1、BSI Standards PublicationBS EN 14423:2013Clamp type couplingassemblies for use with steamhoses rated for pressures up to18 barBS EN 14423:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14423:2013. Itsupersedes BS EN 14423:2004 which is withdrawn.The UK par
2、ticipation 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 all the necessaryprovisions of
3、a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 72883 9ICS 23.040.70Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the
4、 authority of theStandards Policy and Strategy Committee on 31 July 2013.Amendments issued since publicationDate Text affectedBS EN 14423:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14423 June 2013 ICS 23.040.70 Supersedes EN 14423:2004English Version Clamp type coupling assemblies for
5、use with steam hoses rated for pressures up to 18 bar Raccords avec colliers de serrage pour tuyaux vapeur utilisant une pression jusqu 18 bar Schlaucharmaturen mit Klemmfassung fr Dampf bis 18 bar This European Standard was approved by CEN on 8 May 2013. CEN members are bound to comply with the CEN
6、/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 bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Cen
7、tre 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 of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as th
8、e official versions. CEN members are 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, Nether
9、lands, Norway, Poland, Portugal, Romania, 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 exploi
10、tation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14423:2013: EBS EN 14423:2013EN 14423:2013 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .5 4 General requirements 6 5 Design and designation of coupling assemblie
11、s .6 5.1 Design .6 5.2 Ordering designation system .9 6 Hose dimensions .9 7 Design and dimensions 9 7.1 General 9 7.2 Tail end fittings . 10 7.3 Connectors 10 7.4 Clamps . 17 8 Bolts and nuts . 20 9 Materials 20 9.1 Tail end fittings . 20 9.2 Weld-neck collars and flanges according to EN 1092-1 . 2
12、1 9.3 Loose flanges according to EN 1092-1 . 22 9.4 Union nuts . 22 9.5 Wire ring 22 9.6 Gaskets 22 9.7 Clamps . 22 9.8 Bolts and nuts . 23 10 Marking 23 10.1 Hose fittings 23 10.2 Weld-neck collars and loose flanges 23 10.3 Union nuts . 23 10.4 Clamps . 23 11 Type testing and quality control . 24 1
13、1.1 General . 24 11.2 Type-test 24 11.3 Sampling 24 12 Mounting of hose fittings . 24 Bibliography . 25 BS EN 14423:2013EN 14423:2013 (E) 3 Foreword This document (EN 14423:2013) has been prepared by Technical Committee CEN/TC 218 “Rubber and plastics hoses and hose assemblies”, the secretariat of w
14、hich 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, at the latest by December 2013, and conflicting national standards shall be withdrawn at the latest by December 2013. Attention is drawn to the
15、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 any or all such patent rights. This document supersedes EN 14423:2004. In comparison to EN 14423:2004, the following changes have been made: In
16、 Clause 2, the normative references have been updated. Clause 3 “Terms and definitions“ has been amended. The term “seals“ has been replaced by “gaskets“ (main gasket/thread gasket). Restrictions on nominal size DN 32 have been deleted. In 9.1, 9.2, 9.3 and 9.8, the material lists have been revised.
