1、BRITISH STANDARDBS EN 681-4:2000Incorporating Amendments Nos. 1 and 2Elastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Part 4: Cast polyurethane sealing elementsThe European Standard EN 681-4:2000, with the incorporation of amendments A1:2002 and A
2、2:2005, has the status of a British StandardICS 23.040.80g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 681-4:2000This British Standard was p
3、ublished under the authority of the Standards Policy and Strategy Committee on 15 September 2000 BSI 7 March 2006ISBN 0 580 36220 5National forewordThis British Standard is the official English language version of EN 681-4:2000, including amendments A1:2002 and A2:2005.The start and finish of text i
4、ntroduced or altered by CEN amendment is indicated in the text by tags . Tags indicating 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, Elas
5、tomeric seals, which has the responsibility to: A list of organizations represented 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 Catalogu
6、e under the section entitled “International Standards Correspondence Index”, or by 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 corre
7、ct application.Compliance with a British Standard does not of itself confer immunity 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 UK interests informed;
8、 monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover.The BSI copyright date displayed in this document indicates when the document was las
9、t issued.Amendments issued since publicationAmd. No. Date Comments13703 26 August 2002 See national foreword15838 March 2006 See national forewordEN 681-4 July 2000 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM + A1 + A2 March 2002 August 2005 ICS 23.040.80 English version Elastomeric seals Mate
10、rials requirements for pipe joint seals used in water and drainage applications Part 4: Cast polyurethane sealing elements (includes amendments A1:2002 and A2:2005) Garnitures dtanchit en caoutchouc Spcifications des mattriaux pour garnitures dtanchit pour joints de canalisation utiliss dans le doma
11、ine de leau et de lvacuation Partie 4: polyurthane moul (inclut les amendements A1:2002 et A2:2005) Elastomer-Dichtungen Werkstoff-Anforderungen fr Rohrleitungs-Dichtungen fr Anwendungen in der Wasserversorgung und Entwsserung Teil 4: Dichtelemente aus gegossenem Polyurethan (enthlt nderungen A1:200
12、2 und A2:2005) This European Standard was approved by CEN on 3 June 2000. Amendment A1 was approved by CEN on 25 February 2002 and Amendment A2 was approved by CEN on 14 July 2005. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving thi
13、s 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 Central Secretariat or to any CEN member. This European Standard exists in three official versions (E
14、nglish, 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,
15、 Czech 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
16、DE 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 681-4:2000 + A1:2002 + A2:2005 EPage 2 EN 681-4:2000 Contents Page Forewor
17、d 3 1 Scope 5 2 Normative references 5 3 Material requirements 6 4 Requirements 6 5 Test pieces and temperature 9 6 Factory production control 10 7 Factory product control tests 10 8 Marking 11 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Construction
18、Products Directive 12 Page 3 EN 681-4:2000 Foreword This European Standard has been prepared by Technical Committee CEN/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, ei
19、ther 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. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound
20、 to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. A European Standard is will be prepared for microbiological deteri
21、oration 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 45011 and EN 4501
22、2 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 quality and ozone
23、resistance. The emphasis in respect of low temperature testing has moved away from hardness measurement to compression set, which is more discriminating. Part 2 has been prepared by TC 208 in response to requests from CEN/TC 155 for a material specification for thermoplastic elastomer seals for use
24、in conjunction with non-pressure thermoplastic pipe systems. Part 3 has been prepared in response to those sections of the pipeline industry which employ cellular seals of vulcanized rubber. This standard should be used where appropriate with product standards which specify performance standards whi
25、ch specify performance requirements for joints. Seals and pipe joints using polyurethane elastomers should be designed and tested to take into account the different requirements compared with those specified in Part 1 of this standard. Page 4 EN 681-4:2000 Foreword to amendment A1 This document EN 6
26、81-4:2000/A1:2002 has been prepared by Technical Committee CEN/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 endorsemen
27、t, at the latest by September 2002, and conflicting national standards 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 Directi
