1、BRITISH STANDARD BS EN 12814-8:2001 Incorporating Corrigendum No. 1 Testing of welded joints of thermoplastics semi-finished products Part 8: Requirements The European Standard EN 12814-8:2001 has the status of a British Standard ICS 25.160.40 BS EN 12814-8:2001 This British Standard, having been pr
2、epared under the direction of the Sector Policy and Strategy Committee for Materials and Chemicals, was published under the authority of the Standards Policy and Strategy Committee on 15 November 2001 BSI 28 November 2003 ISBN 0 580 38694 5 National foreword This British Standard is the official Eng
3、lish language version of EN 12814-8:2001, including Corrigendum September 2003. The UK participation in its preparation was entrusted to Technical Committee PRI/80, Welding of plastics, which has the responsibility to: A list of organizations represented on this committee can be obtained on request
4、to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Elect
5、ronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to u
6、nderstand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comp
7、rises a front cover, an inside front cover, the EN title page, pages 2 to 19 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14808 Corrigendum No. 1 28 November 2003 Correcti
8、ons to clauses 6.1.1 and 6.1.2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12814-8 September 2001 ICS 25.160.40 Incorporating Corrigendum September 2003 English version Testing of welded joints of thermoplastics semi-finished products - Part 8: Requirements Essai des assemblages souds sur p
9、roduits semi-finis en thermoplastiques - Partie 8: Exigences Prfen von Schweiverbindungen aus thermoplastischen Kunststoffen - Teil 8: Anforderungen This European Standard was approved by CEN on 11 August 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate
10、 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 standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists i
11、n 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 the Management Centre has the same status as the official versions. CEN members are the national standards bodies of
12、 Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Manage
13、ment Centre: rue de Stassart, 36 B-1050 Brussels 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12814-8:2001 E ORUEDRADNATSNAEP ENNEPORUEEMRON MRONEHCSIPORUE A/1002:841821NEC 3002rebmetpeS 3002erbmetpeS 3002rebmetpeS SCI nois
14、revhsilgnE esianarFnoisreV gnussaFehcstueD :8traPstcudorpdehsinifimesscitsalpomrehtfostniojdedlewfognitseT stnemeriuqeR russduossegalbmessasedsiassE seuqitsalpomrehtnesinifimesstiudorp secnegixE:8eitraP suanegnudnibreviewhcSnovnefrP :8lieTneffotstsnuKnehcsitsalpomreht negnuredrofnA laiciffoeerhtehtn
15、inoitaroprocnirof3002rebmetpeS71noevitceffesemocebmudnegirrocsihT .NEehtfosnoisrevegaugnal snoisrevsiortselsnadnoitaroprocniruop3002erbmetpes71elteffeardnerpmudnegirroceC .NEaledselleiciffoseuqitsiugnil negnussafhcarpSnelleiziffoierdeidnignutiebraniEruz3002rebmetpeS.71mattirtgnugithcireBeiD .tfarKni
16、NEred RUEOPECNAOMMIFEETTORSTRADNAIDITAZNO COMIRUETOPEDNERONMALISAITNO RUEOPISCHSEMOKIFEETRRONMGNU slessurB0501B63,trassatSedeur:ertneCtnemeganaM NEC3002 .srebmeMlanoitanNECrofediwdlrowdevresersnaemynaybdnamrofynaninoitatiolpxefosthgirllA xuareitneednomelsnadsvresrtioseceuqerinameuqleuqedteemrofeuqle
17、uqsuosnoitatiolpxedstiordsuoT .NECudxuanoitanserbmem nredeilgtiMnelanoitannedtiewtlewdnis,nerhafreVmehclewnidnumroFrehclewnihcielg,gnutrewreVredethceRellA .netlahebrovNECnov F/E/D3002:CA/1002:841821NE:.oN.feREN 12814-8:2001 (E) 2 Contents page Foreword3 Introduction .4 1 Scope5 2 Normative reference
18、s5 3 Symbols and abbreviations 5 4 Materials and properties .6 5 Destructive test methods6 6 Requirements.7 6.1 Bend test.7 6.2 Tensile test.18 6.3 Tensile creep test.18 6.4 Peel tests18 6.5 Macroscopic examination.18 6.6 Low temperature tensile test19 6.7 Tensile test with waisted test specimen .19
19、 EN 12814-8:2001 (E) 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 249 “Plastics“, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at th
