1、BSI Standards PublicationBS EN 14420-7:2013Hose fittings with clamp unitsPart 7: Cam locking couplingsBS EN 14420-7:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14420-7:2013.It supersedes BS EN 14420-7:2004 which is withdrawn.The UK participation in its
2、preparation was entrusted to TechnicalCommittee PRI/66, Rubber and plastics tubing, hoses and hoseassemblies.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
3、are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 72877 8ICS 23.040.70Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theS
4、tandards Policy and Strategy Committee on 31 July 2013.Amendments issued since publicationDate Text affectedBS EN 14420-7:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14420-7 July 2013 ICS 23.040.70 Supersedes EN 14420-7:2004+A1:2007English Version Hose fittings with clamp units - Part 7
5、: Cam locking couplings Raccords pour flexibles avec demi-coquille - Partie 7: Raccords cames Schlaucharmaturen mit Klemmfassungen - Teil 7: Hebelarmkupplungen This European Standard was approved by CEN on 15 May 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which s
6、tipulate 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 CEN-CENELEC Management Centre or to any CEN member. This Europe
7、an 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are
8、the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roma
9、nia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means r
10、eserved worldwide for CEN national Members. Ref. No. EN 14420-7:2013: EBS EN 14420-7:2013EN 14420-7:2013 (E) 2 Contents Page Foreword 3 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions .7 4 Requirements .7 4.1 Construction .7 4.2 Temperatures .7 5 Survey .8 6 Types of conne
11、ction . 10 7 Designation . 11 8 Dimensions 11 8.1 General . 11 8.2 Coupler types 11 8.3 Cam arm (item No. 2) 14 8.4 Pin (item No. 3) 17 8.5 Ring (item No. 4) . 17 8.6 Main gasket (item No. 5) . 18 8.7 Thread gasket (item No. 6) . 18 8.8 Adapter types 18 9 Materials 21 9.1 General . 21 9.2 Coupler an
12、d adapter body . 21 9.3 Cam arm (item No. 2) 22 9.4 Pin (item No. 3) 22 9.5 Ring (item No. 4) . 22 9.6 Main gasket (item No. 5) . 22 9.7 Thread gasket (item No. 6) . 22 10 Marking 23 11 Type testing and quality control . 23 Annex A (normative) Gauges for cam-locking couplings 24 A.1 Dimensions and d
13、esignation . 24 A.2 Material 25 Bibliography . 26 BS EN 14420-7:2013EN 14420-7:2013 (E) 3 Foreword This document (EN 14420-7:2013) has been prepared by Technical Committee CEN/TC 218 “Rubber and plastics hoses and hose assemblies”, the secretariat of which is held by BSI. This European Standard shal
14、l be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2014, and conflicting national standards shall be withdrawn at the latest by January 2014. Attention is drawn to the possibility that some of the elements of this docu
15、ment may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14420-7:2004+A1:2007. In comparison to EN 14420-7:2004+A1:2007, the following changes have been made: In Clause 1, the maximum allowab
16、le working pressure when using aluminium-cast-materials has been limited to 10 bar. In Clause 1, the warning paragraph has been deleted. In Clause 2, the normative references have been updated. A new Clause 3 “Terms and definitions“ has been added. The term “sealing ring“ has been replaced by “gaske
17、t“ (main gasket/thread gasket). In Table 3, the values for d2and d7have been corrected. In 8.3, requirements regarding the cam arm have been amended, e.g. the prevention against self-acting opening. In 9.2, the list of materials for coupler and adapter bodies has been revised. The requirements on ma
18、in gasket materials in 9.6 and thread gasket materials in 9.7 have been revised. In Clause 10, the requirements for marking have been amended. The Bibliography has been reviewed. The standard has been revised editorially. EN 14420, Hose fittings with clamp units consists of the following parts: Part
19、 1: Requirements, types of fixing and connection, designation and testing Part 2: Hose side parts of hose tail Part 3: Clamp units, bolted or pinned Part 4: Flange connections BS EN 14420-7:2013EN 14420-7:2013 (E) 4 Part 5: Threaded connections Part 6: TW tank truck couplings Part 7: Cam locking cou
