1、BSI Standards PublicationBS EN 14420-8:2013+A1:2016BS EN 14420-8:2013Hose fittings with clamp units Part 8: Symmetrical half coupling (Guillemin system)BS EN 14420-8:2013+A1:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14420-8:2013+A1:2016. It supersedes
2、 BS EN 14420-8:2013 which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by .The UK participation in i
3、ts preparation was entrusted to Technical Committee PRI/66, Rubber and plastics tubing, hoses and hose assemblies.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract.
4、 Users are responsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016ISBN 978 0 580 88069 8ICS 23.040.70Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authori
5、ty of the Standards Policy and Strategy Committee on 31 July 2013.Amendments/corrigenda issued since publicationDate Text affected29 February 2016 Implementation of CEN amendment A1:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14420-8:2013+A1 February 2016 ICS 23.040.70 Supersedes EN 144
6、20-8:2013English Version Hose fittings with clamp units - Part 8: Symmetrical half coupling (Guillemin system) Raccords pour flexibles avec demi-coquille - Partie 8: Demi raccords symtriques (systme Guillemin) Schlaucharmaturen mit Klemmfassungen - Teil 8: Symmetrische Kupplungen (System Guillemin)
7、This European Standard was approved by CEN on 15 May 2013 and includes Amendment 1 approved by CEN on 7 December 2015. 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
8、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 European Standard exists in three official versions (English, French, German). A version in any other lang
9、uage 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 the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmar
10、k, Estonia, 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 andUnited Kingdom. EUROPEAN COMMITTEE FO
11、R STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14420-8:2013+A1:2016 EEN 14420-8:
12、2013+A1:2016 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 5 4 Requirements . 5 4.1 Pressures 5 4.2 Temperatures . 5 5 Components 5 6 Dimensions 6 7 Types of connections . 8 8 Designation. 10 9 Materials 10 9.1 General . 10 9.2 Coupling compon
13、ents . 10 9.3 Main gaskets: . 11 9.4 Thread gaskets: . 11 10 Marking 11 11 Type testing and quality control . 12 Annex A (normative) Gauge for symmetrical half couplings (Guillemin system) 13 A.1 General . 13 A.2 Dimensions, designation . 13 A.2.1 General . 13 A.2.2 Gauge A 13 A.2.3 Gauge B 15 A.3 M
14、aterial 16 Bibliography . 17 BS EN 14420-8:2013+A1:2016EN 14420-8:2013+A1:2016 (E) 3 European foreword This document (EN 14420-8:2013+A1:2016) 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 S
15、tandard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2016, 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
16、 this document 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 includes Amendment 1 approved by CEN on 2015-12-07. This document supersedes !EN 14420-8:2013“. The start and finish of text introduced or
17、 altered by amendment is indicated in the text by tags !“. !deleted text“ EN 14420, Hose fittings with clamp units consists of the following parts: Part 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
18、 Part 4: Flange connections Part 5: Threaded connections Part 6: TW tank truck couplings Part 7: Cam locking couplings Part 8: Symmetrical half coupling (Guillemin system) According to the CEN/CENELEC Internal Regulations, the national standards organizations of the fol-lowing countries are bound to
19、 implement this European Standard: 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, Ro
20、mania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 14420-8:2013+A1:2016EN 14420-8:2013+A1:2016 (E) 4 1 Scope This European Standard specifies dimensions, types of connections, quality of materials, marking re-quirements and testing requirements for hose fitti
