EN ISO 3821:2019

Gas welding equipment - Rubber hoses for welding, cutting and allied processes (ISO 3821:2019, Corrected version 2021-05)

This document specifies requirements for rubber hoses (including twin hoses) for welding, cutting and allied processes.
This document specifies requirements for rubber hoses for normal duty of 2 MPa (20 bar) and light duty [limited to hoses for maximum working pressure of 1 MPa (10 bar) and with bore up to and including 6,3 mm].
This document applies to hoses operated at temperatures −20 °C to +60 °C and used in:
—     gas welding and cutting;
—     arc welding under the protection of an inert or active gas;
—     processes allied to welding and cutting, in particular, heating, brazing, and metallization.
This document does not specify requirements for hose assemblies; these are detailed in ISO 8207.
This document applies neither to thermoplastics hoses nor to hoses used for high pressure [>0,15 MPa (>1,5 bar)] acetylene.

Gasschweißgeräte - Gummischläuche für Schweißen, Schneiden und verwandte Prozesse (ISO 3821:2019, korrigierte Fassung 2021-05)

Dieses Dokument legt Anforderungen für Gummischläuche (einschließlich Doppelschläuche) für Schweißen, Schneiden und verwandte Prozesse fest.
Dieses Dokument legt Anforderungen für Gummischläuche normaler Klasse bis zu 2 MPa (20 bar) und für Gummischläuche leichter Klasse fest (beschränkt auf Schläuche für einen höchsten Betriebsdruck von bis zu 1 MPa [10 bar] und mit einer Nennweite von kleiner oder gleich 6,3 mm).

Matériel de soudage aux gaz - Tuyaux souples en caoutchouc pour le soudage, le coupage et les techniques connexes (ISO 3821:2019, Version corrigée 2021-05)

Le présent document spécifie les exigences relatives aux tuyaux souples en caoutchouc (y compris les tuyaux jumelés) pour le soudage, le coupage et les techniques connexes.
Le présent document spécifie les exigences relatives aux tuyaux souples en caoutchouc pour le service normal jusqu'à 2 MPa (20 bar) et pour le service peu exigeant [limité aux tuyaux souples pour une pression de service maximale de 1 MPa (10 bar) et ayant un diamètre nominal inférieur ou égal à 6,3 mm].
Le présent document s'applique aux tuyaux utilisés à des températures de −20 °C à +60 °C pour:
—          le soudage et le coupage aux gaz;
—          le soudage à l'arc sous protection de gaz inerte ou actif;
—          les techniques connexes du soudage et du coupage, en particulier le chauffage, le brasage fort et la métallisation.
Le présent document ne s'applique pas aux assemblages de tuyaux souples qui sont détaillés dans l'ISO 8207.
Le présent document ne s'applique ni aux tuyaux souples en matière thermoplastique ni aux tuyaux souples utilisés en haute pression d'acétylène [> 0,15 MPa (> 1,5 bar)].

Oprema za plamensko varjenje - Gumene cevi za varjenje, rezanje in sorodne postopke (ISO 3821:2019)

Ta dokument določa zahteve za gumene cevi (vključno z dvojnimi cevmi) za varjenje, rezanje in sorodne postopke. Ta dokument določa zahteve za gumene cevi za normalno obremenitev, ki znaša 2 MPa (20 barov) in lahko obremenitev (omejeno za cevi z maksimalnim delovnim tlakom 1 MPa (10 barov) ter odprtino velikosti do vključno 6,3 mm). Ta dokument se uporablja za cevi, ki se uporabljajo pri temperaturah med –20 °C in 60 °C pri: – plinskem varjenju in rezanju; – obločnem varjenju pod zaščito z inertnim ali aktivnim plinom; – postopkih, povezanih z varjenjem in rezanjem, zlasti segrevanjem, spajkanjem in metalizacijo. Ta dokument ne določa zahtev za cevne priključke, ki so podrobno opisane v standardu ISO 8207. Ta dokument se ne uporablja niti za termoplastične cevi niti za cevi, ki se uporabljajo za acetilen pod visokim tlakom (> 0,15 MPa (> 1,5 bara)).

