1、BRITISH STANDARDBS EN ISO 21787:2006Industrial valves Globe valves of thermoplastics materialsThe European Standard EN ISO 21787:2006 has the status of a British StandardICS 23.060.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3
2、g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 21787:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2006 BSI ISBN 0 580 48036 4National forewordThis British Standard is the official
3、English language version of EN ISO 21787:2006. It is identical with ISO 21787:2006.The UK participation in its preparation was entrusted by Technical Committee PSE/7, Valves, to Subcommittee PSE/7/16, Plastic valves, which has the responsibility to: A list of organizations represented on this subcom
4、mittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “S
5、earch” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal
6、obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary o
7、f pagesThis document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 15 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued s
8、ince publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 21787March 2006ICS 23.060.10English VersionIndustrial valves - Globe valves of thermoplastics materials (ISO21787:2006)Robinetterie industrielle - Robinets soupape en matriauxthermoplastiques (ISO 21787:2006)
9、Industriearmaturen - Ventile aus Thermoplasten (ISO21787:2006)This European Standard was approved by CEN on 3 March 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without
10、 any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made b
11、y translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece
12、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Cent
13、re: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 21787:2006: EForeword This document (EN ISO 21787:2006) has been prepared by Technical Committee CEN/TC 69 “Industrial valves“, the secr
14、etariat of which is held by AFNOR, in collaboration with Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the lat
15、est by September 2006, and conflicting national standards shall be withdrawn at the latest by September 2006. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For r
16、elationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Re
17、public, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 21787:2006Reference numberISO 21787:2006(E)INT
18、ERNATIONAL STANDARD ISO21787First edition2006-03-15Industrial valves Globe valves of thermoplastics materials Robinetterie industrielle Robinets soupape en matriaux thermoplastiques EN ISO 21787:2006ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 R
19、equirements 4 4.1 Design 4 4.2 Materials 5 4.3 Pressure/temperature rating 5 4.4 Dimensions 7 4.5 Operation . 7 4.6 Functional characteristics . 7 4.7 Manufacture. 8 4.8 Other requirements. 9 5 Test procedures 9 5.1 Documentation of test results . 9 5.2 Initial type tests. 9 6 Declaration of complia
20、nce . 10 7 Designation . 11 8 Marking and preparation for storage and transportation. 11 8.1 Marking and documentation 11 8.2 Preparation for storage and transportation . 12 Annex A (informative) Procurement information 13Bibliography . 14 Annex ZA (informative) Relationship between this Internation
21、al Standard and the EssentialRequirement of EU Directive 97/23 EC (PED) . 15EN ISO 21787:2006iv 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 carr
22、ied 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.
23、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 Internat
24、ional 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 e
25、lements 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 21787 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 69, Industrial valves, in collaboration with ISO/TC 138
26、, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 7, Valves and auxiliary equipment of plastics materials, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). EN ISO 21787:20061Industrial valves Globe valves of thermoplas
27、tics materials 1 Scope This International Standard specifies requirements for the design, functional characteristics and manufacture of globe valves made of thermoplastics materials intended for isolating and control service, their connection to the pipe system, the body materials and their pressure
28、/temperature rating between 40 qC and 120 qC, for a lifetime of 25 years, and also specifies their tests. This International Standard is applicable to hand- or power-operated valves to be installed in industrial pipe systems, irrespective of the field of application and the fluids to be conveyed. NO
29、TE 1 Industrial pipe systems also include systems for water supply for general purposes, drainage and sewerage. NOTE 2 Special requirements can apply to pipe systems for water for human consumption. This International Standard is concerned with the range of DN DN 10; DN 15, DN 20, DN 25, DN 40, DN 5
30、0, DN 65, DN 80, DN 100, DN 125 and DN 150 and the range of PN and Class PN 6, PN 10, PN 16 and Class 150. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, t
31、he latest edition of the referenced document (including any amendments) applies. ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation ISO 228-1:2000, Pipe threads where pressure-tight joints are not made on the threads Part 1:
