prEN ISO 10426-1
(Main)Oil and gas industries including lower carbon energy - Cements and materials for well cementing - Part 1: Specification (ISO/DIS 10426-1:2026)
General Information
- Abstract
ISO 10426-1:2009 specifies requirements and gives recommendations for six classes of well cements, including their chemical and physical requirements and procedures for physical testing.
ISO 10426-1:2009 is applicable to well cement classes A, B, C and D, which are the products obtained by grinding Portland cement clinker and, if needed, calcium sulfate as an interground additive. Processing additives can be used in the manufacture of cement of these classes. Suitable set-modifying agents can be interground or blended during manufacture of class D cement.
ISO 10426-1:2009 is also applicable to well cement classes G and H, which are the products obtained by grinding clinker with no additives other than one or more forms of calcium sulfate, water or chemical additives as required for chromium (VI) reduction.
- Status
- Not Published
- Publication Date
- 22-Nov-2027
- Current Stage
- 4060 - Closure of enquiry - Enquiry
- Start Date
- 21-Jul-2026
- Completion Date
- 21-Jul-2026
Overview
prEN ISO 10426-1:2026 is an international standard specifies the requirements for cements and materials used for well cementing in the oil and gas industries, including the growing sector of lower carbon energy. Developed under the auspices of CEN and aligned with ISO and API standards, this document provides rigorous specifications for well cement classes, including chemical and physical properties, and outlines testing procedures to ensure safety, quality, and performance during subsurface cementing operations.
This standard is crucial in supporting reliable, sustainable, and environmentally responsible practices for well construction, completion, and abandonment-key processes for both traditional fossil fuel and emerging low-carbon energy operations.
Key Topics
- Well Cement Classes: Covers specifications for eight well cement classes (A, B, C, D, G, H, K, and L) used in various subsurface environments and conditions.
- Classes A, B, C, D: Derived from grinding Portland cement clinker; may include additives for specific properties.
- Classes G, H: Produced by grinding clinker with calcium sulfate and minimal additional additives.
- Classes K, L: Composite cements manufactured with specified composite constituents, enhancing performance and sustainability.
- Chemical and Physical Requirements: Details on chemical composition, set modification, and strength development to meet operational demands.
- Testing Procedures: Defines standardized methods for physical testing of cement, ensuring repeatable and comparable results across the industry.
- Environmental Assessment: Introduces requirements for Global Warming Potential (GWP) assessment using verified Environmental Product Declarations (EPDs) and life cycle analysis as per ISO 14025, ISO 14040, ISO 14044, and EN 15804.
- Alignment with API Spec 10A: Supplements and updates to requirements from API Spec 10A, 25th edition, ensuring international harmonization.
Applications
The application of prEN ISO 10426-1:2026 supports critical operations in the oil and gas industry and extends to energy transition and lower carbon projects. Practical uses include:
- Well Construction and Integrity: Ensuring borehole structural integrity during drilling, completion, and abandonment phases for oil, gas, and geothermal wells.
- Material Selection: Provides guidance for engineers and procurement teams to select the most appropriate cements based on environmental, geological, and operational needs.
- Sustainability Assessment: Mandates EPDs for cements, facilitating transparency in environmental performance and supporting carbon reduction strategies.
- Quality Assurance: Standardizes testing and documentation so that well cement materials meet stringent safety and performance criteria worldwide.
Related Standards
Several standards intersect with prEN ISO 10426-1:2026, ensuring a comprehensive approach to well cementing and environmental responsibility:
- API Spec 10A, 25th Edition (2019): Reference specification for cements and materials in well cementing.
- ISO 14025: Requirements for Type III environmental product declarations.
- ISO 21930: Core rules for environmental product declarations in construction products and services.
- EN 15804: European standards for environmental product declarations in construction works.
- ISO 14040 / ISO 14044: Principles, framework, and requirements for life cycle assessment (LCA) of products.
By adhering to prEN ISO 10426-1:2026 and its referenced standards, the global energy sector ensures reliable, high-performance cementing while advancing sustainability and transparency in well construction practices. This is essential for managing operational risks, meeting regulatory requirements, and supporting the transition toward lower carbon energy solutions.
