Summary of pages
This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 17 and a back cover.

Amendments issued since publication
no record

English version
Hose fittings with clamp units
Part 5: Threaded connections

Raccords pour flexibles avec demi-coquille - Partie 5 : Raccordements filetés
Schlaucharmaturen mit Klemmfassungen - Teil 5: Gewindeanschlüsse

This 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 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 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 translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

©BSI 3 October 2005  /  ISBN 0 580 46626 4 / Ref. No. EN 14420-5:2004: E / November 2004 / ICS 23.040.70

Contents

Foreword
1        Scope
2        Normative references
3        Hose fitting with union nut and clamp fitting with male pipe thread
4        Dimensions, designations
4.1     General
4.2     Hose tail with male pipe thread
4.3     Hose tail with union nuts
4.4     Union nuts
4.5     Sealing rings
5        Surface finish
6        Materials
6.1     General
6.2     Hose tails and union nuts
6.3     Balls
6.4     Sealing rings
7        Marking
8        Type approval testing and quality control
Bibliography 

Foreword

This document (EN 14420—5:2004) 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of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005.

EN 14420 consists at the time of publication of the following parts:
EN 14420-1, Hose fittings with clamp units — Part 1: Requirements, survey, 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 14420-6, Hose fittings with clamp units — Part 6: TW tank truck couplings
EN 14420-7, Hose fittings with clamp units — Part 7: Cam locking couplings
EN 14420-8, Hose fittings with clamp units — Part 8: Symmetrical half coupling (Guillemin system)

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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.

1    Scope

This document specifies requirements for hose fittings with clamp units according to EN 14420-1 with union nut and pipe thread according to EN ISO 228-1 as well as for hose tails according to EN 14420-2 with male pipe thread according to EN ISO 228-1.

Maximum working pressure 25 bar, maximum working temperature 65 °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 1982, Copper and copper alloys — Ingots and castings
EN 10025, Hotrolled products of non-alloy structural steels — Technical delivery conditions
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 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 pressuretight joints are made on the threads — Part 1: Taper external threads and parallel internal threads — Dimensions, tolerances and designation
EN 10243-1, Steel die forgings — Tolerances on dimensions — Part 1: Drop and vertical press forgings
EN 10243-2, Steel die forgings — Tolerances on dimensions — Part 2: Upset forging made on horizontal forging machines
EN 10283, Corrosion resistant steel castings
EN 12164, Copper and copper alloys — Rod for free machining purposes
EN 12420, Copper and copper alloys — Forgings
EN 14420-1, Hose fittings with clamp units — Part 1: Requirements, survey, 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 ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation (ISO 228-1:2000)
EN ISO 683-17, Heat-treated steels, alloy steels and free-cutting steels — Part 17: Ball and roller bearing steels (ISO 683-17:1999)
EN ISO 4042, Fasteners — Electroplated coatings (ISO 4042:1999)
EN 22768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1:1989)
EN 22768-2, General tolerances — Part 2: Geometrical tolerances for features without individual tolerance indications (ISO 2768-2:1989)

3    Hose fitting with union nut and clamp fitting with male pipe thread

These hose fittings shall be in accordance with Figures 1 to 3 and Tables 1 and 2.

6    Materials

6.1    General

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

Other suitable materials may be agreed. If nothing else is agreed in the order, the choice of the above mentioned materials is at the option of the manufacturer.

6.2    Hose tails and union nuts

Hose tails and union nuts shall be made of the following materials:

—    Non-alloyed steels

        S235JRG2                                          material number 1.0038 according to EN 10025
        S355J0 (former St52-3U)                material number 1.0553 according to EN 10025
        S355J2G3 (former St52-3N)           material number 1.0570 according to EN 10025
        P 235T                                                 material number 1.0254 according to EN 10025
        11 SMnPb 30                                      material number 1.0718 according to EN 10087

—    Stainless steels

        X5CrNi18-10                                      material number 1.4301 according to EN 10088-1
        X5CrNiMo17-12-2                             material number 1.4401 according to EN 10088-1
        X2CrNiMo17-12-2                             material number 1.4404 according to EN 10088-1
        X6CrNiTi18-10                                   material number 1.4541 according to EN 10088-1
        X6CrNiMoTi17-12-2                          material number 1.4571 according to EN 10088-1
        GX5CrNiMo19-11-2                          material number 1.4408 according to EN 10213-4
        GX5CrNiMoNb19-11-2                     material number 1.4581 according to EN 10213-4
        GX5CrNiMo19-11-2                          material number 1.4408 according to EN 10283

—    Copper-zinc alloys

        Parts forged from extruded materials:
        CuZn39Pb3-H080                           material number CW614N according to EN 12420
        CuZn40Pb2-H080                           material number CW617N according to EN 12420
        GK-CuZn37Pb                                 material number CC754S according to EN 1982

        Parts made by turning:
        CuZn39Pb3                                      material number CW614N according to EN 12164
        CuZn40Pb2                                      material number CW617N according to EN 12164

—    Copper-tin alloy
        CuSn5Zn5Pb5                                 material number CC491 according to EN 1982

6.3    Balls

        Balls shall be made of the following material:
        X47Cr14                                            material number 1.3541 according to EN ISO 683-17

6.4    Sealing rings

The material of the seal rings shall be suitable for the fluid contained. It shall be agreed at the order.

Use non-asbestos materials for gaskets.

Bibliography

[1] EN 10027-1, Designation systems for steel — Part 1: Steel names, principal symbols
[2] EN ISO 8330, Rubber and plastics hoses and hose assemblies – Vocabulary (ISO 8330:1998)
[3] DIN 1687-3, Rough castings of heavy metal alloys — Gravity die castings, general tolerances, machining allowances