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1、BRITISH STANDARD BS EN 1277:2003 Plastics piping systems Thermoplastics piping systems for buried non-pressure applications Test methods for leaktightness of elastomeric sealing ring type joints The European Standard EN 1277:2003 has the status of a British Standard ICS 23.040.80 ? Licensed Copy: sh
2、effieldun sheffieldun, na, Sat Oct 28 07:00:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1277:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 April 2004 BSI 21 April 2004 ISBN 0 580 43669 1 National foreword This British Standa
3、rd is the official English language version of EN 1277:2003. It supersedes BS EN 1277:1996 which is withdrawn. Clause 6(c) does not imply an additional deflection for those cases where the referring standard specifies a deflection. The UK participation in its preparation was entrusted by Technical C
4、ommittee PRI/88, Plastic Piping Systems, to Subcommittee PRI/88/4, Pressure, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publica
5、tions referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the neces
6、sary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or
7、proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. The
8、 BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPIS
9、CHE NORM EN 1277 December 2003 ICS 23.040.80Supersedes EN 1277:1996 English version Plastics piping systems - Thermoplastics piping systems for buried non-pressure applications - Test methods for leaktightness of elastomeric sealing ring type joints Systmes de canalisations en plastiques - Systmes d
10、e canalisations thermoplastiques pour applications enterres sans pression - Mthodes dessai dtanchit des assemblages bague dtanchit en lastomre Kunststoff-Rohrleitungssysteme - Erdverlegte Rohrleitungssysteme aus Thermoplasten fr drucklose Anwendungen - Prfverfahren fr die Dichtheit von elastomeren D
11、ichtringverbindungen This European Standard was approved by CEN on 3 March 2003. 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 b
12、ibliographical references concerning such national standards may be obtained on application to the Management Centre 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
13、of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
14、 Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by a
15、ny means reserved worldwide for CEN national Members. Ref. No. EN 1277:2003 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1277:2003 (E) 2 Foreword This European Standard (EN 1277:2003) has been prepared by Technical Committee CEN /TC
16、155, “Plastics piping systems and ducting systems“, the secretariat of which is held by NEN. 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 June 2004, and conflicting national standards shall be
17、withdrawn at the latest by June 2004. Annex A is normative. This document supersedes EN 1277:1996. The modifications are: The deflection of the socket is now permitted to be greater than specified if by deflecting the spigot to the specified amount the socket, without applying load to it, is deflect
18、ed to more than specified. The reason is that experience with testing large diameter pipes in accordance with the 1996 version has shown that for some pipe designs a deflection of 10 % of the spigot resulted in a deflection larger than 5% of the socket without applying any load to it. This is the ma
19、jor reason for the revision. A support for the profiles under the deflection device, see Figure 2, are specified in cases where there is a risk that the profiles are deflected too much when deflecting the spigot or socket. Figure 4 has been added to clarify the description of the deflection devices.
20、 The procedure for determining and applying the deflection has been described in more details, see 6.2. A number of editorial changes including a more logic order of the description of the test equipment and test procedure have been introduced. The material-dependent parameters and/or performance re
21、quirements are incorporated 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 t
22、he following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Licensed
23、 Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1277:2003 (E) 3 1 Scope This European standard specifies three basic test pressures for determining the leaktightness of elastomeric sealing ring type joints for buried thermoplastics non-pressure p
24、iping systems. Unless otherwise specified in the referring standard, the methods pressures used are the following: p1: internal negative air pressure (partial vacuum); p2: a low internal hydrostatic pressure; p3: a higher internal hydrostatic pressure. It also describes four test conditions under wh
25、ich the test can be executed, as follows: A:without any additional diametric or angular deflection; B:with diametric deflection; C:with angular deflection; D:with simultaneous angular and diametric deflection. These conditions can be applied individually or in combination. The applicable selection o
26、f the method(s) and the condition(s) should be specified in the referring standard. 2 Principle A test piece assembled from pipes and/or fittings is subjected to a specific initial internal negative air pressure, p1 followed by a low specific initial internal hydrostatic pressure, p2 and a higher in
27、ternal hydrostatic pressure, p3. During testing the joint may be subjected to diametric and/or angular deflection(s). The referring product standard shall specify which of the test pressures and deflection conditions have to be carried out. Each pressure is maintained for a specific period during wh
28、ich the joint is monitored for leakage (see clause 6). NOTE 1It is assumed that the following test parameters are set by the standard making reference to this standard: a) the test pressure(s), p1 see item d) of 6.1, p2 see item f) of 6.1 and p3 see item g) of 6.1, as applicable, and the percentage
29、of loss of partial vacuum see item d) of 6.1; b) the required diametric and/or angular deflections and their combination with each other and/or the test pressure(s) NOTE 2As a consequence of the revision of EN 1277:1996 a modification of test parameters given in referring European Standards on therm
