1、BSI Standards PublicationBS EN 16397-1:2014Flexible couplingsPart 1: Performance requirementsBS EN 16397-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 16397-1:2014.The UK participation in its preparation was entrusted to TechnicalCommittee B/505, Wastew
2、ater engineering.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Publishe
3、d by BSI StandardsLimited 2014ISBN 978 0 580 77787 5ICS 23.040.60Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2014.Amendments issued since publicati
4、onDate Text affectedBS EN 16397-1:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16397-1 November 2014 ICS 23.040.60 English Version Flexible couplings - Part 1: Performance requirements Raccords flexibles - Partie 1: Exigences de performance Flexible Kupplungen - Teil 1: Leistungsanforder
5、ungen This European Standard was approved by CEN on 30 August 2014. 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 bibliographica
6、l references concerning such national standards may be obtained on application to the CEN-CENELEC 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 o
7、f a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Ma
8、cedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION E
9、UROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16397-1:2014 EBS EN 16397-1:2014EN 16397-1:2014 (E) 2 Contents Page Foreword 3 1 Sc
10、ope 4 2 Normative references 4 3 Terms and definitions .4 4 Symbols and abbreviations 8 5 Product characteristics .8 5.1 General 8 5.2 Materials .8 5.3 Dimensional tolerances 8 5.4 Tightness of joint assemblies 8 5.4.1 General 8 5.4.2 Test pressures .9 5.4.3 Angular deflection .9 5.4.4 Shear resista
11、nce and deformation .9 5.4.5 Thermal cycling. 10 5.5 Strength of clamping and shear bands 10 5.5.1 Clamping band assemblies . 10 5.5.2 Testing of means of fixing clamping and shear band adjustor strips 10 5.6 Reaction to fire 10 5.6.1 Use below ground . 10 5.6.2 Use above ground. 11 5.7 Durability .
12、 11 5.7.1 General . 11 5.7.2 Durability of watertightness 11 5.8 Dangerous substances 11 6 Test methods . 12 6.1 Tightness test methods for joint assemblies 12 6.1.1 General . 12 6.1.2 Internal pressure . 12 6.1.3 Vacuum 12 6.1.4 Deflection test . 12 6.1.5 Shear test . 13 6.1.6 Thermal cycling test
13、. 15 BS EN 16397-1:2014EN 16397-1:2014 (E) 3 Foreword This document (EN 16397-1:2014) has been prepared by Technical Committee CEN/TC 165 “Waste water engineering”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication
14、 of an identical text or by endorsement, at the latest by May 2015 and conflicting national standards shall be withdrawn at the latest by August 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be
15、 held responsible for identifying any or all such patent rights. EN 16397 “Flexible couplings” contains the following parts: Part 1: Performance requirements; Part 2: Characteristics and testing for metal banded flexible couplings, adaptors and bushes. This European Standard takes into account the r
16、equirements of EN 476. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of
17、 Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 16397-1:2014EN 16397-1:2014 (E) 4 1 Scope This European St
18、andard specifies the performance requirements for flexible couplings and adaptors and bushes for use with pipes and fittings in drain and sewer systems, usually operated under gravity and periodic hydraulic surcharge, both above and below ground inside or outside buildings and intended to connect pi
19、pes for: repair of damaged pipelines; connecting pipes of different materials and/or diameters; jointing short/cut lengths of pipe; jointing specific pipe systems; jointing post-inserted preformed junctions. Typically a coupling consists of a moulded or extruded flexible sleeve with two clamping ban
20、ds with or without a shear band. The clamping bands enable the sleeve to form a seal with the pipes to be jointed. The shear band gives resistance to shear forces. Connections may be made between pipes which cannot be satisfactorily jointed by a coupling alone, of dissimilar sizes or material, by us
21、ing an appropriate bush or bushes with the coupling or by using an appropriate adaptor. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. Fo
