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 bar ) (corresponding to a saturated steam temperature of 210 °C).

Schlaucharmaturen mit Klemmfassung für Dampf bis 18 bar

Diese Europäische Norm legt die Ausführung, Werkstoffe und Maße für Schlaucharmaturen mit Klemmfassung für Schläuche für Dampf und Heißwasser mit Nennmaßen DN 15 bis DN 50 fest. Sie deckt die Armaturen für maximale Arbeitsdrücke von 18 bar1) ab (entsprechend einer Sattdampftemperatur von 210 °C).

Raccords avec colliers de serrage pour tuyaux à vapeur utilisant une pression jusqu'à 18 bar

La présente Norme européenne spécifie la conception, les matériaux et les dimensions des raccords pour des raccordements de type à demi-coquille destinés à être utilisés avec des tuyaux pour vapeur et eau chaude de dimensions nominales 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 (vključno z dopolnilom A2)

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 barov (ki ustreza temperaturi nasičene pare 210 °C).

General Information

Status
Published
Publication Date
07-May-2019
Current Stage
9060 - Closure of 2 Year Review Enquiry - Review Enquiry
Due Date
02-Dec-2021
Completion Date
02-Dec-2021

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SLOVENSKI STANDARD
SIST EN 14423:2013+A2:2019
01-julij-2019
Cevne armature z objemkami za cevi za paro do 18 bar (vključno z dopolnilom A2)

Clamp type coupling assemblies for use with steam hoses rated for pressures up to 18

bar
Schlaucharmaturen mit Klemmfassung für Dampf bis 18 bar

Raccords avec colliers de serrage pour tuyaux à vapeur utilisant une pression jusqu'à 18

bar
Ta slovenski standard je istoveten z: EN 14423:2013+A2:2019
ICS:
23.040.70 Gumene cevi in armature Hoses and hose assemblies
SIST EN 14423:2013+A2:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 14423:2013+A2:2019
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SIST EN 14423:2013+A2:2019
EN 14423:2013+A2
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2019
EUROPÄISCHE NORM
ICS 23.040.70 Supersedes EN 14423:2013+A1:2016
English 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 Schlaucharmaturen mit Klemmfassung für Dampf bis

utilisant une pression jusqu'à 18 bar 18 bar

This European Standard was approved by CEN on 13 June 2016 and includes Amendment 2 approved by CEN on 15 January

2019.

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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14423:2013+A2:2019 E

worldwide for CEN national Members.
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SIST EN 14423:2013+A2:2019
EN 14423:2013+A2:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 3

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 ...................................................................................................................... 8

6 Hose dimensions ............................................................................................................................................. 8

7 Design and dimensions ................................................................................................................................. 9

7.1 General ................................................................................................................................................................ 9

7.2 Tail end fittings ................................................................................................................................................ 9

7.3 Connectors ...................................................................................................................................................... 10

7.3.1 Hose fittings with weld-neck collar (for loose flanges) (FL) ........................................................ 10

7.3.2 Hose fittings with weld-neck flange (FV) ............................................................................................. 11

7.3.3 Welding connections ................................................................................................................................... 12

7.3.4 Hose fittings with union nut, thread according to EN ISO 228-1 ................................................. 12

7.3.5 Hose fittings with tapered male thread (R) ........................................................................................ 14

7.4 Clamps .............................................................................................................................................................. 15

8 Bolts and nuts ................................................................................................................................................ 18

9 Materials .......................................................................................................................................................... 18

9.1 Tail end fittings ............................................................................................................................................. 18

9.2 Weld-neck collars and flanges according to EN 1092-1 ................................................................. 19

9.3 Loose flanges according to EN 1092-1 .................................................................................................. 20

9.4 Union nuts ....................................................................................................................................................... 20

9.5 Wire ring ......................................................................................................................................................... 20

9.6 Gaskets ............................................................................................................................................................. 20

9.7 Clamps .............................................................................................................................................................. 21

9.8 Bolts and nuts ................................................................................................................................................ 21

10 Marking ............................................................................................................................................................ 21

10.1 Hose fittings ................................................................................................................................................... 21

10.2 Weld-neck collars and loose flanges ..................................................................................................... 21

10.3 Union nuts ....................................................................................................................................................... 22

10.4 Clamps .............................................................................................................................................................. 22

11 Type testing and quality control ............................................................................................................. 22

11.1 General ............................................................................................................................................................. 22

11.2 Type-test .......................................................................................................................................................... 22

11.3 Sampling .......................................................................................................................................................... 23

12 Mounting of hose fittings ........................................................................................................................... 23

Bibliography ................................................................................................................................................................. 24

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SIST EN 14423:2013+A2:2019
EN 14423:2013+A2:2019 (E)
European foreword

This document (EN 14423:2013+A2:2019) 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 November 2019, and conflicting national

standards shall be withdrawn at the latest by November 2019.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document includes Amendment 1, approved by CEN on 13 June 2016 and Amendment 2, approved

by CEN on 15 January 2019.
This document supersedes #EN 14423:2013+A1:2016$.

The start and finish of text introduced or altered by amendment is indicated in the text by tags !"

and #$.
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 organizations 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
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SIST EN 14423:2013+A2:2019
EN 14423:2013+A2:2019 (E)
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 bar (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.
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SIST EN 14423:2013+A2:2019
EN 14423:2013+A2:2019 (E)

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

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
arithmetic mean of the absolute ordinate values Z(x) within a sampling length:
Ra= Z(x)dx
[SOURCE: EN ISO 4287:1998 , 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.
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SIST EN 14423:2013+A2:2019
EN 14423:2013+A2:2019 (E)
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 !deleted text", 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
connector end
tail end
Figure 1 — Coupling assembly
Table 1 — List of coupling assembly components
Item Number of parts Denomination
number needed for one
assembly
1 1 Tail end fitting
2 2 Clamp
3 4 Hexagon socket head cap screw
4 4 Hexagon nut
5 1 Connector
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SIST EN 14423:2013+A2:2019
EN 14423:2013+A2:2019 (E)

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).

Table 2 — Types of connectors
Nominal
Thread Detail
size
Illustration Type Description
size s
PN 40 loose flange
See
FL with weld-neck collar
7.3.1
as in EN 1092–1
15 110
20 115
25 115
32 125
40 140
50 155
PN 40 weld-neck
See
FV flange as in EN 1092–
7.3.2
15 G ½ 80
Union nut with
20 G ¾ 80
thread gasket, with
25 G 1 80 See
parallel thread
32 G 1¼ 90 7.3.4
according to
40 G 1½ 105
EN ISO 228-1
50 G 2 115
15 R ½ 95
Tapered male thread
20 R ¾ 95
with external thread
25 R 1 100 See
!R"
according to
32 R 1¼ 110 7.3.5
40 R 1½ 125
EN 10226–1
50 R 2 140
Other threads may be agreed between the purchaser and manufacturer.
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SIST EN 14423:2013+A2:2019
EN 14423:2013+A2:2019 (E)
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
!R" Tapered stud end according to
EN 10226-1
DN (nominal size)
Materi
...

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