NF T54-006-2003 Plastics piping systems - Unplasticized poly(vinyl chloride) (PVC-U) pipes - Test method for the resistance to dichloromethane at a specified temperature (DCMT)《塑料管.pdf

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1、NF EN 580SEPTEMBRE 2003Ce document est usage exclusif et non collectif des clients AFNOR.Toute mise en rseau, reproduction et rediffusion, sous quelque forme que ce soit,mme partielle, sont strictement interdites.This document is intended for the exclusive and non collective use of AFNOR customers.A

2、ll network exploitation, reproduction and re-dissemination,even partial, whatever the form (hardcopy or other media), is strictly prohibited.AFNORPour : Client : 23437513le : 16/12/2014 03:51PDF created with pdfFactory Pro trial version PDF created with pdfFactory Pro trial version AFNOR 2003AFNOR

3、20031st issue 2003-09-PAFNOR2003 Allrights reservedFE113025 ISSN 0335-3931NF EN 580September 2003Classification index: T 54-006European standardFrench standardPublishedanddistributedby Association Franaise de Normalisation (AFNOR French standard institute) 11, avenue Francis de Pressens 93571 Saint-

4、Denis La Plaine Cedex Tel.: + 33 (0)1 41 62 80 00 Fax: + 33 (0)1 49 17 90 00 www.afnor.frICS: 23.040.20Plastics piping systemsUnplasticized poly(vinyl chloride) (PVC-U) pipesTest method for the resistance to dichloromethaneat a specified temperature (DCMT)F :Systmes de canalisations en plastiques Tu

5、bes en poly(chlorure de vinyle) non plastifi Mthode dessai de la rsistance au dichloromthane une temprature spcifie (DCMT)D :Kunststoff-Rohrleitungssysteme Rohre aus weichmacherfreiem Polyvinylchlorid (PVC-U) Prfverfahren fr die Bestndigkeit gegen Dichlormethan bei einer festgelegten Temperatur (DCM

6、T)French standard approved by decision of the Director General of AFNOR on August 5, 2003, taking effect onSeptember 5, 2003.Replaces approved standard NF EN 580, dated December 1993.Correspondence The European standard EN 580:2003 has the status of French standard.Analysis This document specifies a

7、 method for determining the resistance of unplasticizedpoly(vinyl chloride) (PVC-U) pipes to dichloromethane at a specified temperature(DCMT).Descriptors Technical International Thesaurus: plastic tubes, unplasticized polyvinyl chloride,determination, chemical resistance, chemical attack, dichlorome

8、thane, testingconditions, temperature, procedure.Modifications The following modifications were made, with respect to the document replaced: dichloromethane surface reduced to a minimum and protected by a larger layerof water (see 6.20); after it is immersed in the dichloromethane, the test specimen

9、 is left to “drain“ inthe layer of water before drying and final inspection (see 7.4).CorrectionsAFNOR le 16/12/2014 03:51 NF EN 580:2003-09PDF created with pdfFactory Pro trial version AFNOR le 16/12/2014 03:51 NF EN 580:2003-09PDF created with pdfFactory Pro trial version EUROPEAN STANDARDNORME EU

10、ROPENNEEUROPISCHE NORMEN 580April 2003ICS 23.040.20 Supersedes EN 580:1993English versionPlastics piping systems - Unplasticized poly(vinyl chloride)(PVC-U) pipes - Test method for the resistance todichloromethane at a specified temperature (DCMT)Systmes de canalisations en plastiques - Tubes enpoly

11、(chlorure de vinyl) non-plastifi - Mthode dessai de larsistance au dichloromthane une temprature spcifie(DCMT)Kunststoff-Rohrleitungssysteme - Rohre ausweichmacherfreiem Polyvinylchlorid (PVC-U) -Prfverfahren fr die Bestndigkeit gegen Dichlormethanbei einer festgelegten Temperatur (DCMT)This Europea

12、n Standard was approved by CEN on 14 February 2003.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 any alteration. Up-to-date lists and bibliographical references conce

13、rning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own langu

14、age and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slova

15、kia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN nationa

16、l Members.Ref. No. EN 580:2003 EAFNOR le 16/12/2014 03:51 NF EN 580:2003-09PDF created with pdfFactory Pro trial version EN 580:2003 (E)2ContentspageForeword3Introduction.41Scope52Principle.53Reagent54Apparatus.55Preparation of the test piece66Immersion conditions.67Procedure.78Expression of results

