1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 7005-1:2011Pipe flangesPart 1: Steel flanges for industrial andgeneral service piping systemsBS ISO 7005-1:2011 BRITISH STANDARDNational forewordThis British Standard is t
2、he UK implementation of ISO 7005-1:2011.The UK participation in its preparation was entrusted to TechnicalCommittee PSE/15, Flanges.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovision
3、s of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 56220 4ICS 23.040.60Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 Au
4、gust 2011.Amendments issued since publicationDate Text affectedBS ISO 7005-1:2011Reference numberISO 7005-1:2011(E)ISO 2011INTERNATIONAL STANDARD ISO7005-1Second edition2011-07-15Pipe flanges Part 1: Steel flanges for industrial and general service piping systems Brides de tuyauteries Partie 1: Brid
5、es en acier pour systmes de canalisations industrielles et dutilisation gnrale BS ISO 7005-1:2011ISO 7005-1:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
6、 or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org We
7、b www.iso.org Published in Switzerland ii ISO 2011 All rights reservedBS ISO 7005-1:2011ISO 7005-1:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Purchaser specification data5 5 Process.6 6 Pressure limit
8、s.6 7 Material .7 8 Application considerations 7 9 Other considerations for specification .8 10 Installation guidance.8 Annex A (informative) Information to be specified by the purchaser9 Bibliography10 BS ISO 7005-1:2011ISO 7005-1:2011(E) iv ISO 2011 All rights reservedForeword ISO (the Internation
9、al 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 e
10、stablished 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 standard
11、ization. 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 vo
12、ting. 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 su
13、ch patent rights. ISO 7005-1 was prepared by Technical Committee ISO/TC 5, Ferrous metal pipes and metallic fittings, Subcommittee SC 10, Metallic flanges and their joints. This second edition cancels and replaces the first edition (ISO 7005-1:1992), which has been technically revised. ISO 7005 cons
14、ists of the following parts, under the general title Pipe flanges: Part 1: Steel flanges for industrial and general service piping systems It also consists of the following parts, under the general title, Metallic flanges: Part 2: Cast iron flanges Part 3: Copper alloy and composite flanges BS ISO 7
15、005-1:2011ISO 7005-1:2011(E) ISO 2011 All rights reserved vIntroduction This part of ISO 7005 makes normative reference to a family of two distinct steel flange series, each of which has sectorial relevance in noteworthy global marketplaces. Each is widely used within these regional entities. Each o
16、f these individual flange series, taken separately, represents a very large installed flange population and as such, it is not an economically viable option to compel replacement with a single flange series. The steel flange harmonization specified in the previous edition did not achieve the anticip
17、ated market acceptance. This can be attributed firstly to the fact that this part of ISO 7005 has not, prior to this revision, been updated and, secondly, that this part of ISO 7005 lacked normative requirements for many materials and their corresponding pressure/temperature ratings. In addition, di
18、mensional compromises made during the drafting of the previous edition have not been acknowledged in important market sectors. While this part of ISO 7005 remained unchanged for many years, sectorial flange standards have kept pace and by doing so maintained market prominence. With this revision, no
19、rmative reference requirements are added for the two most prominent sectorial flange series, each endowed with significant market presence. The revision of this part of ISO 7005 is intended to more readily accommodate and expand regional and national standardization needs by providing ready access t
20、o a sectorial series whose requirements are contemporaneous with regional imperatives. BS ISO 7005-1:2011BS ISO 7005-1:2011INTERNATIONAL STANDARD ISO 7005-1:2011(E) ISO 2011 All rights reserved 1Pipe flanges Part 1: Steel flanges for industrial and general service piping systems 1 Scope This part of
21、 ISO 7005 establishes a base specification for pipe flanges suitable for general purpose and industrial applications including, but not limited to, chemical process industries, electric power generating industries, petroleum and natural gas industries. It places responsibility for the selection of a
22、 flange series with the purchaser. It is applicable to flanges within facilities engaged in the processing or handling of a wide variety of fluids, including steam, pressurized water and chemical, petroleum, natural gas or related products. EXAMPLE Steam power plant, petroleum refinery, loading term
23、inal, natural gas processing plant (including liquefied natural gas facilities), offshore oil and gas production platforms, chemical plant, bulk plant, compounding plant, tank farm. This part of ISO 7005 is also applicable to packaged equipment piping, which interconnects individual pieces or stages
24、 of equipment within a packaged equipment assembly for use within facilities engaged in the processing or handling of a variety of fluids, including steam and chemical, petroleum, natural gas or related products. 2 Normative references The following referenced documents are indispensable for the app
25、lication 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. EN 1092-1, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories PN designated Pa
26、rt 1: Steel flanges ANSI/ASME B16.5, Pipe Flanges and Flanged Fittings NPS 1/2 through NPS 24 Metric/Inch Standard ANSI/ASME B16.47, Large Diameter Steel Flanges NPS 26 Through NPS 60 Metric/Inch Standard 3 Terms and definitions For the purposes of this document, the following terms and definitions
27、apply. 3.1 ambient temperature temperature of the surrounding atmosphere in the immediate vicinity of the flange used in a piping system BS ISO 7005-1:2011ISO 7005-1:2011(E) 2 ISO 2011 All rights reserved3.2 design pressure most severe pressure, taking into account its corresponding temperature sele
28、cted for the design of the piping to which the flange is attached NOTE The piping design pressure, taking into account the flange material and its application temperature, is not permitted to exceed the maximum allowable pressure listed in the tables of pressure/temperature ratings of the reference