20、e latest by March 2002, and conflicting national standards shall be withdrawn at the latest by March 2002. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republi
21、c, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. EN 12814-8:2001 (E) 4 Introduction This document is not complete but contains all available information known at the time of writing. E
22、N 12814-8:2001 (E) 5 1 Scope This European Standard provides the requirements for the tests made on welded thermoplastics semi-finished products. The selection of the appropriate test method(s) should be made in accordance with the particular type and application of welded product. The test results
23、depend on the conditions of manufacture for the test specimen and on the test conditions. They can therefore only be related to the behaviour of the product or can only be used for designing a structure, if the test conditions can be related to the service conditions. 2 Normative references This Eur
24、opean Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publication
25、s apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 12814-1, Testing of welded joints of thermoplastics semi-finished products Part 1 : Bend test. EN 12814
26、-2, Testing of welded joints of thermoplastics semi-finished products Part 2 : Tensile test. EN 12814-3, Testing of welded joints of thermoplastics semi-finished products Part 3 : Tensile creep test. EN 12814-4, Testing of welded joints of thermoplastics semi-finished products Part 4 : Peel test. EN
27、 12814-5, Testing of welded joints of thermoplastics semi-finished products Part 5 : Macroscopic examination. EN 12814-6, Testing of welded joints of thermoplastics semi-finished products Part 6 : Low temperature tensile test. prEN 12814-7, Testing of welded joints of thermoplastics semi-finished pr
28、oducts Part 7 : Tensile test with waisted test specimens. 3 Symbols and abbreviations HT Heated tool welding HG Hot gas welding EX Extrusion welding (continuous) EN 12814-8:2001 (E) 6 4 Materials and properties This standard is applicable to the thermoplastic materials listed in Table 1. Table 1 Mat
29、erials and symbols Symbol Material PE Polyethylene PP aPolypropylene PP-B Polypropylene block copolymer PP-H Polypropylene homopolymer PP-R Polypropylene random copolymer PVC-C Polyvinyl chloride chlorinated PVC-U bPolyvinyl chloride unplasticised PVC-NI Polyvinyl chloride normal impact PVC-RI Polyv
30、inyl chloride raised impact PVDF Polyvinylidene fluoride aPP includes PP-B, PP-H and PP-R.bPVC-U includes PVC-NI and PVC-RI.5 Destructive test methods The dimensions and the methods for sampling and preparing test specimens, together with the conditions for carrying out destructive tests are given i
31、n the standards shown in Table 2. Table 2 Destructive test methods for welded joints Test method Standard Bend test EN 12814-1 Tensile test EN 12814-2 Tensile creep test EN 12814-3 Peel test EN 12814-4 Macroscopic examination EN 12814-5 Low temperature tensile test EN 12814-6 Tensile test with waist
32、ed test specimen prEN 12814-7 EN 12814-8:2001 (E) 7 6 Requirements The semi-finished products used for the welded joints shall comply with the relevant standards. The welded joints shall meet the requirements specified hereafter. 6.1 Bend test 6.1.1 Bend angle The individual measure value of the ben
33、d angle shall be greater than or equal to the values given in Figures 1 to 6. If the criterion for failure used is that a maximum load is reached then bend angles below the minimum valves given in Figures 1 to 6 shall be considered acceptable providing that they are not less than the bend angle achi
34、eved by specimens cut from the parent sheet. For PVC-C, the requirements shall be agreed between the contracting parties. 6.1.2 Displacement The individual measured values of the ram displacement shall be greater than or equal to the values given in Figures 7 to 10. If the criterion for failure used
35、 is that a maximum load is reached then ram displacement below the minimum valves given in Figures 7 to 10 shall be considered acceptable providing that they are not less than the ram displacement achieved by specimens cut from the parent sheet. For PP-B, PP-H, PVC-C and PVC-RI, the requirements sha
