Repair and Remanufacture of Wellhead and Tree Equipment

API STANDARD 6AR

SECOND EDITION, SEPTEMBER 2019

Special Notes

API 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 any warranty or representation, either express or implied, with respect to the accuracy, completeness, or usefulness of the information contained herein, or assume any liability or responsibility for any use, or the results of such use, of any information 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.

Classified areas may vary depending on the location, conditions, equipment, and substances involved in any given situation. Users of this specification should consult with the appropriate authorities having jurisdiction.

Users of this standard should not rely exclusively on the information contained in this standard. Sound business, scientific, engineering, and safety judgment should be used in employing the information contained herein. API is not undertaking to meet the duties of employers, service providers, or suppliers to warn and properly train and equip their employees, and others exposed, concerning health and safety risks and precautions, nor undertaking their obligations to comply with authorities having jurisdiction.

Information concerning safety and health risks and proper precautions with respect to particular materials and conditions should be obtained from the employer, the service provider or supplier of that material, or the material safety datasheet.

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API publications are published to facilitate the broad availability of proven, sound engineering and operating practices. These publications are not intended to obviate the need for applying sound engineering judgment regarding when and where these publications should be used. The formulation and publication of API publications is not intended in any way to inhibit anyone from using any other practices.

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Copyright © 2019 American Petroleum Institute

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Foreword

Nothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent.

The verbal forms used to express the provisions in this document are as follows.

Shall: As used in a standard, “shall” denotes a minimum requirement to conform to the standard.

Should: As used in a standard, “should” denotes a recommendation or that which is advised but not required to

conform to the standard.

May: As used in a standard, “may” denotes a course of action permissible within the limits of a standard. Can: As used in a standard, “can” denotes a statement of possibility or capability.

ThisdocumentwasproducedunderAPIstandardizationproceduresthatensureappropriatenotificationandparticipation in the developmental process and is designated as an API standard. Questions concerning the interpretation of the content of this publication or comments and questions concerning the procedures under which this publication was developed should be directed in writing to the Director of Standards, American Petroleum Institute, 200 Massachusetts Avenue, Suite 1100, Washington, DC 20001. Requests for permission to reproduce or translate all or any part of 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-time extension of up to two years may be added to this review cycle. Status of the publication can be ascertained from the API Standards Department, telephone (202) 682-8000. A catalog of API publications and materials is published annually by API, 200 Massachusetts Avenue, Suite 1100, Washington, DC 20001.

Suggested revisions are invited and should be submitted to the Standards Department, API, 200 Massachusetts Avenue, Suite 1100, Washington, DC 20001, standards@api.org.

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Contents

Page

1. Scope 1

2. Normative References 1

3. Terms, Definitions and Abbreviated 1

   1. Terms and Definitions 1

   2. Abbreviated Terms 2

4. General 3

   1. Quality Management System 3

   2. Repair and Remanufacture Specification Levels (RSL) 3

   3. Application of RSL 3

   4. Service Conditions 4

5. Design Requirements 4

   1. General 4

   2. Product Definition 4

   3. Product Definition Status 4

   4. Product Definition Changes 4

   5. Product Definition Documentation 4

6. Materials 5

7. Prior to Repair/Remanufacture 5

   1. Shipping and Receiving of Equipment 5

   2. Equipment Identification 5

8. Repair and Remanufacture 5

   1. Parts 5

   2. Repair of Assembled Equipment 6

   3. Remanufacture of Assembled Equipment 6

9. Welding 7

10. Quality Control 7

    1. General 7

    2. Personnel 7

    3. Measuring and Testing Equipment 7

    4. Reuse of Bodies, Bonnets, End and Outlet Connectors, Stems, and Mandrel Hanger Bodies 7

    5. Valve Bore Sealing Mechanisms 10

    6. Closure Bolting 12

    7. Non-metallic Seals 13

    8. Metallic Seals 13

    9. Tapped Holes for Closure Bolting 13

11. Factory Acceptance Testing for Assembled Equipment 13

12. Quality Control Records 14

    1. Replacement Part Records 14

    2. Assembled Equipment Records 14

    3. Records Furnished to Purchasers 14

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       Contents

       Page

    4. Records Retention 14

13. Equipment Marking–Assembly 14

    1. General 14

    2. Repair and Remanufacture Markings 14

14. Storing and Shipping 15

Bibliography 16

Tables

1. Allowable Repair/Remanufacture Specification Levels 3

2. Quality Control Requirements for Reuse of Bodies, Bonnets, End and Outlet Connectors, Stems,

   and Mandrel Hanger Bodies 7

3. Quality Control Requirements for Valve Bore Sealing Mechanisms 10

4. Reuse of Closure Bolting (RSL 1 and RSL 2)a 12

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Repair and Remanufacture of Wellhead and Tree Equipment

1. Scope

   
   

   This standard identifies the requirements for repair and remanufacture of wellhead and tree equipment manufactured in conformance with API Specification 6A for continued service when specified by the user/ purchaser of the equipment.

   
   

   This standard applies to equipment manufactured to editions of API 6A in which a product specification level (PSL) identifies the quality, material, and testing requirements for a specific product. Equipment identified as manufactured in conformance with API 6A prior to April 1986 (API 6A, 15th Edition) is outside the scope of this document.

   
   

   This standard is not applicable to onsite repair at the equipment installation site.

   
   

2. Normative References

   
   

   The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies, except that new editions may be used on issue and shall become mandatory upon the effective date specified by the publisher or six months from the date of the revision (where no effective date is specified).

   
   

   API Specification 6A, Specification for Wellhead and Tree Equipment

   
   

   API Standard 18LCM, Product Life Cycle Management System Requirements for the Petroleum and Natural Gas Industries, 2017

   
   

   API Specification 20E, Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries API Specification 20F, Corrosion-resistant Bolting for Use in the Petroleum and Natural Gas Industries ASME 1 B.18.2.9, Straightness Gage and Gaging for Bolts and Screws

   ASTM 2 F788, Standard Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series

   
   

   ASTM F812, Standard Specification for Surface Discontinuities of Nuts, Inch and Metric Series

   
   

3. Terms, Definitions and Abbreviated

3.1 Terms and Definitions

For the purposes of this standard, the terms and definitions given in API 6A and the following shall apply. When identical terms are identified in API 6A and this standard, the following definitions shall apply.

3.1.1

certificate of conformance

Document containing the statement by the manufacturer or repairer/remanufacturer certifying that the equipment, repair, rework, or remanufacture meets the requirements of this standard.

1 American Society of Mechanical Engineers, Two Park Avenue, New York, New York 10016, www.asme.org.

2 ASTM International, 100 Barr Harbor Drive, West Conshohocken, Pennsylvania 19428, www.astm.org.

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