BS EN 1394-1997 Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes - Determination of the apparent initial circumferential tensile strength《塑料管道系统 玻璃纤维增强.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1394 : 1997 BS 2782

2、 : Part 12 : Methods 1211A, B, C1, C2, D, E and F : 1997 Incorporating Amendment No. 1 The European Standard EN 1394 : 1996 has the status of a British Standard ICS 23.040.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Plastics piping systems Glass-reinforced thermosetting

3、 plastics (GRP) pipes Determination of the apparent initial circumferential tensile strengthBS EN 1394 : 1997 Issue 2, March 1998 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board

4、and comes into effect on 15 June 1997 BSI 1998 The following BSI references relate to the work on this standard: Committee reference PRI/61 Draft for comment 94/340633 DC ISBN 0 580 27091 2 Amendments issued since publication Amd. No. Date Text affected 9905 March 1998 Indicated by a sideline Commit

5、tees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PRI/61, Plastics piping and components, upon which the following bodies were represented: British Gas plc British Plastics Federation British Plumbing Fittings Manufacturers Assoc

6、iation British Valve and Actuator Manufacturers Association Chartered Institution of Water and Environmental Management Department of the Environment (British Board of Agre ment) Department of the Environment (Building Research Establishment) Department of the Environment (Property and Buildings Dir

7、ectorate) Department of Transport Electricity Association Federation of Civil Engineering Contractors Health and Safety Executive Institute of Building Control Institute of Materials Institution of Civil Engineers Institution of Gas Engineers National Association of Plumbing, Heating and Mechanical

8、Services Contractors Pipeline Industries Guild Plastics Land Drainage Manufacturers Association Society of British Gas Industries Society of British Water Industries Water Companies Association Water Services Association of England and Wales The following bodies were also represented in the drafting

9、 of this standard, through subcommittees and panels: Association of Consulting Engineers Engineering Equipment and Materials Users Association Institution of Mechanical Engineers RAPRA Technology Ltd.Issue 1, March 1998 BS EN 1394 : 1997 BSI 1998 a Summary of pages The following table identifies the

10、 current issue of each page. Issue 1 indicates that a page has been introduced for the first time by amendment. Subsequent issue numbers indicate an updated page. Vertical sidelining on replacement pages indicates the most recent changes (amendment, addition, deletion). Page Issue Page Issue Front c

11、over Inside front cover a b i ii EN title page 2 3 4 5 2 2 1 blank original 2 2 original original original original 6 7 8 9 10 11 12 13 14 Inside back cover Back cover 2 original original original original original original original original original originalb blankBS EN 1394 : 1997 BSI 1997 i Conte

12、nts Page Committees responsible Inside front cover National foreword ii Foreword 2 Method 1 Scope 3 2 Definitions 3 3 Principles 3 4 Apparatus 4 5 Test pieces 6 6 Conditioning 11 7 Test temperature 12 8 Procedure 12 9 Calculation 12 10 Test report 14 Figures 1 Typical arrangement for pressure testin

13、g of pipes 5 2 Typical arrangement for the split disc 5 3 Typical arrangement for restrained strip test with a split support 6 4 Test piece for split disc test 7 5 Test piece for strip test 8 6 Typical test arrangement for modified strip test 9 7 Test piece for restrained strip test 10 8 Plate test

14、piece 11 9 Resin application to the plate test piece 11 10 Detail of the neck 13ii BSI 1997 BS EN 1394 : 1997 Issue 2, March 1998 | | | National foreword This British Standard has been prepared by Technical Committee PRI/61 and is the English language version of EN 1394 : 1996 Plastics piping system

15、s Glass-reinforced thermosetting plastics (GRP) pipes Determination of the apparent initial circumferential tensile strength, published by the European Committee for Standardization (CEN). It is incorporated into BS 2782 Methods of testing plastics : Part 12 : Reinforced plastics pipes, fittings and

16、 valves, as Methods 1211A, B, C1, C2, D, E and F : 1997, for association with related test methods for plastics materials and plastics piping components, where: Method 1211A corresponds to method A of EN 1394 (burst test); Method 1211B corresponds to method B of EN 1394 (split-disc test); Method 121

