1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1226 : 1996 BS 2782
2、 : Part 12 : Method 1214E : 1996 The European Standard EN 1226 : 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 plastics (GRP) pipes Test method to prove the resista
3、nce to initial ring definitionThis 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 and comes into effect on 15 December 1996 BSI 1996 The following BSI references relate to the work o
4、n this standard: Committee reference PRI/61 Draft for comment 93/313471 DC ISBN 0 580 26734 2 BS EN 1226 : 1996 Amendments issued since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committ
5、ee PRI/61, Plastics piping systems and components, upon which the following bodies were represented: British Gas plc British Plastics Federation British Plumbing Fittings Manufacturers Association British Valve and Actuator Manufacturers Association Chartered Institution of Water and Environmental M
6、anagement Department of the Environment (Building Board of Agre ment) Department of the Environment (Building Research Establishment) Department of Transport Electricity Association Federation of Civil Engineering Contractors Health and Safety Executive Institute of Building Control Institute of Mat
7、erials Institution of Civil Engineers Institution of Gas Engineers National Association of Plumbing, Heating and Mechanical Services Contractors Pipeline Industries Guild Plastics Land Drainage Manufacturers Association Society of British Gas Industries Society of British Water Industries Water Comp
8、anies Association Water Services Association of England and Wales The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Association of Consulting Engineers Engineering Equipment and Materials Users Association Institution of Mechanical Engineer
9、s RAPRA Technology Ltd.BS EN 1226 : 1996 BSI 1996 i Contents Page Committees responsible Inside front cover National foreword ii Method Foreword 2 1 Scope 3 2 Definitions 3 3 Principle 3 4 Apparatus 3 5 Test pieces 5 6 Conditioning 5 7 Procedure 5 8 Test report 6 Figures 1 Schematic diagram of the t
10、est arrangement 4 2 Schematic diagram of load versus time 4ii BSI 1996 BS EN 1226 : 1996 National foreword This British Standard has been prepared by Technical Committee PRI/61 and is the English language version of EN 1226 : 1996 Plastics piping systems Glass-reinforced thermosetting plastics (GRP)
11、 pipes Test method to prove the resistance to initial ring deflection, 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 valves, as Method 1214E : 1996 for association with re
12、lated test methods for plastics materials and plastics piping components. This test method has been prepared 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 method to
13、 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 or makes reference to a different test method until that s
14、tandard/specification has been amended or revised to make reference to this method and adjust any requirements as appropriate. No existing British Standard is superseded by this Method. Warning note. This British Standard, which is identical with EN 1226 : 1996 does not necessarily detail all the pr
15、ecautions 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 method should be operated only by trained personnel. Compliance with a British Standard does not of itself confer immunity from legal ob
16、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 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its m
17、embers. Ref. No. EN 1226 : 1996 E EUROPEAN STANDARD EN 1226 NORME EUROPE ENNE EUROPA ISCHE NORM June 1996 ICS 23.040.20 Descriptors: Pipelines, plastic tubes, reinforced plastics, glass reinforced plastics, thermosetting resins, mechanical tests, measurements, flexing, mechanical strength English ve
18、rsion Plastics piping systems Glass-reinforced thermosetting plastics (GRP) pipes Test method to prove the resistance to initial ring deflection Syste mes de canalisations en plastique Tubes en plastiques thermodurcissables renforce sd e verre (PRV) Me thode dessai pour e tablir la re sistance a l a
19、d e flexion annulaire initiale Kunststoff-Rohrleitungssysteme Rohre aus glasfaserversta rkten duroplastischen Kunststoffen (GFK) Verfahren zur U berpru fung der Anfangs-Ringverformbarkeit This European Standard was approved by CEN on 1996-01-04. CEN members are bound to comply with the CEN/CENELEC I
20、nternal Regulations which stipulate 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 Central Secretariat or to any CEN me
21、mber. This European Standard exists in 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 Central Secretariat has the same status as the official versions. CEN membe
22、rs are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1226 : 1996 BSI 1996 Foreword This European Standard has been prepared by T
23、echnical Committee CEN/TC 155, Plastics piping systems and ducting systems, the secretariat of which is held by NNI. 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 December 1996, and conflicting
24、national standards shall be withdrawn at the latest by December 1996. This standard is based on the Draft International Standard ISO/DIS 10466 Glass reinforced thermosetting plastics (GRP) pipes and fittings Test method for resistance to initial ring deflection of pipes prepared by the International
25、 Organization for Standardization (ISO). It is a modification of ISO/DIS 10466 for reasons of applicability to other test conditions and alignment with texts of other standards on test methods. The modifications are: test parameters (pressure, time, temperature) are not specified; material-dependent
26、 or performance requirements are not given; editorial changes have been introduced. The material-dependent test parameters and/or performance requirements are incorporated in the referring standard. This standard is one of a series of standards on test methods which support System Standards for plas
27、tics piping systems and ducting systems. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Iceland, Italy, Luxembourg, Netherla
28、nds, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom.Page 3 EN 1226 : 1996 BSI 1996 1 Scope This standard specifies a method for testing the ability of glass-reinforced thermosetting plastics (GRP) pipes to withstand specified levels of initial ring deflection without displaying surface