22、r undated references, the latest edition of the referenced document (including any amendments) applies. EN 476:2011, General requirements for components used in drains and sewers EN 1055:1996, Plastics piping systems - Thermoplastics piping systems for soil and waste discharge inside buildings - Tes
23、t method for resistance to elevated temperature cycling EN 13501-1, Fire classification of construction products and building elements Part 1: Classification using data from reaction to fire tests EN 16397-2, Flexible couplings Part 2: Characteristics and testing for metal banded flexible couplings,
24、 adaptors and bushes 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 flexible coupling moulded or extruded and joined flexible sleeve, with or without bushes or shear band, with adjustable clamping bands by which it is secured to the ends of
25、pipes with outside diameters within the tolerance range covered by the coupling Note 1 to entry: Examples are shown in Figures 1 to 3. BS EN 16397-1:2014EN 16397-1:2014 (E) 5 Key 1 pipe 1 2 pipe 2 3 drive unit 4 adjustor unit 5 shear band 6 sleeve 7 clamping band b width of sleeve d3outside diameter
26、 Figure 1 Example of a flexible coupling with shear band Key 1 shear band adjustors Figure 2 Example of elevation showing shear band adjustors BS EN 16397-1:2014EN 16397-1:2014 (E) 6 Key 1 pipe 1 2 clamping band with drive unit 3 sleeve 4 pipe 2 b width of sleeve d3outside diameter NOTE More than on
27、e drive unit could be used where required. Figure 3 Example of flexible coupling without shear band 3.2 flexible adaptor moulded or extruded stepped flexible sleeve with adjustable clamping bands by which it is secured to pipes of different outside diameters beyond the tolerance range for a flexible
28、 coupling which may incorporate an abrupt change of section Note 1 to entry: An example of a metal banded adaptor is shown in Figure 4. BS EN 16397-1:2014EN 16397-1:2014 (E) 7 Key 1 pipe 1 2 pipe 2 3 moulded rubber 4 drive unit 5 clamping band b width of sleeve d3outside diameter NOTE More than one
29、drive unit could be used where required. Figure 4 Example of metal banded adaptor 3.3 bush moulded or extruded and joined elastomeric section only used with couplings having shear bands to compensate for variations between the outside diameters of pipes which cannot be satisfactorily joined by a cou
30、pling alone 3.4 nominal size of a flexible coupling and an adaptor maximum outside diameter of the pipes with which a flexible coupling or adaptor can be used 3.5 shear band component for bearing of shear loads after installation 3.6 clamping band means of clamping the flexible coupling to a pipe us
31、ing a specified force 3.7 adjustor strip shear band fixing means of clamping the shear band to the flexible coupling using a specified force Note 1 to entry: See Figure 2. 3.8 stopper mechanical means of sealing the open end of a pipe, typically used in a pressure test BS EN 16397-1:2014EN 16397-1:2
32、014 (E) 8 4 Symbols and abbreviations Symbol Description Unit FEnominal self-weight of stopper (for tightness testing) kN FRnominal self-weight of pipe (which may be obtained by calculation - volume and density) kN FSshear load kN FWthe weight of water in pipe kN FZthe applied load kN C1distance bet
33、ween seal and load application line for FZm C2distance between right hand support and load line for FEm Ssdistance between seal and support of loaded pipe m 5 Product characteristics 5.1 General Flexible couplings and adaptors and bushes shall meet the product characteristics of this European Standa
34、rd. When fitted according to the manufacturers instructions, flexible couplings and adaptors and bushes shall not damage or distort the pipes to which they are connected. Flexible couplings and adaptors and bushes shall be free from such defects as would impair their function when in service. 5.2 Ma
35、terials All materials used in flexible couplings and adaptors and bushes shall comply with the specific material characteristics in accordance with EN 16397-2. 5.3 Dimensional tolerances NOTE The requirements on tolerances and dimensions are specified in EN 16397-2. 5.4 Tightness of joint assemblies
36、 5.4.1 General Joint assemblies using flexible couplings and adaptors and bushes shall meet the requirements of 5.4.2, 5.4.3, 5.4.4 and 5.4.5. Couplings and adaptors shall be tested in assemblies comprising both rigid pipes, both flexible pipes and a combination of rigid pipes with flexible pipes. W
