EN 1394-1996 en Plastics Piping Systems - Glass-Reinforced Thermosetting Plastics (GRP) Pipes - Determination of the Apparent Initial Circumferential Tensile Strength (Incorporatin.pdf

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1、 STD-BSI BS EN 1394-ENGL 1777 Lb24bb7 Ob85171 408 BRITISH STANDARD Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes - Determination of the apparent initial circumferential tensile strength The European Standard EN 1394 : 1996 has the status of a British Standard ICs 23.0

2、40.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGKT LAW BS EN 1394 : 1997 BS 2782 : Part 12 : Methods 1211A, B, C1, C2, D, E and F : 1997 rncorpomting 4mendment No. 1 BS EN 1394 : 1997 Issue 2, March 1998 9905 This British Standard, having been prepared under the direction of th

3、e Sector Board for Materiais and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 June 1997 O BSI 1998 March 1998 Indicated by a sideline Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technica

4、l Committee PRY61, Plastics piping and components, upon which the following bodies were represented British Gas plc British Plastics Federation British Plumbing Fittings Manufacturers Association British Valve and Actuator Manufacem Association Chartered Institution of Water and Environmenkd Managem

5、ent Department of the Environment (British Board of Agrment) Department of the Environment (Building Research Establishment) Department of the Environment (Property and Buildings Directorate) Department of ?k.cuisport Electricity Association Federation of Civil Engineering Contractors Health and Saf

6、ety Executive Institute of Building Control Institute of Materials Institution of Civil Engineers Institution of Gas Engineers National Association of Plumbing, Heating and Mechanical Services Contractors Pipeline Industries Guild Plastics Land Dramage Manufacturers Association Society of British Ga

7、s Industries Society of British Water Indusbries Water Companies Association Water Services Association of England and Wales The foliowing bodies were also represented in the raftjng of this standard, through subcommittees and panels. Association of Consulting Engineers Engineering Equipment and Mat

8、erials Users Association Institution of Mechanical Engineers RAPRA Technology Ltd. Amendments issued since publication I Text affected Amd. No. Date The following BSI references relate to the work on this standard Committee reference PRU61 Draft for comment 94/340633 DC ISBN O 580 27091 2 STD.BS1 BS

9、 EN L39Li-ENGL 1997 m LbZLibbS Ob85173 280 Issue 1, March 1998 BS EN 1394 : 1997 Page Front cover inside front cover b i ii 2 3 4 5 a EN title page Summary of pages The following table identifies the current issue of each page. Issue 1 indicates that a page has been introduced for the rst time by am

10、endment. Subsequent issue numbers indicate an updated page. Vertical sideiining on replacement pages indicates the most recent changes (amendment, adition, deletion). Issue Page 2 6 2 7 1 8 blank 9 Original 10 2 11 2 12 original 13 original 14 original Inside back cover 0righ-d Back cover Issue 2 Or

11、iginal Original original original original Original Original original Original Original * rn * O BSI 1998 Contents Committees responsible Page Inside front cover National foreword ii Foreword 2 Method 1 Scope 2 Definitions 3 Principles 4 4P- 6 Test pieces 6 Conditioning 7 Testtemperature 8 Procedure

12、 9 Calculation 3 3 3 4 6 11 12 12 12 10 Testreport 14 Figures 1 Qpical arrangement for pressure testing of pipes 5 2 3 4 6 pical arrangement for the split disc Qpical arrangement for restrained stsip test with a spiit support Test piece for split disc test Test piece for strip test 6 Qpical test arr

13、angement for modified stsip test 9 7 8 Plate test piece Test piece for restrained strip test 10 11 9 Resin application to the plate test piece 11 10 Detail of the neck 13 O BSI 1997 1 STD-BSI BS EN 1394-ENGL 1997 lb24bb9 b5175 053 BS EN 1394 : 1997 hue 2, March 1998 National foreword This British St

14、andard has been prepared by Technical Committee PRY61 and is the English language version of EN 1394 : 1996 Plastics piping systems - Glass-reinforced th.ernwsetting plastics (GRP) pipes - Determinuth of the apparent initid circumfwentk tensile strength, published by the European Committee for Stand