32、Dimensions, tolerances and designation ISO 898-1:1999, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs ISO 5210:1991, Industrial valves Multi-turn valve actuator attachments ISO 8233:1988, Thermoplastics valves Torque Test method ISO 8659:1989,
33、 Thermoplastic valves Fatigue strength Test method ISO 9393-2:2005, Thermoplastics valves for industrial applications Pressure test methods and requirements Part 2: Test conditions and basic requirements ISO/TR 10358:1993, Plastics pipes and fittings Combined chemical-resistance classification table
34、 ISO 10931:2005, Plastics piping systems for industrial applications Poly(vinylidene fluoride) (PVDF) Specifications for components and the system EN ISO 21787:20062 ISO 12092:2000, Fittings, valves and other piping system components, made of unplasticized poly(vinyl chloride) (PVC-U), chlorinated p
35、oly(vinyl chloride) (PVC-C) acrylonitrile-butadiene-styrene (ABS) and acrylonitrile-styrene-acrylester (ASA) for pipes under pressure Resistance to internal pressure Test method ISO 12162:1995, Thermoplastics materials for pipes and fittings for pressure applications Classification and designation O
36、verall service (design) coefficient ISO 15493:2003, Plastics piping systems for industrial applications Acrylonitrile-butadiene-styrene (ABS), unplasticized poly(vinyl chloride) (PVC-U) and chlorinated poly(vinyl chloride) (PVC-C) Specifications for components and the system Metric series ISO 15494:
37、2003, Plastics piping systems for industrial applications Polybutene (PB), polyethylene (PE) and polypropylene (PP) Specifications for components and the system Metric series EN 558-1:1995, Industrial valves Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems P
38、art 1: PN-designated valves EN 558-2:1995, Industrial valves Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems Part 2: Class-designated valves EN 736-1:1995, Valves Terminology Part 1: Definition of types of valves EN 736-2:1997, Valves Terminology Part 2: De
39、finition of components of valves EN 736-3:1999, Valves Terminology Part 3: Definition of terms EN 1092-1:2001, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 1: Steel flanges EN 1267:1999, Valves Test of flow resistance using water as test f
40、luid EN 1759-1:2004, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, Class designated Part 1: Steel flanges, NPS to 24 EN 12107:1997, Plastics piping systems Injection-moulded thermoplastics fittings, valves and ancillary equipment Determination of the long-ter
41、m hydrostatic strength of thermoplastics materials for injection moulding of piping components EN 12266-1:2003, Industrial valves Testing of valves Part 1: Pressure tests, test procedures and acceptance criteria Mandatory requirements EN 12570:2000, Industrial valves Method for sizing the operating
42、element 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 736-1, EN 736-2 and EN 736-3 and the following apply. NOTE Other terms and definitions relative to thermoplastics materials are given in ISO 15493, ISO 15494 and ISO 10931. 3.1 nominal size DN al
43、phanumeric designation of size for components of a pipework system, which is used for reference purposes, comprising the letters DN followed by a dimensionless whole number which is indirectly related to the physical size, in millimetres, of the bore or outside diameter of the end connections ISO 67
44、08:1995, definition 2.1 EN ISO 21787:200633.2 nominal pressure PN numerical designation relating to pressure that is a convenient round number for reference purposes NOTE 1 It is intended that all equipment of the same nominal size (DN) designated by the same PN number have the same mating dimension
45、s appropriate to the type of end connections. NOTE 2 The permissible working pressure depends upon materials, design and working temperature and is to be selected from the pressure/temperature rating tables in corresponding standards. ISO 7268:1983, Clause 2 3.3 Class alphanumeric designation used f
46、or reference purposes related to a combination of mechanical and dimensional characteristics of a component of a pipework system, which comprises the word “Class” followed by a dimensionless whole number NOTE The number following the word “Class” does not represent a measurable value and is not inte
47、nded to be used for calculation purposes except where specified in the relevant standard. 3.4 allowable maximum operating pressure PMA maximum pressure occurring from time to time, including surge, that a component is capable of withstanding in service EN 805:2000, definition 3.1.1 NOTE EU Directive
48、 97/23/EC (PED) designates PS (maximum allowable pressure) irrespective of temperature. The values of PMA and PS are identical at 20 qC. 3.5 trim inside parts of the valve in contact with the fluid NOTE Adapted from EN 736-2:1997, definition 3.2. 3.6 rating factor frrating factor used in the relatio
49、nship between PMA and PN or Class and to calculate the PMA at temperatures other than 20 qC 3.7 manual forces F and Fsoperating manual force (F) and maximum manual force (Fs) which one person is capable of applying to the manual operating element of a valve NOTE Adapted from EN 12570:2000. EN ISO 21787:20064 4 Requirements 4.1 Design 4.1.1 Valve function Globe valves in accordance with this International Standard shall be suitable for isolating service and may be
