BS EN 1225-1996 塑料管道系统.玻璃增强热固性塑料管.潮湿条件下蠕变因子的测定和特定环状物的硬挺度计算.pdf

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1225 1996 BS 2782 Part 12 1214 C 1996 The European Standard EN 1225 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 Determination of the creep factor under wet conditions and calculation of the long-term specific ring stiffness 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 The following BSI references relate to the work on this standard Committee reference PRI/61 Draft for comment 93/313470 DC ISBN 0 580 26740 7 BS EN 1225 1996 Amendments issued since publication Amd. No.DateText affected 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 British Board of Agre ment Department of the Environment Building Research Establishment Department of Transport Electricity Association Federation of Civil Engineering Contractors Health and Safety cutive 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 Association of Consulting Engineers Engineering Equipment and Materials Users Association Institution of Mechanical Engineers RAPRATechnology Ltd. BS EN 1225 1996  BSI 1996i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Definitions3 4Principle4 5Apparatus4 6Test pieces5 7Determination of the dimensions of the test piece5 8Conditioning5 9Procedure5 10Calculation6 11Test report6 Annex Ainative Equal increments of lg [time]7 Table A.1 Equal increments of lg thand corresponding times th7 Figure 1Typical test arrangement5 ii BSI 1996 BS EN 1225 1996 National foreword This British Standard has been prepared by Technical Committee PRI/61 and is the English language version of EN 1225 1996 Plastics piping systems Glass-reinforced thermosetting plastics GRP pipes Determination of the creep factor under wet conditions and calculation of the long-term specific ring stiffness published by the European Committee for Standardization CEN. It is incorporated into BS 2782 s of testing plastics Part 12 Reinforced plastics pipes, fittings and valves as 1214C 1996 for association with related test s for plastics materials and plastics piping components. This test 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 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 until that standard/specification has been amended or revised to make reference to this and adjust any requirements as appropriate. No existing British Standard is superseded by this . Cross-references Publication referred toCorresponding British Standard EN 705BS EN 705 1995 BS 2782 Part 12 s 1220A to C 1995 Plastics piping systems Glass-reinforced thermosetting plastics GRP pipes and fittings s of regression analysis and their use EN 1228BS EN 1228 1996 BS 2782 Part 12 s A and B 1996 Plastics piping systems Glass-reinforced thermosetting plastics GRP pipes Determination of initial specific ring stiffness Warning note. This British Standard, which is identical with EN 1225 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 should be operated only by trained personnel. Compliance with a British Standard does not of itself confer immunity from legal obligations. w w w . b z f x w . c o m 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 and by any means reserved in all countries to CEN and its members. Ref. No. EN 1225 1996 E EUROPEAN STANDARDEN 1225 NORME EUROPE ENNE EUROPA ISCHE NORM June 1996 ICS 23.040.20 Descriptors Pipelines, plastic tubes, reinforced plastics, glass-reinforced plastics, thermosetting resins, creep tests, testing conditions, humidity, rigidity, flexing English version Plastics piping systems Glass-reinforced thermosetting plasticsGRP pipes Determination of the creep factor under wet conditions and calculation of the long-term specific ring stiffness Syste mes de canalisations en plastique Tubes en plastique thermodurcissable renforce de verre PRV De termination du facteur de fluage en conditions mouille es et calcul de la rigidite annulaire spe cifique a long terme Kunststoff-Rohrleitungssysteme Rohre aus glasfaserversta rkten duroplastischen Kunststoffen GFK Ermittlung des Kriechfaktors unter Feuchteeinflu und Berechnung der spezifischen Langzeit-Ringsteifigkeit 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. w w w . b z f x w . c o m Page 2 EN 1225 1996  BSI 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/CD 10468 GRP pipes and fittings Determination of long-term specific ring stiffness and creep factor of pipes under wet conditions, prepared by Subcommittee 6 of Technical Committee 138 of the International Organization for Standardization ISO. It is a modification of ISO/CD 10468 for reasons of applicability to other test conditions and alignment with texts of other standards on test s. The modifications are test parameters pressure, time, temperature are not specified; material-dependent or perance requirements are not given; editorial changes have been introduced. The material-dependent test parameters and/or perance requirements are incorporated in the referring standard. Annex A, which is inative, provides values of equal lg [time] increments. This standard is one of a series of standards on test s which support System Standards for plastics piping systems and ducting systems. