prEN ISO 14114

• Abstract:

  ISO 14114:2017 applies to acetylene cylinder manifold systems extending from the cylinder valve or the bundle outlet connections to the outlet connection of the main shut-off valve. It specifies requirements for design, materials and testing of cylinder manifold systems for the supply of acetylene for use in welding, cutting and allied processes.; ISO 14114:2017 applies to acetylene cylinder manifold systems in which acetylene single cylinders or acetylene bundles are coupled for collective gas withdrawal.; NOTE National regulations exist regarding limitation of the amount of single cylinders/bundles of acetylene on a single location (e.g. in warehouse or connected to a manifold system).; ISO 14114:2017 also covers a test procedure for decomposition blockers.

• Status: Not Published
• Publication Date: 20-Mar-2028
• ICS: 25.160.30 - Welding equipment
• Technical Committee: CEN/TC 121 - Welding
• Drafting Committee: CEN/TC 121/WG 19 - Equipment for gas welding, cutting and allied processes
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 27-Aug-2026
• Completion Date: 27-Aug-2026
• Ref Project: oSIST prEN ISO 14114:2026 - Gas welding equipment - Acetylene manifold systems for welding, cutting and allied processes - General requirements (ISO/DIS 14114:2026)

• Revises: EN ISO 14114:2018 - Gas welding equipment - Acetylene manifold systems for welding, cutting and allied processes - General requirements (ISO 14114:2017)
• Effective Date: 13-Nov-2024

Overview

prEN ISO 14114: Gas Welding Equipment - Acetylene Manifold Systems for Welding, Cutting and Allied Processes - General Requirements (ISO/DIS 14114:2026) is a draft European standard developed by CEN and ISO/TC 44/SC 8. This standard specifies the essential requirements for the design, materials, and testing of acetylene cylinder manifold systems, which supply acetylene gas for welding, cutting, and related industrial processes. It applies to systems that connect either single acetylene cylinders or bundles to a common manifold, ensuring collective and regulated gas withdrawal.

This standard is crucial for ensuring the safe and efficient operation of acetylene manifold systems in industrial environments, supporting both equipment manufacturers and end-users in maintaining high safety and performance standards.

Key Topics

prEN ISO 14114 covers several critical areas related to acetylene manifold systems:

• System Scope: The requirements apply from the cylinder or bundle connection to the main shut-off valve's outlet.
• Design Requirements:
  • High and low-pressure pipework and valves
  • Safety devices such as non-return valves, flame arrestors, and decomposition blockers
  • Pressure regulators and change-over units for multi-bank systems
• Materials of Construction: All components must be compatible and resistant to acetylene, acetone, DMF, and mechanical, chemical, or thermal stresses encountered in gas welding operations.
• Testing Procedures:
  • Strength and pressure tests for both high-pressure and low-pressure components
  • Gas tightness tests to verify system integrity
• Component Marking: Clear, permanent markings on each manifold system, including references to the standard, manufacturer, gas type, maximum pressure and flow, and installation date.
• Instructions for Use: Guidance for installation, commissioning, maintenance, safe operation, and troubleshooting.

Applications

The requirements specified in prEN ISO 14114 are widely applicable in various industries where acetylene is used as a fuel gas for:

• Welding and Metal Fabrication: Ensuring safe supply and withdrawal of acetylene in workshops, factories, and production lines.
• Cutting and Allied Processes: Supporting flame-cutting operations in construction, shipbuilding, and heavy machinery maintenance.
• Central Gas Supply Systems: Facilitating safe collective withdrawal and regulation of acetylene in industrial gas distribution systems.
• Safety and Compliance: Meeting the criteria for workplace safety and supporting compliance with national and international regulations regarding storage and use of acetylene cylinders and bundles.
• Warehouse and Plant Operations: Managing multiple gas sources efficiently with systems that prevent reverse flows, overpressure, and gas leaks.

Related Standards

prEN ISO 14114 references several other key standards that complement its requirements for acetylene manifold systems:

• ISO 5175 (all parts) - Gas welding equipment: Safety devices
• ISO 7291 - Pressure regulators for manifold systems up to 30 MPa
• ISO 9090 - Gas tightness of equipment for gas welding and allied processes
• ISO 9539 - Materials for equipment used in gas welding, cutting, and allied processes
• ISO 10961 - Gas cylinders: bundles, design, manufacture, testing, and inspection
• ISO 14113 - Rubber and plastics hose assemblies for industrial gases
• ISO 15296 - Gas welding equipment: Vocabulary
• ISO 15615 - Acetylene manifold systems: Safety requirements for high-pressure devices

These related standards provide additional guidance on component design, safety devices, materials selection, and testing procedures, forming a comprehensive framework for the safe construction and operation of acetylene manifold systems in gas welding equipment.

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Keywords: acetylene manifold systems, gas welding equipment, welding standards, safety devices, pressure testing, acetylene cylinder bundles, manifold design, industrial gas supply, ISO 14114.