17、1C1 corresponds to method C of EN 1394 using a case 1 test piece (strip test with no helically-wound layers); Method 1211C2 corresponds to method C of EN 1394 using a case 2 test piece (strip test including helically-wound layers); Method 1211D corresponds to method D of EN 1394 (modified strip test

18、); Method 1211E corresponds to method E of EN 1394 (restrained strip); Method 1211F corresponds to method F of EN 1394 (plate test). This standard has been prepared for reference by other standards under preparation by CEN for specification of reinforced plastics piping systems and components. It ha

19、s been implemented to enable experience of the methods to be gained and for use for other fresh applications. It is also for use for the revision or amendment of other national standards as practicable, but it should not be presumed to apply to any existing standard or specification which contains o

20、r makes reference to a different test method until that standard/specification has been amended or revised to make reference to this method and adjust any requirements as appropriate. Warning note. This British Standard, which is identical with EN 1394 : 1996, does not necessarily detail all the pre

21、cautions necessary to meet the requirements of the Health and Safety at Work etc. Act 1974. Attention should be paid to any appropriate safety precautions and the methods should be operated only be trained personnel. Compliance with a British Standard does not of itself confer immunity from legal ob

22、ligations.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 1394 : 1996 E EUROPEAN STANDARD EN 1394 NORME EUROPE ENNE EUROPA ISCHE

23、 NORM September 1996 ICS 23.040.20 Incorporating corrigendum November 1997 Descriptors: Pipelines, plastic tubes, thermosetting resins, reinforced plastics, glass, tests, determination, tensile strength, burst tests, computation English version Plastics piping systems Glass-reinforced thermosetting

24、plastics (GRP) pipes Determination of the apparent initial circumferential tensile strength Syste mes de canalisations en plastiques Tubes en plastiques thermodurcissables renforce s de verre (PRV) De termination de la re sistance en traction circonfe rencielle initiale apparente Kunststoff-Rohrleit

25、ungssysteme Rohre aus glasfaserversta rkten duroplastischen Kunststoffen (GFK) Bestimmung der scheinbaren Anfangs-Zugfestigkeit in Umfangsrichtung This European Standard was approved by CEN on 1996-05-09. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the c

26、onditions 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 Central Secretariat or to any CEN member. This European Standard exists in th

27、ree 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of A

28、ustria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1394 : 1996 BSI 1997 Foreword This European Standard has been prepared by Technical Committee CEN/TC 155, Plastics p

29、iping systems and ducting systems, the Secretariat of which is held by NNI. This standard is based on the draft International Standard ISO/DP 8521.2 Glass-reinforced thermosetting plastics (GRP) pipes and fittings Test method for determination of the initial apparent circumferential tensile strength

30、, prepared by the International Organization for Standardization (ISO). It is a modification of ISO/DP 8521.2 for reasons of possible applicability to other test conditions and alignment with texts of other standards on test methods. The modifications are as follows: test parameters (pressure, time,

31、 temperature) are not specified; requirements are not given; editorial changes have been introduced. The material-dependent test parameters and performance requirements are incorporated in the referring standard. This standard is one of a series of standards on test methods which support System Stan

32、dards for plastics piping systems and ducting systems. 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 March 1997, and conflicting national standards shall be withdrawn at the latest by March 1997

33、. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,

34、Sweden, Switzerland and the United Kingdom.Page 3 EN 1394 : 1996 BSI 1997 1) 1 bar = 10 5 N/m 2 = 0,1 MPa. 1 Scope This standard specifies six test methods for the determination of the apparent initial tensile strength in the circumferential direction per unit length of glass-reinforced thermosettin

35、g plastics (GRP) pipes. The burst test (method A) is suitable for all types and sizes of pipes. It is the preferred method for pipes up to and including DN 600. For pipes larger than DN 600 one of the following methods may be preferred. The split disc test (method B) may not be suitable for pipes wi

