Bsi bs en 14420 8 2013 + a1 2016

BSI Standards PublicationHose fittings with clamp units Part 8: Symmetrical half coupling Guillemin system... NORME EUROPÉENNE English Version Hose fittings with clamp units - Part 8: Sy

BSI Standards Publication

Hose fittings with clamp units

Part 8: Symmetrical half coupling (Guillemin system)

This British Standard is the UK implementation of

EN 14420-8:2013+A1:2016 It supersedes BS EN 14420-8:2013 which

is withdrawn.

The start and finish of text introduced or altered by amendment is indicated in the text by tags Tags indicating changes to CEN text carry the number of the CEN amendment For example, text altered by CEN amendment A1 is indicated by .

The UK participation in its preparation was entrusted to Technical Committee PRI/66, Rubber and plastics tubing, hoses and hose assemblies.

A list of organizations represented on this committee can be obtained

on request to its secretary.

This publication does not purport to include all the necessary provisions

of a contract Users are responsible for its correct application.

© The British Standards Institution 2016

Published by BSI Standards Limited 2016 ISBN 978 0 580 88069 8

Amendments/corrigenda issued since publication

29 February 2016 Implementation of CEN amendment A1:2016

NORME EUROPÉENNE

English Version

Hose fittings with clamp units - Part 8: Symmetrical half

coupling (Guillemin system) Raccords pour flexibles avec demi-coquille - Partie 8:

Demi raccords symétriques (système Guillemin) Schlaucharmaturen mit Klemmfassungen - Teil 8: Symmetrische Kupplungen (System Guillemin)

This European Standard was approved by CEN on 15 May 2013 and includes Amendment 1 approved by CEN on 7 December

2015

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

C OMITÉ E URO PÉEN DE N ORMA LI SA TIO N EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members Ref No EN 14420-8:2013+A1:2016 E

European foreword 3

1 Scope 4

2 Normative references 4

3 Terms and definitions 5

4 Requirements 5

4.1 Pressures 5

4.2 Temperatures 5

5 Components 5

6 Dimensions 6

7 Types of connections 8

8 Designation 10

9 Materials 10

9.1 General 10

9.2 Coupling components 10

9.3 Main gaskets: 11

9.4 Thread gaskets: 11

10 Marking 11

11 Type testing and quality control 12

Annex A (normative) Gauge for symmetrical half couplings (Guillemin system) 13

A.1 General 13

A.2 Dimensions, designation 13

A.2.1 General 13

A.2.2 Gauge A 13

A.2.3 Gauge B 15

A.3 Material 16

Bibliography 17

3

European foreword

This document (EN 14420-8:2013+A1:2016) 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 August 2016, and conflicting national standards shall

be withdrawn at the latest by August 2016

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 includes Amendment 1 approved by CEN on 2015-12-07

This document supersedes !EN 14420-8:2013"

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

!deleted text"

EN 14420, Hose fittings with clamp units consists of the following parts:

— Part 1: Requirements, types of fixing 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)

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the lowing 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

1 Scope

This European Standard specifies dimensions, types of connections, quality of materials, marking quirements and testing requirements for hose fittings with symmetrical half couplings (Guillemin sys-tem), with mobile locking ring, for hose assemblies with a maximum working pressure of up to 10 bar1)

re-with hose tails according to EN 14420-2 and clamp units according to EN 14420-3 Couplings in ance with this document serve as link between hoses and connections to transport liquids, solids (e.g powders, granules) except steam and liquid gas The working temperature range is –20 °C up to +65 °C

accord-2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are dispensable for its application For dated references, only the edition cited applies For undated refer-ences, the latest edition of the referenced document (including any amendments) applies

in-EN 573-3, Aluminium and aluminium alloys — Chemical composition and form of wrought products —

Part 3: Chemical composition and form of products

EN 1706, Aluminium and aluminium alloys — Castings — Chemical composition and mechanical

proper-ties

EN 1982, Copper and copper alloys — Ingots and castings

EN 10083-2, Steels for quenching and tempering — Part 2: Technical delivery conditions for non alloy

steels

EN 10088-1, Stainless steels — Part 1: List of stainless steels

EN 10213 Steel castings for pressure purposes

EN 14420-1:2013, Hose fittings with clamp units — Part 1: Requirements, types of fixing and connection,

designation and testing

EN 14420-2, Hose fittings with clamp units —Part 2: Hose side parts of hose tail

EN 14420-3, Hose 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 22768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without

individu-al tolerance indications (ISO 2768-1)

EN 22768-2, General tolerances — Part 2: Geometrical tolerances for features without individual

toler-ance indications (ISO 2768-2)

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)

1) 1 bar = 0,1 MPa

5

EN ISO 8330:2008, Rubber and plastics hoses and hose assemblies — Vocabulary (ISO 8330:2007)

