1、BRITISH STANDARD Plastics piping systems - Polyethylene (PE) tapping tees - Test method for impact resistance of an assembled tapping tee BS EN 1716 : 1997 BS 2782 : Part 11 : Method 1108T: 1997 The European Standard EN 1716 : 1997 has the stahis of a British Standard ICs 23.040.45 NO COPYING WITHOU
2、T BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN 1716-ENGL 1777 m 1b2Libb7 b22823 750 = AmdNo. Date BS EN 1716 : 1997 I Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technid Conunittee PRY61 Plastics piping
3、 systems and components, upon which the following bodies were represented: British Gas pic British Plastics Federation British Plumbhg Fittings Manufacturem Association British Vaive and Actuator Manufacturers Association Chartered Institution of Water and Ehvironment Management Department of the En
4、vironment (British Board of Agrbment) Department of the Environment (Building Research Establishment) Department of ?i.ansport Electricity Association Health and Safety Executive Institute of Building Control Institute of Materials Institution of Civil Engineem Institution of Gas Engineers National
5、Association of Plumbing, Heating, and Mechanical Services Contractom Pipeiine 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 follow
6、ing bodies were also represented in the draffing of this standard, through subcommitkes and panels: ERA Technology Lt. Engineering Equipment and Materials Users Association RApRATechnology Ltd. This British Standard, having been prepared under the direction of the sedor Board for Materiais and Chemi
7、cals, was pubiished under the authority of the Standards Board and comes inta effect on 15 June 1997 BSI 1997 The foilowing BSI references relate to the work on this standard: Committee reference PRV61 Draft for comment 95/121251 DC ISBN O 680 27391 1 STD-BSI BS EN L7Lb-ENGL 1997 lb24bb9 Ob22824 877
8、 BS EN 1716 : 1997 Contents page Committees responsible Inside hnt cover Nationai foreword ii Foreword 2 Method 3 1 Scope 3 2 Normative references 3 3 Principle 3 4 APP- 3 6 Test pieces 3 6 Conditioning 3 7 Procedure 3 8 Testreport 4 * m * O BSI 1997 i STD-BSI BS EN 171b-ENGL 1777 M Lb24bb7 0b22825
9、923 I BS EN 1716 : 1997 National foreword This British Standard has been prepared by Technical Committee PW61 and is the English language version of EN 1716 : 1997 Plastics piping systems - Polyethylene (FE) tupping tee - Test method for impact resistance of an assembled tupping tee, published by th
10、e European Committee for Standardization (CEN). It is incorporated into BS 2782 Methods of testing pu-stics: Part 11: Thennoplastics pipes, fittings und valves, as Method 1108T : 1997, for association with related test methods for plastics materials and plastics piping components. This test method h
11、as been prepared for reference by other standards under preparation by CEN for specification of plastics piping and ducting 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
12、 amendment of other nafional standards as practicable, but it should not be presumed to apply to any existing standard or specifidon 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 dust an
13、y requirements as appropriate. Cross-references Publication referred to EN 744 : 1995 Corresponding British Standard BS EN 744 : 1996 BS 2782 : Part 11 : Method 1108C : 1996 Plastics ?y und ducting systems - Thermoplastics pipes - Test method for resistance to extema? blows by ULe mthe-cloclc method
14、 NOTE. In the descriptors, the term shock resistance should be read as impact resistance to avoid confusion with methods for assessing resistance to thermal shock or hydraulic shock Warning note. This British Standard, which is identical with EN 1716 : 1997, does not necessarily detail ali the preca
15、utions 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 oblig
16、ations. Summary of pages This dkument comprises a front cover, an inside front cover, pages i and ii, the EN titie page, pages 2 to 4, an inside back cover and a back cover. ii O BSI 1997 STD-BSI BS EN L7Lb-ENGL 1997 W 1bZLibb9 Ob228Zb bbT EUROPEAN STANDARD EN 1716 NOEWIE EXJR0PEE”E EUROPAscHE NORM
17、January 1997 ICs 23.040.45 Desaiptors: Plastic tubes, fluid pipelines, polyethylene, junctions, impact tests, determination, shock resistance English version Plastics piping systems - Polyethylene PE) tapping tees - %st method for impact nisktance of an assembled tapping tee Systemes de canalisation
18、s en plastiques - Prises de branchement en polythyine (PE) - Mthade dessai pour la rsistance au choc dune prise de branchement assemble eines montierten Anbohr-TWch Kunststoff-RoMeitmgsyskme - Anbohr-Tstucke aus Polyethylen (PE) - Frfverhhren fur die Widemtandsfahgkeit gegen Schlagbeanspmchung This
19、European Standard was approved by CEN on 1!%6-3-02. CEN members are bound to comply with the CENKENELEC Internai Regdations 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 conce
20、rning such national standards may be obtained on appiicaion to Centra 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 under the responsibility of a CEN member into its own language
21、and notified to the Central Secretariat has the same status as the officiai versions. CENmembers are the national standards bodies of aus Belgium, Denmark, Finland, France, Germany, Greece, Iceiand, Ireiand, Italy, Luxembourg, Netherlands, Norway, Portugai, Spain, Sweden, Switzeriand and United King