29、flange standard. 3.3 design temperature maximum temperature, at design pressure, likely to be reached in operation as either the temperature of the flowing fluid or the temperature at the mid-thickness of the piping wall to which the flange is attached, as specified by the purchaser NOTE The piping
30、design temperature, taking into account the flange material and its application pressure, is not permitted to exceed the maximum allowable temperature listed in the tables of pressure/temperature ratings of the reference flange standard. 3.4 fabricator erector individual or organization that takes r
31、esponsibility for fabrication or installation of piping in accordance with the owners piping engineering design specification and in accordance with the requirements of the governing piping code or standard NOTE When so designated by the owner, he may be recognized as the purchaser; not to be confus
32、ed with a flange manufacturer. 3.5 flanged joint joint that is composed of interrelated components (flanges, gasket and bolting), which are assembled with good practice to provide both mechanical strength and leaktightness 3.6 flange nominal size PN series alphanumeric designation of size, used for
33、reference purposes, which is common for components used in a piping system, comprising the letters DN followed by a dimensionless number indirectly related to the physical size of the bore or outside diameter of the end connection, as appropriate NOTE 1 The number following DN does not represent a m
34、easurable value and is not used for calculation purposes. The use of the prefix DN is applicable to steel flanges bearing PN designations. NOTE 2 Adapted from ISO 6708:1995, definition 2.1. 3.7 flange nominal size class series alphanumeric designation of size, used for reference purposes, which is c
35、ommon for components used in a piping system, comprising the letters NPS followed by a dimensionless number having an indirect correspondence to the physical size of the bore or outside diameter of the end connection, as appropriate NOTE The dimensionless number may be used as a size identifier with
36、out the prefix NPS. This size identification number does not represent a measurable value and is not used for calculation purposes. The use of the prefix NPS is applicable to steel flanges bearing class designations. BS ISO 7005-1:2011ISO 7005-1:2011(E) ISO 2011 All rights reserved 33.8 flange ratin
37、g designation PN series alphanumeric designation that is used for reference purposes, relating to flange pressure/temperature capability, taking into account flange material mechanical properties and component dimensional characteristics, comprising the letters PN followed by a dimensionless number
38、NOTE 1 The number following the letters PN does not represent a measurable value and is not used for calculation purposes except where specified in a relevant standard. Reference to PN is meaningful only when it is related to a relevant component. The use of the designation PN is applicable to all s
39、teel flanges bearing nominal size designations DN. NOTE 2 It is the intent that all flange end equipment of the same nominal size (DN) designated by the same PN number have compatible mating dimensions. NOTE 3 The maximum allowable pressure for a flange having a PN number depends on the flange mater
40、ial and its application temperature and is to be found in tables of pressure/temperature ratings in the reference flange standard. NOTE 4 Adapted from ISO 7268. 3.9 flange rating designation class series alphanumeric designation that is used for reference purposes, relating to flange pressure/temper
41、ature capability, taking into account flange material mechanical properties and component dimensional characteristics comprising a dimensionless number that is frequently preceded by the word “class” NOTE 1 The designation number does not represent a measurable value and is not used for calculation
42、purposes except where specified in a relevant standard. Reference to a class is meaningful only when it is related to a relevant component. The use of the designation class is applicable to all steel flanges bearing size designations NPS. NOTE 2 It is the intent that all flange end equipment of the
43、same nominal size (NPS) designated by the same class number have compatible mating dimensions. NOTE 3 The maximum allowable pressure for a flange having a class number depends on the flange material and its application temperature and is to be found in tables of pressure/temperature ratings in the r
44、eference flange standard. 3.10 flange series series classification system for flange designs having a common derivation NOTE 1 This part of ISO 7005 specifics flanges of two series: PN series and class series. NOTE 2 It is the intent that all flange end equipment of the same series having the same r
45、ating designation and the same nominal size have compatible mating dimensions. 3.11 flange style style name used within a flange series for designating dimensional features usually relating to an attachment method EXAMPLE Threaded, socket, slip-on, lapped, blind or welding neck. 3.12 fluid service c
46、ategory category concerning the application of a piping system, considering the combination of fluid properties, operating conditions and other factors which establish the basis for design of the piping system as determined by the purchaser BS ISO 7005-1:2011ISO 7005-1:2011(E) 4 ISO 2011 All rights
47、reserved3.13 manufacturer individual or organization that takes responsibility for the manufacture of flanges in accordance with the purchasers instructions and in accordance with the requirements of this part of ISO 7005 NOTE 1 The manufacturer is not responsible for the selection of gaskets or bol
48、ting. NOTE 2 If a manufacturer employs subcontractors for certain tasks, he is deemed to retain full control over their work. NOTE 3 Adapted from ISO 15649. 3.14 minimum application temperature lowest temperature of the flowing fluid at the mid-thickness of a piping wall to which a flange is attache
49、d, as determined by the purchaser 3.15 minimum application temperature when specified by the user it may be the lowest service temperature at the mid-thickness of a piping wall to which a flange is attached 3.16 owner individual or organization responsible for establishing the requirements for design, construction, examination, inspection and testing that govern the fluid handling or process facility of which the flanges is part NOTE The owner is responsible for the selection of gaskets and bolting as well as the asse