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. w w w . b z f x w . c o m Page 3 EN 1225 1996  BSI 1996 1 Scope This standard specifies a for determining by extrapolation both the long-term specific ring stiffness and the creep factor for glass-reinforced thermosetting plastics pipes under wet conditions. 2 Normative references This standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 705Plastics piping systems Glass-reinforced thermosetting plastics GRP pipes and fittings s for regression analyses and their use EN 1228 Plastics piping systems Glass-reinforced thermosetting plastics GRP pipes Determination of initial specific ring stiffness 3 Definitions For the purposes of this standard, the following definitions apply 3.1 compressive load F The load applied to a pipe to cause a diametric deflection. It is expressed in newtons. 3.2 specific ring stiffness S A physical characteristic of the pipe which is a measure of the resistance to ring deflection under external load. This characteristic is determined by testing and is defined, in newtons per square metre, by the equation 1S E 3 I dm3 where Eis the apparent modulus of elasticity as determined in the ring stiffness test, in newtons per square metre; Iis the moment of inertia the second moment of area in the longitudinal direction per metre length, expressed in metres to the fourth power per metre, i.e. I e3 12 where eis the wall thickness of the pipe, in metres; dmis the mean diameter see 3.3 of the pipe, in metres. 3.3 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 de2 e where diis the average of the measured internal diameters see 7.3, in metres; deis the average of the measured external diameters see 7.3, in metres; eis the average of the measured wall thicknesses of the pipe see 7.1, in metres. 3.4 initial specific ring stiffness S0 The initial value of S see 3.2 obtained by testing in accordance with EN 1228. It is expressed in newtons per square metre. 3.5 long-term wet specific ring stiffness at position 1 Sx,1,wet The value of S at the reference position, position 1 see clause 6 and 9.2 at x years, obtained by extrapolation of long-term deflection measurements at a constant load under wet conditions see 3.2 and 9.2. It is expressed in newtons per square metre. 3.6 calculated long-term wet specific ring stiffness Sx,wet The calculated value of S at x years given by the following equation Sx,wet S03 ax,wet2 where xis the time specified in the referring standard, in years; ax,wetis the wet creep factor see 3.7; S0is the initial specific ring stiffness see 3.4, in newtons per square metres. It is expressed in newtons per square metre. 3.7 wet creep factor ax, wet The ratio of the long-term specific ring stiffness determined under wet conditions to the initial specific ring stiffness, both measured at reference position 1 see 9.2. It is given by the following equation 3ax, wet Sx,1,wet S0;1 where S0;1is the initial specific ring stiffness at positon 1 determined in accordance with EN 1228, in newtons per square metre. w w w . b z f x w . c o m Page 4 EN 1225 1996  BSI 1996 3.8 vertical deflection y The vertical change in diameter of a pipe in response to a diametric compressive load see 3.1. It is expressed in metres. 3.9 long-term vertical deflection yx,1,wet The value of the vertical deflection, y, at the reference position 1, see 9.2, at x years obtained by extrapolation of long-term deflection measurements at a constant load under wet conditions see 3.1 and 9.2. It is expressed in metres. 3.10 deflection coefficient f A dimensionless factor which takes into account the theory of second order. It is given by the following equation f 1860 2500 3 yx,1,wet/ dm 3 10254 where yx,1,wetis the long-term vertical deflection see 3.9, in metres; dmis the mean diameter see 3.3, in metres. 4 Principle A cut length of pipe supported horizontally is loaded throughout its length to compress it diametrically to a specified vertical deflection. NOTE 1. Load application surfaces of bearing plates or beam bars are considered equally valid. The pipe is immersed in water at a specified temperature for a period of time during which the load remains constant and the vertical deflection is measured at intervals. The long-term deflection is estimated by extrapolation. From this deflection and the load, the long-term specific ring stiffness under wet conditions is calculated. The wet creep factor is then determined from the long-term wet specific ring stiffness and the initial specific ring stiffness of the same test piece. NOTE 2. It is assumed that the following test parameters are set by the standard making reference to this standard a the time to which the values are to be extrapolated see 3.6 and 10.1; b the test temperature see 5.3 and 9.1; c the length of the test piece and its permissible deviation see clause 6; d if applicable, conditioning, e.g. temperature and environment, and its period see clause 8; e the duration for maintaining the estimated load on the test piece see 9.4. 5 Apparatus 5.1 Compressive loading machine, comprising a system capable of applying a load, without shock, through two parallel load application surfaces co