General Information

• Status: Published
• Publication Date: 24-Sep-2019
• Withdrawal Date: 30-Mar-2020
• ICS: 25.160.30 - Welding equipment
• ICS: 83.140.40 - Hoses
• Technical Committee: CEN/TC 121 - Welding
• Drafting Committee: CEN/TC 121/SC 7 - Equipment for gas welding, cutting and allied processes
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 25-Sep-2019
• Completion Date: 25-Sep-2019
• Ref Project: SIST EN ISO 3821:2020 - Gas welding equipment - Rubber hoses for welding, cutting and allied processes (ISO 3821:2019)

Relations

• Replaces: EN ISO 3821:2010 - Gas welding equipment - Rubber hoses for welding, cutting and allied processes (ISO 3821:2008)
• Effective Date: 04-Apr-2018

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2020
Nadomešča:
SIST EN ISO 3821:2011
Oprema za plamensko varjenje - Gumene cevi za varjenje, rezanje in sorodne
postopke (ISO 3821:2019)
Gas welding equipment - Rubber hoses for welding, cutting and allied processes (ISO
3821:2019)
Gasschweißgeräte - Gummischläuche für Schweißen, Schneiden und verwandte
Prozesse (ISO 3821:2019)
Matériel de soudage aux gaz - Tuyaux souples en caoutchouc pour le soudage, le
coupage et les techniques connexes (ISO 3821:2019)
Ta slovenski standard je istoveten z: EN ISO 3821:2019
ICS:
25.160.30 Varilna oprema Welding equipment
83.140.40 Gumene cevi Hoses
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3821
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2019
EUROPÄISCHE NORM
ICS 25.160.30; 83.140.40 Supersedes EN ISO 3821:2010
English Version
Gas welding equipment - Rubber hoses for welding, cutting
and allied processes (ISO 3821:2019)
Matériel de soudage aux gaz - Tuyaux souples en Gasschweißgeräte - Gummischläuche für Schweißen,
caoutchouc pour le soudage, le coupage et les Schneiden und verwandte Prozesse (ISO 3821:2019)
techniques connexes (ISO 3821:2019)
This European Standard was approved by CEN on 26 May 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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 ISO 3821:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3821:2019) has been prepared by Technical Committee ISO/TC 44 "Welding
and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding and allied
processes” the secretariat of which is held by DIN.
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 March 2020, and conflicting national standards shall
be withdrawn at the latest by March 2020.
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 supersedes EN ISO 3821:2010.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 3821:2019 has been approved by CEN as EN ISO 3821:2019 without any modification.

INTERNATIONAL ISO
STANDARD 3821
Fifth edition
2019-08
Gas welding equipment — Rubber
hoses for welding, cutting and allied
processes
Matériel de soudage aux gaz — Tuyaux souples en caoutchouc pour le
soudage, le coupage et les techniques connexes
Reference number
ISO 3821:2018(E)
©
ISO 2018
ISO 3821:2018(E)
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 3821:2018(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 2
5 Application . 2
6 Hose designation . 2
7 Materials . 3
7.1 Construction . 3
7.1.1 Light and normal duty hoses . 3
7.1.2 Flux fuel gas hose . 3
7.1.3 Twin hose . 3
7.2 Manufacture . 3
8 Dimensions and tolerances . 3
8.1 Inside diameters . 3
8.2 Outside diameters . 4
8.3 Wall thickness . 4
8.4 Concentricity (total indicator reading) . 5
8.5 Cut lengths and tolerances . 5
8.6 Disclosure of inside diameter and outside diameter . 5
9 Requirements and type tests . 5
9.1 General . 5
9.2 Basic requirements . 5
9.2.1 Tensile strength and elongation at break . 5
9.2.2 Accelerated ageing . 5
9.2.3 Adhesion . 5
9.2.4 Hydrostatic requirements . 6
9.2.5 Flexibility at ambient temperature . 6
9.2.6 Low-temperature flexibility . 6
9.2.7 Protection against incandescent particles and hot surfaces . 6
9.2.8 Ozone resistance . 6
9.3 Special requirements . 6
9.3.1 Non-ignition requirement for oxygen hoses . 6
9.3.2 Resistance to acetone and dimethylformamide for acetylene hoses . 7
9.3.3 Resistance to n-pentane for propane hoses . 7
9.3.4 Resistance to azeotrope of trimethylborate with methanol for flux fuel gas
hoses . 7
9.3.5 Flexibility of flux fuel gas hoses . 8
9.3.6 Permeability to LPG, MPS, and natural gas of methane hoses, universal
fuel gas hoses, and flux fuel gas hoses . 8
9.3.7 Requirements for twin hoses . 8
9.3.8 Requirements for universal fuel gas hose . 8
10 Hose colour and gas identification . 8
10.1 General . 8
10.2 Gas identification . 8
10.3 Marking . 9
Annex A (normative) Method of test for non-ignition .10
Annex B (normative) Method of test for resistance to n-pentane .12
Annex C (normative) Method of test for resistance to incandescent particles and hot surfaces .13
---------------------- P
...