SIST EN ISO 10156:2018/A1:2026
(Amendment)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/Amd 1:2026)
- Status
- Not Published
- Public Enquiry End Date
- 01-May-2026
- Technical Committee
- TLP - Pressure vessels
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 15-Oct-2026
- Due Date
- 20-Dec-2026
SIST EN ISO 10156:2018/A1:2026 is Amendment 1 to ISO 10156:2017, published by SIST as the Slovenian adoption of the ISO amendment. It updates the method used to determine fire potential and oxidizing ability when selecting cylinder valve outlets for gases and gas mixtures. In practice, it is the document to use when a gas supplier, cylinder maker, or reviewer needs to apply the revised outlet-selection rule for the affected gas category.
What does SIST EN ISO 10156:2018/A1:2026 specify?
SIST EN ISO 10156:2018/A1:2026 specifies changes to the base standard ISO 10156:2017 for gas cylinders, gases and gas mixtures, and the selection of cylinder valve outlets based on fire potential and oxidizing ability. The amendment is focused and technical: it revises one entry in Clause 5.3.2, Table 4, and adds one bibliography reference.
| Part of the document | What it covers |
|---|---|
| Clause 5.3.2, Table 4 | Revision of the Ci coefficient entry for fluorine |
| Bibliography | Added reference on determining oxidizing ability of gases and gas mixtures |
The document is organized as an amendment to the underlying standard, so users apply it together with ISO 10156:2017. That matters because the amendment changes a specific coefficient used in the selection method rather than replacing the whole standard.
What are the key requirements of SIST EN ISO 10156:2018/A1:2026?
SIST EN ISO 10156:2018/A1:2026 changes the technical basis for classifying at least one gas used in the outlet-selection method. The practical effect is that anyone applying ISO 10156:2017 must use the updated Table 4 entry when handling fluorine.
Revised coefficient in Table 4
Clause 5.3.2, Table 4 is amended by changing the Ci coefficient for fluorine. In practice, this affects the classification step that supports choosing a suitable cylinder valve outlet, so users must make calculations and product decisions from the amended table rather than the previous one.
Updated bibliographic support
The Bibliography gains a report on determining oxidizing ability of gases and gas mixtures. This matters for engineers and technical reviewers because it points to background material linked to the assessment method used in the standard.
Apply the amendment with the base standard
SIST EN ISO 10156:2018/A1:2026 is not a complete standalone method. It changes a limited part of ISO 10156:2017, so users need the base standard to understand how the revised coefficient fits into the full outlet-selection process.
Impact on product and documentation control
For manufacturers and gas suppliers, the amendment means product classifications, valve outlet choices, and related technical files may need to be checked against the updated table entry. For quality and compliance teams, the key task is to verify that the current amendment is the one being used in internal specifications and customer documentation.
What terms does SIST EN ISO 10156:2018/A1:2026 define?
SIST EN ISO 10156:2018/A1:2026 uses a small set of technical terms that matter for outlet selection.
- Fire potential - the property assessed to judge how a gas or gas mixture may contribute to fire behavior when choosing a cylinder valve outlet.
- Oxidizing ability - the ability of a gas or gas mixture to promote combustion, which is part of the outlet-selection assessment.
- Cylinder valve outlets - the outlet connection on a cylinder valve that must match the gas category for safe use.
- Gas mixtures - combinations of gases assessed under the same outlet-selection method as single gases.
- Ci coefficient - the coefficient used in Table 4 as part of the classification method; this amendment updates the fluorine entry.
Who uses SIST EN ISO 10156:2018/A1:2026?
SIST EN ISO 10156:2018/A1:2026 is used by gas cylinder manufacturers, industrial gas suppliers, filling and distribution operations, and laboratories that classify gases for cylinder outlet selection. Quality managers and regulatory or conformity teams use it to check that the outlet chosen for a gas or gas mixture matches the hazard assessment in the standard. It is also relevant to engineers who maintain product specifications and technical files for gas cylinders.