15、ardization (CEN). It is incorporated into BS 2782 Methods of testing plastics : Part 12 : Reinfmed plastics pipes, fittings and valves, as Methods 12114 B, C1, C2, D, E and F : 1997, for association with related test methods for plastics materials and plastics piping components, where: - Method 1211

16、A corresponds to method A of EN 1394 (burst test); - Method 1211B corresponds to method B of EN 1394 (splitdisc test); -Method 1211C1 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 c

17、ase 2 test piece (strip test including helically-wound layers); - Method 1211D corresponds to method D of EN 1394 (modified strip test); - Method 1211E corresponds to method E of EN 1394 (restsained ship); - Method 1211F corresponds to method F of EN 1394 (plate test). This standard has been prepare

18、d for reference by other standards under preparation by CEN for specification of reinforced plastics piping systems and components. It has 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 o

19、ther national standards as practicable, but it should not be presumed to apply to any existing standard or specification which contains or makes reference to a different test method untii that standardkpecification has been amended or revised to make reference to this method and adjust any requireme

20、nts as appropriate. Warnimg note. This British Standard, which is identical with EN 1394 : 1996, does not necessarily detail all the precautions necessary to meet the requirements of the Heaith and Safety at Work etc. Act 1974. Attention should be paid to any appropriate safe precautions and the met

21、hods should be operated only be tsained personnel Compliance with a British Standard does not of itself confer immunity from legal obligations. ii O BSI 1998 - - STD-BSI BS EN 2374-ENGL 1777 2b24bb ObA527b TT H EUROPEAN SIANDARD EN 1394 NORMEC EUROPENNE EXJROP - requirements are not given; - editori

22、al changes have been introduced. The material-dependent test parameters and performance requirements are incorporated in the refening standard. This standard is one of a series of standards on test methods which support System Standards for plastics piping systems and ducting systems. This European

23、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. According to the CENKENELEC Internal Regulations, the national stan

24、dards organizations of the following countries are bound to implement this European standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwas Porhigal, Spain, Sweden, Switzerland and the United Kingdom. O BSI 1997 * v, * STD-BSI B

25、S EN 137LI-ENGL 1797 LbZIbb7 Ob85178 8b2 M Page 3 EN 1394 : 1996 1 Scope This standard specifies six test methods for the determjnation of the apparent initial tensile strength in the circumferential direction per unit length of glassreinforced thermosetting plastics (GRP) pipes. 2.6 winding angle (

26、p) The angle between the direction of the reinforcement and the longitudllial axis of the pipe. It is expressed in degrees. The burst test (method A) is suitable for ail 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

27、 following methods may be preferred. The split disc test (method B) may not be suitable for pipes with helicaily 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 s

28、plit disc test is not suitable. The restmhed strip test (method E) is suitable for all types of pipes 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

29、 approximately 90“. This method may be used also for other types of pipe with nominal sizes greater 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 equai validiw. 2 Definitions For the purposes of th

30、is standard, the following definitions apply 2.1 apparent initial circumferential strength 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

31、.2 burst pressure oldt) The internal pressure at bursting. It is expressed in bass1) (or megapascals). 2.3 bursting Failure by rupture of the pipe wail. 2.4 ultimate tensile force (Fuit) The tensile force at failure. It is expressed in newtons. 2.6 width (b) The width of the test piece. It is expres

32、sed in miimetres. (OCA*, CcB*, ccC*, CcD*, CcE*, CcF*) 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 devices (see 6.1); b) for methods B, C, D and E the width of the test p

33、iece (see 6.2,6.3, 6.4 and 6.6); c) for methods C and E the total width of the test piece (see 6.3 and 6.6); d) for method F the dimensions of the plate to be tested (see 6.6); e) the number of test pieces (see 6.7); f) the requirements for conditioning (see clause 6); g) the test temperature (see c

34、lause 7). 3.1 Method A The apparent initial circumferential strength, ad*, is determined by a burst test. Cut lengths of pipe are subjected to an increasing internai pressure which, with a specified time, causes bursting (see 2.3). The test conditions are such that a mainly unid circumferential stre

