1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1716 : 1997 BS 2782
2、 : Part 11 : Method 1108T : 1997 The European Standard EN 1716 : 1997 has the status of a British Standard ICS 23.040.45 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Plastics piping systems Polyethylene (PE) tapping tees Test method for impact resistance of an assembled tap
3、ping teeBS EN 1716 : 1997 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 June 1997 BSI 1997 The following BSI references relate to the work on this s
4、tandard: Committee reference PRI/61 Draft for comment 95/121251 DC ISBN 0 580 27391 1 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 Committee PRI/61 Plastics piping
5、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 Environment Management Department of the E
6、nvironment (British Board of Agre ment) Department of the Environment (Building Research Establishment) Department of Transport Electricity Association Health and Safety Executive Institute of Building Control Institute of Materials Institution of Civil Engineers Institution of Gas Engineers Nationa
7、l 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 fol
8、lowing bodies were also represented in the drafting of this standard, through subcommittees and panels: ERA Technology Ltd. Engineering Equipment and Materials Users Association RAPRA Technology Ltd.BS EN 1716 : 1997 BSI 1997 i Contents Page Committees responsible Inside front cover National forewor
9、d ii Foreword 2 Method 3 1 Scope 3 2 Normative references 3 3 Principle 3 4 Apparatus 3 5 Test pieces 3 6 Conditioning 3 7 Procedure 3 8 Test report 4ii BSI 1997 BS EN 1716 : 1997 National foreword This British Standard has been prepared by Technical Committee PRI/61 and is the English language vers
10、ion of EN 1716 : 1997 Plastics piping systems Polyethylene (PE) tapping tee Test method for impact resistance of an assembled tapping tee, published by the European Committee for Standardization (CEN). It is incorporated into BS 2782 Methods of testing plastics: Part 11: Thermoplastics pipes, fittin
11、gs and valves, as Method 1108T : 1997, 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 plastics piping and ducting systems and components
12、. 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 cont
13、ains 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. Cross-references Publication referred to Corresponding British Standard EN 744 : 1995 BS EN 744 : 1996 BS 2782
14、 : Part 11 : Method 1108C : 1996 Plastics piping and ducting systems Thermoplastics pipes Test method for resistance to external blows by the round-the-clock method NOTE. In the descriptors, the term shock resistance should be read as impact resistance to avoid confusion with methods for assessing r
15、esistance to thermal shock or hydraulic shock. Warning note. This British Standard, which is identical with EN 1716 : 1997, 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 s
16、afety 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. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 4,
17、 an inside back cover and a back cover.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 1997 Copyright reserved to CEN members Ref. No. EN 1716 : 1997 E EUROPEAN STANDARD EN 1716 N
18、ORME EUROPE ENNE EUROPA ISCHE NORM January 1997 ICS 23.040.45 Descriptors: Plastic tubes, fluid pipelines, polyethylene, junctions, impact tests, determination, shock resistance English version Plastics piping systems Polyethylene (PE) tapping tees Test method for impact resistance of an assembled t
19、apping tee Syste mes de canalisations en plastiques Prises de branchement en polye thyle ne (PE) Me thode dessai pour la re sistance au choc dune prise de branchement assemble e Kunststoff-Rohrleitungssysteme Anbohr-T-Stu cke aus Polyethylen (PE) Pru fverfahren fu r die Widerstandsfa higkeit gegen S
20、chlagbeanspruchung eines montierten Anbohr-T-Stu cks This European Standard was approved by CEN on 1996-09-02. 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 alte
21、ration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to Central Secretariat or any CEN member. This European Standard exists in three offical versions (English, French, German). A version in any other language made by translation u
22、nder 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, Nethe
23、rlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1716 : 1997 BSI 1997 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 sha
24、ll be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 1997, and conflicting national standards shall be withdrawn at the latest by July 1997. The material-dependent parameters and/or performance requirements are incorporate
25、d in the System Standard(s) concerned. 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
