1、Specification for Validation of Wellhead Surface Safety Valves and Underwater Safety Valves for Offshore ServiceAPI SPECIFICATION 6AV1 SECOND EDITION, FEBRUARY 2013Special NotesAPI publications necessarily address problems of a general nature. With respect to particular circumstances, local, state,
2、and federal laws and regulations should be reviewed.Neither API nor any of APIs 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 containe
3、d 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 APIs employees, subcontractors, consultants, or other assignees represent that use of this publication would not infringe u
4、pon privately owned rights.API publications may be used by anyone desiring to do so. Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, or guarantee in connection with this public
5、ation and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any authorities having jurisdiction with which this publication may conflict.API publications are published to facilitate the broad availability of proven, sound eng
6、ineering 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 utilized. The formulation and publication of API publications is not intended in any way to inhibit anyone from usin
7、g any other practices.Any manufacturer marking equipment or materials in conformance with the marking requirements of an API standard is 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
8、 conform to the applicable API standard.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 the
9、Publisher, API Publishing Services, 1220 L Street, NW, Washington, DC 20005.Copyright 2013 American Petroleum InstituteForewordNothing 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, o
10、r 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
11、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
12、 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, Was
13、hington, 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.Generally, API standards are reviewed and revised, reaffirmed, or withdrawn at least every five years. A one-time extension of up to two year
14、s 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, 1220 L Street, NW, Washington, DC 20005.Suggested revisions are invited and should
15、be submitted to the Standards Department, API, 1220 L Street, NW, Washington, DC 20005, standardsapi.org.iiiContentsPage1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Norma
16、tive References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Definitions and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、. . . . . 13.1 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.2 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、 . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24.2 Class II and Class III SSV/USV Valve Validation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.3 Test Agency . . . . . . . . . . . . . . . . . .
20、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.4 ValidationRequirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Test Procedures. . .
21、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125.1 Class II Validation Test Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125.
22、2 Class II Test Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135.3 Class III Validation Test Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23、 . . . . . . . 135.4 Class III Test Procedure176 Scaling of Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.1 Scaling of Class II Validation Results . . . . . . . . . . . . . . . . . . . . . . . .
24、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.2 Scaling of Class III Validation Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Annex A (informative) API Monogram Program. . . . . . . . . . . . . . . . . . . .
25、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figures1 Example Piping ArrangementTest Facility for Class
26、 II SSV/USV Valve Validation . . . . . . . . . . . . . . . . . 52 Example SSV/USV Valve Validation Section Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Class II SSV/USV Validation Summary Flow Diagram . . . . . . . . . . . . . . . . . . . . . .
27、. . . . . . . . . . . . . . . . . . . 124 Class III Validation Summary Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Tables1 Example Application SSV/USV Valve Validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28、 . . . . . . . . . . . . . . . 82 Example Class II SSV/USV Valve Test Reporting Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Example Class III SSV/USV Valve Test Reporting Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29、 114 Initial Leakage Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 Sand Slurry Flow Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30、 . . . . . . . . . . . . . 156 Sand Slurry Flow Test While Opening and Closing During Circulation . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 Initial Leakage Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31、 . . . . . . . . 178 Class III Sand Slurry Flow Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189 Class III Sand Slurry Flow Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32、. . . . . . . . . . . . . . 1910 Sand Slurry Flow Test While Opening and Closing During Circulation . . . . . . . . . . . . . . . . . . . . . . . . . . . 20v1Specification for Validation of Wellhead Surface Safety Valves andUnderwater Safety Valves for Offshore Service1 ScopeThis specification estab