37、hen bushes are supplied as part of the product range a minimum of one test per test configuration shall include at least one bush/coupling combination. In addition when subjected to the test specified in the material specific part of this European Standard (EN 16397-2), the maximum sized coupling as
38、sembled with the thickest bush supplied and the appropriate pipes from each designated size group and test mode shall be tested at the recommended assembly torque. BS EN 16397-1:2014EN 16397-1:2014 (E) 9 5.4.2 Test pressures Joint assemblies using couplings incorporating a shear band shall meet the
39、requirements of 5.4.3 and 5.4.4, when tested at an internal pressure of 100 kPa (1,0 bar) in accordance with 6.1.2. Joint assemblies using couplings or adaptors without a shear band shall meet the requirements of 5.4.3 and 5.4.4, when tested at an internal pressure of 50 kPa (0,5 bar) in accordance
40、with 6.1.2. If products covered by this standard are required to withstand continuous working under low pressure (i.e. continuous surcharge flow is expected, e.g. for water transfer pipelines), the test pressure shall be higher than specified above for either type of coupling or adaptor. The higher
41、test pressure should be agreed between manufacturer and specifier. Joint assemblies using couplings incorporating a shear band shall meet the requirements of 5.4.3 and 5.4.4 when tested with a vacuum pressure of -0,25 bar (0,75 bar absolute) when tested in accordance with 6.1.3. A component of a joi
42、nt assembly shall not be used in more than one test. 5.4.3 Angular deflection One pipe in a joint assembly shall be deflected by the method described in 6.1.4 by the amount specified in Table 1 for its relevant nominal size and when so deflected shall withstand the test pressures specified in 5.4.2
43、for 5 min without visible leakage or more than 10 % change in pressure after the pressure has stabilised. Table 1 Deflection Nominal coupling size mm Deflectionamm/m Deflection degrees Up to 200 80 4,6 201 to 500 30 1,7 501 to 800 20 1,1 800 10 0,6 aPer metre of deflected pipe length (see Figure 5).
44、 Where a joint assembly is made up with pipes of two different sizes the deflection appropriate to the larger pipe shall be applied. 5.4.4 Shear resistance and deformation 5.4.4.1 General A joint assembly shall withstand short term and long term shear load when tested according to 6.1.5. This should
45、 be either 6.1.5.1, 6.1.5.3 and 6.1.5.4 or 6.1.5.2, 6.1.5.3 and 6.1.5.4. 5.4.4.2 Joint assemblies connecting rigid pipes For joint assemblies connecting pipelines of materials which do not undergo significant diametral deformation under shear test load (e. g. vitrified clay, concrete, cast-iron, duc
46、tile iron, steel and fibre-cement) an external load FZ(see Formula 1) shall be applied to one pipe to produce a minimum shear load at the joint assembly of 25 N per millimetre of nominal size. The joint assembly shall withstand the test pressures specified in 5.4.2 for 15 min without visible leakage
47、 or more than 10 % change in pressure after the pressure has stabilised. The clamping bands, shear bands, their adjustors and any means of attaching adjustors shall not exhibit any obvious signs of physical distress or degradation. BS EN 16397-1:2014EN 16397-1:2014 (E) 10 5.4.4.3 Joint assemblies co
48、nnecting flexible and rigid to flexible pipes For joint assemblies connecting pipelines of materials which undergo significant diametral deformation under shear test load (typical examples include PVC-U, PE, PP and low stiffness GRP) the applied load shall be that required to produce a diametral def
49、ormation of (10 1,0) % on the external diameter where both pipes in an assembly are flexible and (5 0,5) % on the external diameter where one pipe in an assembly is rigid. When testing flexible pipes, there should be no gap between the supporting block and the pipe above. The clamping bands, shear bands, their adjustors and any means of attaching adjustors shall not exhibit any obvious signs of physical distress or degradation. The joint assembly shall withstand a test pressure in accordance with 5.4.2 for 15 min without visible leakage or more than