17、79Test report7Annex A (informative) Description of attack.8Annex B (informative) Example of small vessel build into existing vessel.9AFNOR le 16/12/2014 03:51 NF EN 580:2003-09PDF created with pdfFactory Pro trial version EN 580:2003 (E)3ForewordThis document (EN 580:2003) has been prepared by Techn

18、ical Committee CEN/TC 155 “Plastics piping systemsand ducting systems“, the secretariat of which is held by NEN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by October 2003, and conflicting nationa

19、l standards shall be withdrawn at the latestby October 2003.This document supersedes EN 580:1993.The modifications in principle are: the surface of the dichloromethane is minimised and protected by an increased thick layer of water on top of it(see 6.2); after immersion in the dichloromethane, the t

20、est piece is left for “dripping off” in the water layer before finaldrying and inspection (see 7.4).The modifications permit to reduce annual consumption of dichloromethane and thus improve the environment forthe staff conducting the test without reducing the number of tests. Practice has shown that

21、 this modified procedureand test arrangement can result in a reduction of dichloromethane consumption by more than 90 %.This standard includes the following: Annex A, which is informative, gives a basis for describing the amount of attack: Annex B, which is informative, shows modifications in test e

22、quipment and procedure in order to make itpossible to reduce the consumption of dichloromethane.The material-dependent test parameters and/or performance requirements are incorporated in the referringstandard(s).According to the CEN/CENELEC Internal Regulations, the national standards organizations

23、of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.AFNOR le

24、 16/12/2014 03:51 NF EN 580:2003-09PDF created with pdfFactory Pro trial version EN 580:2003 (E)4IntroductionThe maximum temperature at which the unplasticized poly(vinyl chloride) (PVC-U) pipe is not attacked bydichloromethane gives an indication of the level and homogeneity of gelation of the pipe

25、. This characteristic isrelated to the mechanical properties and, in particular, the long-term performance of the pipe.AFNOR le 16/12/2014 03:51 NF EN 580:2003-09PDF created with pdfFactory Pro trial version EN 580:2003 (E)51 ScopeThis standard specifies a method for determining the resistance of un

26、plasticized poly(vinyl chloride) (PVC-U) pipesto 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 dichloromethane at which P

27、VC-U shall not be attacked, is specified in the referring standard.2 PrincipleA piece of PVC-U pipe, of specified length, chamfered at one end to an angle dependent on its thickness, isimmersed for (30 1) min in dichloromethane at a specified temperature to verify that the PVC-U is not attacked atth

28、at temperature. The surface area of the dichloromethane is minimized and covered by a thick layer of water ontop for safety reasons and to reduce evaporation. After immersion in the dichloromethane, the test piece is left for“dripping off” in the water layer before final drying and inspection.NOTE 1

29、If the PVC-U has not sufficiently gelled, whitening of the surface will occur and, in the worst case, a precipitate will beobserved.NOTE 2It is assumed that the following test parameters are set by the standard making reference to this standard:a) the control temperature, , for the dichloromethane (

30、see 4.3 and 6.3);b) the minimum wall thickness for which the test shall be applied.3 ReagentDichloromethane, technical grade.NOTEDichloromethane, technical grade, contains small quantities (1 % maximum each) of chloromethane (CH3Cl), oftrichloromethane (CHCl3) and of tetrachloromethane (CCl4). It ha

31、s been noted that even if the level of these impurities were toattain 5 % in total, the results would not be significantly different.WARNING The boiling temperature of dichloromethane is low (40 C). Consequently, it has a high vapourpressure at ambient temperature. Further, it can be toxic to skin a

32、nd eyes. It is, therefore, necessary to takeprecautions 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 admissibleconcentration (M.A.C.) is 100 ml/m3 (ppm). Ventilation of the room o

33、r the area in which the container is placedand where the drying of the test piece takes place is, therefore, essential.4 Apparatus4.1 Chamfering machine (see 5.2)4.2 Glass or stainless steel container, preferably of suitable dimensions to accommodate one or more testpieces (see clause 5), with a gra