29、 damage and/or structural failure. 2 Definitions For the purposes of this standard, the following definitions apply. 2.1 vertical deflection (y) The vertical change, in diameter, of a pipe in a horizontal position in response to a vertical compressive load (see 7.3). It is expressed in metres. 2.2 r
30、elative vertical deflection (y/d m ) The ratio of the vertical deflection, y, (see 2.1) to the mean diameter of the pipe, d m , (see 2.3). 2.3 mean diameter (d m ) The diameter of the circle corresponding with the middle of the pipe wall cross section. It is given, in metres, by either of the follow
31、ing equations: d m = d i + e d m = d e 2 e where: d i is the average of the measured internal diameters (see 5.3.2), in metres; d e is the average of the measured external diameters (see 5.3.2), in metres; e is the average of the measured wall thickness of the pipe (see 5.3.1), in metres. 2.4 struct
32、ural failure A failure apparent in any of the following forms (see 7.3): interlaminar separation; tensile failure of the glass fibre reinforcement; buckling of the pipe wall; if applicable, separation of the thermoplastic liner from the structural wall. 3 Principle A piece of pipe supported horizont
33、ally is loaded throughout its length to compress it diametrically to two successive specified levels of vertical deflection (see figure 2). The pipe is inspected at the first deflection level for surface damage and/or structural failure and at the second deflection level for structural failure (see
34、2.4). NOTE. It is assumed that the following test parameters are set by the standard making reference to this standard: a) the two deflection limits of the pipe (see 4.1 and 7.3); b) the length of the test pieces (see clause 5); c) the number of test pieces (see clause 5); d) the test temperature (s
35、ee 7.1); e) the surface(s) of the test piece to be inspected for surface damage (see 7.3); f) the characteristics of surface damage and structural failure (see 7.3). 4 Apparatus 4.1 Compressive loading machine, comprising a system capable of applying a controlled rate of compression or a dead weight
36、 loading system, without shock, through two parallel load application surfaces conforming to 4.2 so that a horizontally orientated test piece of pipe conforming to clause 5 can be compressed vertically. The machine shall be able to achieve and sustain in accordance with the periods specified in 7.3
37、the deflections or relative vertical deflections specified in the referring standard. 4.2 Load application surfaces 4.2.1 General arrangement The surfaces shall be provided by a pair of plates (see 4.2.2), or a pair of beam bars (see 4.2.3), or a combination of one such plate and one such bar, with
38、their major axes perpendicular to and centred on the direction of application of load F by the compressive loading machine, as shown in figure 1. The surfaces to be in contact with the test piece shall be flat, smooth, clean and parallel. Plates and beam bars shall have a length at least equal to th
39、e test piece (see clause 5) and have a thickness such that visible deformation does not occur during the test. 4.2.2 Plates The plate(s) shall have a width of at least 100 mm. 4.2.3 Beam bars Each beam bar shall have rounded edges, a flat face (see figure 1) without sharp edges and a width dependent
40、 upon the pipe as follows: a) for pipes with a nominal size not greater than DN 300 the width shall be (20 2) mm; b) for pipes of nominal sizes greater than DN 300 the width shall be (50 5) mm. The beam bars shall be so constructed and supported that no other surface of the beam bar structure shall
41、come into contact with the test piece during the test.Page 4 EN 1226 : 1996 BSI 1996 Figure 1. Schematic diagram of the test arrangement Figure 2. Schematic diagram of load versus timePage 5 EN 1226 : 1996 BSI 1996 4.3 Dimensional measuring devices, capable of determining: the necessary dimensions (
42、length, diameter, wall thickness) to an accuracy of within 0,1 mm; the deflection of the test piece in the vertical direction to an accuracy of within 1,0 % of the maximum value. NOTE. The maximum value of the change to be measured depends upon the vertical deflection or the relative vertical deflec
43、tion specified in the referring standard. 4.4 Temperature measuring device, if applicable, capable of verifying conformity to the test temperature (see 7.1). 5 Test pieces 5.1 Preparation The test piece shall be a complete ring cut from the pipe to be tested. The length of the test piece shall be as
44、 specified in the referring standard, with permissible deviations of 5% . The cut ends shall be smooth and perpendicular to the axis of the pipe. Two straight lines, to serve as reference lines, shall be drawn on the inside or the outside along the length of the test piece at 180 to each other. 5.2
45、Number The number of test pieces shall be as specified in the referring standard. 5.3 Determination of the dimensions 5.3.1 Wall thickness Measure to within 0,2 mm the wall thickness of the test piece at each end of each reference line. Calculate the average wall thickness, e, in metres, of the four
46、 measured values. 5.3.2 Mean diameter Measure to an accuracy of within 0,5 mm either of the following. a) The internal diamter, d i , of the test piece between each diametrically opposed pair of reference lines at their mid-length, e.g. by means of a calliper. b) The external diameter, d e , of the
47、test piece at the mid-points of the reference lines, e.g. by means of a circumferential wrap steel tape. Calculate the mean diameter, d m , of the test piece using the values obtained for wall thickness and either the internal or the external diameter (see 2.3). 6 Conditioning Unless otherwise speci
48、fied by the referring standard, store the test pieces for at least 0,5 h at the test temperature (see 7.1) prior to testing. 7 Procedure 7.1 Test temperature Conduct the following procedure at the temperature specified in the referring standard. 7.2 Choice of load application surfaces and positionin
49、g of the test piece If one of the required relative deflection limits (for surface damage or for structural failure) is in excess of 28 %, use beam bars, otherwise use either plates and/or beam bars (see 4.2). Place the test piece in contact with the upper and lower plate or beam bar (see 4.2.1) with the pair of diametrically opposed reference lines vertically aligned. Ensure that the contact between the test piece and each bearing plate or beam bar is as uniform as possible and the plates