21、ngs with symmetrical half couplings (Guillemin sys-tem), with mobile locking ring, for hose assemblies with a maximum working pressure of up to 10 bar1)with hose tails according to EN 14420-2 and clamp units according to EN 14420-3. Couplings in accord-ance with this document serve as link between h
22、oses and connections to transport liquids, solids (e.g. powders, granules) except steam and liquid gas. The working temperature range is 20 C up to +65 C. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are in-dispensable for its a
23、pplication. For dated references, only the edition cited applies. For undated refer-ences, the latest edition of the referenced document (including any amendments) applies. EN 573-3, Aluminium and aluminium alloys Chemical composition and form of wrought products Part 3: Chemical composition and for
24、m of products EN 1706, Aluminium and aluminium alloys Castings Chemical composition and mechanical proper-ties 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
25、Part 1: List of stainless steels EN 10213 Steel castings for pressure purposes EN 14420-1:2013, 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 14420-3, Hos
26、e fittings with clamp units Part 3: Clamp units, bolted or pinned EN 14420-4, Hose fittings with clamp units Part 4: Flange connections EN 14420-5, Hose fittings with clamp units Part 5: Threaded connections EN 22768-1, General tolerances Part 1: Tolerances for linear and angular dimensions without
27、individu-al tolerance indications (ISO 2768-1) EN 22768-2, General tolerances Part 2: Geometrical tolerances for features without individual toler-ance indications (ISO 2768-2) EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and desig
28、nation (ISO 228-1) 1)1 bar = 0,1 MPa. BS EN 14420-8:2013+A1:2016EN 14420-8:2013+A1:2016 (E) 5 EN ISO 8330:2008, Rubber and plastics hoses and hose assemblies Vocabulary (ISO 8330:2007) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 8330:2008 and
29、the follow-ing 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 dimensionless whole number which is indirectly related to the physical size, in millimetres, of the bore o
30、r 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 specified in the relevant standard. Note 2 to entry: In those standards which use the DN designation syst
31、em, 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 main gasket interface gasket between the male and female part of a coupling 3.3 thread gasket flat faced gasket for threads according to EN ISO 228-1 4 Requirements 4.1 Pr
32、essures Symmetrical half-couplings (Guillemin system), with mobile locking-ring, shall resist to the following pressures: a) Maximum working pressure = 16 bar !(see also EN 14420-1:2013, 4.3)“; b) Test pressure = 24 bar; c) Minimum burst pressure = 48 bar. NOTE 1 bar = 0,1 MPa. 4.2 Temperatures The
33、range of working temperatures of couplings equipped with nitrile butadiene rubber gasket (NBR-gasket) is 20 C to +65 C. 5 Components Figure 1 shows a coupling with hose tail (Type SGD) and a plug (Type SGB) as samples. BS EN 14420-8:2013+A1:2016EN 14420-8:2013+A1:2016 (E) 6 ! Key a hose tail b locki
34、ng ring c chain d gasket e retainer ring f body of plug Figure 1 Coupling with hose tail (Type SGD) and plug (Type SGB)“ 6 Dimensions General dimensions are given in Figure 2 and Table 1. Details which are not fixed shall be chosen by the manufacturer. For gauges see Annex A. BS EN 14420-8:2013+A1:2
35、016EN 14420-8:2013+A1:2016 (E) 7 Key a helix right pitch P b medial plan c according to EN 14420-4 *) K is measured in the plan bb NOTE For H and G see Table 1. Figure 2 General dimensions BS EN 14420-8:2013+A1:2016EN 14420-8:2013+A1:2016 (E) 8 Table 1 General dimensions Dimensions in millimetres No
36、minal size A C D E F G H K L O P R DN max. min. 20 19 10+32 31 38 36,5 14,5 14,5 10 0,1 8,7 0,1 23 6 2,5 25 23 20+37,5 36,5 44 42,5 15 15 10 0,1 8,7 0,1 27,25 6 3 32 27,5 5,20+42,5 41,5 50 48 15 15 11 0,1 9,7 0,1 32 6 3,5 40 38 20+55 54 63 61 19,5 19,5 14,5 0,1 13,4 0,1 43 8 4 50 48 20+69 68 78 76 2
