API STD 608-2012 Metal Ball Valves - Flanged Threaded and Welding Ends (FIFTH EDITION)《金属球阀.法兰、螺纹和焊接端》.pdf

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1、Metal Ball ValvesFlanged, Threaded, and Welding EndsAPI STANDARD 608 FIFTH EDITION, NOVEMBER 2012Metal Ball ValvesFlanged, Threaded, and Welding EndsDownstream SegmentAPI STANDARD 608 FIFTH EDITION, NOVEMBER 2012Special NotesAPI publications necessarily address problems of a general nature. With res

2、pect to particular circumstances, local, state, 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, complet

3、eness, 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 APIs employees, subcontractors, consultants, or other assignees represent t

4、hat 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 the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warra

5、nty, or guarantee in connection with this publication 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 facili

6、tate 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 utilized. The formulation and publication of API publications is not

7、 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 standard is solely responsible for complying with all the applicable requirements of that standard. API does not represent, war

8、rant, or guarantee that such products do in fact conform to the applicable API standard.Users of this Standard should not rely exclusively on the information contained in this document. Sound business, sci-entific, engineering, and safety judgment should be used in employing the information containe

9、d 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 the Publisher, API Publishing Servi

10、ces, 1220 L Street, NW, Washington, DC 20005.Copyright 2012 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, or product covered by letters pa

11、tent. 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

12、 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 co

13、ncerning 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 fo

14、r 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

15、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 be submitted to the Standards

16、Department, API, 1220 L Street, NW, Washington, DC 20005, standardsapi.org.iiiContentsPage1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Normative References. . . . . . . .

17、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Terms and Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Pressure-Tem

18、perature Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.1 Valve Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19、 . . . . . 34.2 Shell Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.3 Seat and Seal Rating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20、. . . . . . . . . . . . . . . . . . . . . . . . 35 Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45.2 Flow Passageway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45.3 Body . . . . . . . . . . . . . . .

22、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55.4 Antistatic Design (Electrical Continuity Between Ball-Stem-Body) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65.5 Ball-Stem Design and Const

23、ruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65.6 Ball Construction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65.7 Packi

24、ng Glands and Gland Bolting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65.8 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

25、 . . . . . . . . 75.9 End Flange Face Interruptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75.10 Valve Shell Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

26、. . . . . . . . . . . . . . . . . . . . . . 86 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86.1 Shell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

27、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86.2 Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96.3 Bolting. . . . . . . .

28、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96.4 Stem Seals, Body Seals, and Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

29、6.5 Identification Plate(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96.6 Threaded Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

30、. . . . . . . . . . . . . . . . . 97 Inspection, Examination, and Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97.1 Inspection and Examination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

31、. . . . . . . . . . . . . . . . . . . . . . 97.2 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97.3 Pressure Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

32、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97.4 Fire Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Marking . . . . . . . . . . . . . . . . .

33、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 Packaging and Shipping Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1010 Spare Parts . . . . .

34、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Annex A (informative) Information to Be Specified by the Purchaser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Annex B (informati

35、ve) Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figures1 Flange Face Interruption Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

36、. . . . 82 Typical Fire-resistant Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 Typical Unidirectional Valve Identification Plate Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37、 . . 12B.1 Typical Floating Ball Valve Components (One-piece Body/Unibody Illustrated)Nomenclature. . . . . . 14B.2 Typical Trunnion-mounted Ball Valve Components (Split-body Valve Illustrated)Nomenclature . . . . 15vContentsPageTables1 Minimum Seat Pressure-Temperature Ratingbar. . . . . . . . . .

38、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Minimum Seat Pressure-Temperature Ratingpsig. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Cylinder Diameter for Categorizing Bore Size . . . . . . . . . . . . . . . . . . . . . . . .

39、 . . . . . . . . . . . . . . . . . . . . . . . . . 4IntroductionThe purpose of this API standard is to establish additional design, operational, and performance requirements required by petroleum refining, petrochemical processing, and chemical processing end users that are in addition to and beyond

40、 the requirements established by ASME B16.34, ValvesFlanged, Threaded, and Welding End.API 608 is intended to provide the similar additional requirements for steel and alloy steel ball valves beyond ASME B16.34 as do the following API standards for other valve types: API Standard 594, Check Valves:

41、Flanged, Lug, Wafer and Butt-welding; API Standard 599, Metal Plug ValvesFlanged, Threaded, and Welding Ends; API Standard 600, Steel Gate Valves: Flanged and Butt-Welding Ends, Bolted Bonnets; API Standard 602, Steel Gate, Globe, and Check Valves for Sizes DN 100 and Smaller for the Petroleum and N

42、atural Gas Industries; API Standard 603, Corrosion-resistant, Bolted Bonnet Gate ValvesFlanged and Butt-welding Ends; API Standard 609, Butterfly Valves: Double-flanged, Lug- and Wafer-type.vi1Metal Ball ValvesFlanged, Threaded, and Welding Ends1 Scope1.1 This standard specifies the requirements for

43、 metal ball valves suitable for petroleum, petrochemical, and industrial applications that have: flanged ends in sizes DN 15 through DN 600 (NPS 1/2 through NPS 24); butt-welding ends in sizes DN 15 through DN 600 (NPS 1/2 through NPS 24); socket-welding ends in sizes DN 8 through DN 50 (NPS 1/4 thr

44、ough NPS 2); threaded ends in sizes DN 8 through DN 50 (NPS 1/4 through NPS 2).Corresponding to the nominal pipe sizes in ASME B36.10M.1.2 This standard applies to metal ball valves with pressure classes as follows: flanged ends in Classes 150, 300, and 600; butt-welding ends in Classes 150, 300, an

45、d 600; socket-welding ends in Classes 150, 300, 600, and 800; threaded ends in Classes 150, 300, 600, and 800.1.3 This standard establishes requirements for bore sizes described as: full bore; single reduced bore; double reduced bore.1.4 This standard applies to floating (seat-supported) ball (Figur

46、e B.1) and trunnion ball valve designs (Figure B.2). These figures are to be used only for the purpose of establishing standard nomenclature for valve componentsother floating and trunnion designs also exist.1.5 This standard establishes additional requirements for ball valves that are otherwise in

47、full conformance to the requirements of ASME B16.34, Standard Class.2 Normative ReferencesThe 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 docu

48、ment (including any amendments) applies.API Standard 598, Valve Inspection and TestingAPI Standard 607, Fire Test for Quarter-turn Valves and Valves Equipped with Non-metallic SeatsASME B1.1 1, Unified Inch Screw Threads (UN and UNR Thread Form)2 API STANDARD 608ASME B1.20.1, Pipe Threads, General P

49、urpose (Inch)ASME B16.5, Pipe Flanges and Flanged Fittings NPS 1/2 Through 24 Metric/Inch StandardASME B16.10, Face-to-Face and End-to-End Dimensions of ValvesASME B16.11, Forged Fittings, Socket-welding and ThreadedASME B16.20, Metallic Gaskets for Pipe FlangesRing-joint, Spiral-wound, and Jacketed ASME B16.25, Buttwelding EndsASME B16.34, ValvesFlanged, Threaded, and Welding EndASME B18.2.2, Square and Hex Nuts (Inch Series)ASME B36.10M, Welded and Seamless Wrought Steel PipeNACE MR 01032 2, Materials Resistant to Sulfide Stress Cracking in Corrosive Petro

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