26、bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.Page 3 EN 1716 : 1997 BSI 1997 1 Scope This standard specifies a test method f
27、or the resistance to impact of polyethylene (PE) tapping tees. This standard is applicable to PE tapping tees intended for the transport of fluids. 2 Normative references This Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cite
28、d 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 p
29、ublication referred to applies. EN 744 : 1995 Plastics piping and ducting systems Thermoplastics pipes Test method for resistance to external blows by the round-the-clock method 3 Principle The cap of the tapping tee is subjected to an impact by means of a weight falling from a constant height, para
30、llel to the axis of the pipe onto which the tapping tee is fused. After two impacts from opposite directions parallel to the main axis of the pipe, the tee is inspected for visible damage and for loss of airtightness. The test is carried out at (0 2) C unless otherwise specified in the referring sta
31、ndard. NOTE. It is assumed that the following test parameters are set by the standard making reference to this standard: a) the sampling requirements (see 5.1); b) the number of test pieces (see 5.3); c) if applicable, the conditioning temperature (see clause 6). 4 Apparatus 4.1 A falling weight tes
32、ting machine, incorporating the following basic components: a) main frame, with guide rails or a guiding tube fixed in the vertical position to accommodate a striker and means to release it to fall vertically and freely. When calibrated, the speed of the striker at the moment of hitting the tapping
33、tee shall be not less than 95 % of the theoretical speed; b) striker, conforming to EN 744, but having a special nose consisting of a cylinder with a diameter of (50 2) mm and having a mass of (2500 20) g. 4.2 A rigid support, with a steel mandrel capable of maintaining the test piece in the positio
34、n shown in figure 1, and means capable of preventing any rotation of the test piece during the test. 5 Test pieces 5.1 Sampling The sampling requirements shall be as specified in the referring standard. 5.2 Preparation of test pieces The test pieces shall comprise a complete assembly of a pipe, a ta
35、pping tee and an end cap. The length of the pipe shall be such that L equals d e (see figure 1). All joints shall be assembled in accordance with the tapping tee manufacturers instructions. 5.3 Number of test pieces The number of test pieces shall be as specified in the referring standard. 6 Conditi
36、oning At least 24 h after the tapping tee has been assembled, the test piece shall be conditioned at (0 2) C, unless otherwise specified by the referring standard, for 4 h in air or 2 h in a liquid bath. 7 Procedure 7.1 Condition the test piece in accordance with clause 6 and ensure that the striker
37、 will fall through the specified height (see 7.3) before removing the test piece from conditioning. Proceed immediately to 7.2. 7.2 Within 30 s of removal from conditioning, slip the test piece over the mandrel as shown in figure 1 and strike the test piece in accordance with 7.3 or 7.5,a s applicab
38、le. 7.3 Drop a striker (4.1) on to the cap of the tapping tee from a height of (2000 10) mm along an axis parallel to that of the pipe onto which the tapping tee is assembled. The point of impact, P , on the end cap shall be situated as shown in figure 1. 7.4 Invert the assembly in order to hit the
39、opposite side of the cap. 7.5 After reconditioning under the same conditions, repeat the procedure of 7.2 and 7.3 to strike the cap on the opposite side of the stem of the tapping tee. 7.6 Examine the joint visually, without magnification, and record any crack or rupture, along with its position and
40、 its extent. 7.7 Using a liquid as an external leak detector, test the airtightness of the test piece at 25 mbar at an ambient temperature of (23 2) C. Record any evidence of leakage.Page 4 EN 1716 : 1997 BSI 1997 L = d e L 1 = 0,5 L 2 A Steel mandrel B End cap P Point of impact Figure 1. 8 Test rep
41、ort The test report shall include the following information: a) the reference to this standard and to the referring standard; b) the complete identification of the sample, including the type of material and the nominal dimensions of the pipe and of the tapping tees; c) the test temperature; d) the m
42、ass of the falling weight; e) the drop height; f) the number of test pieces tested; g) any type of failure and/or evidence of leakage; h) any factors which may have affected the results, such as any incidents or any operating details not specified in this standard; i) the date of test. BSI 1997 BS E
43、N 1716 : 1997 List of references See national foreword.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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