28、ve(s). For relationship with EU Directive(s), see informative 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, Czec
29、h Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A2 This document (EN 681-4:2000/A2:2005) has been prepared by Technical Committee CEN/TC 208 “Ela
30、stomeric seals for joints in pipework and pipelines”, the secretariat of which is held by BSI. This Amendment to the European Standard EN 681-4:2000 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 con
31、flicting national standards shall be withdrawn at the latest by February 2006. This document amends EN 681-4:2000, 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 Stan
32、dard: Austria, Belgium, Cyprus, Czech 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. Page 5 EN 681-4:2000 1
33、 ScopeThis standard specifies requirements for materials used in factory cast polyurethane sealing elements used in joints for drainage, sewerage and rainwater systems and non-potable water supply for continuous flow up to 45 qC. General requirements for finished joint seals are also given; any addi
34、tional requirements called for by the particular application are specified in the relevant product standards taking into account that the performance of pipe joints is a function of the seal material properties, seal geometry and pipe joint design. This standard is applicable to joint seals for all
35、pipeline materials, including iron, steel, clay, fibre cement, concrete, plastics and glass-reinforced plastics. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate place
36、s in the text 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 referr
37、ed to applies. ISO 37, Rubber, vulcanized or thermoplastic - Determination of tensile stress-train 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,
38、Rubber - Temperatures, humidities and times for conditioning and testing ISO 815, Rubber, vulcanized or thermoplastic - Determination of compression set at ambient, elevated or low temperatures ISO 2859-1, Sampling procedures for inspection by attributes - Part 1: Sampling plans indexed by acceptabl
39、e quality level (AQL) for lot-by-lot inspection ISO 3302-1, Rubber - Tolerances for products - Part 1: Dimensional tolerances ISO 3384:1999, Rubber, vulcanized or thermoplastic - Determination of stress relaxation in compression at ambient and at elevated temperatures ISO 3951, Sampling procedures a
40、nd charts for inspection by variables for percent nonconforming Page 6 EN 681-4:2000 ISO 4661-1, Rubber, vulcanized or thermoplastics - Preparation of samples and test pieces - Part 1: Physical tests ISO 9691:1992, Rubber - Recommendations for the workmanship of pipe joint rings - Description and cl
41、assification of imperfections !Text deleted “ 3 Material requirements Material requirements for pipe joint seals are specified in table 1. They correspond to a hardness range of (67 5) IRHD. 4 Requirements4.1 MaterialsThe materials shall be free of any substances which may have a deleterious effect
42、on the fluid being conveyed or on the life of the sealing element, or on the pipe or fitting. 4.2 Finished seal requirements4.2.1 Dimensional tolerancesTolerances shall be specified from Class E2 of ISO 3302-1 or in relevant product standards. 4.2.2 Imperfections and defectsThe seals shall be free o
43、f defects or irregularities which affect their function. 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
44、 zones not involved in the sealing function as described 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 agree
45、d 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 acceptable limiting val
46、ues of the compressive force should be agreed between the interested parties; they depend upon the seals type or design respectively. 1ISO 7743, Rubber, vulcanized or thermoplastic - Determination of compression stress - strain properties Page 7 EN 681-4:2000 4.2.3 HardnessWhen determined by the mic
47、ro-test method specified in ISO 48, the hardness shall comply with the requirement given in table 1. NOTE: If the dimensions of a seal are appropriate, the normal test method specified in ISO 48 can be used, provided that the micro-test method is used for reference purposes. For the same seal, the d
48、ifference between the minimum and maximum hardness shall not be more than 5 IRHD. Each value shall be within the specified tolerances. 4.2.4 Tensile strength and elongation at breakThe tensile strength and elongation at break shall be determined by the method specified in ISO 37. Dumb-bell shaped te
49、st pieces of types 1, 2, 3 or 4 shall be used. Type 2 is the preferred size. The test report shall state the dumb-bell type whenever type 2 is not used. The tensile strength and the elongation at break shall comply with the requirements given in table 1. 4.2.5 Compression set in air4.2.5.1 GeneralIf the test piece is taken from a seal, then the measurement shall be carried out as far as possible in the direction of compression of the seal in service. 4.2.5.2 Compression set at 23 qC and 70 qCWhen determined by the meth
