BS EN 14420-1-2013 Hose fittings with clamp units Requirements types of fixing and connection designation and testing《带夹具组件的软管配件 要求 固定和连接类型 指定和试验》.pdf

1、BSI Standards PublicationBS EN 14420-1:2013Hose fittings with clamp unitsPart 1: Requirements, types of fixing andconnection, designation and testingBS EN 14420-1:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14420-1:2013.It supersedes BS EN 14420-1:2004

2、which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/66, Rubber and plastics tubing, hoses and hoseassemblies.A list of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 al

3、l the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 72880 8ICS 23.040.70Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Sta

4、ndard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2013.Amendments issued since publicationDate Text affectedBS EN 14420-1:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14420-1 July 2013 ICS 23.040.70 Supersedes EN 14420-1:2004+A1:2007English

5、Version Hose fittings with clamp units - Part 1: Requirements, types of fixing and connection, designation and testing Raccords pour flexibles avec demi-coquille - Partie 1: Exigences, types de fixation et connexion, dsignation et essais Schlaucharmaturen mit Klemmfassungen - Teil 1: Anforderungen,

6、Arten der Befestigung und Verbindung, Bezeichnung und Prfung This European Standard was approved by CEN on 15 May 2013. 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

7、 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 lan

8、guage 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, Denma

9、rk, 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 and United Kingdom. EUROPEAN COMMITTEE

10、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 reserved worldwide for CEN national Members. Ref. No. EN 14420-1:2013: EBS EN 14420-1:2013EN 14420-1

11、:2013 (E) 2 Contents Page Foreword 3 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Requirements .6 4.1 General 6 4.2 Resistance of the fitting materials to the medium .6 4.3 Permissible working pressures and temperatures 7 5 Types of fixing and connection 8 5.1 General 8 5.2 Types

12、of fixing on hose side 9 5.3 Types of connection . 10 6 Ordering designation system 15 7 Type testing and quality control . 16 7.1 General . 16 7.2 Type-test 16 7.3 Sampling 16 8 Mounting of hose fittings . 16 9 Marking 16 Bibliography . 17 BS EN 14420-1:2013EN 14420-1:2013 (E) 3 Foreword This docum

13、ent (EN 14420-1:2013) 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 shall be given the status of a national standard, either by publication of an identical text or by endorsement, a

14、t 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 document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying an

15、y or all such patent rights. This document supersedes EN 14420-1:2004+A1:2007. In comparison to EN 14420-1:2004+A1:2007, the following changes have been made: In Clause 1, a warning regarding operation has been added. In Clause 2, the normative references have been revised. Clause 3 “Terms and defin

16、itions“ has been revised. In 4.2, requirements for electrical conductivity of plastic coated hose assemblies has been inserted. In 4.3, permissible working pressures for aluminium cast fittings in EN 14420-7 and hose fittings according to EN 14420-8 have been specified. Clause 5 “Survey“ has been re

17、named “Types of fixing and connection“. Clause 7 “Type testing and quality control“ has been completely reviewed. The Bibliography has been revised. The standard has been revised editorially. EN 14420, Hose fittings with clamp units consists of the following parts: Part 1: Requirements, types of fix

18、ing and connection, designation and testing Part 2: Hose side parts of hose tail Part 3: Clamp units, bolted or pinned 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) BS EN 1442

19、0-1:2013EN 14420-1:2013 (E) 4 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, Finland, Former Yugoslav Repu

20、blic 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 14420-1:2013EN 14420-1:2013 (E) 5 1 Scope This Euro

21、pean Standard specifies requirements, types of fixing and connection, designation and testing for hose fittings with clamp units for hoses made of rubber/plastics or thermoplastics preferably for use with flammable and non-flammable products. It contains requirements for hose fittings to ensure that

22、, when used appropriately, the user or third persons are not exposed to hazards from fire, explosions or acid burns, for example from mineral oils or chemicals, and that the environment is protected from pollution and other detritus. For maximum working pressure (WP) and temperature see 4.3. WARNING

23、 Before decoupling of the quick coupling connections according to Parts 6, 7 and 8, the assembly should be at atmospheric pressure. 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 re

24、ferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10204, Metallic products Types of inspection documents EN 14420-2, Hose fittings with clamp units Part 2: Hose side parts of hose tail EN 14420-3, Ho

25、se 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 14420-6, Hose fittings with clamp units Part 6: TW tank truck couplings EN 14420-7, Hose

26、 fittings with clamp units Part 7: Cam locking couplings EN 14420-8, Hose fittings with clamp units Part 8: Symmetrical half coupling (Guillemin system) EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation (ISO 228-1) EN IS

27、O 8330:2008, Rubber and plastics hoses and hose assemblies Vocabulary (ISO 8330:2007) ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection 3 Terms and definitions For the purposes of this document, t

28、he 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 dimensionless whole number which is indirectly relat

29、ed 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 specified in the relevant standard. BS EN 14420-1:20

30、13EN 14420-1:2013 (E) 6 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 a combinati

31、on 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 calculation purpose

32、s except where specified in the relevant standard. 4 Requirements 4.1 General Hose fittings shall withstand the mechanical, thermal and chemical stresses and shall be impermeable and resistant to flammable and non-flammable water-polluting fluids and their vapours except liquid natural gas and vapou