Relations
- Effective Date
- 25-Feb-2026
- Effective Date
- 25-Feb-2026
- Effective Date
- 25-Feb-2026
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Connect with accredited certification bodies for this standard
DIBt (Deutsches Institut für Bautechnik)
German Institute for Building Technology.
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DIN Group product certification.
Aboma Certification B.V.
Specialized in construction, metal, and transport sectors.
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Frequently Asked Questions
prEN ISO 10426-1 is a draft published by the European Committee for Standardization (CEN). Its full title is "Oil and gas industries including lower carbon energy - Cements and materials for well cementing - Part 1: Specification (ISO/DIS 10426-1:2026)". This standard covers: ISO 10426-1:2009 specifies requirements and gives recommendations for six classes of well cements, including their chemical and physical requirements and procedures for physical testing. ISO 10426-1:2009 is applicable to well cement classes A, B, C and D, which are the products obtained by grinding Portland cement clinker and, if needed, calcium sulfate as an interground additive. Processing additives can be used in the manufacture of cement of these classes. Suitable set-modifying agents can be interground or blended during manufacture of class D cement. ISO 10426-1:2009 is also applicable to well cement classes G and H, which are the products obtained by grinding clinker with no additives other than one or more forms of calcium sulfate, water or chemical additives as required for chromium (VI) reduction.
ISO 10426-1:2009 specifies requirements and gives recommendations for six classes of well cements, including their chemical and physical requirements and procedures for physical testing. ISO 10426-1:2009 is applicable to well cement classes A, B, C and D, which are the products obtained by grinding Portland cement clinker and, if needed, calcium sulfate as an interground additive. Processing additives can be used in the manufacture of cement of these classes. Suitable set-modifying agents can be interground or blended during manufacture of class D cement. ISO 10426-1:2009 is also applicable to well cement classes G and H, which are the products obtained by grinding clinker with no additives other than one or more forms of calcium sulfate, water or chemical additives as required for chromium (VI) reduction.
prEN ISO 10426-1 is classified under the following ICS (International Classification for Standards) categories: 91.100.10 - Cement. Gypsum. Lime. Mortar. The ICS classification helps identify the subject area and facilitates finding related standards.
prEN ISO 10426-1 has the following relationships with other standards: It is inter standard links to EN ISO 10426-1:2009/AC:2018, EN ISO 10426-1:2009, EN ISO 10426-1:2009/AC:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
prEN ISO 10426-1 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
01-julij-2026
Naftna in plinska industrija, vključno z nizkoogljično energijo - Cementi in materiali
za cementiranje vrtin - 1. del: Specifikacija (ISO/DIS 10426-1:2026)
Oil and gas industries including lower carbon energy - Cements and materials for well
cementing - Part 1: Specification (ISO/DIS 10426-1:2026)
Öl- und Gasindustrie einschließlich kohlenstoffarmer Energieträger - Zemente und
Materialien für die Zementation von Tiefbohrungen - Teil 1: Anforderungen (ISO/DIS
10426-1:2026)
Titre manque - Partie 1: Titre manque
Ta slovenski standard je istoveten z: prEN ISO 10426-1
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
91.100.10 Cement. Mavec. Apno. Malta Cement. Gypsum. Lime.
Mortar
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 10426-1
ISO/TC 67/SC 3
Oil and gas industries including
Secretariat: UNI
lower carbon energy — Cements
Voting begins on:
and materials for well cementing —
2026-04-28
Part 1:
Voting terminates on:
2026-07-21
Specification
ICS: 75.020; 91.100.10
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.
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BEING ACCEPTABLE FOR INDUSTRIAL,
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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 10426-1:2026(en)
DRAFT
ISO/DIS 10426-1:2026(en)
International
Standard
ISO/DIS 10426-1
ISO/TC 67/SC 3
Oil and gas industries including
Secretariat: UNI
lower carbon energy — Cements
Voting begins on:
and materials for well cementing —
Part 1:
Voting terminates on:
Specification
ICS: 75.020; 91.100.10
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,
© 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: +41 22 749 01 11
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 10426-1:2026(en)
ii
ISO/DIS 10426-1:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Supplements to API Spec 10A, 25th edition (2019) . 2
4.1 General requirements .2
4.2 Determining The Global Warming Potential (GWP) of Well Cements .2
iii
ISO/DIS 10426-1:2026(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,
...