36、th helically wound reinforcing layers. The strip test (method C) and the modified strip test (method D) are suitable for pipes with a nominal size of DN 600 and greater, and are applicable where the split disc test is not suitable. The restrained strip test (method E) is suitable for all types of pi

37、pes with a nominal size greater than DN 600. The notched plate test (method F) is primarily intended for use for helically wound pipes of nominal size greater than DN 600 with a winding angle other than approximately 90. This method may be used also for other types of pipe with nominal sizes greater

38、 than DN 600. Results from one method are not necessarily equal to the results derived from any of the alternative methods. However, all methods have equal validity. 2 Definitions For the purposes of this standard, the following definitions apply: 2.1 apparent initial circumferential strength (s cA

39、* , s cB * , s cC * , s cD * , s cE * , s cF * ) Ultimate circumferential tensile force per unit length in the circumferential direction (the upper-case subscripts denote the method of test used). It is expressed in newtons per millimetre of circumference. 2.2 burst pressure (p ult ) The internal pr

40、essure at bursting. It is expressed in bars 1) (or megapascals). 2.3 bursting Failure by rupture of the pipe wall. 2.4 ultimate tensile force (F ult ) The tensile force at failure. It is expressed in newtons. 2.5 width (b) The width of the test piece. It is expressed in millimetres. 2.6 winding angl

41、e (f) The angle between the direction of the reinforcement and the longitudinal axis of the pipe. It is expressed in degrees. 3 Principles NOTE. It is assumed that the following test parameters are set by the standard making reference to this standard: a) for method A the length between end sealing

42、devices (see 5.1); b) for methods B, C, D and E the width of the test piece (see 5.2, 5.3, 5.4 and 5.5); c) for methods C and E the total width of the test piece (see 5.3 and 5.5); d) for method F the dimensions of the plate to be tested (see 5.6); e) the number of test pieces (see 5.7); f) the requ

43、irements for conditioning (see clause 6); g) the test temperature (see clause 7). 3.1 Method A The apparent initial circumferential strength, s cA * ,i s determined by a burst test. Cut lengths of pipe are subjected to an increasing internal pressure which, within a specified time, causes bursting (

44、see 2.3). The test conditions are such that a mainly uniaxial circumferential stress is obtained. 3.2 Method B The apparent initial circumferential strength, s cB * ,i s determined by a split disc test. Rings cut from separate pipes are subjected to an increasing tensile force by means of a split di

45、sc within the ring until rupture occurs, within a specified time. 3.3 Methods C, D and E The apparent initial circumferential strength, s c C * , s c D * ,s cE * , is determined by a strip test. Strips cut from the pipe wall in the circumferential direction are subjected to an increasing tensile for

46、ce until rupture occurs within a specified time. 3.4 Method F The apparent initial circumferential strength, s cF * ,i s determined by a notched plate test. Plates cut from the pipe wall are subjected to an increasing tensile force until rupture occurs within a specified time.Page 4 EN 1394 : 1996 B

47、SI 1997 4 Apparatus 4.1 For method A 4.1.1 Hydrostatic pressurizing system, capable of causing failure of the test piece between 1 min and 3 min after commencing the pressurization. NOTE. For nominal sizes greater than DN 600 the duration of the test may be increased. The pressurizing system shall p

48、revent air entering the test piece during pressurization to failure. 4.1.2 Pressure measuring device, with an accuracy of 2,0 % of the test pressure at failure. NOTE. The pressure measuring device should indicate the pressure to within 1,0 % of its maximum reading. 4.1.3 End sealing devices for the

49、test pieces, such that either a mainly uniaxial state of stress in the circumferential direction will be induced (e.g. type 2 or type 3 of figure 1) or a mainly biaxial state of stress will be induced (e.g. type 1 of figure 1). 4.1.4 Test piece support, to minimize deformation due to the weight of the test piece and its contents. 4.1.5 Flexible membrane, (if used as a barrier system to prevent weeping) which does not reduce the stress in the pipewall by more than 1 %. The flexible membrane may be of a dif