SIST EN 14423:2005
(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 document 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 bar (corresponding to a saturated steam temperature of 210 °C).
Schlaucharmaturen mit Klemmfassung für Dampf bis 18 bar
Diese Norm 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 a vapeur utilisant une pression jusqu'a 18 bar
La présente norme européenne prescrit les exigences applicables a la conception, aux matériaux et aux dimensions des raccords pour des accouplements de type a demi-coquille destinés a etre utilisés avec des flexibles pour vapeur et eau chaude de diametres nominaux DN 15 a DN 50. Elle couvre les raccordements utilisés a des pressions de service maximales allant jusqu'a 18 bar (correspondant a une température de vapeur saturée de 210 °C).
Cevne armature z objemkami za cevi za paro do 18 bar
General Information
Relations
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 a vapeur utilisant une pression jusqu'a 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 14423:2004SIST EN 14423:2005en01-marec-2005SIST EN 14423:2005SLOVENSKI
STANDARD
SIST EN 14423:2005
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14423November 2004ICS 23.040.70English versionClamp type coupling assemblies for use with steam hoses ratedfor pressures up to 18 barRaccords avec colliers de serrage pour tuyaux à vapeurutilisant une pression jusqu'à 18 barSchlaucharmaturen mit Klemmfassung für Dampf bis 18barThis European Standard was approved by CEN on 30 September 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14423:2004: ESIST EN 14423:2005
EN 14423:2004 (E) 2 Contents page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.5 4 General requirements.5 5 Survey on coupling assemblies and their designation.6 6 Hose dimensions.8 7 Design and dimensions.9 8 Bolts and nuts.19 9 Materials.19 10 Marking.21 11 Testing.22 12 Mounting of hose fittings.23 Bibliography.24
SIST EN 14423:2005
EN 14423:2004 (E) 3 Foreword This document (EN 14423:2004) 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 May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 14423:2005
EN 14423:2004 (E) 4 1 Scope This document 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 bar (corresponding to a saturated steam temperature of 210 °C). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 288-1, Specification and qualification of welding procedures for metallic materials — Part 1: General rules for fusion welding EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges EN 1982, Copper and copper alloys — Ingots and castings EN 10025, Hot rolled products of non-alloy structural steels — Technical delivery conditions 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 for general purposes EN 10204, Metallic products —Types of inspection documents EN 10213-4, Technical delivery conditions for steel castings for pressure purposes — Part 4: Austenitic and austenitic-ferritic steel grades 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 12420, Copper and copper alloys — Forgings EN 20898-2, Mechanical properties of fasteners — Nuts with specified proof load values — Coarse thread (ISO 898-2:1992) EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws and studs (ISO 898-1:1999) EN ISO 4042, Fasteners — Electroplated coatings (ISO 4042:1999) EN ISO 228-1:2003, Pipe threads where pressure tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) EN ISO 3506-1, Mechanical properties of corrosion-resistant stainless-steel fasteners — Part 1: Bolts, screws and studs (ISO 3506-1:1997) EN ISO 3506-2, Mechanical properties of corrosion-resistant stainless-steel fasteners — Part 2: Nuts (ISO 3506-2:1997) SIST EN 14423:2005
EN 14423:2004 (E) 5 EN ISO 4032, Hexagon nuts, style 1 — Product grades A and B (ISO 4032:1999) EN ISO 4762, Hexagon socket head cap screws (ISO 4762:2004) EN 22768-1:1989, General tolerances - Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1:1989) EN 22768-2:1989, General tolerances - Part 2:Geometrical tolerances for features without individual tolerance indications (ISO 2768-2:1989) ISO 2859-1:1999, 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 following terms and definitions apply. 3.1 DN see EN ISO 6708 3.2 s width across flats 3.3 ra see EN ISO 4287 4 General requirements Coupling assemblies in compliance with this document shall only be used with hoses rated for the service pressures and temperatures specified in Clause 1. 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, which have been put together appropriately, are tested in accordance with Clause 11, the hose shall burst before the coupling is dismantled or begins to leak. The bolts shall be adjustable so that the hose is prevented from slipping. Proof pressure 90 bar, burst pressure 180 bar at ambient temperature. SIST EN 14423:2005
EN 14423:2004 (E) 6 5 Survey on coupling assemblies and their designation 5.1 Survey
Key a Connector end b Tail end For 1 to 5 see Table 1 Figure 1 — Coupling assembly Table 1 — Coupling assembly components Item number Number Denomination 1 1 Tail end fitting 2 2 Clamp 3 4 Hexagon socket head cap screw 4 4 Hexagon nut 5 1 Connector
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 14423:2005
EN 14423:2004 (E) 7 Table 2 — Connectors, survey Illustration Type Description DN Thread size l1
≈≈≈≈ mm Details
FL PN 40 loose flange with weld-
neck collar as in EN 1092-1
See 7.3.1
FV PN 40 weld-neck flange as in EN 1092-1 15 20 25 (32)40 50
110 115 115 125 140 155 See 7.3.2
G Union nut with gasket, with parallel thread according to
EN ISO 228 a 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 10226-1 a 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 14423:2005
EN 14423:2004 (E) 8 5.2 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 The 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, shall read:
Coupling assembly EN 14423 — FL 20 — 1.4571 — 1.0038 — CW614N EXAMPLE 2 The 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 gasket, bolts and nuts, shall read:
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 ID, OD of the hose are within the limits and tolerances of the tails and clamps detailed in this document. Also that the materials for the couplings have been tested to withstand the temperature and pressure medium being conveyed. SIST EN 14423:2005
EN 14423:2004 (E) 9 7 Design and dimensions 7.1 General The dimensions of machined fittings shall be subject to the general tolerances of Class EN 22768-m. Tolerances for drop forged parts are to be agreed between the purchaser and manufacturer. Details left unspecified should be selected as appropriate. 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 have the dimensions given in Table 3. Their outer surface shall be formed by machining, the surface roughness Ra of 3,2 µm. Dimensions in millimetres
Key a Deburred b Ribs Figure 2 — Tail end fitting SIST EN 14423:2005
EN 14423:2004 (E) 10 Table 3 — Dimensions for tail end fittings Dimensions in millimetres d1 d2 d3 d4 d5 f1 k l2 l3 l4 l5 r1
Nominal size DN ±±±± 0,2 ±±±± 0,2 ±±±± 0,3 ±±±± 1,0 ±±±± 0,1 5,00+02,0−±±±± 1
Number or ribs
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 33 25 6 4 62
9 4
8 40
2 (32) 32
34 27 40 32 7 5 72
9 5
8 48
2 40 38
40,5 33 46 38 7 5 84 13 5 10 60
2,5 50 50
52,5 44 59 50 8 6 89 12 5 10 60
2,5 Avoid using DN 32
7.3 Connectors 7.3.1 Hose fittings with weld-neck collar (for loose flanges) (FL) The weld-neck collar may either be integral to the tail end fitting or welded to it (for welding requirements, see 7.3.3).
Type FL Key a Weld-neck collar PN 40 according to EN 1092-1 b Loose flange PN 40 according to EN 1092-1 c Tail end fitting (see 7.2) d Weld (optional, see 7.3.3) Figure 3 — Hose fitting with weld-neck collar SIST EN 14423:2005
EN 14423:2004 (E) 11 Table 4 — Maximum length of type FL and FV fittings Dimensions in millimetres Nominal size DN l6,
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