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BRITISH STANDARD Plastics piping systems Ð Glass-reinforced thermosetting plastics (GRP) pipes Ð Test method to prove the resistance to initial ring definition 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 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BS EN 1226 : 1996 BS 2782 : Part 12 : Method 1214E : 1996 BS EN 1226 : 1996 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee 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 Management Department of the Environment (Building Board of AgreÂment) 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 Materials 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 Companies Association Water Services Association of England and Wales The following bodies were also represented in the drafting of the standard, through subcommittees and panels: 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 and comes into effect on 15 December 1996 BSI 1996 Association of Consulting Engineers Engineering Equipment and Materials Users' Association Institution of Mechanical Engineers RAPRA Technology Ltd Amendments issued since publication Amd No The following BSI references relate to the work on this standard: Committee reference PRI/61 Draft for comment 93/313471 DC ISBN 580 26734 Date Text affected BS EN 1226 : 1996 Contents Committees responsible National foreword Method Foreword Scope Definitions Principle Apparatus Test pieces Conditioning Procedure Test report Figures Schematic diagram of the test arrangement Schematic diagram of load versus time BSI 1996 Page Inside front cover ii 3 3 5 4 i 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 Ð Glass-reinforced thermosetting plastics (GRP) pipes Ð 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 related 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 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 standard/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 precautions 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 obligations ii BSI 1996 EN 1226 EUROPEAN STANDARD NORME EUROPÊENNE EUROPẰISCHE 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 version Plastics piping systems Ð Glass-reinforced thermosetting plastics (GRP) pipes Ð Test method to prove the resistance to initial ring deflection SysteÁmes de canalisations en plastique Ð Tubes en plastiques thermodurcissables renforceÂs de verre (PRV) Ð MeÂthode d'essai pour eÂtablir la reÂsistance aÁ la deÂflexion annulaire initiale Kunststoff-Rohrleitungssysteme Ð Rohre aus glasfaserverstaÈrkten duroplastischen È berpruÈfung Kunststoffen (GFK) Ð Verfahren zur U der Anfangs-Ringverformbarkeit This European Standard was approved by CEN on 1996-01-04 CEN members are bound to comply with the CEN/CENELEC Internal 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 member 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 members 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 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ CEN European Committee for Standardization Comite EuropeÂen de Normalisation EuropaÈisches Komitee fuÈr 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 members Ref No EN 1226 : 1996 E Page EN 1226 : 1996 Foreword This European Standard has been prepared by Technical 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 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 Ð Test method for resistance to initial ring deflection of pipes prepared by the International 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 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 plastics 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, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ BSI 1996 Page EN 1226 : 1996 Scope Principle 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 damage and/or structural failure A piece of pipe supported horizontally 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 2.4) 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 relative vertical deflection (y/dm) The ratio of the vertical deflection, y, (see 2.1) to the mean diameter of the pipe, dm, (see 2.3) 2.3 mean diameter (dm) The diameter of the circle corresponding with the middle of the pipe wall cross section It is given, in metres, by either of the following equations: dm = di + e dm = de e where: 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 (see 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) Apparatus 4.1 Compressive loading machine, comprising a system capable of applying a controlled rate of compression or a dead weight 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 can be compressed vertically The machine shall be able to achieve and sustain in accordance with the periods specified in 7.3 the deflections or relative vertical deflections specified in the referring standard ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ di is the average of the measured internal diameters (see 5.3.2), in metres; de 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 structural 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 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 their major axes perpendicular to and centred on the direction of application of load F by the compressive loading machine, as shown in figure 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 the 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 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 come into contact with the test piece during the test BSI 1996 Page EN 1226 : 1996 Figure Schematic diagram of the test arrangement ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Figure Schematic diagram of load versus time BSI 1996 Page EN 1226 : 1996 4.3 Dimensional measuring devices, capable of determining: ± the necessary dimensions (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 4.4 Temperature measuring device, if applicable, capable of verifying conformity to the test temperature (see 7.1) 7.2 Choice of load application surfaces and positioning 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 and/or beam bars are not tilted laterally Test pieces 7.3 Application of load and measurement of deflection NOTE The maximum value of the change to be measured depends upon the vertical deflection or the relative vertical deflection specified in the referring standard 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 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 180Ê to each other 5.2 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 measured values 5.3.2 Mean diameter Measure to an accuracy of within ±0,5 mm either of the following a) The internal diamter, di, 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, de, of the test piece at the mid-points of the reference lines, e.g by means of a circumferential wrap steel tape Calculate the mean diameter, dm, of the test piece using the values obtained for wall thickness and either the internal or the external diameter (see 2.3) 7.3.1 Either compress or load the test piece at a constant rate so that the first minimum initial vertical deflection or minimum initial relative vertical deflection specified in the referring standard is reached to an accuracy of ±2,0 % of the specified deflection value in (2 ± 0,5) and record the corresponding load F1 (see figure 2) 7.3.2 Maintain this deflection for (2 ± 0,25) while inspecting the test piece without magnification for surface damage (see items e) and f) of the note to clause 3) Record any observations of surface damage together with the corresponding deflection ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Conditioning Unless otherwise specified by the referring standard, store the test pieces for at least 0,5 h at the test temperature (see 7.1) prior to testing Procedure 7.1 Test temperature Conduct the following procedure at the temperature specified in the referring standard BSI 1996 7.3.3 Increase the deflection using either a constant rate of compression or loading so that the second minimum initial vertical deflection or minimum initial relative vertical deflection is reached to an accuracy of within ± 2,0 % of the specified deflection value in (2 ± 0,5) and record the corresponding load F2 7.3.4 Maintain this deflection for (2 ± 0,25) with continuous monitoring and recording of the load applied (see figure 2) and continuous inspection of the test piece for structural failure (see item f) of the note to clause 3) in accordance with 2.4 unless otherwise specified 7.3.5 If an instantaneous drop in load has not been detected during the inspection period, record that failure has not occurred and unload the test piece If an instantaneous drop in load of not more than 10 % of F2 has been detected during the inspection period, then determine the amount of the drop and increase the load at the end of the inspection period by twice the amount of the drop (maximum 20 % of F2) If the increase of load is achieved, then record that failure has not occurred (irrespective of appearance) and unload the test piece If this increase of load cannot be achieved, then record that failure has occurred and unload the test piece If the instantaneous drop in load is more than 10 % of F2 during the inspection period, then record that failure has occurred and unload the test piece Page EN 1226 : 1996 Test report The test report shall include the following information: a) a reference to this standard and the referring standard; b) the full identification of the pipe tested; c) the dimensions of each test piece; d) the number of test pieces; e) the positions in the pipe from which the test pieces were obtained; f) the equipment details, including whether beam bars and/or plates were used; g) the test temperature; h) for each test piece details of any observed surface damage and the corresponding deflection(s) (see 7.3); i) for each test piece details of any structural failure, together with the relevant deflection(s) and load(s) (see 7.3); j) any factors which may have affected the results, such as any incidents or any operating details not specified in this standard; k) the date of test ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ BSI 1996 blank BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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