What changed in SIST EN ISO 10156:2018/A1:2026 from the previous edition?
SIST EN ISO 10156:2018/A1:2026 is Amendment 1 to ISO 10156:2017. The amendment states two changes:
- Clause 5.3.2, Table 4 - the Ci coefficient entry for fluorine is revised.
- Bibliography - a report on determining oxidizing ability of gases and gas mixtures is added.
Which standards are used with SIST EN ISO 10156:2018/A1:2026?
SIST EN ISO 10156:2018/A1:2026 is used with ISO 10156:2017, which is the base standard it amends. The page also identifies the European parallel draft EN ISO 10156:2017/prA1, showing the same amendment in the parallel EN/ISO process.
What does the SIST EN ISO 10156:2018/A1:2026 document contain?
SIST EN ISO 10156:2018/A1:2026 is a short amendment document rather than a full standard. Its content centers on one technical correction in Clause 5.3.2, Table 4, and one added bibliography entry. The front matter identifies the document in Slovenian, English, German, and French, and the amendment text shows exactly where the base standard is updated. For users, the important part is that the document tells them what to change in the original method and where to look for supporting background.
Relations
- Effective Date
- 01-Dec-2026
Get Certified
Connect with accredited certification bodies for this standard
ECOCERT
Organic and sustainability certification.
Eurofins Food Testing Global
Global leader in food, environment, and pharmaceutical product testing.
Institut za varilstvo d.o.o. (Welding Institute)
Slovenia's leading welding institute since 1952. ISO 3834, EN 1090, pressure equipment certification, NDT personnel, welder qualification. Only IIW Au
Sponsored listings
Frequently Asked Questions
SIST EN ISO 10156:2018/A1:2026 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "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/Amd 1:2026)". This standard covers: 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/Amd 1:2026)
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/Amd 1:2026)
SIST EN ISO 10156:2018/A1:2026 is classified under the following ICS (International Classification for Standards) categories: 23.020.35 - Gas cylinders; 71.100.20 - Gases for industrial application. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 10156:2018/A1:2026 has the following relationships with other standards: It is inter standard links to SIST EN ISO 10156:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN ISO 10156:2018/A1:2026 is associated with the following European legislation: EU Directives/Regulations: 2008/68/EC; Standardization Mandates: M/TDG. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN ISO 10156:2018/A1:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 10156:2018/oprA1:2026
01-april-2026
Plinske jeklenke - Plini in zmesi plinov - Določanje stopnje vnetljivosti in
oksidativnosti za izbiro izhodnega priključka ventila za jeklenko - Dopolnilo A1
(ISO 10156:2017/DAM 1:2026)
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)
Gasflaschen - Gase und Gasgemische - Bestimmung der Brennbarkeit und des
Oxidationsvermögens zur Auswahl von Ventilausgängen - Änderung 1 (ISO
10156:2017/DAM 1:2026)
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 (ISO
10156:2017/DAM 1:2026)
Ta slovenski standard je istoveten z: EN ISO 10156:2017/prA1
ICS:
23.020.35 Plinske jeklenke Gas cylinders
71.100.20 Industrijski plini Gases for industrial
application
SIST EN ISO 10156:2018/oprA1:2026 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
SIST EN ISO 10156:2018/oprA1:2026
SIST EN ISO 10156:2018/oprA1:2026
DRAFT
Amendment
ISO 10156:2017/
DAM 1
ISO/TC 58/SC 2
Gas cylinders — Gases and gas
Secretariat: AFNOR
mixtures — Determination of fire
potential and oxidizing ability
Voting begins on:
2026-02-24
for the selection of cylinder valve
Voting terminates on:
outlets
2026-05-19
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
ICS: 23.020.35; 71.100.20
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 is circulated as received from the committee 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 10156:2017/DAM 1:2026(en)
SIST EN ISO 1
...