20、plings Part 8: Symmetrical half coupling (Guillemin system) According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
21、 Finland, Former Yugoslav Republic of 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 14420-7:2013EN 14420-
22、7:2013 (E) 5 Introduction Cam locking couplings are manufactured worldwide according to the American “military specification“ MIL-C-27487. This American standard fixes the coupling side in a limited way, but not the connection side. Other parts like levers, bolts, ring and gaskets are not standardiz
23、ed. BS EN 14420-7:2013EN 14420-7:2013 (E) 6 1 Scope This European Standard specifies the design, materials, dimensions and marking requirements for cam locking couplings that serve as the link between hoses and connections to transport liquids, solids and gases, except liquid gas and steam. The coup
24、lings are capable of operating the pressure range 0,8 bar1)to 16 bar working pressure (for aluminium-cast-materials 0,8 bar to 10 bar) in a working temperature range of 20 C up to +65 C. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document
25、and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 755-2, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 2: Mechanical p
26、roperties EN 1706, Aluminium and aluminium alloys Castings Chemical composition and mechanical properties EN 1982, Copper and copper alloys Ingots and castings EN 10083-2, Steels for quenching and tempering Part 2: Technical delivery conditions for non alloy steels EN 10088-1, Stainless steels Part
27、1: List of stainless steels EN 10213, Steel castings for pressure purposes EN 10226-1, Pipe threads where pressure tight joints are made on the threads Part 1: Taper external threads and parallel internal threads Dimensions, tolerances and designation EN 12420, Copper and copper alloys Forgings EN 1
28、4420-1:2013, Hose fittings with clamp units Part 1: Requirements, types of fixing and connection, designation and testing EN 14420-2, Hose fittings with clamp units Part 2: Hose side parts of hose tail EN 14420-5, Hose fittings with clamp units Part 5: Threaded connections EN 22768-1, General tolera
29、nces Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1) EN 22768-2, General tolerances Part 2: Geometrical tolerances for features without individual tolerance indications (ISO 2768-2) EN ISO 228-1, Pipe threads where pressure-tight joints are
30、not made on the threads Part 1: Dimensions, tolerances and designation (ISO 228-1) EN ISO 8330:2008, Rubber and plastics hoses and hose assemblies Vocabulary (ISO 8330:2007) ISO 272, Fasteners Hexagon products Widths across flats 1) 1 bar = 0,1 MPa. BS EN 14420-7:2013EN 14420-7:2013 (E) 7 3 Terms an
31、d definitions For the purposes of this document, the terms and definitions given in EN ISO 8330:2008 and the following apply. 3.1 DN (nominal size) alphanumeric designation of size for components of a pipework system, which is used for reference purposes. It comprises the letters DN followed by a di
32、mensionless whole number which is indirectly related to the physical size, in millimetres, of the bore or outside diameter of the end connections. Note 1 to entry: The number following the letters DN does not represent a measurable value and should not be used for calculation purposes except where s
33、pecified in the relevant standard. Note 2 to entry: In those standards which use the DN designation system, any relationship between DN and component dimensions should be given, e.g. DN/OD or DN/ID. SOURCE: EN ISO 6708:1995, 2.1 3.2 PN alphanumeric designation used for reference purposes related to
34、a combination of mechanical and dimensional characteristics of a component of a hose fitting Note 1 to entry: It comprises the letters PN followed by a dimensionless number. Note 2 to entry: The number following the letters PN does not represent a measurable value and should not be used for calculat
35、ion purposes except where specified in the relevant standard. 3.3 main gasket interface gasket between the male and female part of a coupling 3.4 thread gasket flat faced gasket for threads according to EN ISO 228-1 4 Requirements 4.1 Construction The curves of the lever and the adapters as well as
