1、BRITISH STANDARDBS EN 681-2:2000Incorporating Amendments Nos. 1 and 2 and Corrigendum No. 1Elastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Part 2: Thermoplastic elastomersThe European Standard EN 681-2:2000, with the incorporation of amendments A
2、1:2002 and A2:2005, has the status of a British StandardICS 23.040.80g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 681-2:2000This British St
3、andard, having been prepared under the direction of the Materials and Chemicals Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 15 September 2000 BSI 11 January 2006ISBN 0 580 36222 1National forewordThis British Standard is t
4、he official English language version of EN 681-2:2000, including amendments A1:2002 and A2:2005. Together with BS EN 682:2002, this publication supersedes BS 2494:1990 which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags indicat
5、ing changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.The UK participation in its preparation was entrusted to Technical Committee PRI/70, Elastomeric seals, which has the responsibility to: A list of organizations represented
6、 on this committee can be obtained on request to its secretary.Cross-referencesThe 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
7、using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for their correct application.Compliance with a British Standard does not of itself confer immunit
8、y from legal obligations. aid enquirers to understand 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
9、 the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover.The BSI copyright date displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date
10、 Comments13837 Corrigendum No. 128 March 2002 Addition of supersession details to national foreword13705 26 August 2002 See national foreword15840 11 January 2006 See national forewordEN 681-2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM July 2000 + A1 +A2 March 2002 August 2005 ICS 23.040.50 E
11、nglish version Elastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Part 2: Thermoplastic elastomers (includes amendments A1:2002 and A2:2005) Garnitures dtanchit en caoutchouc Spcification des matriaux pour garnitures dtanchit utilises dans le domain
12、e de leau et du drainage Partie 2: Elastomres thermoplastiques (inclut les amendements A1:2002 et A2:2005) Elastomer-Dichtungen Werkstoff-Anforderungen fr Rohrleitungs-Dichtungen fr Anwendengen in der Wasserversorgung und Entwsserung Teil 2: Thermoplastische Elastomere (enthlt nderungen A1:2002 und
13、A2:2005) 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 (Eng
14、lish, 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, Cyprus, C
15、zech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE
16、 NORMALISATIONEUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 681-2:2000 + A1:2002 + A2:2005 EThis European Standard was approved by CEN o
17、n 3 June 2000. Amendment A1 was approved by CEN on 25 February 2002, Amendment CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European A2 was approved by CEN on 14 July 2005. Page 2 EN 681-2:2000 Contents Page Foreword 3 1 Sco
18、pe 5 2 Normative references 5 3 Definitions 6 4 Classification 5 5 Finished seal requirements 6 6 Test pieces and temperature 11 7 Factory production control 12 8 Factory product control tests 12 9 Storage 14 10 Designation 15 11 Marking and labelling 15 Annex A (informative) Guidance on storage of
19、seals . 16 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directive 17 Page 3 EN 681-2:2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 208, Elastomeric seals for joints in pipework and pipelines,
20、 the Secretariat of which is held by BSI. 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 2001, and conflicting national standards shall be withdrawn at the latest by January 2001. Accordi
21、ng to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
22、Spain, Sweden, Switzerland and the United Kingdom. This part has been prepared in response to requests from CEN/TC 155 for a material specification for thermoplastic elastomer seals for use in conjunction with non-pressure thermoplastic pipe systems. A European Standard will be prepared for microbio
23、logical deterioration requirements and when published it is intended that materials comply with the requirements of that standard. It is recommended that third party inspection be carried out at least twice a year without previous notice, the assessment body complying with the requirements of EN 450
24、11 and EN 45012 or equivalent. Part 1 of this standard is based on ISO 4633 and ISO 9631, bringing these two sets of requirements (for cold and hot water respectively) under one specification. The major changes from ISO 4633 and ISO 9631 have been to incorporate requirements for effect on water qual
25、ity and ozone resistance. The emphasis in respect of low temperature testing has moved away from hardness measurement to compression set, which is more discriminating. Part 3 has been prepared in response to requests from those sections of the pipeline industry which employ cellular seals of vulcani
26、zed rubber. Part 4 has been prepared in response to requests from those sections of the pipeline industry which employ cast polyurethane seals. This standard should be used where appropriate with product standards which specify performance requirements for joints. Seals and pipe joints using thermop
27、lastic elastomers should be designed and tested to take into account the different requirements compared with those specified in Part 1 of this standard. In accordance with the common CEN/CENELEC Rules member states are required to transpose the European Standard into a national standard no later th
