SANS 12107-2003 Plastics piping systems - Injection-moulded thermoplastics fittings valves and ancillary equipment - Determination of the long-term hydrostatic strength of thermoplping.pdf

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1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 83.080.20; 83.140.30 ISBN 0-626-14156-7 SANS 12107:2003 Edition 1 EN 12107:1997 Edition 1 SOUTH AFRICAN NATIONAL STANDARD Plastics piping systems Inj

4、ection-moulded thermoplastics fittings, valves and ancillary equipment Determination of the long-term hydrostatic strength of thermoplastics materials for injection moulding of piping components This national standard is the identical implementation of EN 12107:1997 and is adopted with the permissio

5、n of CEN, rue de Stassart 36, B-1050 Brussels. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2003 SANS 12107:2003 Edition 1 EN 12107:1997 Edition 1

6、 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee STANSA SC 5140.14C, Polypropylene pipes, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. EUROPEAN STANDARD EN 12107NO

7、RME EUROPEENNEEUROPAISCHE NORM August 1997ICS 83.140.30Descriptors: Plastic tubes, fittings, cocks, thermoplastic resins, injection moulding, tests, determination, pressure resistance,hydrostatic pressure, testing conditionsEnglish versionPlastics piping systems - Injection-mouldedthermoplastics fit

8、tings, valves and ancillaryequipment - Determination of the long-termhydrostatic strength of thermoplastics materialsfor injection moulding of piping componentsSystemes de canalisation en plastique -Raccords, robinets et equipements auxiliairesen thermoplastiques moules par injection -Determination

9、de la resistance hydrostatique along terme des matieres thermoplastiquesutilisees pour le moulage par injection descomposants de canalisationKunststoff-RohrleitungssystemeSpritzgegossene thermoplastische Formstucke,Armaturen und Zubehbrteile - Bestimmung desZeitstand-Innendruckverhaltens vonthermopl

10、astischen Uerkstoffen fur dasSpritzgiessen von RohrleitungsteilenThis European Standard was approved by CEN on 1997-06-28. CEN members are bound to comply with the CEN/CENELEC InternalRegulations which stipulate the conditions for giving this European Standard the status of a national standard witho

11、utany alteration.Up-to-date lists and bibliographical references concerning such national standards may be obtained on application tothe Central Secretariat or to any CEN member.The European Standards exist in three official versions (English, French, German). A version in any other languagemade by

12、translation under the responsibility of a CEN member into its own Language and notified to the CentralSecretariat has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany,Greece, Iceland, Ireland

13、, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom.CENEuropean Committee for StandardizationComite Europeen de NormalisationEuropai scries Komi tee fur NormungCentral Secretariat: rue de Stassart,36 B-1050 Brusselse 1997 CEN - All rights of exploitation

14、in any form and by any means reserved worldwide for CEN nationalMembers.Ref. No. EN 12107:1997 EPage 2EN 12107:1997ForewordThis European standard has been prepared by Technical Committee CEN/TC 155 “Plastics pipingsystems and ducting systems“ the secretariat of which is held by NNI.In some System St

15、andards material strength requirements are specified includjng design stressvalues based on a minimum required strength (MRS) in accordance with EN ISO 12162.To determine MRS values the extrapolation method is specified in ISO/TR 9080:1992 and forextruded pipes the test method is described in EN 921

16、.This standard specifies the test method for injection-moulded tubular test pieces as well as forextruded pipe test pieces, both of material compound intended for use for injection moulding.Generally the test method for extruded pipes described in EN 921 is included in this standard or it isreferred

17、 to.The material-dependent parameters and/or performance requirements are incorporated in theSystem Standard(s) concerned.Annex A, which is informative, gives a bibliography.This standard is one of a series of standards on test methods which support System Standards forplastics piping systems and du

18、cting systems.This European Standard shall be given the status of a national standard, either by publication ofan identical text or by endorsement, at the latest by February 1998, and conflicting nationalstandards shall be withdrawn at the latest by February 1998.According to the CEN/CENELEC Interna

19、l Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and t

20、he United Kingdom.PagesEN 12107:19971 ScopeThis standard specifies methods for preparing tubular test pieces for testing thermoplastics materialsused for injection moulding, to evaluate the long-term resistance to constant internal water pressureat constant temperature and to check the hydrostatic s

21、trength of the material.2 Normative referencesThis Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments

22、to or revisions of any of these publicationsapply to this Standard only when incorporated in it by amendment or revision. For undatedreferences the latest edition of the publication referred to applies.EN 921 Plastics piping systems - Thermoplastics pipes - Determination ofresistance to internal pre

23、ssure at constant temperatureISO/TR 9080:1992 Thermoplastics pipes for the transport of fluids - Methods of extrapolation ofhydrostatic stress rupture data to determine the long-term hydrostaticstrength of thermoplastics pipe materials3 PrincipleThis test method is intended to evaluate and to check

24、the long-term resistance of thermoplasticsmaterial compounds for injection moulding. The evaluation comprises a comparison with long-termresistance of the equivalent material compound used for the extruded pipe in the same pipingsystem. For both injection-moulding compounds and extrusion compounds,

25、the long-term hydrostaticresistance is determined according to the extrapolation method given in ISO/TR 9080:1992 and theMRS values are considered valid for the design of all piping components having the same materialtype.This test method is also used for checking individual points of the establishe

26、d regression curves as aminimum material test requirement.Whatever the type of material or method of test piece manufacture, after conditioning, test pieces aresubjected to a specified constant internal hydrostatic pressure for a specified period of time or untilthe test piece fails.Throughout the t