17、 In Clause 10, the requirements for marking of hose fittings and union nuts have been revised. Clause 11 “Type testing and quality control“ has been restructured and amended. The Bibliography has been reviewed. The standard has been revised editorially. According to the CEN-CENELEC Internal Regulati
18、ons, 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 Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy
19、, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 14423:2013EN 14423:2013 (E) 4 1 Scope This European Standard specifies the design, materials and dimensions of fittings for cla
20、mp type coupling assemblies for use with nominal sizes DN 15 to DN 50 steam and hot water hoses. It covers assemblies up to a maximum working pressure of 18 bar1)(corresponding to a saturated steam temperature of 210 C). 2 Normative references The following documents, in whole or in part, are normat
21、ively referenced in this document 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 10025-2, Hot rolled products of structural steels Part 2: Te
22、chnical delivery conditions for non-alloy structural steels EN 10087, Free-cutting steels Technical delivery conditions for semi-finished products, hot-rolled bars and rods EN 10088-1, Stainless steels Part 1: List of stainless steels EN 10088-2, Stainless steels Part 2: Technical delivery condition
23、s for sheet/plate and strip of corrosion resisting steels for general purposes 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 designati
24、on EN 10283, Corrosion resistant steel castings EN 12164, Copper and copper alloys Rod for free machining purposes EN 12168, Copper and copper alloys Hollow rod for free machining purposes EN 12420, Copper and copper alloys Forgings EN ISO 898-2, Mechanical properties of fasteners made of carbon ste
25、el and alloy steel Part 2: Nuts with specified property classes Coarse thread and fine pitch thread (ISO 898-2) EN 22768-1:1993, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1:1989) EN 22768-2:1993, General tolerances Part
26、 2: Geometrical tolerances for features without individual tolerance indications (ISO 2768-2:1989) 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 ISO 898-1, Mechanical properties of fasteners made of ca
27、rbon steel and alloy steel Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread (ISO 898-1) EN ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws and studs (ISO 3506-1) 1) 1 bar = 0,1 MPa. BS EN 1442
28、3:2013EN 14423:2013 (E) 5 EN ISO 3506-2, Mechanical properties of corrosion-resistant stainless steel fasteners Part 2: Nuts (ISO 3506-2) EN ISO 4032, Hexagon regular nuts (style 1) Product grades A and B (ISO 4032) EN ISO 4042, Fasteners Electroplated coatings (ISO 4042) EN ISO 4762, Hexagon socket
29、 head cap screws (ISO 4762) EN ISO 8330, Rubber and plastics hoses and hose assemblies Vocabulary (ISO 8330) EN ISO 15607, Specification and qualification of welding procedures for metallic materials General rules (ISO 15607) ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampl
30、ing schemes indexed by acceptable quality limit (AQL) for lot-by-lot inspection 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 8330 and the following apply. 3.1 DN (nominal size) alphanumeric designation of size for components of a pipework syste
31、m, which is used for reference purposes., which comprises the letters DN followed by a dimensionless 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 rep
32、resent 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 system, any relationship between DN and component dimensions should be given, e.g. DN/OD or DN/ID. SOURCE: EN IS
33、O 6708:1995, 2.1 3.2 PN alphanumeric designation which is used for reference purposes related to a combination of mechanical and dimensional characteristics of a component of a hose fitting and which comprises the letters PN followed by a dimensionless number Note 1 to entry: The number following th
34、e letters PN does not represent a measurable value and should not be used for calculation purposes except where specified in the relevant standard. 3.3 arithmetical mean deviation of the assessed profile Ra arithmetic mean of the absolute ordinate values Z(x) within a sampling length: xxZlrRalrd)(10
35、=SOURCE: EN ISO 4287:19982), 4.2.1 2) This document is currently impacted by the corrigendum EN ISO 4287:1998/AC:2008 and the draft amendment EN ISO 4287:1998/A1:2009. BS EN 14423:2013EN 14423:2013 (E) 6 3.4 main gasket interface gasket between the male and female part of a coupling 3.5 thread gaske