33、lishes design validation requirements for API 6A surface safety/underwater safety valves (SSV/USV) and associated valve bore sealing mechanism(s) for Class II and Class III. These classes are intended for use if substances such as sand can be expected to cause an SSV/USV valve failure. Class III add
34、s requirements for the validation of the valve bonnet assembly inclusive of stem seals and may be selected by the user/purchaser. Validation to Class III also validates the same SSV/USV for Class II. NOTE Previous editions of this document included reference to and requirements for verification to P
35、R1, standard service (Class I). 2 Normative ReferencesThe following referenced documents are indispensable for the application of this specification. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)
36、 applies. API Manual of Petroleum Measurement Standards (MPMS) Chapter 10.4, Determination of Sediment and Water in Crude Oil by the Centrifuge Method (Field Procedure)API Specification 6A, Specification for Wellhead and Christmas Tree EquipmentAPI Recommended Practice 13B-1, Recommended Practice fo
37、r Field Testing Water-based Drilling Fluids3 Definitions and Abbreviations3.1 DefinitionsThe definitions below are related specifically to surface safety and underwater safety valves and are presented to define the terminology used in this specification. 3.1.1 failure Improper performance of a devic
38、e or equipment item that prevents completion of its design function.3.1.2 SSV/USV actuatorDevice that causes the SSV/USV valve to open when power is supplied and to automatically close when power is lost or released.3.1.3 SSV/USV valveSubassembly of the SSV/USV that contains the wellstream and shuts
39、 off the flow when closed.3.1.4 substantive changeChange identified by the manufacturer that affects the performance of the product in the intended service.2API SPECIFICATION 6AV13.1.5 surface safety valve SSVAutomatic wellhead valve assembly that closes upon loss of power supply.NOTE When used in t
40、his specification, the term is understood to include an SSV valve and SSV actuator. 3.1.6 test agencyIndependent third party that provides a test facility and administers a testing program that meets the SSV/USV valve validation testing requirements of this specification.3.1.7 underwater safety valv
41、eUSVAutomatic valve assembly installed at an underwater wellhead location that closes upon loss of power supply.NOTE When used in this specification, the term is understood to include a USV valve and USV actuator.3.1.8 validationConfirmation, through the provision of objective evidence (data), that
42、the requirements for a specific intended use or application have been fulfilled.NOTE Previous editions referred to this term as verification test(ing).3.1.9 valve bonnet assemblyPressure containing subassembly of SSV/USV consisting of the valve bonnet, valve stem, stem seals, and body-to-bonnet seal
43、s.3.2 AbbreviationsThe following abbreviations are used in this specification. bbl (m3) barrels (cubic meters)gpm (m3/min) gallons per minute (cubic meters per minute)PR Performance Requirement RWP rated working pressureSSV surface safety valveUSV underwater safety valve4 Validation4.1 GeneralThis s
44、ection includes the SSV/USV validation requirements for the two classes defined in Section 1 of this specification. The validation requirements in this specification are not represented as duplicating actual well conditions. 3SPECIFICATION FOR VALIDATION OF WELLHEAD SURFACE SAFETY VALVES AND UNDERWA
45、TER SAFETY VALVES FOR OFFSHORE SERVICEValidations (previously known as verifications) for PR2 sandy service or Class II that have been completed in accordance with testing requirements of API 14D or previous editions of API 6AV1 during their validity shall satisfy the requirements of API 6AV1 Class
46、II. Validation to Class III also validates the same SSV/USV for Class II in accordance with the scaling limitations in 6.1. NOTE In this edition of the specification, the term “Performance Requirement (PR)” has been replaced with “Class” (i.e. “PR2 sandy service” has now become “Class II” ). This wa
47、s done to ensure full alignment with the related terminology used in the reference document, API 6A. This is for alignment of the identification of the equipment only; no technical changes were made in the performance requirements for Class II. 4.2 Class II and Class III SSV/USV Valve Validation To
48、qualify a specific SSV/USV valve design for Class II or Class III, the manufacturer shall submit an SSV/USV valve to a test agency that meets the requirements of this specification. Any substantive change in the design or materials of construction that would affect the SSV/USV valve bore sealing mec
49、hanism shall require requalification by validation testing. A substantive change is a change identified by the manufacturer that affects the performance of the product in the intended service condition. Additionally for Class III, any substantive change to the valve bonnet assembly shall require requalification by validation testing. 4.3 Test Agency4.3.1 GeneralThe test agency shall provide a facility, personnel, written procedures, and forms to assure conformance to the requirements of this specification. The test agency shall maintain literature that includes as a minimum: a) a d
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