1、 STD-BSI BS EN 122b-ENGL 177b I 1b24bb7 0583534 858 BRITISH STANDARD Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes - Test method to prove the resistance to initial ring deflection The European Standard EN 1226 : 1996 has the status of a British Standard ICs 23.040.20
2、BS EN 1226 : 1996 BS 2782 : Part 12 : Method 1214E : 1996 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN 122b-ENGL 199b m Lb24bb9 0581515 799 m AmdNo. BS EN 1226 : 1996 Date Textafected * Committees responsible for this British Standard The preparation of this B
3、ritish Standard was entrusted to Technical Committee PW61, Plastics pipii systems and components, upon which the following bodies were represented: British Gas pic British Phtics Federation British Plumbing Fittings Manufacturers Association British Vahe and Actuator Manufacturers Association Charte
4、red Instution of Water and Environmental Management Department of the Environment (Building Board of Agrment) Department of the Environment (Building Research Establishment) Department of ibnsport Electricity Association Federation of Civil Engineering Contractors Health and Safety Executive Institu
5、te of Building Conbol Institute of Materials institution of Civil Engineers institution of Gas Engineers Nationai Association of Plumbing, Heating and Mechanid SeMces Contsactors Pipeline Industries Guild Plastics Land Drainage Manatwers Association Society of British Gas Industries Society of Briti
6、sh Water Indushies Water Companies Association Water Services Association of England and Waies The following Wes were also represented in the draftkg of the standard, through subcommittees and panels Associon of Consulting Engineers Engineering Equipment and Materials Users Association Institution o
7、f Mechanical Enheers - This British Standard, having been prepared under the RAPRATechnology Ltd. dire - mahiaidependent or performance requirements are not given; - eitoriai changes have been introduced. The material-dependent test parameters andlor performance requirements are incorporated in the
8、referringstandard. This standard is one of a series of standards on test methods which support System Standards for piastics piping system and duchg systems. According to the CENXENELEC Internal Regulations, the national standards organizations of the following countries are bound to impiement this
9、standara Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Iceland, Italy, Luxembourg, Netheriands, Norww, Portugal, Spain, Sweden, Switzerland, UNted Kingdom. O BSI 19% STD-BSI BS EN LE2b-ENGL 394b 13 lib29bb7 0583520 053 1 scope This standard specifies a method for testing the
10、ability of glassreinforced thermosetting plastics (GRP) pipes to withstand specified levels of initial ring deflection without dispiaying surface damage andor structurai failure. 2 Denitions For the purposes of this standard, the following definitions apply 2.1 vertical deflection (y) The vertical c
11、hange, 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/ de is the average of the measured external diameters (see 6.3.2), in metres; e is the average of the measured wall thickness of
12、 the pipe (see 6.3.1), in metses. 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 her from the structurai wa
13、ll. Page 3 EN 1226 : 1996 3 Principle 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 rst deflection level for surface damage andor shucturai fai
14、lure and at the second deflection level for stnictural faiiure (see 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)
15、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). 4 Apparatus 4.1 Compressive loading machine, comprkiig a system ca
16、pable 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 horizontaly orientated test piece of pipe conforming to clause 6 can be compressed verticaiy The machine shail be able to achi
17、eve and sustain in accordance with the periods specified in 7.3 the deflections or relative vertical deflections specified in the referring standard. 4.2 Load application surjes 4.2.1 Geneml 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
18、), or a combination of one such plate and one such bar, with their m4or axes perpendicular to and centred on the direction of application of load F by the compressive loading machine, as shown in gure 1. The surfaces to be in contact with the test piece shall be flat, smooth, clean and parallel. Pla
19、tes and beam bars shall have a length at least equal to the test piece (see clause 6) and have a thickness such that visible deformation does not occur during the test 4.2.2 Plutes The ph(s) shal have a width of at least 100 mm. 4.2.3 Beam bars Each beam bar shall have rounded edges, a flat face (se
20、e figure 1) without sharp edges and a width dependent upon the pipe as follows: a) for pipes with a nominai size not greater than DN 300 the width shall be (20 f 2) mm; b) for pipes of nominal sizes greater than DN 300 the width shall be (50 f 5) mm. The beam bars shal be so constructed and supporte
21、d that no other surface of the beam bar structure shal come into contact with the test piece during the test. O BSI 1996 Page 4 EN1226:1996 Plate I F F Plate ii#ilno Figure 1. Schematic diagram of the test arrangement ,Second relative deflection limit . twice the drop O 1 2 3 4 5 6 7 8 9 10 Time min
22、 Figure 2. Schematic diagram of load versus time O BSI 1996 STD-BSI BS EN 122b-ENGL 199b M lb2cibb7 0581522 2q W 4.3 D.imensional memuring Wes, capable of detem - the necessary dimensions (length, diameter, wall - the deflection of the test piece in the vertical direction to an accuracy of within fi
23、$ % of the maximum value. thickness) to an accuracy of within %,l mm; 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. 4.4 Taperature memuring daice, if applicable, capable of venfying c
24、onformity to the test temperature (see 7.1). 5 Bst pieces 6.1 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 96 The cut ends shall be smooth and perpen
25、dicular to the axis of the pipe. ho straight iines, to serve as reference lines, shall be dram on the inside or the outside along the length of the test piece at 180“ to each other. 6.2 Number The number of test pieces shall be as specified in the referring standard. 6.3 Determination of the dimensi
26、ons 6.3.1 Wall thickness Measure to within ,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 %,5 mm either of the a) The internal iamter,
27、 6, 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. following. Calculate the me
28、an beter, b) the full identifidon 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 andor plates were used; g) the test temperature; h) f
29、or each test piece details of any observed surface damage and the corresponding defldon(s) i) for each test piece details of any structural failure, together with the relevant deflection(s) and load(s) j) any factors which may have affected the results, such as any incidents or any operating details
30、 not k) the date of test (see 7.3); (see 7.3); specified in this standard; O BSI 1996 STD-BSI BS EN 322b-ENGL 1776 Lb24bb9 0583524 7T7 I 1226 : 1996 I BS 2782 : Part 12 : I I BSI - British Standards Institution Method 1214E : 1996 3SI is the independent national body responsible for preparing Britis
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