ISO5208-2008工业用阀门金属阀门的压力试验-USB迷|专注于互联网分享

2024年3月12日发(作者：壤驷心怡)

Reference number

ISO 5208:2008(E)

ISO 2008

INTERNATIONAL

STANDARD

ISO

5208

Third edition

2008-08-01

Industrial valves — Pressure testing of

metallic valves

Robinetterie industrielle — Essais sous pression des appareils de

robinetterie métalliques

ISO 5208:2008(E)

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ISO 5208:2008(E)

iii

Contents

Page

Introduction ....................................................................................................................................................... v

1 Scope .....................................................................................................................................................1

2 Terms and definitions ...........................................................................................................................1

3 Conditions relevant to 2

3.1 Purchaser examination options ...........................................................................................................2

3.2

3.3 Closure pressure testing options ........................................................................................................3

4 Requirements for pressure testing ......................................................................................................3

4.1 Forewarning ..........................................................................................................................................3

4.2 Location .................................................................................................................................................3

4.3 Test equipment .....................................................................................................................................3

4.4 Pressure .3

4.5 3

4.6 Test fluid ................................................................................................................................................3

4.7 Test pressure ........................................................................................................................................4

4.8 Pressure tests .......................................................................................................................................4

4.9 Closure test compliance .......................................................................................................................4

4.10 Shell test ................................................................................................................................................6

4.11 Optional backseat test ..........................................................................................................................7

4.12 Closure test ...........................................................................................................................................8

4.13 Certification 9

Annex A (normative) Equivalent DN numbers ...............................................................................................12

Bibliography .....................................................................................................................................................13

ISO 5208:2008(E)

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 5208 was prepared by Technical Committee ISO/TC 153,

Valves

, Subcommittee SC 1,

Design,

manufacture, marking and testing

This third edition cancels and replaces the second edition (ISO 5208:1993) which has been technically

revised.

ISO 5208:2008(E)

Introduction

The purpose of this International Standard is the establishment of basic requirements and practices for

pressure testing valves of various configurations that are used in general purpose, power generation,

petroleum, and petrochemical or allied industry applications. The intent is to provide a consistent set of

procedural requirements and acceptance criteria that can be considered in conjunction with valve specific

standards appropriate for specific applications. Account has been taken of the valve testing requirement

needs of EN 12266 and API 598 with requirements referenced for PN designated valves for the former and

Class designated valves for the latter.

INTERNATIONAL STANDARD ISO 5208:2008(E)

Industrial valves — Pressure testing of metallic valves

1 Scope

This International Standard specifies examinations and tests that a valve manufacturer needs to act upon in