36、t flat faced gasket for threads according to EN ISO 228-1 4 General requirements When coupling assemblies, consisting of tail end fittings and clamps of the dimensions given in Table 8, as well as bolts and nuts as specified in Table 9, are tested in accordance with Clause 11, the hose shall burst b
37、efore the coupling is dismantled. The bolts shall be adjustable so that the hose is prevented from slipping. Proof pressure shall be at 90 bar; burst pressure shall be at 180 bar at ambient temperature. 5 Design and designation of coupling assemblies 5.1 Design A clamp type coupling assembly is show
38、n in Figure 1. Key For 1 to 5 see Table 1 aConnector end bTail end Figure 1 Coupling assembly BS EN 14423:2013EN 14423:2013 (E) 7 Table 1 List of coupling assembly components Item number Number of parts needed for one assembly Denomination 1 1 Tail end fitting 2 2 Clamp 3 4 Hexagon socket head cap s
39、crew 4 4 Hexagon nut 5 1 Connector NOTE A distinction is made between the connector end and the tail end of coupling assemblies. The former is the part by which the coupling is connected to an appliance or pipe (for various types of connectors, see Table 2), while the latter (including the tail end
40、fitting and clamp) is fastened to a hose (see 7.2 and 7.4). BS EN 14423:2013EN 14423:2013 (E) 8 Table 2 Types of connectors Illustration Type Description Nominal size DN Thread size l1 mm Details FL PN 40 loose flange with weld-neck collar as in EN 1092-1 15 20 25 32 40 50 110 115 115 125 140 155 Se
41、e 7.3.1 FV PN 40 weld-neck flange as in EN 1092-1 See 7.3.2 G Union nut with thread gasket, with parallel thread according to EN ISO 228-1a15 20 25 32 40 50 G G G 1 G 1 G 1 G 2 80 80 80 90 105 115 See 7.3.4 GA Tapered male thread with external thread according to EN 10226-1a15 20 25 32 40 50 R R R 1
42、 R 1 R 1 R 2 95 95 100 110 125 140 See 7.3.5 aOther threads may be agreed between the purchaser and manufacturer. BS EN 14423:2013EN 14423:2013 (E) 9 5.2 Ordering designation system Example for an ordering designation: Denomination Characteristics Coupling assembly EN 14423 FL 20 1.4571 1.0038 CW614
43、N EN number Type of connector FL Weld-neck collar for loose flange FV Weld-neck flange G Union nut with parallel thread according to EN ISO 228-1 GA Tapered stud end according to EN 10226-1 DN (nominal size) Material designation for tail end fittings: (according to 9.1) for type FL only: for loose f
44、langes: (according to 9.3) for clamps: (according to 9.7) EXAMPLE 1 Ordering designation for a type FL coupling assembly for use with DN 20 hoses, consisting of a stainless steel tail end fitting with collar (1.4571), a carbon steel (1.0038) loose flange and a wrought copper alloy (CW614N) clamp, wi
45、th bolts and nuts: Coupling assembly EN 14423 FL 20 1.4571 1.0038 CW614N EXAMPLE 2 Ordering designation for a type G coupling assembly for use with DN 20 hoses, consisting of a stainless steel tail end fitting, a carbon steel (1.0038) union nut secured by a wire ring, and a wrought copper alloy (CW6
46、14N) clamp, with thread gasket, bolts and nuts: Coupling assembly EN 14423 G 20 1.0038 CW614N 6 Hose dimensions Careful selection of the hose fittings should be made to ensure that the inner diameter (ID) and outer diameter (OD) of the hose are within the limits and tolerances of the tails and clamp
47、s detailed in this document. Also that the materials for the couplings have been tested to withstand the temperature and pressure medium being conveyed. 7 Design and dimensions 7.1 General The dimensions of machined fittings shall be subject to the general tolerances of Class EN 22768-m in EN 22768-
48、1:1993 and EN 22768-2:1993. BS EN 14423:2013EN 14423:2013 (E) 10 Tolerances for drop forged parts are to be agreed between the purchaser and manufacturer. The gasket material (see 9.6) is to be agreed between purchaser and supplier. 7.2 Tail end fittings The tail end fittings of hose couplings shall
49、 have the dimensions given in Table 3. Their outer surface shall be formed by machining, the surface roughness Ra of 3,2 m. Dimensions in millimetres aDeburred bRibs Figure 2 Tail end fitting Table 3 Dimensions for tail end fittings Dimensions in millimetres Nominal size DN d1d2d3d4d5f1k l2l3Number or ribs l4l5r1 0,2 0,2 0,3 1,0 0,1 5,00+02,0 1 15 13 15 9 20 13 6 4 62 9 4 8 40 2 20 19 21 14 26 19 6 4 62 9 4 8 40 2 25 25 27 20 3