36、the dimensions of the main gaskets shall be harmonised such that twisting of the hose and vibrating during operation shall not lead to leakage. Cam arms shall be manually operable. Cam arms shall be suitable to operate without using tools. For gauges for cam-locking couplings according to this Europ
37、ean Standard see Annex A. NOTE If the requirements of this European Standard are met, compatibility between couplers and adapters from different manufacturers is assured. Apart from gaskets, the interchangeability between spare parts from different manufacturers cannot be assured. 4.2 Temperatures R
38、ange of working temperatures of couplings equipped with nitrile butadiene rubber gasket (NBR-gasket): 20 C to +65 C. BS EN 14420-7:2013EN 14420-7:2013 (E) 8 5 Survey Figure 1 and Figure 2 show examples for cam-locking couplings. A parts list is given in Table 1. NOTE Chain optional. Figure 1 Coupler
39、 type DF and adapter type DP (dust plug) NOTE Chain optional. Figure 2 Coupler type DC and adapter type AF BS EN 14420-7:2013EN 14420-7:2013 (E) 9 Table 1 Parts list Item No. Number of pieces Nomination 1 a 1 body with internal thread for coupler 1 b 1 with external thread 1 c 1 with welding connect
40、ion 1 d 1 with hose nipple 1 e 1 cap 2 2 cam arms 3 2 pin 4 2 ring 5 1 main gasket 6 1 thread gasket for internal thread (see EN 14420-5) 7 1 At the discretion of the manufacturer a8 a 1 Adapter with internal thread 8 b 1 with external thread 8 c 1 with welding neck 8 d 1 with hose tail 8 e 1 plug 9
41、 4 ears aThe chain is not part of a complete coupling. BS EN 14420-7:2013EN 14420-7:2013 (E) 10 6 Types of connection The different types of connection of cam lock couplings are specified in Table 2. Table 2 Types of connection Coupler Adapter Figure Type For detail see Figure Type For detail see Ki
42、nd of connection DN Thread DF 8.2.1 AF 8.8.1 internal thread according to EN ISO 228-1 flat-faced with thread gasket according to EN 14420-5 20 25 32 40 50 65 80 100 G G 1 G 1 G 1 G 2 G 2 G 3 G 4 BF a8.2.2 FF a8.8.2 external thread according to EN 10226-1 20 25 32 40 50 65 80 100 R R 1 R 1 R 1 R 2 R
43、 2 R 3 R 4 DW 8.2.3 AW 8.8.3 welding connection 20 25 32 40 50 65 80 100 CC 8.2.4 EC 8.8.4 hose tail 20 25 32 40 50 65 80 100 DC 8.2.5 DP 8.8.5 dust cap, dust plug 20 25 32 40 50 65 80 100 aPrepared for flat face connections. BS EN 14420-7:2013EN 14420-7:2013 (E) 11 7 Designation Example for an orde
44、ring designation of a complete coupler with nominal size DN 20 with internal thread (DF) made of copper-zinc alloy (CW614N): Coupler EN 14420-7 20 DF CW614N Example for an ordering designation of a complete adapter with nominal size DN 20 with internal thread (AF) made of copper-zinc alloy (CW614N):
45、 Adapter EN 14420-7 20 AF CW614N Example for an ordering designation of the main gasket (item No. 5) with nominal size DN 20 made of nitrile butadiene rubber (NBR): Main gasket EN 14420-7 5 20 NBR 8 Dimensions 8.1 General Dimensions and their values are given in Figure 3 to Figure 16 and Table 3 to
46、Table 17. Dimensions in millimetres. General tolerances shall be according to EN 22768-1 and EN 22768-2. 8.2 Coupler types 8.2.1 Coupler type DF (item No. 1 a) Key 1 d6 - thread according to Table 2 Figure 3 Coupler type DF BS EN 14420-7:2013EN 14420-7:2013 (E) 12 Table 3 Coupler type DF Dimensions
47、in millimetres DN d1d2d3d4d5d7h1h2h3l1l3l4m1m2b1sa 0,1 min. 0,2 H8 2,00+ 0,2 02,0max. min. min. min. 10+max. min. 20 32,4 26,5 36 18 4 41 6,5 3 42,5 45 8 21 15,2 30,5 12 32 25 37,3 33,5 40,8 24 5,4 47 7,3 4 50 53 9,5 25 19 36 14 41 32 46 42,5 51 32 6,3 57 58,5 59 12 33 21,8 41,5 50 40 54 48,5 57 38
48、64 66 65 43 18 60 50 63,8 60,5 68 48 75 75,5 73 26,3 50 20 70 65 76,5 76,5 80,7 60 90 4,5 88,5 77,5 25,6 51 22 85 80 92,2 88,5 95,8 76 8 106 107,5 81 16 37 27,5 53 24 100 100 120,3 114,5 125,2 100 137 135,5 85,5 56 25 130 aThis width across flats according to ISO 272 shall be used. 8.2.2 Coupler typ
49、e BF (item No. 1 b) Table 4 Coupler type BF Dimensions in millimetres Nominal size DN d8l5al6thread according to EN 10226-1 min. min. 20 R 16 51 25 R 1 21 60 32 R 1 24 69 40 R 1 71 50 R 2 28 81 65 R 2 33 88 80 R 3 36 93 100 R 4 42 102 aIt may be agreed upon shorter external thread lengths for flat faced connections. In this case, the dimensions l5min. and l6min. are shortened appropriately. Figure 4 Coupler type BF For other dimens