30、oplastics underground drainage and sewerage pipes published before this European Standard may be required (see annex A). 3 Apparatus 3.1 General The apparatus shall consist of a jig or any other arrangement capable of: a) applying the specified diametric and/or angular deflection; b) applying the sp
31、ecified test pressure(s), positive or negative; c) maintaining the test assembly in the required position throughout the test; d) resisting the forces resulting from the mass of the water in the test assembly and from the applied hydrostatic test pressure(s) during the test period. The apparatus sha
32、ll not otherwise support the joint against the internal test pressure. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1277:2003 (E) 4 A typical arrangement, allowing angular and diametric deflection, is shown in Figure 1. 3.2 Apparatus T
33、he apparatus shall include the following items which all shall be capable of resisting the forces and pressures generated during the test. 3.2.1End sealing devices, having a size and using a sealing method appropriate to seal the non-jointed ends of the test assembly. The devices shall be restrained
34、 in a manner that does not exert longitudinal forces on the joint at positive pressures; 3.2.2Hydrostatic pressure source, connected to one of the sealing devices, or to the test piece, and capable of applying and maintaining the specified pressure see items f) and g) of 6.1; 3.2.3Negative air press
35、ure source, connected to one of the sealing devices, or to the test piece, and capable of applying and maintaining the specified internal negative air pressure for the specified time. See item d) of 6.1; 3.2.4Arrangement, capable of venting air from the assembly; 3.2.5Pressure measuring devices, cap
36、able of checking conformity to the specified test pressure (see item d), f) and g) of 6.1). When testing with diametric deflection is required the following items shall also be included: 3.2.6Mechanical or hydraulic device, capable of applying the necessary diametric deflection to the spigot see ite
37、m b) of 6.1 and acting on a beam which is free to move in the vertical plane square to the axis of the pipe. For pipes with a diameter equal to or greater than 400 mm, each beam can be elliptically shaped to suit the expected shape of the pipe when deflected as required, see Figure 4. The length of
38、the beam or the curved part of the beam shall be greater than the contact area with the deflected spigot. The width, b1, see Figure 1, shall depend upon the external diameter, de, of the pipe as follows: b1 = 100 mm for de 710 mm; b1 = 150 mm for 710 mm 1000 mm. 3.2.7Mechanical or hydraulic device,
39、capable of applying the necessary diametric deflection to the socket see item b) of 6.1 and acting on a beam which is free to move in the vertical plane square to the axis of the socket. The length of the beam or the curved part of the beam shall be greater than the contact area with the deflected s
40、ocket. For pipes with a diameter equal to or greater than 400 mm, each beam may be elliptically shaped to suit the expected shape of the socket when deflected as required, see Figure 4; The width, b2, shall depend upon the external diameter, de, of the pipe as follows: b2 = 30 mm for de 110 mm; b2 =
41、 40 mm for 110 mm 315 mm. When there is a risk that the stiffening elements (profiles) of a structured wall pipe or socket will deflect more than 0,1 times the profile height, the clamps shall be modified so they will come into contact with the pipe wall between the profiles when the profile is defl
42、ected to between 0,9 times and 0,95 times the profile height, (see Figure 2). Such modifications shall be made from wood or less flexible materials. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1277:2003 (E) 5 Key GVacuum or pressure g
43、auge EElliptical beam when applicable WAdjustable support PPipe or fitting with spigot end RPipe or fitting with socket SSocket support VConnection to pressure source totAngular deflection applied b1, b2Width of clamp (see 3.2.6 and 3.2.7) LLength of spigot-ended pipe or fitting, where L de or L 100
44、0, whichever is the greater, in millimetres L1Distance between socket mouth and clamp Figure 1 Typical arrangement for applying diametric distortion and angular deflection Key 1Modified loading plate hpConstruction height HpProfile height of the loading plate; 0,9hp Hp 0,95hp Figure 2 Example of mod
45、ified loading plate 4 Test pieces The test piece shall comprise an assembly of (a) pipe section(s) and/or fitting(s) including at least one elastomeric sealing ring joint. The joint to be tested shall be assembled in accordance with the manufacturers instructions where available. The length of the t
46、est pieces in pipe form shall be as specified in Figure 1. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 07:00:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1277:2003 (E) 6 The same test assembly shall be used for the entire specified test regime. NOTETo reduce the volume of water needed
47、 a sealed pipe or mandrel can be located within the test piece provided it is 100 % tight to the test pressures applied, and it is not of a shape that may provide support against possible deformation during the test. When a fitting or any other ancillary component is to be tested, the appropriate en
48、d of the test piece shown in Figure 1 is to be replaced by that component. The component is fixed to the test rig and plugged in its open end(s) as appropriate for its design. 5 Test temperature When testing with internal hydrostatic pressure using water the test temperature shall be (19 9) C. When
49、testing with internal partial vacuum the test temperature shall be in the range of (23 5) C and the temperature variation shall not exceed 2 C during the testing. 6 Procedure 6.1 General Carry out the following procedures at the specified temperatures. a) Mount the test piece with sealed ends in the apparatus; b) When applicable, apply the specified movement of the loading beams for diametric deflection of the spigot and/or