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1、BRITISH STANDARD BS EN 580:1994 BS 2782-11: Method 1105D: 1994 Plastics piping systems Unplasticized poly(vinyl chloride) (PVC-U) pipes Test method for the resistance to dichloromethane at a specified temperature (DCMT) The European Standard EN 580:1993 has the status of a British Standard UDC 621.6
2、43.2-0.36.743.22:620.193.4 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:35:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 580:1994 This British Standard, having been prepared under the direction of the Plastics and Rubber Standards Policy Committee, was published under the authorit
3、y of the Standards Board and comes into effect on 15 August 1994 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference PRM/61 Draft for comment 91/48475 DC ISBN 0 580 22264 0 Cooperating organizations The European Committee for Standardization (CEN), under
4、 whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssocia
5、tion franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines
6、NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards
7、Institution Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:35:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 580:1994 BSI 08-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of
8、EN 580:19933 National annex NA (informative) Committees responsibleInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:35:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 580:1994 ii BSI 08-1999 National foreword This British Standard has been prepared under the direction
9、of the Plastics and Rubber Standards Policy Committee and is the English language version of EN 580:1993 Plastics piping systems Unplasticized poly(vinyl chloride) (PVC-U) pipes Test method for the resistance to dichloromethane at a specified temperature (DCMT), published by the European Committee f
10、or Standardization (CEN). It is incorporated into BS 2782 Methods of testing plastics Part 11: Thermoplastics pipes, fittings and valves, as Method 1105D:1994. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for th
11、eir correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover. This standard
12、has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:35:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPI
13、SCHE NORM EN 580:1993 July 1993 UDC 621.643.2-036.743.22:620.193.4 Descriptors: Plastics, pipes, polyvinyl chloride, PVC-U, tests, chemical resistance, dichloromethane, immersion, temperature, DCMT English version Plastics piping systems Unplasticized poly(vinyl chloride) (PVC-U) pipes Test method f
14、or the resistance to dichloromethane at a specified temperature (DCMT) Systmes de canalisations en plastiques Tubes en poly(chlorure de vinyl) non-plastifi (PVC-U) Mthode dessai de la rsistance au dichloromthane une temprature spcifie (DCMT) Kunststoff-Rohrleitungssysteme Rohre aus weichmacherfreiem
15、 Polyvinylchlorid (PVC-U) Prfverfahren fr die Bestndigkeit gegen Dichlormethan bei einer festgelegten Temperatur (DCMT) This European Standard was approved by CEN on 1993-06-25. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this E
16、uropean Standard the status of a national standard without 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 (Engl
17、ish, 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 the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, F
18、inland, France, Germany, Greece, Iceland, Ireland, Italy, 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: rue de Stassart 36, B-1050
19、 Brussels 1993 Copyright reserved to CEN members Ref. No. EN 580:1993 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:35:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 580:1993 BSI 08-1999 2 Foreword This standard was prepared by CEN/TC 155 “Plastics piping systems and ducting systems”
20、. This standard is based on the draft Technical Report ISO/DTR 9852 “Unplasticized polyvinyl chloride (PVC-U) pipes Dichloromethane resistance temperature (DCMT) Test method and basic specification” prepared by the International Organization for Standardization (ISO). It is a modification of ISO/DTR
21、 9852 for reasons of alignment with texts of other standards on test methods. 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 January 1994, and conflicting national standards shall be withdrawn at
22、 the latest by January 1994. The modifications are: no product requirements are given; editorial changes have been introduced. Annex A, which is informative, gives a basis for describing the amount of attack. The material-dependent test parameters and/or performance requirements are incorporated in
23、the referring standard(s). No existing European Standard is superseded by this standard. This Standard was approved and in accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European standard: Austria, Belgium, Denmark, Finland, France, Germany,
24、 Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Principle3 3Reagent3 4Apparatus3 5Preparation of the test piece3 6Immersion conditions3 7Procedure4 8Expression of results4 9Test re
25、port4 Annex A (informative) Description of attack5 Figure A.15 Table 13 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:35:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 580:1993 BSI 08-19993 Introduction The maximum temperature at which the unplasticized poly(vinyl chloride) (PVC-U) pip
26、e is not attacked by dichloromethane gives an indication of the level and homogeneity of gelation of the pipe. This characteristic is related to the mechanical properties and, in particular, the long-term pressure resistance of the pipe. 1 Scope This standard specifies a method for determining the r
27、esistance of unplasticized poly(vinyl chloride) (PVC-U) pipes to dichloromethane at a specified temperature (DCMT). This standard is applicable to PVC-U pipes, irrespective of their use. The method can be used as a rapid means of quality control during manufacture. NOTEThe temperature of the dichlor
28、omethane at which PVC-U shall not be attacked, is specified in the referring standard. 2 Principle A piece of PVC-U pipe, of specified length, chamfered at one end to an angle dependent on its thickness, is immersed for (30 1) min in dichloromethane at a specified temperature to verify that the PVC-
29、U is not attacked at that temperature. NOTE 1If the PVC-U has not sufficiently gelled, whitening of the surface will occur and, in the worst case, a precipitate will be observed. NOTE 2It is assumed that the following test parameters are specified in the standard making reference to this standard: a
30、) the control temperature, T, for the dichloromethane (see 4.2 and 6.3); b) the minimum wall thickness for which the test shall be applied. 3 Reagent Dichloromethane, technical grade. WARNING. The boiling temperature of dichloromethane is low (40 C). Consequently, it has a high vapour pressure at am
31、bient temperature. Further, it can be toxic to skin and eyes. It is, therefore, necessary to take precautions when handling dichloromethane or test pieces which have been immersed in it. The vapours are also toxic: the threshold limit value (T.L.V.) comparable to the maximum admissible concentration
32、 (M.A.C.) is 100 ml/m3(ppm). Ventilation of the room or the area in which the container is placed and where the drying of the test piece takes place is, therefore, essential. NOTEDichloromethane, technical grade, contains small quantities (1 % maximum each) of chloromethane (CH3Cl), of trichlorometh
33、ane (CHCl3) and of tetrachloromethane (CCl4). It has been noted that even if the level of these impurities were to attain 5 % in total, the results would not be significantly different. 4 Apparatus 4.1 Chamfering machine (see 5.2). 4.2 Glass or stainless steel container, of suitable dimensions to ac
34、commodate one or more test pieces (see clause 5), with a grating maintained at approximately 10 mm above the bottom of the container, a lid to limit evaporation of the liquid (see 6.1 and 6.2) and thermostatic control, with stirrer, capable of maintaining the temperature of the liquid at (T 0,5) C w
35、ith help of the refrigeration equipment (4.3). 4.3 Refrigeration equipment, capable of cooling the dichloromethane to the temperature as specified in the referring standard. 4.4 Hood fitted with a fume extraction system, for safety reasons (see warning in clause 3) mounted over the container (4.2).