27、est, the test pieces are kept in an environment, at a specified constant temperature,comprising water (water-in-water test), another liquid (water-in-liquid test) or air (water-in-air test).Page 4EN 12107:1997NOTE: It is assumed that the following test parameters are set by the standard making refer

28、ence to thisstandard:a) the type of test piece, i.e. extruded or injection-moulded and its diameter and wall thickness (seeclause 4 and 6.3);b) the type of end caps to be used (see clauses 5 and 9);c) the sampling procedure (see 6.1);d) the number of test pieces (see 6.4);e) the following parameters

29、 as required by EN 921 (see clauses 7, 8 and 9):1) the test temperature;2) the test pressure, p, or the circumferential (hoop) stress, a, to be induced by the testpressure;3) the conditioning period;4) the type of test, i.e. water-in-water/liquid/air;5) the duration of the test under pressure and th

30、e criteria for a failure;6) the requirements, or patterns of requirements, if any, which determine the initiation ofadditional testing.4 Test conditionsFor the evaluation of the MRS of injection-moulded material compounds the following two cases shallbe considered:a) The material compound used for i

31、njection moulding is different from the materialcompound used for extrusionThe MRS-value for the compound, used for injection moulding, shall be evaluated in accordancewith ISO/TR 9080:1992.For a compound used only for injection moulding, the MRS-value shall be evaluated usinginjection-moulded tubul

32、ar test pieces.If the injection-moulding compound can also be processed by extrusion, the MRS value may beevaluated using either injection-moulded or extruded tubular test pieces.If the MRS-value has been determined using extruded pipe test pieces, a comparison test withinjection-moulded tubular tes

33、t pieces shall not be required, unless specified in the referringstandard.If the MRS-value is determined using injection-moulded test pieces with a bond line and a failureoccurs in the bond line area, the result may be disregarded and the test repeated on another testpiece.NOTE: To evaluate the MRS

34、and to compare results, it is important that the extruded and the injection-moulded test pieces have the same characteristics. Therefore, for all these tests, preferably an injection-moulded test piece without a bond (weld) line is used.PageSEN 12107:1997b) The material compound used for injection m

35、oulding is the same as the materialcompound used for extrusionIf the extrapolation procedure in accordance with ISO/TR 9080:1992 has been or is carried outonly with extruded pipe test pieces (e.g. to establish the conformity of the material for use forextruded pipes) and the test has been or is exec

36、uted in accordance with EN 921, the evaluatedMRS shall also be valid for the design of components manufactured by injection moulding.In this case a comparison test with an injection-moulded tubular test piece shall not be required,unless such testing is specified in the referring standard.Otherwise

37、the MRS-value shall be evaluated using injection-moulded test pieces.5 ApparatusThe apparatus, including the end caps, shall conform to EN 921 (see clause 9).6 Test pieces6.1 SamplingThe sampling requirements shall be as specified in the referring standard.6.2 CuttingIf the test piece is extruded, i

38、t shall be cut, if necessary, so that its ends are perpendicular to its axis.6.3 Dimensions6.3.1 Injection-moulded tubular test pieceThe test piece shall have one of the two shapes given in figure 1. It shall be produced in one nominaloutside diameter, dn, between 25 mm and 110 mm inclusive and with

39、 a wall thickness as specified inthe referring standard.The free length, /o, of the tubular test piece, excluding the extremities (see figure 1), shall be Zdn,except for the nominal outside diameter dn of 50 mm, for which a free length of minimum 140 mm isappropriate.Page 6EN 12107:1997J0 = 3NOTE: O

40、nly for dn = 50 mm the free length /0 is minimum 140 mm.Figure 16.3.2 Extruded pipe test pieceAn extruded pipe from which test pieces are to be taken shall be produced in one nominal outsidediameter, dp, between 25 mm and 110 mm inclusive and with a wall thickness as specified in thereferring standa

41、rd.The free length, I0, of the test piece shall be 3dn with a minimum of 250 mm.6.4 NumberThe number of test pieces shall be as specified in the referring standard.NOTE: The number of test pieces depends on the purpose of the test (e.g. type test or audit test).7 Calibration of the apparatus and cal

42、culation of the test pressureCalibration of the apparatus and calculation of the test pressure shall be in accordance with EN 921.8 ConditioningConditioning shall be in accordance with EN 921.Page?EN 12107:19979 ProcedureConduct the procedure in accordance with EN 921.To evaluate the MRS-value in ac

43、cordance with ISO/TR 9080:1992, use end caps type a). To test thematerial strength at a specified requirement, use end caps of either type a) or type b), as specified bythe referring standard.10 Test reportThe test report shall include the following information:a) a reference to this standard and to

44、 the referring standard;b) the complete identification of the sample;c) the type of the material;d) the nominal dimensions of the pipe;e) the measured dimensions of the test pieces;f) the test temperature and its range during the test;g) the stress applied;h) the calculated test pressure and precisi

45、on of its measurement;I) the nature of the environment, i.e. air, water or liquid, and nature of the liquid, if used;j) the free length of the test pieces;k) the number of test pieces tested;I) the time to achieve the test pressure;m) the duration of the test;n) the type(s) of failure, if any;o) obs

46、ervations made during and after the test;p) any factors which may have affected the results, such as any incidents or any operatingdetails not specified in this standard;q) the date of test or dates between which the test was conducted.Page 8EN 12107:1997Annex A (informative)BibliographyEN ISO 12162 Thermoplastics materials for pipes and fittings for pressure applicationsClassification and designation - Overall service (design) coefficient