33、r. Hose fittings shall be designed so that they comply with the requirements of this European Standard when attached correctly and establish a frictional and positive-locking tight connection on the hose. Hose fittings together with the hoses shall be mounted in such a manner, when specified in a ho

34、se product standard (e.g. EN 12115), that any electrostatic charging is safely led off. Hose assemblies shall be fastened or removed to exclude the risk of sparking in explosion-endangered zones. This can be avoided by choice of materials, such as stainless steel or copper-zinc alloys. Hose fittings

35、 shall be designed so that when using hoses the hose is destroyed first before being torn out from the fitting, if an overstress occurs. Only ductile metallic materials shall be used for hose fittings and hose clamps. Hose side fitting components shall not cause any dangerous notch or shear stresses

36、 on the hose. The clamp units shall be widened at the end in order to obtain a flexing zone and shall be approximately 10 % longer than the connection pieces to minimize shear stress to the hoses. If plastic coatings are provided it shall be assured by appropriate measures that the required electric

37、 conductivity of the hose assembly is maintained. Clamp units shall be attachable without special tools and be re-usable. Clamp units shall be replaced in sets. The type of connection and the material shall be selected in consideration of the potential hazard caused by the medium and in view of the

38、operating conditions. In this series of European Standards gaskets in hose fittings shall be made of non-asbestos materials. 4.2 Resistance of the fitting materials to the medium Consideration shall be given to the potential hazard caused by the medium and the operating conditions when selecting the

39、 type of connection. BS EN 14420-1:2013EN 14420-1:2013 (E) 7 In individual cases, other concentrations and additions to the medium as well as increase of temperature can reduce the resistance of the metallic materials. In these cases, details shall be agreed between purchaser and manufacturer. The f

40、itting components can be surface protected, e.g. nickel-plated, zinc-plated, chrome-plated or polymer coating. Details shall be agreed between purchaser and manufacturer. If plastic coating is intended, it shall be ensured by measures that the prescribed electrical conductivity of the hose assembly

41、is observed. The pairing of fittings from different material groups shall be avoided, if the presence of electrolytes is expected (contact corrosion). 4.3 Permissible working pressures and temperatures All hose fittings according to EN 14420-2, EN 14420-3, EN 14420-4 and EN 14420-5 shall be applicab

42、le to the working pressure range of 0,8 bar to 25 bar1). All hose fittings according to EN 14420-6 and EN 14420-7 shall be applicable to the working pressure range from -0,8 bar to 16 bar. Exceptions hereof are the aluminium cast fittings in EN 14420-7, whose maximum working pressure is limited to 1

43、0 bar. Only hose fittings according to EN 14420-8 having elongation values of more than 4 % are applicable to the working pressure range of 0,8 bar to 16 bar. Unless otherwise specified, a working temperature range of 20 C to +65 C shall apply. NOTE Permissible pressures and temperatures of hose ass

44、emblies are limited by the hoses and gaskets used. 1) 1 bar = 0,1 MPa. BS EN 14420-1:2013EN 14420-1:2013 (E) 8 5 Types of fixing and connection 5.1 General An example of a complete hose fitting with clamp unit is given in Figure 1. Key 1 connection side 2 hose side 3 connecting part shown here with

45、internal pipe thread 4 securing collar 5 hose side part of tail 6 clamp unit 7 hose Figure 1 Example of a complete hose fitting with clamp unit BS EN 14420-1:2013EN 14420-1:2013 (E) 9 5.2 Types of fixing on hose side Table 1 Types of fixing on hose side Type of fixing Type Nominal size Material grou

46、ps of fitting parts not in contact with the medium DN aClamp unit, bolted, according to EN 14420-3 K 15 Aluminium alloys, stainless steels, copper-zinc alloys 20 25 32 40 50 65 80 100 150 200 Clamp unit, pinned, according to EN 14420-3 S 25 Aluminium alloys, stainless steels 32 40 50 65 80 100 NOTE

47、For details see EN 14420-2 and EN 14420-3. aFor inside diameter of hoses see EN 14420-2. BS EN 14420-1:2013EN 14420-1:2013 (E) 10 5.3 Types of connection 5.3.1 Hose fittings with flange connection Table 2 Hose fittings with flange connection Connection type aType Nominal size Connection Material gro

48、ups of fitting parts in contact with the medium DN Loose flange FL 15 Dimensions of flange connection for PN 10 aNon-alloyed steels, stainless steels Hose fitting according to EN 14420-4 20 25 32 40 50 65 80 100 150 200 Fixed flange FV 15 Hose fitting according to EN 14420-4 20 25 32 40 50 65 80 100

49、 150 200 aFlange type to be agreed between manufacturer and purchaser (other types according to EN 1092-1 may be agreed). BS EN 14420-1:2013EN 14420-1:2013 (E) 11 5.3.2 Hose fittings with threaded connection Table 3 Hose fittings with threaded connection Connection type aType Nominal size Connection Material groups of fitting parts in contact with the medium DN Pipe thread according to EN ISO 228-1 with external thread GA 15 G A Aluminium alloys, non-alloyed steels, copper-zinc alloys, copper-tin alloys, st