22、dom. European Committee for Standadkation Comit Europen de Nonnakation Europisches Komitee fr Normung Centra Secretariat: rue de Stassart 36, B-1050 Brussels O 1997 Copyright reserved to CEN members Ref. No. EN 1716 : 1997 E - STD-BSI BS EN 171b-ENGL 1777 W LbZqbb9 Ob22827 5Tb Page 2 EN 1716 : 1997
23、Foreword This European Standard has been prepared by Technical Committee CENAC 155, Plastics piping systems and ducting systems, the secretariat of which is held by “L This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsemen
24、t, 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 incorporated in the System Sta.ndard(s) concerned This standard is one of a series of standards on test methods which
25、 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 European Stan- Austria, Belgium, Denmark, Fnland, France, Gemany, Greece, Iceland,
26、 Ireland, Im, Luxembourg, Netherlands, Norwax Pow, Spain, Sweden, Switzerland and the Unitxi Kingdom. O BSI 1997 STD-BSI BS EN 171b-ENGL 1997 m Lb2LibbS 0622828 Y32 Page 3 EN 1716 : 1997 1 scope 6 kst pieces This standard specifies a test method for the resistance to impact of polyethylene (PE) tapp
27、ing tees. This standard is applicable to PE tappa tees intended for the transport of fluids. 6.1 sampling The sampling requirements shail be as specified in the refe-g 6.2 Preparation of test pieces 2 Normative references This Standard incorporates by dated or undated reference, provisions from othe
28、r publications. These nonnative references are cited at the appropriate phes 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. F
29、or undated references the latest edition of the publication referred to applies. EN 744 : 1995 Plastics p2fln.g and ducting systems method for res.iStance to extemal - ThemLOplaStX pip - Tat blows by the rnd-the-lk method 3 Principle The cap of the tapping tee is subjected to an impact by means of a
30、 weight failing from a constant height, parallel 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 ahhghtness. The test is carried out at (O f 2) “C unl
31、ess otherwise specified in the referring standard. NOTE. It is assumed that the following test parameters are set by the standard making reference to this standard a) the sampling requirements (see 6.1); b) the number of test pieces (see 6.3); c) if applicable, the conditioning temperature (see clau
32、se 6). 4 Apparatus 4.1 A faUin.g weight testing machine, incorporating the foliowing basic components: a) main fm, 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 strik
33、er at the moment of hitting the tapping tee shall be not less than 95 % of the theoretical speed; b) str8c.q conforming to EN 744, but having a special nose consisting of a cylinder with a diameter of (50 f 2) mm and having a mass of (2500 f 20) g. 4.2 A rigid support, with a steel mandrel capable o
34、f maintaining the test piece in the position shown in figure 1, and means capable of preventing any rotation of the test piece during the test. The test pieces shall comprise a complete assembly of a pipe, a tapping tee and an end cap. The length of the pipe shall be such that L equals de (see figur
35、e 1). AU joints shail be assembled in accordance with the tapping tee manufacturers instructions. 6.3 Number of test pieces The number of test pieces shall be as specified in the referring standard. 6 Conditioning At least 24 h after the tapping tee has been assembled, the test piece shall be condit
36、ioned at (O f 2) OC, 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 seer will fall through the specified height (see 7.3) before removing the test piece from condit
37、ioning. Proceed immeiately to 7.2. 7.2 Within 30 s of removai 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 7.6, as applicable. 7.3 Drop a striker (4.1) on to the cap of the tapping tee from a height of (2000 k 10) mm
38、 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 opposite side of the cap. 7.6 After reconditioning under the same conditions, repeat the pro
39、cedure 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 visuallx without magnification, and record any crack or rupture, along with its position and its extent. 7.7 Using a liquid as an extend leak detector, test the airtightness of the test
40、 piece at 25 mbar at an ambient temperature of (23 f 2) “C. Record any evidence of leakage. O BSI 1997 STD-BSI BS EN L71b-ENGL 1777 M 1b24bb7 0b22827 377 Page 4 EN 1716 : 1997 B L = de Li = 0,5 L2 A Steelmandrel B Endcap P Point of impact Figure 1. P 8 “kst report The test report shall include the f
41、oiiowing information: a) the reference to this standard and to the referring 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 temperatwe; d) the mass of the fahg weight; e) the drop height; f) the
42、 number of test pieces tested; g) any type of failure anor evidence of leakage; h) any factors which may have affected the results, such as any incidents or any operating details not specied in this standard; i) the date of test. standard; O BSI 1997 - STD.BS1 BS EN L71b-ENGL 1777 D Lb2qbb Ob22830 0
43、90 BS EN 1716 : 1997 List of references See nationai foreword. O BSI 1997 BS EN 1716 : 1997 BS 2782 : Part 11 : 1997 Method 1108T : BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent donal body responsible for preparing British Standards. It presents
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