telephone (202) 682-8000. A catalog of API publications and materials is publishedannually by API, 1220 L Street, NW, Washington, DC 20005.Suggested revisions are invited and should be submitted to the Standards Department, API, 1220 L Street, NW,Washington, DC 20005, standards@api.org.iii
ContentsPageAPI Foreword . iiiForeword . ixIntroduction . x11.11.21.31.4Scope . 1Purpose . 1Applicability . 1Service conditions. 2Product specification levels . 32Normative references . 633.13.2Terms, definitions and abbreviated terms . 8Terms and definitions . 8Abbreviated terms . 2044.14.24.34.44.54.64.7Design and performance — General requirements . 21Performance requirements — General. 21Service conditions. 21Design methods. 24Miscellaneous design information . 28Design documentation . 29Design review . 29Design validation . s — General requirements . 29General . 29Written specifications . 30Mandrel tubing hangers and casing hangers . 31Bodies, bonnets and end and outlet connections . 34Ring gaskets . 41Test coupons . 42Qualification test coupons . 47Heat-treating equipment qualification . 49Material qualification . 49Pressure-boundary penetrations . 49Wear bushings . 50Clamp hub-end connectors . 5066.16.26.3Welding — General requirements . 50General . 50Non-pressure-containing weldments other than weld overlays — PSL 1 to PSL 3 . 50Pressure-containing fabrication weldments for bodies, bonnets, end and outlet connections,bullplugs, valve-removal plugs and back-pressure valves. 50Pressure-containing repair weldments for bodies, bonnets, end and outlet connections,bullplugs, valve-removal plugs and back-pressure valves. 56Weld overlay for corrosion resistance and/or hard facing and other material surface propertycontrols. 586.46.577.17.27.37.47.5Quality control . 62General . 62Measuring and testing equipment . 62Quality-control personnel qualifications . 62Quality control requirements . 63Quality control records requirements . 10388.1Equipment marking . 108Marking requirements . 108v
8.28.38.48.58.68.78.88.98.108.118.12Wellhead equipment . 110Connectors and fittings . 110Casing and tubing hangers . 110Valves and chokes . 111Loose connectors [flanged, threaded, other end connectors (OEC) and welded] . 112Other equipment . 112Studs and nuts . 113Christmas trees . 113Valve-removal plugs . 114Bullplugs. 114Back-pressure valves . 11499.19.29.39.49.59.6Storing and shipping . 114Draining after testing .
Specification for Wellhead and Christmas Tree Equipment ANSI/API SPECIFICATION 6A TWENTIETH EDITION, OCTOBER 2010 EFFECTIVE DATE: APRIL 1, 2011 CONTAINS API MONOGRAM ANNEX AS PART OF U.S. NATIONAL ADOPTION ISO 10423:2009 (Modified), Petroleum and natural gas industries—Drilling and production equipment— Wellhead and christmas tree equipment
