ISO 10156:2017/Amd 1

• Status: Not Published
• ICS: 23.020.35 - Gas cylinders
• ICS: 71.100.20 - Gases for industrial application
• Technical Committee: ISO/TC 58/SC 2 - Cylinder fittings
• Drafting Committee: ISO/TC 58/SC 2/WG 7 - Determination of properties of gases and gas mixtures
• Current Stage: 6000 - International Standard under publication
• Start Date: 11-Sep-2026
• Completion Date: 19-Sep-2026

• Consolidates: EN ISO 10156:2017/prA1 - Gas cylinders - Gases and gas mixtures - Determination of fire potential and oxidizing ability for the selection of cylinder valve outlets - Amendment 1 (ISO 10156:2017/DAM 1:2026)
• Effective Date: 12-Feb-2026
• Consolidates: ISO/PAS 5112:2022 - Road vehicles — Guidelines for auditing cybersecurity engineering
• Effective Date: 07-Jan-2025
• Amends: ISO 10156:2017 - Gas cylinders — Gases and gas mixtures — Determination of fire potential and oxidizing ability for the selection of cylinder valve outlets
• Effective Date: 19-Oct-2024

Overview

ISO 10156:2017/Amd 1 is an important amendment to the internationally recognized ISO 10156:2017 standard issued by the International Organization for Standardization (ISO). This amendment falls under the responsibility of ISO/TC 58/SC 2 and lends critical updates to the procedures and criteria for determining the fire potential and oxidizing ability of gases and gas mixtures. These determinations are essential for the selection of appropriate cylinder valve outlets in accordance with safety and regulatory requirements. The amendment enhances clarity and accuracy in the selection process for gas cylinder fittings in industrial, laboratory, and commercial applications.

Key Topics

• Fire Potential Assessment: ISO 10156:2017/Amd 1 updates the analytical methods used to evaluate the flammability of various industrial gases and gas mixtures. This is crucial for risk assessment and ensuring the safe storage, handling, and transportation of compressed gases.
• Oxidizing Ability Measurement: The amendment refines the criteria for assigning oxidizing properties to gases, impacting decisions around safe cylinder valve outlet selection.
• Table Updates: A significant technical correction is made to Table 4 in clause 5.3.2, specifically revising the "C coefficient" value for fluorine from "40" to "7.56". This adjustment ensures the correct hazard classification for fluorine gases.
• Reference Addition: The amendment adds a new reference for further reading on oxidizing ability determination, supporting users with more in-depth scientific background and context.

Applications

ISO 10156:2017/Amd 1 plays a vital role across multiple sectors where industrial gases and gas mixtures are managed:

• Gas Manufacturing: Assists manufacturers in determining correct cylinder valve outlet types based on fire and oxidizing properties, reducing the risk of improper connections and incidents.
• Laboratory Safety: Laboratories that use specialty gases rely on this standard to guide the selection of safe and compliant cylinder fittings, minimizing hazards during experimental procedures.
• Industrial Facilities: Plants and facilities storing or distributing gases must follow these guidelines to align with legal and safety regulations, ensuring protection of both personnel and infrastructure.
• Regulatory Compliance: By adhering to the latest standards, companies can demonstrate conformity with international best practices and regulatory requirements for gas cylinder safety.

Related Standards

For best practices and comprehensive safety management, ISO 10156:2017/Amd 1 should be used in context with related standards, including:

• ISO 10156:2017: The core standard for determination of flammability and oxidizing ability of gases and their mixtures.
• ISO 5145: Cylinder valve connections for gas cylinders - Selection and dimensions.
• ISO 11114 Series: Covers compatibility of cylinder and valve materials with gases.
• ISO/TC 58/SC 2 standards: Additional guidance and protocols on gas cylinders and their fittings.

By using ISO 10156:2017/Amd 1, stakeholders ensure safer gas handling and compliance with global industry standards, contributing to risk reduction, operational efficiency, and regulatory adherence in environments where gas cylinders are used or stored. For the most up-to-date and effective gas cylinder safety practices, it is recommended to reference the latest amendments and associated ISO standards.

International
Standard
ISO 10156
Fourth edition
Gas cylinders — Gases and gas
2017-07
mixtures — Determination of fire
potential and oxidizing ability
AMENDMENT 1
for the selection of cylinder valve
outlets
AMENDMENT 1
Bouteilles à gaz — Gaz et mélanges de gaz — Détermination
du potentiel d'inflammabilité et d'oxydation pour le choix des
raccords de sortie de robinets
AMENDEMENT 1
PROOF/ÉPREUVE
Reference number
ISO 10156:2017/Amd.1:2026(en) © ISO 2026

ISO 10156:2017/Amd.1:2026(en)
© ISO 2026
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
...

ISO 10156:2017/PRF Amd. 1:2026(en)
ISO/TC 58/SC 2
Secretariat: AFNOR
Date: 2026-07-30xx
Gas cylinders – — Gases and gas mixtures –— Determination of fire
potential and oxidizing ability for the selection of cylinder valve
outlets – Amendment
AMENDMENT 1
Bouteilles à gaz — Gaz et mélanges de gaz — Détermination du potentiel d'inflammabilité et d'oxydation pour
le choix des raccords de sortie de robinets
AMENDEMENT 1
PROOF
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
...