36、5 Preparation of the test piece 5.1 Cut from the pipe to be tested a test piece 160 mm in length, such that the cut ends are perpendicular to the axis of the pipe. 5.2 Chamfer, by cutting without tangible heating (see note), one of the ends of the test piece over its complete thickness. The angle of
37、 chamfer depends on the thickness of the pipe as given in Table 1 see item b) of note 2 to clause 2. NOTEThe term “cutting” is intended to exclude grinding. Table 1 5.3 Cool the test piece to ambient temperature. 6 Immersion conditions 6.1 Fill the container with sufficient dichloromethane of known
38、refractive index to immerse the necessary portion of the test piece (see 7.2). 6.2 Cover the dichloromethane with a layer of water, not less than 20 mm deep. NOTEThe water layer is for the purpose of reducing evaporation normally 0,6 l/m2h at (23 2) C of the dichloromethane and to protect the operat
39、or from any harmful effects of the vapour. The water used for the test should be disposed of only in accordance with the relevant legislation. Pipe wall thickness (e) mm Chamfering angle degrees e 8 8 k e 16 16 k e 10 20 30 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:35:59 GMT+00:00 20
40、06, Uncontrolled Copy, (c) BSI EN 580:1993 4 BSI 08-1999 6.3 Using the temperature controls, refrigeration equipment and stirrer as appropriate, establish and maintain the temperature of the dichloromethane in the container at (T 0,5) C see item a) of note 2 to clause 2. 6.4 Maintain the level of di
41、chloromethane in the container. 6.5 Ensure that the refractive index of the dichloromethane does not vary in service by more than 0,002 from its initial value. NOTEIn practice, the refractive index varies by 0,0005 every 3 months when some 700 to 800 tests are carried out per month. A check on the q
42、uality of the bath every 3 months should suffice. 7 Procedure 7.1 For the duration of the test, avoid touching the test piece with fingers (see warning in clause 3), e.g. by using tongs and gloves. 7.2 Place the test piece in the liquid so that the chamfered zone is completely immersed in the dichlo
43、romethane. 7.3 Leave the test piece for (30 1) min in the dichloromethane. 7.4 Remove the test piece from the container and leave it to dry in the air for at least 15 min in a well ventilated area or under a hood equipped with a ventilation system. 7.5 Examine the test piece and determine the result
44、s in accordance with clause 8. 8 Expression of results 8.1 If the test piece shows no sign of attack anywhere (other than swelling), express the result as “No attack”. 8.2 If the test piece shows signs of attack anywhere, express the result as “Attacked” and describe the appearance and location of t
45、he attack. NOTEFor a possible description of the attack on the chamfer, see Annex A. 9 Test report The test report shall include the following information: a) a reference to this standard and to the referring standard; b) complete identification of the pipe under test; c) the temperature, T, of the
46、dichloromethane bath; d) the immersion time; e) the number of test pieces under test; f) the results of the test and any associated information; g) any factors which may have affected the results, such as any incidents or any operating details not specified in this standard; h) the date of test. Lic
47、ensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:35:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 580:1993 BSI 08-19995 Annex A (informative) Description of attack In the case of attack, it is possible to express the result as a percentage of the total chamfer surface (see Figure A.1) in tw
48、o aspects as follows: a) percentage attack in the direction of the chamfer, i.e. where: a is the average dimension of the attacked zone in the axial direction on the chamfer surface; c is the width of the chamfer; b) percentage attack in the circumferential direction, i.e. where: b is the average di
49、mension of the attacked zone in the circumferential direction on the chamfer surface; D is the outside diameter of the pipe. The rounding interval for the result shall be 5. Figure A.1 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:35:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:35:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 580:1994 BSI 08-1999 National annex NA (informative) Committees responsible The United Ki