1、 DEUTSCHE NORM June 2006DIN EN ISO 21787 ICS 23.060.10 Supersedes: see below Industrial valves Globe valves of thermoplastics materials (ISO 21787:2006) English version of DIN EN ISO 21787:2006-06 Industriearmaturen Ventile aus Thermoplasten (ISO 21787:2006) Englische Fassung DIN EN ISO 21787:2006-0
2、6 Together with DIN EN ISO 16135:2006-06, DIN EN ISO 16136:2006-06, DIN EN ISO 16137:2006-06, DIN EN ISO 16138:2006-06 and DIN EN ISO 16139:2006-06 supersedes DIN 3441-1:1989-05 and DIN 3442-1:1987-05; supersedes DIN 3441-4:1978-06 Document comprises 20 pages No part of this standard may be reproduc
3、ed without prior permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen). English price group 11 www.din.de www.beuth.de !,o9“11.06 9762290DIN EN ISO 21787:2006-06 2 National foreword T
4、his standard has been published in accordance with a decision taken by CEN/TC 69 to adopt, without alteration, International Standard ISO 21787 as a European Standard. The responsible German body involved in its preparation was the Normenausschuss Armaturen (Valves Standards Committee), Technical Co
5、mmittee NAA-69/16 Kunststoffarmaturen. Amendments This standard differs from DIN 3441-1:1989-05, DIN 3441-4:1978-06 and DIN 3442-1:1987-05 as follows: The content has been fully revised, re-structured, and harmonized with design standards for other types of valve. In particular, the scope has been e
6、xtended to include valves of the materials ABS, PE, PP, PVC-C and PVDF, for all materials, the pressure/temperature rating is now specified for the complete valve, nominal size DN 10 has been dropped and the range of nominal sizes has been extended up to DN 150, nominal pressures PN 6, PN 10, PN 16
7、and class 150 have been introduced, dimensions other than face-to-face dimensions and joint dimensions are no longer specified, the number of possible valve end connections has been extended, material requirements have been harmonized with those specified in European material standards, design chara
8、cteristics and functional characteristics are now specified, and more test procedures are covered, Annex ZA (informative) on the relationship between EU Directive 97/23/EC (Pressure Equipment Directive) and this standard has been included, and manufacturing requirements (testing of raw materials, pe
9、rmanent jointing by means of welding or cementing) and requirements regarding storage and transportation are now included. Previous editions DIN 3441-1: 1975-02, 1982-07, 1989-05 DIN 3441-4: 1978-06 DIN 3442-1: 1980-10, 1987-05 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 21787 March 200
10、6 ICS 23.060.10 English Version Industrial valves - Globe valves of thermoplastics materials (ISO 21787:2006) Robinetterie industrielle - Robinets soupape en matriaux thermoplastiques (ISO 21787:2006) Industriearmaturen - Ventile aus Thermoplasten (ISO 21787:2006) This European Standard was approved
11、 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 European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national stand
12、ards 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 by translation under the responsibility of a CEN member into its own language and notified to
13、the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, No
14、rway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any fo
15、rm and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 21787:2006: EEN ISO 21787:2006 (E) 2 Foreword This document (EN ISO 21787:2006) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”, the secretariat of which is held by AFNOR, in collaboration with Te
16、chnical 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 latest by September 2006, and conflicting national standards s
17、hall 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 relationship with EU Directive(s), see informative Annex ZA,
18、 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 Republic, Denmark, Estonia, Finland, France, Germany, Greece,
19、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 21787:2006 (E) 3 Contents Page Foreword .2 1 Scope4 2 Normative references4 3 Terms and definitions .5 4
20、Requirements.7 4.1 Design.7 4.2 Materials .8 4.3 Pressure/temperature rating 8 4.4 Dimensions 10 4.5 Operation10 4.6 Functional characteristics10 4.7 Manufacture .11 4.8 Other requirements .12 5 Test procedures.12 5.1 Documentation of test results12 5.2 Initial type tests .12 6 Declaration of compli
21、ance13 7 Designation 14 8 Marking and preparation for storage and transportation14 8.1 Marking and documentation 14 8.2 Preparation for storage and transportation15 Annex A (informative) Procurement information.16 Bibliography17 Annex ZA (informative) Relationship between this International Standard
22、 and the Essential Requirements of EU Directive 97/23 EC (PED).18 EN ISO 21787:2006 (E) 4 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,
23、 their connection to the pipe system, the body materials and their pressure/temperature rating between 40 C and + 120 C, 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,
