1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication BS ISO 7005-1:2011 Pipe flanges Part 1: Steel flanges for industrial and general service piping systemsBS ISO 7005-1:2011 BRITISH STANDARD National foreword This British Stand
2、ard is the UK implementation of ISO 7005-1:2011. The UK participation in its preparation was entrusted to Technical Committee PSE/15, Flanges. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the neces
3、sary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 56220 4 ICS 23.040.60 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strate
4、gy Committee on 31 August 2011. Amendments issued since publication Date Text affectedBS ISO 7005-1:2011Reference number ISO 7005-1:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 7005-1 Second edition 2011-07-15 Pipe flanges Part 1: Steel flanges for industrial and general service piping systems Brides
5、de tuyauteries Partie 1: Brides en acier pour systmes de canalisations industrielles et dutilisation gnrale BS ISO 7005-1:2011 ISO 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 fo
6、rm or by any means, electronic 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
7、 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 All rights reservedBS ISO 7005-1:2011 ISO 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 dat
8、a5 5 Process.6 6 Pressure limits.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 7005-1:2011 ISO 7005-1:2011(E) iv ISO 2011 All rights reser
9、vedForeword 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
10、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 matt
11、ers 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 circul
12、ated 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 responsib
13、le for identifying any or all such 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 te
14、chnically revised. ISO 7005 consists 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 allo
15、y and composite flanges BS ISO 7005-1:2011 ISO 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 withi
16、n these regional entities. Each of 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 ed
17、ition did not achieve the anticipated 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/tem
18、perature ratings. In addition, dimensional 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 p
19、rominence. With this revision, normative 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
20、needs by providing ready access to a sectorial series whose requirements are contemporaneous with regional imperatives. BS ISO 7005-1:2011BS ISO 7005-1:2011 INTERNATIONAL STANDARD ISO 7005-1:2011(E) ISO 2011 All rights reserved 1Pipe flanges Part 1: Steel flanges for industrial and general service p
21、iping systems 1 Scope This part of 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 res
22、ponsibility for the selection of a 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
23、, petroleum refinery, loading terminal, 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 interco
24、nnects individual pieces or stages 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 docum
25、ents 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 document (including any amendments) applies. EN 1092-1, Flanges and their joints Circular flanges for pipes, valves, fitting
26、s and accessories PN designated Part 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, th
27、e following terms and definitions apply. 3.1 ambient temperature temperature of the surrounding atmosphere in the immediate vicinity of the flange used in a piping system BS ISO 7005-1:2011 ISO 7005-1:2011(E) 2 ISO 2011 All rights reserved3.2 design pressure most severe pressure, taking into account
28、 its corresponding temperature selected 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/te
29、mperature ratings of the reference 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 specifie
30、d by the purchaser NOTE The piping 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 indi
31、vidual or organization that takes responsibility 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
32、 as the purchaser; not to be confused 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 alphanum
33、eric designation of size, used for 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
34、following DN does not represent a measurable 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
35、 for reference purposes, which is common 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 ma
36、y be used as a size identifier without 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 7005-1:2011 ISO 7005-1:2011(E) ISO 2011 A
37、ll rights reserved 33.8 flange rating 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
38、 followed by a dimensionless number 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 d
39、esignation PN is applicable to all steel 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 P
40、N number depends on the flange material 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
41、, relating to flange pressure/temperature 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 va
42、lue and is not used for calculation 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 t
43、hat all flange end equipment of the 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 p
44、ressure/temperature ratings in the reference 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
45、of the same series having the same rating 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 o
46、r welding neck. 3.12 fluid service category 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 7005-1:2011 ISO
47、7005-1:2011(E) 4 ISO 2011 All rights 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 responsibl
48、e for the selection of gaskets or bolting. 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 pip
49、ing wall to which a flange is attached, 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