37、4,5 24,5 18,5 0,1 17,4 0,1 54 8 4 65 62 30+84 83 94 92 24 24 17 0,15 16 0,15 69 10 5 80 78 20+103 101 114,5 111,5 28 28 20 0,15 19 0,15 85 10 5 100 97 30+123 121 136 133 30 30 21 0,15 20 0,15 103,5 10 6 7 Types of connections Types of connections are shown in Table 2. Dimensions for the main gasket
38、and the retainer ring are given in Table 3. BS EN 14420-8:2013+A1:2016EN 14420-8:2013+A1:2016 (E) 9 Table 2 Types of connections Dimensions in millimetres Figure Type Kind of connection Nominal size DN Thread according to EN ISO 228-1 SGD Hose tail 20 according to EN 14420-2 25 Hose tail to be conne
39、cted 32 with clamps units according to 40 EN 14420-3 50 65 80 Other dimensions see Clause 6 100 SGM External thread 20 G B according to EN 14420-5 25 G 1 B 32 G 1 B 40 G 1 B 50 G 2 B 65 G 2 B 80 G 3 B Other dimensions see Clause 6 100 G 4 B SGF Internal thread 20 G according to EN 14420-5 25 G 1 Fla
40、t-faced with thread gasket 32 G 1 40 G 1 50 G 2 65 G 2 80 G 3 Other dimensions see Clause 6 100 G 4 SGS Welding connections 20 To be agreed between 25 purchaser and manufacturer 32 40 50 65 Other dimensions see Clause 6 80 100 SGB Plug with chain and “S“ hook 20 length 300 mm (min.), capable 25 of s
41、upporting at least 10 times 32 the weight of the plug 40 50 65 Other dimensions see Clause 6 80 100 BS EN 14420-8:2013+A1:2016EN 14420-8:2013+A1:2016 (E) 10 Table 3 Dimensions for main gasket and retainer ring Main gasket DN O M N Retainer ring DN D d min. min. Other specifications see Clause 9 20 2
42、3 3,5 2,5 Other specifications see Clause 9 20 22 20/10 25 27,25 4 3,5 25 30 20/10 32 32 4,5 3 32 31 20/10 40 43 5 4 40 44 20/10 50 54 5 5 50 56 20/10 65 69 6 5 65 71 25/10 80 85 6 5,5 80 85 30/10 100 103,5 7 7 100 108 30/10 8 Designation Examples of ordering designations: EXAMPLE 1 Half-coupling wi
43、th hose tail and collar, nominal size DN 80 made of stainless steel (1.4404): Half coupling EN 14420-8 SGD 80 1.4404 EXAMPLE 2 Half-coupling with internal thread nominal size DN 50 made of aluminium alloy (EN AC-42100): Half coupling EN 14420-8 SGF 50 FFG2 EN AC-42100 9 Materials 9.1 General Whateve
44、r the kind of manufacturing procedure is, the minimum mechanical characteristics shall be equivalent to the mechanical characteristics of investment casting (in case of stainless steel) using the materials specified in this document. 9.2 Coupling components The quality of the materials constituting
45、the symmetrical half-couplings (Guillemin system) with mobile locking ring, gaskets, retainer rings and chains, shall conform to the chemical, mechanical and physical characteristics to provide the service conditions defined in Clause 4. The most commonly used materials are: a) Bronze CuSn5Zn5Pb5 ma
46、terial number CC491K according to EN 1982 b) Cast aluminium alloys EN AC Si7Mg0,3 material number EN AC-42100 according to EN 1706 EN AC SiMg0,6 material number EN AC-42200 according to EN 1706 According to the regulations of the manufacturers, these cast aluminium alloys shall undergo a heat treatm
47、ent. c) Wrought aluminium alloys BS EN 14420-8:2013+A1:2016EN 14420-8:2013+A1:2016 (E) 11 EN AW-Al Si1MgMn material number EN AW-6082 according to EN 573-3 d) Stainless steel X2CrNiMo 17-12-2 material number 1.4404 according to EN 10088-1 X5CrNiMo 17-12-2 material number 1.4401 according to EN 10088
48、-1 GX5CrNiMo19-11-2 material number 1.4408 according to EN 10213 9.3 Main gaskets: Materials shall be selected to be resistant to the fluid/product/liquid being conveyed. The materials shall be preferably selected from the following: a) Nitrile butadiene Rubber (NBR); b) Fluoro rubber (FPM); c) Poly
49、tetrafluorethylene (PTFE). Main gaskets shall be made from non-asbestos materials. 9.4 Thread gaskets: Materials shall be selected to be resistant to the fluid/product/liquid being conveyed. The materials shall be preferably selected from the following: a) Polyurethane (PUR); b) Polytetrafluoroethylene (PTFE); c) Nitrile butadiene rubber (NBR); d) Flu