35、ss is obtained 3.2 Method B The apparent initid circumferential strength, oCB*, is determined by a split disc test. Rw cut from separate pipes are subjected to an increasing tensile force by means of a split diSc within the ring until rupture occurs, withii a specified time. 3.3 Methods C, D and E T

36、he apparent initiai circumferential strength, ccc*, O,D*,OE*, is determined by a strip test. Strips cut from the pipe wail in the circumferential direction are subjected to an increasing tensile force until rupture occm within a specified time. 3.4 Method F The apparent initial Circumferential stren

37、gth, e,-F*, is determined by a notched plate test. Plates cut from the pipe wall are subjected to an increasing tensile force until rupture occurs with a specified time. 1 bar = lo5 N/m2 = 0,l MPa. O BSI 1997 Page 4 EN 13% : 1996 STD-BSI BS EN 139Li-ENGL 1997 Lb24bb7 b85179 7T9 4 Apparatus 4.1 For m

38、ethod A 4.1.1 Hydrostatic psurizing 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 prevent air entering the test pie

39、ce during pressurization to failure. 4.1.2 Pressure measuring device, with an accuracy of I 2,0 % of the test pressure at failure. NOTE. The pressure measuring device should indicate the pressure to within * i, % of its maximum reading. 4.1.3 End sealing devices for the test pieces, such that either

40、 a mainly miaxial state of slress 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

41、. 4.1.6 Flexible memtm;cne, (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 different material from the pipe, e.g. elastomeric or thermoplastic sheet or a flexible coating. 4.2 For method B 4.2.1 Tes

42、ting machine, of the type capable of producing a progressive separation of the split disc, incorporating the following components a) a fixed or virtuaUy fixed part; b) a moveable part; c) a drive mechanism capable of imparting a constant speed to the moving part so that rupture can be reached betwee

43、n 1 min and 3 min after initial loading; d) a load indicator capable of measuring the force applied This shall be virhially free from inertia at the specified rate of testing and shall indicate the force to an accuracy of within 1 % of the measured due. 4.2.2 Rigid split discs, as shown in figure 2,

44、 capable of mahg even contact with the internal diasrieter of the test piece. The diameter of the two segments of the split disc shall be not less than 98 % of the internal diameter of the pipe with which they are intended to be used. 4.2.3 Dimension measurement devices, capable of measuring the nec

45、essary dimensions of the test piece (e.g. length, wall thickness) to an accuracy of haif the accwacy required in clause 8 for measurements, e.g. measuring accuracy f 0,l mm requires a device accuracy of f 0,05 nun. 4.3 For method C 4.3.1 Testing machine, of the type with constant separating speed, i

46、ncorporating the foilowing components: a) a fixed, or virtually fixed, part with a grip to hold one end of a test piece; b) a moveable part, incorporating a second grip to hold the other end of the test piece. The grips holding the ends of the test piece shall do so as far as possible without slippi

47、ng and/or crushing. Grips which tighten automatically may be used. The fixed and moving parts and their associated grips shall enable the test piece to be aiigned when a force is applied so that the axis of the test piece is coincident with that of the force; c) a drive mechanism capable of impartin

48、g a constant speed to the moving part, so that failure can be reached between 1 min and 3 min after initial d) a load indicator capable of measuring the force applied. The mechanism shall be virtually fk?e from inertia lag at the specified rate of testing and shall show the force with an accuracy of

49、 within 1 % of the measured value. low; 4.3.2 DiwM measuring euice(s), for measuring the width, b, and the free length, 1, of the test piece (see figure 5) to an accuracy of f 0, i mm. 4.4 For method D 4.4.1 Testing whine, conforming to 4.3.1. 4.4.2 Dimensional measuring devices), capable of measuring the width, b, and the thickness, e, of the test piece (see figure 6) to an accuracy of f O, 1 mm. 4.6 For method E 4.6.1 Testing machine, conforming to 4.3.1. 4.6.2 D.imensional measuring devices), capable of measuring