SIST EN 14423:2013
(Main)Clamp type coupling assemblies for use with steam hoses rated for pressures up to 18 bar
Clamp type coupling assemblies for use with steam hoses rated for pressures up to 18 bar
This European Standard specifies the design, materials and dimensions of fittings for clamp 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).
Schlaucharmaturen mit Klemmfassung für Dampf bis 18 bar
Dieses Dokument legt die Ausführung, Werkstoffe und Maße für Schlaucharmaturen mit Klemmfassung für Schläuche für Dampf und Heißwasser DN 15 bis DN 50 fest, die für Drücke bis 18 bar (entsprechend einer Sattdampftemperatur von 210 °C) ausgelegt sind.
Raccords avec colliers de serrage pour tuyaux à vapeur utilisant une pression jusqu'à 18 bar
Le présent document prescrit les exigences applicables à la conception, aux matériaux et aux dimensions des raccords pour des raccordements de type à demi-coquille destinés à être utilisés avec des flexibles pour vapeur et eau chaude de diamètres nominaux DN 15 à DN 50. Elle couvre les raccordements utilisés à des pressions de service maximales allant jusqu'à 18 bar (correspondant à une température de vapeur saturée de 210 °C).
Cevne armature z objemkami za cevi za paro do 18 bar
Ta evropski standard določa načrtovanje, materiale in dimenzije fitingov za cevne armature z objemkami za uporabo za cevi za paro in vročo vodo nominalnih velikosti od DN 15 do DN 50. Zajema armature do največjega delovnega tlaka 18 barov1) (ki ustreza temperaturi nasičene pare 210 °C).
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Cevne armature z objemkami za cevi za paro do 18 barSchlaucharmaturen mit Klemmfassung für Dampf bis 18 barRaccords avec colliers de serrage pour tuyaux à vapeur utilisant une pression jusqu'à 18 barClamp type coupling assemblies for use with steam hoses rated for pressures up to 18 bar23.040.70Gumene cevi in armatureHoses and hose assembliesICS:Ta slovenski standard je istoveten z:EN 14423:2013SIST EN 14423:2013en,fr,de01-september-2013SIST EN 14423:2013SLOVENSKI
STANDARDSIST EN 14423:2005/AC:2006SIST EN 14423:20051DGRPHãþD
SIST EN 14423:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14423
June 2013 ICS 23.040.70 Supersedes EN 14423:2004English Version
Clamp type coupling assemblies for use with steam hoses rated for pressures up to 18 bar
Raccords avec colliers de serrage pour tuyaux à vapeur utilisant une pression jusqu'à 18 bar
Schlaucharmaturen mit Klemmfassung für Dampf bis 18 bar This European Standard was approved by CEN on 8 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 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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR 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 14423:2013: ESIST EN 14423:2013
EN 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 assemblies .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 . 21 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 11.1 General . 24 11.2 Type-test . 24 11.3 Sampling . 24 12 Mounting of hose fittings . 24 Bibliography . 25
SIST EN 14423:2013
EN 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 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, at the latest by December 2013, and conflicting national standards shall be withdrawn at the latest by December 2013. 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 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 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. 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 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 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. SIST EN 14423:2013
EN 14423:2013 (E) 4 1 Scope This European Standard specifies the design, materials and dimensions of fittings for clamp 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 normatively 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: Technical 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 conditions 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 designation 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 steel 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 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 carbon 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. SIST EN 14423:2013
EN 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 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: Sampling 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 system, 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 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 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 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 the 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∫= [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. SIST EN 14423:2013
EN 14423:2013 (E) 6 3.4 main gasket interface gasket between the male and female part of a coupling 3.5 thread gasket 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 before 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 shown in Figure 1.
Key For 1 to 5 see Table 1 a Connector end b Tail end Figure 1 — Coupling assembly SIST EN 14423:2013
EN 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 screw 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 fitting and clamp) is fastened to a hose (see 7.2 and 7.4). SIST EN 14423:2013
EN 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 See 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 228-1a
15 20 25 32 40 50
G ½
G ¾
G 1
G 1¼
G 1½
G 2
80
80
80
90 105 115 See 7.3.4
GA Tapered male thread with external thread according to EN 10226-1a 15 20 25 32 40 50
R ½
R ¾
R 1
R 1¼
R 1½
R 2
95
95 100 110 125 140 See 7.3.5 a Other threads may be agreed between the purchaser and manufacturer.
SIST EN 14423:2013
EN 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— CW614N 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 flanges: (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, with 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 (CW614N) 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
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