24、 irrespective of the field of application and the fluids to be conveyed. NOTE 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 Standar
25、d is concerned with the range of DN DN 10; DN 15, DN 20, DN 25, DN 40, DN 50, 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
26、dated references, only the edition cited applies. For undated references, the 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, Pi
27、pe threads where pressure-tight joints are not made on the threads Part 1: 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 attachm
28、ents ISO 8233:1988, Thermoplastics valves Torque Test method ISO 8659:1989, 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, Pl
29、astics pipes and fittings Combined chemical-resistance classification table ISO 10931:2005, Plastics piping systems for industrial applications Poly(vinylidene fluoride) (PVDF) Specifications for components and the system EN ISO 21787:2006 (E) 5 ISO 12092:2000, Fittings, valves and other piping syst
30、em components, made of unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly(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 f
31、or pipes and fittings for pressure applications Classification and designation Overall 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 chlorid
32、e) (PVC-C) Specifications for components and the system Metric series ISO 15494:2003, 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
33、 and centre-to-face dimensions of metal valves for use in flanged pipe systems Part 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 Pa
34、rt 1: Definition of types of valves EN 736-2:1997, Valves Terminology Part 2: Definition 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:
35、Steel flanges EN 1267:1999, Valves Test of flow resistance using water as test fluid 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 therm
36、oplastics fittings, valves and ancillary equipment Determination of the long-term 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 Mandator
37、y requirements EN 12570:2000, Industrial valves Method for sizing the operating 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 m
38、aterials are given in ISO 15493, ISO 15494 and ISO 10931. 3.1 nominal size DN alphanumeric 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 siz
39、e, in millimetres, of the bore or outside diameter of the end connections ISO 6708:1995, definition 2.1 EN ISO 21787:2006 (E) 6 3.2 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
40、same nominal size (DN) designated by the same PN number have the same mating dimensions 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 corr
41、esponding standards. ISO 7268:1983, Clause 2 3.3 Class alphanumeric designation used for 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 n
42、umber following the word “Class” does not represent a measurable value and is not intended 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
43、 is capable of withstanding in service EN 805:2000, definition 3.1.1 NOTE EU Directive 97/23/EC (PED) designates PS (maximum allowable pressure) irrespective of temperature. The values of PMA and PS are identical at 20 C. 3.5 trim inside parts of the valve in contact with the fluid NOTE Adapted from
44、 EN 736-2:1997, definition 3.2. 3.6 rating factor frrating factor used in the relationship between PMA and PN or Class and to calculate the PMA at temperatures other than 20 C 3.7 manual forces F and Fsoperating manual force (F) and maximum manual force (Fs) which one person is capable of applying t
45、o the manual operating element of a valve NOTE Adapted from EN 12570:2000. EN ISO 21787:2006 (E) 7 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 designed to be used for control service. 4.
46、1.2 Design characteristics Valves shall have the following design characteristics: a) in accordance with EN 736-3, a body bore that is either full bore i.e. not less than 90 % of DN expressed in millimetres (mm), or reduced bore, in which case the manufacturer shall declare the pressure loss factor
47、of the valve. b) a valve obturation suitable for one or both flow directions; c) if the tight obturation is possible in one flow direction only, then this shall be marked by an arrow on the body exterior as specified in Table 2, item 10; d) a spindle that shall be fixed in the body and blow-out proo
48、f according to EN 736-3, and shall have a stem sealing system by a stuffing box or by self-sealing elements. Valves may have the following design characteristic: a soft seat design of obturation. 4.1.3 Types of valve end connection The types of valve end connection can be chosen from the following a
49、lternatives: butt fusion ends; spigot ends for cementing or for welding; socket ends for electro-fusion; socket ends for heated tool welding; socket ends for cementing; socket ends for/with elastomeric seal rings; flanged ends; wafer type ends; threaded ends; union ends. EN ISO 21787:2006 (E) 8 Other types of end connection are possible. All valve ends shall be an integral part of, or threaded onto, the valve body. Different
