SIST EN 17931:2026

SLOVENSKI STANDARD
01-maj-2026
Oprema za plamensko varjenje - Ročna oprema za varjenje, segrevanje in rezanje -
Periodična kontrola
Gas welding equipment - Manual gas equipment for welding, heating and cutting -
Periodic inspection
Ausrüstung zum Gasschweißen - Handbetätigte Ausrüstung zum Schweißen, Erhitzen
und Schneiden - Regelmäßige Prüfung
Matériel de soudage au gaz - Matériel manuel au gaz pour le soudage, le chauffage et le
coupage - Inspection périodique
Ta slovenski standard je istoveten z: EN 17931:2026
ICS:
25.160.30 Varilna oprema Welding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17931
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2026
EUROPÄISCHE NORM
ICS 25.160.30
English Version
Gas welding equipment - Manual gas equipment for
welding, heating and cutting - Periodic inspection
Matériel de soudage au gaz - Matériel manuel au gaz Ausrüstung zum Gasschweißen - Handbetätigte
pour le soudage, le chauffage et le coupage - Inspection Ausrüstung zum Schweißen, Erhitzen und Schneiden -
périodique Regelmäßige Prüfung
This European Standard was approved by CEN on 19 January 2026.

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, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17931:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Single manual installation . 6
4.1 General . 6
4.2 Equipment . 8
4.3 Periodic inspection . 9
4.3.1 General . 9
4.3.2 Visual testing . 9
4.3.3 Leakage testing . 9
4.3.4 Flow rate testing . 9
4.4 Frequency of periodic inspection and replacement . 9
5 Inspection report . 14
Annex A (informative) Example of an inspection report . 15
Bibliography . 16

European foreword
This document (EN 17931:2026) has been prepared by Technical Committee CEN/TC 121 “Welding and
allied processes”, the secretariat of which is held by AFNOR.
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 September 2026, and conflicting national standards shall
be withdrawn at the latest by September 2026.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Türkiye and the United
Kingdom.
Introduction
Manual gas equipment for welding, cutting and allied processes is formed by various components that
enable the required features, including, for example, but not limited to: gas tightness, resistance to heat
and mechanical stress, adjustment of the gas flow and of the mixtures, etc.
The manufacturer provides guidelines on the type of maintenance and periodic checks to perform on the
equipment. However, the rate of use and the conditions to which this equipment is subjected are
extremely variable.
This document is meant to help the employer and the workers define the maintenance activities that are
suitable for a safe use of the equipment, in accordance with current legislation.
1 Scope
This document specifies guidelines for periodic inspections of gas equipment for welding, cutting and
allied processes placed downstream of the gas cylinder’s valve as shown in Figure 1 or, in the case of
centralized distribution, downstream from the tapping point, since commissioning.
NOTE In some cases, gas cylinders can be replaced by cylinder bundles. Acetylene cylinder bundle systems
upstream of the tapping point are excluded.
This document applies to gas welding equipment intended for professional use which utilizes
compressed gases up to 300 bar (30 MPa), acetylene, liquefied petroleum gas (LPG), methylacetylene-
propadiene mixtures (MPS) and carbon dioxide (CO ) and related mixtures.
This document does not apply to automatic applications of gas welding, cutting and allied processes.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 560, Gas welding equipment — Hose connections for equipment for welding, cutting and allied processes
EN 561, Gas welding equipment — Quick-action coupling with shut-off valves for welding, cutting and allied
processes
EN 1256, Gas welding equipment — Specification for hose assemblies for equipment for welding, cutting
and allied processes
EN 1327, Gas welding equipment — Thermoplastic hoses for welding and allied processes
EN 13018, Non-destructive testing — Visual testing — General principles
EN ISO 2503, Gas welding equipment — Pressure regulators and pressure regulators with flow-metering
devices for gas cylinders used in welding, cutting and allied processes up to 300 bar (30 MPa) (ISO 2503)
EN ISO 3821, Gas welding equipment — Rubber hoses for welding, cutting and allied processes (ISO 3821)
EN ISO 5172, Gas welding equipment — Blowpipes for gas welding, heating and cutting - Specifications and
tests (ISO 5172)
EN ISO 5175-1, Gas welding equipment — Safety devices — Part 1: Devices incorporating a flame
(flashback) arrestor (ISO 5175-1)
EN ISO 5175-2, Gas welding equipment — Safety devices — Part 2: Devices not incorporating a flame
(flashback) arrestor (ISO 5175-2)
EN ISO 7291, Gas welding equipment — Pressure regulators for manifold systems used in welding, cutting
and allied processes up to 30 MPa (300 bar) (ISO 7291)
EN ISO 9012, Gas welding equipment — Air-aspirated hand blowpipes — Specifications and tests
(ISO 9012)
EN ISO 9090, Gas tightness of equipment for gas welding and allied processes (ISO 9090)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 560, EN 561, EN 1256,
EN 13018, EN ISO 2503, EN ISO 3821, EN ISO 5172, EN ISO 5175-1, EN ISO 5175-2, EN ISO 7291,
EN ISO 9012 and EN ISO 9090 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
gas equipment
equipment, accessory, or device that contributes to creating an installation that uses gas (for example, for
the purpose of combustion or gas protection) in welding, cutting or allied processes
3.2
commissioning
all the operations needed to get gas equipment up and running (for example, replacing the cylinder or
the connection between components)
3.3
single manual installation
work area which has all the manual gas equipment intended for a single installation to perform welding,
cutting or allied processes by using gas (for example, for the purpose of combustion or gas protection)
3.4
complete inspection
all the operations needed in accordance with the manufacturers’ specification to make the equipment
suitable for further use until its next complete inspection or its replacement
Note 1 to entry: Such operations, if allowed by the manufacturer, can generally include:
— complete or partial dismantling of the equipment;
— replacement of the components that are subject to wear and tear and deterioration through use with original
spare parts;
— reassembling and commissioning.
4 Single manual installation
4.1 General
A single manual gas installation generally consists of:
— for oxy-fuel gas processes generally two cylinders, one containing oxygen and one containing a
combustible gas (such as acetylene) fitted with shut-off valves;
— for air-fuel gas processes generally one cylinder, containing a combustible gas (such as LPG) fitted
with shut-off valves;
— for shielding gas processes or other allied processes generally one cylinder containing appropriate
gas or mixture;
— a pressure regulator for each cylinder;
— quick-action couplings with shut-off valves (optional);
— hoses;
— connectors to join different components;
— safety devices, e.g.:
• for oxy -fuel application: flame arrestors and non-return valves in accordance with
EN ISO 5175-1;
• for Air -LPG application: also excess -flow cut off valves in accordance with EN ISO 5175-2 or
appropriate safety function;
— process devices.
Examples of single manual gas installations, such as oxy-fuel or gas
...