28、an six months following its date of adoption (DOA) by the BT. At this time any existing national standards having the same scope are withdrawn (DOW). Annex A is informative. Page 4 EN 681-2:2000 Foreword to amendment A1 This document EN 681-2:2000/A1:2002 has been prepared by Technical Committee CEN
29、/TC 208, Elastomeric seals for joints in pipework and pipelines, the Secretariat of which is held by BSI. 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 September 2002, and conflicting national s
30、tandards shall be withdrawn at the latest by December 2003. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative
31、Annex ZA, which is an integral part of this document. 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 Republic, Denmark, Finland, France, Germany, Greece, Iceland
32、, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A2 This document (EN 681-2:2000/A2:2005) has been prepared by Technical Committee CEN/TC 208 “Elastomeric seals for joints in pipework and pipelines”, the secr
33、etariat of which is held by BSI. This Amendment to the European Standard EN 681-2:2000 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2006, and conflicting national standards shall be withdrawn at the latest b
34、y February 2006. This document amends EN 681-2:2000 including amendment A1:2002. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estoni
35、a, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Page 5 EN 681-2:2000 1 ScopeThis standard specifies requirements for materials used f
36、or moulded seals only of thermoplastic elastomers (TPE) used in joints of: 1) thermoplastic piping systems for non pressure waste water discharge (intermittent flow up to 95 C) inside buildings; 2) thermoplastic piping systems for non-pressure underground drainage and sewerage (continuous flow up to
37、 45 C and intermittent flow up to 95 C);3) thermoplastic rainwater piping systems.General requirements for finished joint seals are also given; any additional requirements called for by the particular application are specified in the relevant product standards taking into account that the performanc
38、e of pipe joints is a function of the seal material properties, seal geometry and pipe joint design. 2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text
39、 and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications 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
40、. ISO 37, Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties ISO 48, Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 and 100 IRHD) ISO 188, Rubber, vulcanized - Accelerated ageing or heat-resistance tests ISO 471, Rubber - Tem
41、peratures, humidities and times for conditioning and testing ISO 815, Rubber, vulcanized or thermoplastic - Determination of compression set at ambient, elevated or low temperatures ISO 1431-1, Rubber, vulcanized or thermoplastic - Resistance to ozone cracking - Part 1: Static strain test ISO 1817,
42、Rubber, vulcanized - Determination of the effect of liquids ISO 2859-1, Sampling procedures for inspection by attributes - Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection ISO 3302-1, Rubber - Tolerances for products - Part 1: Dimensional tolerances ISO 3384
43、:1999, Rubber, vulcanized or thermoplastic - Determination of stress relaxation in compression at ambient and at elevated temperatures Page 6 EN 681-2:2000 ISO 3951, Sampling procedures and charts for inspection by variables for percent nonconforming ISO 4661-1, Rubber, vulcanized or thermoplastic -
44、 Preparation of samples and test pieces - Part 1: Physical tests ISO 9691:1992, Rubber - Recommendations for the workmanship of pipe joint rings - Description and classification of imperfections #Text deleted$ 3 DefinitionsFor the purposes of this standard the following definition applies. Thermopla
45、stic elastomer a polymer or blend of polymers that does not require vulcanization or crosslinking during processing, yet has elastic properties, at its service temperature. These properties disappear at processing temperature, so that further processing is possible, but return when the material is r
46、eturned to its service temperature. 4 ClassificationA nominal hardness of materials shall be specified within the ranges in table 1. !Table 1 - Hardness categories Hardness category 50 60 70 Range of hardness, IRHD 46 / 55 56 / 65 66 / 75 “ The three classes of hardness for materials for pipe joints
47、 seals are specified in table 2. 5 Finished seal requirements5.1 Dimensional tolerances. Tolerances shall be specified from the appropriate classes in ISO 3302-1. Page 7 EN 681-2:2000 5.2 Imperfections and defects The seals shall be free of defects or irregularities which could affect their function
48、. Classification of imperfections shall be according to ISO 9691:1992 as follows: - surface imperfections in zones involved in the sealing function as described in 4.1.1 of ISO 9691:1992 shall be considered as defects. - surface imperfections in zones not involved in the sealing function as describe
49、d in 4.1.2.1b) of ISO 9691:1992 shall not be considered as defects. NOTE 1: Major surface imperfections in zones not involved in the sealing function as described in 4.1.2.1a) of ISO 9691:1992 could be considered as defects. This should be agreed between the interested parties; the acceptance criteria depend upon the seals type or design respectively. NOTE 2: Internal imperfections as described in 4.2 of ISO 9691:1992 could be considered as defects. The compressive force can be determined according to ISO 77431). The accep
