1、UDC 621.646-036.073 : 628.1 : 531.781 DEUTSCHE NORM June 1991 Therm op I ast i cs va Ives Torque test (IS0 8233 : 1988) English version of DIN EN 28 233 I EN28233 This standard incorporates the English version of Is0 8233. Armaturen aus Thermoplasten; Drehmoment, Prfverfahren (IS0 8233 : 1988) Europ
2、ean Standard EN 28 233 : 1990 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been published in accordance with a decision taken by CEN/BT to adopt, without alteration, International Standard IS0 8233 (prepared by ISO/TC 138) as a European
3、 Standard. Involved in the preparation of this standard were the NormenausschuB Kunststoffe (Plastics Standards Committee) and the NormenausschuB Armaturen (Valves Standards Committee). The DIN Standards corresponding to the International Standards referred to in clause 2 are as follows: IS0 Standar
4、d DIN Standard IS0 161-1 DIN 8062 IS0 6708 DIN 2402 Standards referred to (and not included in References) DIN 2402 Nominal sizes of pipework; grading of sizes DIN 8062 Unplasticized polyvinyl chloride (PVC-U) pipes; dimensions International Patent Classification F 16 U 27/00 G O1 M 3/02 G O1 M 13/0
5、0 EN comprises 4 pages. Beuth Verkg GmbH. erlin. has the exdusive right of sale for German Standards (DIN-Normen). 04.93 DIN EN 28233 Engl. Price group 6 Sales No. 1 106 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 28233 December 1990 UDC 621.646-036.073 : 620.1 : 531.781 - -. Descriptors: P
6、lastics, thermoplastic resins. cock, torque, tests, test conditions. English version Th ermo pl act i cs valves Torque Test method (IS0 8233 : 1988) Robinets en matriaux thermoplastiques; couple de manuvre; mthode dessai (IS0 8233 : 1988) Armaturen aus Thermoplasten; Drehmo- ment; Prfverfahren (IS0
7、8233 : 1988) This European Standard was approved by CEN on 1990-1 1-08 and is identical to the IS0 Standard as referred to. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard with
8、out any alteration. Up-to-date lists and bibliographical references concerning such national standards 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 m
9、ade by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland. Ital
10、y, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central secretariat: nie de Stassart 36. B-1050 Brussels 8 1990. Copyright reserved to all CEN members
11、 Ref. No. EN 28 233 : 1990 E Page 2 EN 28 233 : 1990 Foreword Following the positive result of the Formal Vote, CEN/BT decided in 1990 to adopt IS0 8233 : 1988 Thermoplastics valves; torque; test method as a European Standard. In accordance with the CENKENELEC Internal Regulations. the following co
12、untries are bound to implement this European Standard: Austria. Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of the International Standard IS0 8233 :
13、1988 was approved by CEN as a European Standard without any rnodifi- cation as given above. 1 Scope This International Standard specifies a test method for the determination of the opening and closing torque of thermo- plastics valves. Page 3 EN 28 233 : 1990 6 Test conditions 2 Field of application
14、 This International Standard applies to all types of thermo- plastics valves intended to be used for the transport of fluids. 3 References IS0 161-7, Tbetmoplastics pipes for the transport of fluids - Nom b) complete identification of the valve type: - material of the valve body and seals, - nominal
15、 size (ON), socket diameter (DI) or spigot diameter d nominal outside diameter)”, - nominal pressure (PN) of the valve, - manufacturers name or trademark, - if necessary, flow direction; ci dateof test: d) recorded values of the opening and closing torque, before and after conditioning. 1) In accordance with IS0 161-1.