36、ll be agreed between the contracting parties. EN 12814-8:2001 (E) 8 4 3 0 30 60 90 120 150 180 0 6 12 18 24 30 2 1Key 1 Bend angle in 2 Test specimen thickness in mm 3 HT 4 EX, HG Figure 1 Minimum bend angle for PE (density 0,94) EN 12814-8:2001 (E) 9 4 3 0 15 30 45 60 75 90 0 6 12 18 24 30 2 1Key 1
37、 Bend angle in 2 Test specimen thickness in mm 3 HT 4 EX, HG Figure 2 Minimum bend angle for PP-B and PP-H EN 12814-8:2001 (E) 10 3 4 0 30 60 90 120 150 180 0 6 12 18 24 30 2 1Key 1 Bend angle in 2 Test specimen thickness in mm 3 HT 4 EX, HG Figure 3 Minimum bend angle for PP-R EN 12814-8:2001 (E) 1
38、1 4 3 0 15 30 45 60 75 90 0 6 12 18 24 30 2 1Key 1 Bend angle in 2 Test specimen thickness in mm 3 HT 4 HG Figure 4 Minimum bend angle for PVC-NI EN 12814-8:2001 (E) 12 4 3 0 15 30 45 60 75 90 0 6 12 18 24 30 2 1Key 1 Bend angle in 2 Test specimen thickness in mm 3 HT 4 HG Figure 5 Minimum bend angl
39、e for PVC-RI EN 12814-8:2001 (E) 13 3 4 0 15 30 45 60 75 90 0 6 12 18 24 30 2 1Key 1 Bend angle in 2 Test specimen thickness in mm 3 HG 4 HT Figure 6 Minimum bend angle for PVDF EN 12814-8:2001 (E) 14 4 3 0 10 20 30 40 50 60 0 6 12 18 24 30 2 1Key 1 Ram displacement in mm 2 Test specimen thickness i
40、n mm 3 HT 4 EX, HG Figure 7 Minimum ram displacement for PE (density 0,94) EN 12814-8:2001 (E) 15 4 3 0 10 20 30 40 50 60 0 6 12 18 24 30 2 1Key 1 Ram displacement in mm 2 Test specimen thickness in mm 3 HT 4 EX, HG Figure 8 Minimum ram displacement for PP-R EN 12814-8:2001 (E) 16 4 3 0 5 10 15 20 2
41、5 30 0 6 12 18 24 30 2 1Key 1 Ram displacement in mm 2 Test specimen thickness in mm 3 HT 4 HG Figure 9 Minimum ram displacement for PVC-NI EN 12814-8:2001 (E) 17 4 3 0 5 10 15 20 25 30 0 6 12 18 24 30 2 1Key 1 Ram displacement in mm 2 Test specimen thickness in mm 3 HG 4 HT Figure 10 Minimum ram di
42、splacement for PVDF EN 12814-8:2001 (E) 18 6.2 Tensile test The calculated value of the short-term tensile welding factor f sshall be greater than or equal to the values given in Table 3. Table 3 Requirements for the short-term tensile welding factor f sMinimum short-term tensile welding factor f sP
43、rocess PE PP PVC-C PVC-U PVDF Heated tool welding 0,9 0,9 0,8 0,9 0,9 Extrusion welding (continuous) 0,8 0,8 a a a Hot-gas welding 0,8 0,8 0,7 0,8 0,8 aRequirements to be agreed between the contracting parties. 6.3 Tensile creep test The calculated value of the long-term tensile welding factor f lsh
44、all be greater than or equal to the values given in Table 4. Table 4 Requirements for the long term tensile welding factor f lMinimum long term tensile welding factor f lProcess PE PP PVC-C PVC-U PVDF Heated tool welding 0,8 0,8 0,6 0,6 0,6 Extrusion welding (continuous) 0,6 0,6 a a a Hot-gas weldin
45、g 0,4 0,4 0,4 0,4 0,4 aRequirements to be agreed between the contracting parties. 6.4 Peel tests The T-Peel test requirements shall be agreed between the contracting parties. For the decohesion test, rupture in the brittle mode shall not exceed 25 % of the length of the fusion interface for PE. For
46、other materials, the requirements shall be agreed between the contracting parties. For the crush test, the length of fracture in the fusion plane parallel to the pipe axis, L d , shall not be greater than the distance between the first two turns of wire of an electrofusion fitting. For heated tool s
47、ocket welds any resulting fracture shall not occur between the pipe and fitting. 6.5 Macroscopic examination Macroscopic examination requirements are given by the relevant application standards. EN 12814-8:2001 (E) 19 6.6 Low temperature tensile test The calculated value of the low temperature tensi
48、le welding factor f tshall be greater than or equal to the values given in Table 5. Table 5 Requirements for the low temperature tensile welding factor f tMinimum low temperature tensile welding factor f tPE PPaPVC-C PVC-U PVDFab 0,9 b b 0,8 aButt welding by heated tool and infrared. bRequirements to be agreed between the contracting parties.6.7 Tensile test with waisted test specimen For PE, the fracture mode shall be ductile. For other materials, the requirements shall be agreed between the contracting parties. BS EN 12814-8:2001 BSI 389 Chiswick H