SLOVENSKI STANDARD
01-oktober-2026
Oprema za plamensko varjenje - Baterije jeklenk z acetilenom za varjenje, rezanje
in sorodne postopke - Splošne zahteve (ISO/DIS 14114:2026)
Gas welding equipment - Acetylene manifold systems for welding, cutting and allied
processes - General requirements (ISO/DIS 14114:2026)
Gasschweißgeräte - Acetylenflaschen-Batterieanlagen für Schweißen, Schneiden und
verwandte Verfahren - Allgemeine Anforderungen (ISO/DIS 14114:2026)
Matériel de soudage aux gaz - Centrales de détente pour la distribution d'acétylène pour
le soudage, le coupage et les techniques connexes - Exigences générales (ISO/DIS
14114:2026)
Ta slovenski standard je istoveten z: prEN ISO 14114
ICS:
25.160.30 Varilna oprema Welding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 14114
ISO/TC 44/SC 8
Gas welding equipment — Acetylene
Secretariat: DIN
manifold systems for welding,
Voting begins on:
cutting and allied processes —
2026-08-28
General requirements
Voting terminates on:
2026-11-20
Matériel de soudage aux gaz — Centrales de détente pour
la distribution d'acétylène pour le soudage, le coupage et les
techniques connexes — Exigences générales
ICS: 25.160.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 14114:2026(en)
DRAFT
ISO/DIS 14114:2026(en)
International
Standard
ISO/DIS 14114
ISO/TC 44/SC 8
Gas welding equipment — Acetylene
Secretariat: DIN
manifold systems for welding,
Voting begins on:
cutting and allied processes —
General requirements
Voting terminates on:
Matériel de soudage aux gaz — Centrales de détente pour
la distribution d'acétylène pour le soudage, le coupage et les
techniques connexes — Exigences générales
ICS: 25.160.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 14114:2026(en)
ii
ISO/DIS 14114:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Design and materials . 4
4.1 Requirements for the manifold system and its components .4
4.2 Materials of construction .5
5 Tests . 5
5.1 Strength test .5
5.2 External gas tightness test .5
6 Marking . . 6
7 Instructions for use . . 6
Annex A (normative) Configurations of acetylene manifold systems. 7

iii
ISO/DIS 14114:2026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL:
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 8, Equipment for gas welding, cutting and allied processes.
This third edition cancels and replaces the second edition (ISO 14114:2014), which has been technically
revised with the following changes:
a) Clause 3 has been restructured;
b) 4.1 has been revised;
c) 5.3 has been revised;
d) Clause 6 has been revised;
e) Clause 7 has been revised;
f) Table A.1 has been revised;
g) Figures A.2 and A.4 have been revised and Figure A.5 has been deleted;
h) the title of Annex B has been modified.
Requests for official interpretations of any aspect of this document should be directed to the Secretariat
of ISO/TC 44/SC 8 via your national standards body. A complete listing of these bodies can be found at
www.iso.org.
iv
DRAFT International Standard ISO/DIS 14114:2026(en)
Gas welding equipment — Acetylene manifold systems
for welding, cutting and allied processes — General
requirements
1 Scope
This document applies to acetylene manifold systems extending from the cylinder valve or the bundle
outlet connections to the outlet connection of the main shut-off valve. It specifies requirements for design,
materials and testing of cylinder manifold systems for the supply of acetylene for use in welding, cutting and
allied processes.
This document applies to acetylene manifold systems in which one of the following acetylene sources is used
or connected for collective gas withdrawal:
— Single individual cylinder;
— Multiple cylinders;
— Single individual bundle;
— Multiple bundles,
When a single individual cylinder with cylinder regulator according to ISO 2503 is directly connected to the
cylinder valve, this document does not apply.
NOTE National regulations exist regarding limitation of the amount of single cylinders/bundles of acetylene on a
single location (e.g. in warehouse or connected to a manifold system).
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.
ISO 5175 (all parts), Gas welding equipment — Safety devices
ISO 7291:2010, Gas welding equipment — Pressure regulators for manifold systems used in welding, cutting and
allied processes up to 30 MPa (300 bar)
ISO 9090, Gas tightness of equipment for gas welding and allied processes
ISO 9539, Gas welding equipment — Materials for equipment used in gas welding, cutting and allied processes
ISO 10961, Gas cylinders — Cylinder bundles — Design, manufacture, testing and inspection
ISO 14113, Gas welding equipment — Rubber and plastics hose and hose assemblies for use with industrial gases
up to 450 bar (45 MPa)
ISO 15296, Gas welding equipment — Vocabulary
ISO 15615:2013, Gas welding equipment — Acetylene manifold systems for welding, cutting and allied processes
— Safety requirements in high-pressure devices

ISO/DIS 14114:2026(en)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 15296 and the following apply.
ISO and IEC maintain terminological 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
acetylene manifold systems
assembly of devices linking one or more gas sources coupled to a user pipeline system, delivering a regulated
pressure under specified safe conditions
Note 1 to entry: A manifold includes, for example, components like collectors, safety devices, and pressure regulators.
3.2
acetylene cylinder bundle
acetylene cylinder pack
assembly of cylinders fastened together, interconnected by a manifold for collective filling and gas
withdrawal, and intended to be transported as a single unit
3.3
manifold high pressure pipework
pipework system extending from the outlet connection of acetylene cylinders or bundles at full charging
pressure to the inlet of the pressure regulator, including as required hose assemblies or coiled metal pipes,
piping and high pressure valves
3.4
flame arrestor
device which extinguish
...