34、ting maintained at approximately 10 mm above the bottom of the container, a lid tolimit evaporation of the liquid (see 6.1 and 6.2) and thermostatic control, with stirrer, capable of maintaining thetemperature of the liquid at ( 0,5) C with help of the refrigeration equipment (4.3)NOTE It is recomme

35、nded to use a cylindrical container of a suitable small diameter, e.g. slightly greater than 315 mmdepending on the dimensions most frequently produced (larger pipes can be cut into a number of longitudinal sections to beable to accommodate to the size of the container, see 5.1).AFNOR le 16/12/2014

36、03:51 NF EN 580:2003-09PDF created with pdfFactory Pro trial version EN 580:2003 (E)6Depending on the local conditions this container may be positioned in an existing vessel, previously used for largertests, which can be filled with water (see annex B). The temperature control and stirring can take

37、place in the oldvessel in case the new container is relatively small and made from a heat transferring material like stainless steel.The grating should be made so it can be positioned in 2 levels as follows:a) with the appropriate part of the test piece or sections of test piece immersed in the dich

38、loromethane;b) with the part of the test piece(s) which were immersed in the dichloromethane fully immersed in the water butnot in contact with the dichloromethane.4.3 Refrigeration equipment, capable of cooling the dichloromethane to the temperature as specified in thereferring standard.4.4 Hood fi

39、tted with a fume extraction system, for safety reasons (see warning in clause 3) mounted over thecontainer (4.2).5 Preparation of the test piece5.1 Cut from the pipe to be tested a test piece 160 mm in length, such that the cut ends are perpendicular to theaxis of the pipe. The wall thickness of the

40、 pipe shall be greater than the minimum thickness specified for this testby the referring standard see item b) of note 2 in clause 2.5.2 Chamfer, by cutting without tangible heating (see note), one of the ends of the test piece over its completethickness. The angle of chamfer depends on the thicknes

41、s of the pipe as given in Table 1 see item b) of note 2 inclause 2.NOTE The term “cutting“ is intended to exclude grinding.Table 1Pipe wall thickness ( )mmChamfering angledegrees 8108 162016 305.3 Cool the test piece to ambient temperature.5.4 If the test piece is larger than the diameter of the con

42、tainer, cut the test piece into a number of longitudinalsections. The width of the sawing blade shall be maximum 2,5 mm. The number of sections in which a pipe is cutshall be limited to the lowest possible considering the container size.6 Immersion conditions6.1 Fill the container with dichlorometha

43、ne of known refractive index to a level sufficient to immerse thenecessary portion of the test piece (see 7.2).6.2 Cover the dichloromethane with a layer of water of preferably 250 mm to 300 mm, but not less than 20 mm.6.3 Using the temperature controls, refrigeration equipment and stirrer as approp

44、riate, establish and maintain thetemperature of the dichloromethane in the container at ( 0,5) C see item a) of note 2 in clause 2.6.4 Maintain the level of dichloromethane in the container.6.5 Ensure that the refractive index of the dichloromethane does not vary in service by more than 0,002 fromit

45、s initial value.NOTEIn practice, the refractive index varies by 0,0005 every 3 months when some 700 to 800 tests are carried out permonth. A check on the quality of the bath every 3 months should suffice.AFNOR le 16/12/2014 03:51 NF EN 580:2003-09PDF created with pdfFactory Pro trial version EN 580:

46、2003 (E)77 Procedure7.1 For the duration of the test, avoid touching the test piece with fingers (see warning in clause 3), e.g. by usingtongs and gloves.7.2 Place the test piece in the liquid so that the chamfered zone is completely immersed in the dichloromethane.7.3 Leave the test piece for (30 1

47、) min in the dichloromethane.7.4 After this immersion time, place the grate in position 2), see 4.2, for 10 to 15 min to let the dichloromethane“drip off”. See also annex B.7.5 Remove the test piece from the container and leave it to dry in the air for at least 15 min and until the wateris evaporate

48、d in a well-ventilated area or under a hood equipped with a ventilation system.7.6 Examine the test piece and determine the results in accordance with clause 8.8 Expression of results8.1 If the test piece shows no sign of attack anywhere (other than swelling), express the result as “No attack“.8.2 I

49、f the test piece shows signs of attack anywhere, express the result as “Attacked“ and if required describethe appearance and location of the attack.NOTEFor a possible description of the attack on the chamfer, see annex A.9 Test reportThe test report shall include the following information:a) reference to this s