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 8330:2008 and the ing apply

follow-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 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

a) Maximum working pressure = 16 bar !(see also EN 14420-1:2013, 4.3)";

c) Minimum burst pressure = 48 bar

NOTE 1 bar = 0,1 MPa

General dimensions are given in Figure 2 and Table 1

Details which are not fixed shall be chosen by the manufacturer

For gauges see Annex A

*) K is measured in the plan b—b

NOTE For H and G see Table 1

Figure 2 — General dimensions

DN

Thread according to

EN 14420-3 50

65

80 Other dimensions see Clause 6 100

SGM

External thread 20 G ¾ B according to EN 14420-5 25 G 1 B

SGF

Internal thread 20 G ¾ according to EN 14420-5 25 G 1 Flat-faced with thread gasket 32 G 1 ¼

40 G 1 ½

50 G 2

65 G 2 ½

80 G 3 Other dimensions see Clause 6 100 G 4

SGS

Welding connections 20

—

To be agreed between 25 purchaser and manufacturer 32

40

50

65 Other dimensions see Clause 6 80

100

SGB

Plug with chain and "S" hook 20

—

length 300 mm (min.), capable 25

of supporting at least 10 times 32 the weight of the plug 40

50

65 Other dimensions see Clause 6 80

100

Table 3 — Dimensions for main gasket and retainer ring

Examples of ordering designations:

EXAMPLE 1 Half-coupling with hose tail and collar, nominal size DN 80 made of stainless steel (1.4404):

Half coupling EN 14420-8 — SGD — 80 — 1.4404 EXAMPLE 2 Half-coupling with internal thread nominal size DN 50 made of aluminium alloy (EN AC-42100):

Half coupling EN 14420-8 — SGF — 50 — FFG2 — EN AC-42100

9 Materials

9.1 General

Whatever the kind of manufacturing procedure is, the minimum mechanical characteristics shall be equivalent to the mechanical characteristics of investment casting (in case of stainless steel) using the materials specified in this document

9.2 Coupling components

The quality of the materials constituting the symmetrical half-couplings (Guillemin system) with mobile locking ring, gaskets, retainer rings and chains, shall conform to the chemical, mechanical and physical characteristics to provide the service conditions defined in Clause 4

The most commonly used materials are:

a) Bronze

CuSn5Zn5Pb5 material number CC491K according to EN 1982

b) Cast aluminium alloys

EN AC Si7Mg0,3 material number EN AC-42100 according to EN 1706

EN AC SiMg0,6 material number EN AC-42200 according to EN 1706

According to the regulations of the manufacturers, these cast aluminium alloys shall undergo a heat treatment

c) Wrought aluminium alloys

11

EN AW-Al Si1MgMn material number EN AW-6082 according to EN 573-3

d) Stainless steel

X2CrNiMo 17-12-2 material number 1.4404 according to EN 10088-1

X5CrNiMo 17-12-2 material number 1.4401 according to EN 10088-1

GX5CrNiMo19-11-2 material number 1.4408 according to EN 10213

9.3 Main gaskets:

Materials shall be selected to be resistant to the fluid/product/liquid being conveyed

The materials shall be preferably selected from the following:

a) Nitrile butadiene Rubber (NBR);

b) Fluoro rubber (FPM);

c) Polytetrafluorethylene (PTFE)

Main gaskets shall be made from non-asbestos materials

9.4 Thread gaskets:

Materials shall be selected to be resistant to the fluid/product/liquid being conveyed

The materials shall be preferably selected from the following:

a) Polyurethane (PUR);

b) Polytetrafluoroethylene (PTFE);

c) Nitrile butadiene rubber (NBR);

d) Fluor rubber (FPM);

e) Ethylene propylene diene monomer (EPDM)

Thread gaskets shall be made from non-asbestos materials

10 Marking

If appropriate surface area is available, the body of each half-coupling shall be clearly and durably marked on the outside with the following information:

a) EN 14420-8;

b) manufacturer's name or trademark;

c) type and nominal size;

d) material number (at least for stainless steels)

11 Type testing and quality control

Type testing and quality control shall be done according to EN 14420-1:2013, Clause 7

The gauge in accordance to this document shall be used for checking:

a) the dimension between the bottom of the main gaskets groove and the median axis of the helicoidal ramps of jaws as well as the inside diameters of the jaws;

b) the dimension between the bottom of the main gaskets groove and the median axis of the helicoidal ramps of mobile locking ring as well as the outside diameter of the coupling

A.2 Dimensions, designation

A.2.1 General

An example for a gauge A is shown in Figure A.1, for a gauge B in Figure A.2 Only the dimensions given

in Table A.1 and Table A.2 shall be complied with

Details not specified in this document shall be chosen as appropriate

Tolerances shall be according to EN 22768-1 and EN 22768-2

Key

a helix pitch P

b X in centre of ramp

c maximal moving range of coupling

d minimal moving range of coupling

Figure A.1 — Gauge A

c maximal moving range of coupling

d minimal moving range of coupling

Figure A.2 — Gauge B

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