Standard for Actuator Sizing and Mounting Kits for Pipeline Valves

ANSI/API STANDARD 6DX FIRST EDITION, OCTOBER 2012

ISO 12490:2011 (Identical), Petroleum and natural gas industries—Mechanical integrity and sizing of actuators and mounting kits for pipeline valves

Standard for Actuator Sizing and Mounting Kits for Pipeline Valves

Upstream Segment

ANSI/API STANDARD 6DX FIRST EDITION, OCTOBER 2012

ISO 12490:2011 (Identical), Petroleum and natural gas industries—Mechanical integrity and sizing of actuators and mounting kits for pipeline valves

Special Notes

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Users of this Standard 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.

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Copyright © 2012 American Petroleum Institute

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.

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 order to conform to the specification.

This document was produced under API standardization procedures that ensure appropriate notification and participation 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, 1220 L Street, NW, Washington, DC 20005. Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director.

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Suggested revisions are invited and should be submitted to the Standards Department, API, 1220 L Street, NW, Washington, DC 20005, standards@api.org.

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Contents Page

API Foreword ii

Foreword v

Introduction vi

1. Scope. 1

2. Conformance 1

   1. Units of measurement 1

   2. Rounding 1

   3. Compliance with this International Standard 1

3. Normative references 2

4. Terms and definitions 3

5. Symbols and abbreviated terms 6

   1. Symbols 6

   2. Abbreviated terms 6

6. Actuator types and configurations 7

   1. General 7

   2. Actuator types 7

   3. Actuator configuration 20

   4. Action on loss of supply energy 21

7. Design 21

   1. General 21

   2. Pressure-containing parts 23

   3. Bolting and tie rod design 24

   4. Mechanically loaded parts 24

   5. Springs and modules 24

   6. Mounting kit 24

   7. Stem extensions 25

   8. Lifting 25

   9. Handwheels and levers for manual override 25

   10. Locking devices 26

   11. Position indicators 26

   12. Travel stops 26

   13. Orientation 26

   14. Sealing 26

   15. Over-pressure protection 26

   16. Design documents 26

8. Sizing 26

   1. Information required for actuator sizing 26

   2. Sizing method 28

9. Instrumentation/regulation 28

   1. Torque limiting settings — Electric actuators 28

   2. Torque/thrust limiting controls — Pneumatic/hydraulic actuators 29

10. Materials 29

    1. Material specification 29

    2. Service compatibility 29

    3. Composition limits 29

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    4. Toughness test requirements for pressure-containing parts 30

    5. Bolting for pressure-containing, mechanically loaded parts and mounting kits 31

    6. Mechanically loaded parts 31

    7. Sour service 31

11. Welding 31

    1. Welding of pressure-containing parts 31

    2. Structural welding 31

    3. Impact testing 32

    4. Hardness testing 33

    5. Repair 33

12. Quality control 33

    1. NDE requirements 33

    2. Measuring and test equipment 34

    3. Qualification of inspection and test personnel 34

    4. NDE of repairs 35

    5. Visual inspection of castings 35

13. Testing 35

    1. General 35

    2. Shell test 35

    3. Piston seal test 36

    4. Torque/thrust test — Pneumatic/hydraulic actuators 36

    5. Testing of electric actuators 36

    6. Actuator functional test 37

14. Surface protection 37

15. Marking 38

16. Preparation for shipment 38

17. Documentation 39

Annex A (informative) Supplementary test requirements 40

Annex B (informative) Optional documentation 41

Annex C (informative) Purchasing guidelines 42

Annex D (normative) Record retention 45

Annex E (informative) Typical torque/thrust curves 46

Bibliography 51

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Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 12490 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries, Subcommittee SC 2, Pipeline transporation systems.

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Introduction

It is necessary that users of this International Standard be aware that further or differing requirements can be needed for individual applications. This International Standard is not intended to inhibit a vendor from offering, or the purchaser from accepting, alternative equipment or engineering solutions for the individual application. This can be particularly applicable where there is innovative or developing technology. Where an alternative is offered, it is the responsibility of the vendor to identify any variations from this International Standard and provide details.

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API Standard 6DX/ISO 12490:2011

Petroleum and natural gas industries — Mechanical integrity and sizing of actuators and mounting kits for pipeline valves

1. Scope

   
   

   This International Standard defines the requirements for mechanical integrity and sizing of actuators used on valves manufactured under ISO 14313 and API Specification 6D.

   
   

   This International Standard is applicable to all types of electric, pneumatic and hydraulic actuators, inclusive of mounting kit, installed on pipeline valves.

   
   

   This International Standard is not applicable to actuators installed on control valves, valves being used for regulation, valves in sub-sea service, handheld powered devices, stand-alone manually operated gearboxes, instrument tubing and associated fittings and actuator control equipment.

   
   

2. Conformance

   
   

   1. Units of measurement

      
      

      In this International Standard, data are expressed in both SI units and USC units. For a specific order item, unless otherwise stated, only one system of units shall be used, without combining data expressed in the other system.

      
      

      For data expressed in SI units, a comma is used as the decimal separator and a space is used as the thousands separator. For data expressed in USC units, a dot (on the line) is used as the decimal separator and a comma is used as the thousands separator.

      
      

   2. Rounding

      
      

      Unless otherwise stated in this International Standard, to determine conformance with the specified requirements, observed or calculated values shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with ISO 80000-1:2009.

      
      

   3. Compliance with this International Standard

A quality system should be applied to assist compliance with the requirements of this International Standard.

NOTE ISO/TS 29001 gives sector-specific guidance on quality management systems.

The manufacturer shall be responsible for complying with all of the applicable requirements of this International Standard. It shall be permissible for the purchaser to make any investigation necessary in order to be assured of compliance by the manufacturer and to reject any material that does not comply.

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