SIST EN 751-1:1997
(Main)Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 1: Anaerobic jointing compounds
General Information
- Abstract
This European Standard specifies requirements and test methods for anaerobic jointing compounds (hereafter referred to as "jointing compounds") suitable for sealing threaded metallic joints such as those specified in ISO 7-1. These jointing compounds are for use in contact with 1st family gases (town gas), 2nd family gases (natural gas) and 3rd family gases (liquefied petroleum gases (LPG) not including LPG in the liquid form) and hot water of heating systems. [The scope of the complete standard includes a table.]
- Status
- Published
- Publication Date
- 31-Jul-1997
- Technical Committee
- PLN - Gas appliances for domestic use
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Aug-1997
- Due Date
- 01-Aug-1997
- Completion Date
- 01-Aug-1997
- Directive
- 2009/142/EC - Appliances burning gaseous fuelsOJ Ref: C 349 OJ Date: 22-Dec-2010
90/396/EEC - Appliances burning gaseous fuelsOJ Ref: C 216 OJ Date: 17-Jul-1997
Overview
EN 751-1:1996 is a CEN European Standard that specifies requirements and test methods for anaerobic jointing compounds used as sealing materials for metallic threaded joints (e.g., threads per ISO 7-1). The standard covers anaerobic sealants intended for use in contact with 1st family gases (town gas), 2nd family gases (natural gas), 3rd family gases (LPG, excluding LPG in liquid form) and hot water in heating systems. EN 751-1 is intended to ensure safe, reliable sealing performance of anaerobic compounds in gas and hot-water pipework.
Key Topics
- Scope and application: Defines the intended uses for anaerobic jointing compounds on metallic threaded joints in gas supply and heating systems.
- Performance requirements: Sets out the types of requirements the jointing compounds must meet to be considered suitable (sealing integrity, compatibility with thread dimensions such as ISO 7-1, and suitability for the specified gas families and hot water).
- Test methods: Specifies test procedures to evaluate product performance and compliance - for example, tests addressing leak-tightness and interaction with gas and hot-water environments (standard describes required test methods rather than proprietary lab techniques).
- Marking and documentation: Requirements for product identification, manufacturer information and declaration of suitability for use with specified gas families and hot water.
- Safety and conformity: Guidance for manufacturers and conformity assessment to support safe installation and regulatory compliance.
Applications
EN 751-1 is a practical reference for:
- Sealant manufacturers designing and validating anaerobic jointing compounds for gas and heating systems.
- Plumbing and gas installers selecting approved sealants for metallic threaded joints in domestic and commercial heating and gas distribution.
- System designers and specifiers who need to reference a recognized standard when specifying materials for pipelines and equipment.
- Testing laboratories and conformity assessors performing compliance tests against European requirements.
- Regulatory bodies and procurement teams requiring demonstrable compliance for safety and performance in gas supply and water heating installations.
Related Standards
- ISO 7-1 (threads for pressure-tight joints on threaded pipes) - referenced thread specification.
- Other parts of EN 751 (other sealing material types and test methods) and national adoptions (e.g., SIST EN 751-1) may provide complementary requirements for different sealing technologies.
- ICS categories: 83.140.50 (Seals), 91.140.40 (Gas supply systems), 91.140.60 (Water supply systems).
Keywords: EN 751-1, anaerobic jointing compounds, threaded metallic joints, sealing materials, gas supply systems, ISO 7-1, LPG, hot water, heating systems.
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Referred By
SIST EN 30-1-1:2009+A2:2011 - Domestic cooking appliances burning gas - Part 1-1: Safety - General - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Referred By
SIST EN 203-1:2022+A1:2024 - Gas heated catering equipment - Part 1: General safety requirements - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
SIST EN 751-1:1997 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 1: Anaerobic jointing compounds". This standard covers: This European Standard specifies requirements and test methods for anaerobic jointing compounds (hereafter referred to as "jointing compounds") suitable for sealing threaded metallic joints such as those specified in ISO 7-1. These jointing compounds are for use in contact with 1st family gases (town gas), 2nd family gases (natural gas) and 3rd family gases (liquefied petroleum gases (LPG) not including LPG in the liquid form) and hot water of heating systems. [The scope of the complete standard includes a table.]
This European Standard specifies requirements and test methods for anaerobic jointing compounds (hereafter referred to as "jointing compounds") suitable for sealing threaded metallic joints such as those specified in ISO 7-1. These jointing compounds are for use in contact with 1st family gases (town gas), 2nd family gases (natural gas) and 3rd family gases (liquefied petroleum gases (LPG) not including LPG in the liquid form) and hot water of heating systems. [The scope of the complete standard includes a table.]
SIST EN 751-1:1997 is classified under the following ICS (International Classification for Standards) categories: 83.140.50 - Seals; 91.140.40 - Gas supply systems; 91.140.60 - Water supply systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 751-1:1997 has the following relationships with other standards: It is inter standard links to SIST EN 14071:2015+A1:2019, SIST EN 15001-1:2023, SIST EN 16125:2016, SIST EN 14829:2008, SIST EN 30-1-1:2009+A2:2011, SIST EN 12007-5:2025, SIST EN 14071:2005, SIST EN 14543:2005+A1:2008, SIST EN 203-1:2022+A1:2024, SIST EN 16631:2025, SIST EN 14071:2015, SIST EN 746-2:2010, SIST EN 13175:2015, SIST EN 13175:2019, SIST EN 13090:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 751-1:1997 is associated with the following European legislation: EU Directives/Regulations: 2009/142/EC, 2016/426, 305/2011, 89/106/EEC, 90/396/EEC; Standardization Mandates: M/131, M/BC/CEN/89/6. 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 751-1:1997 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-avgust-1997
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YURþRYRGRGHO $QDHUREQLWHVQLOQLPDWHULDOL
Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family
gases and hot water - Part 1: Anaerobic jointing compounds
Dichtmittel für Gewindeverbindungen in Kontakt mit Gasen der 1., 2. und 3. Familie und
Heißwasser - Teil 1: Anaerobe Dichtmittel
Matériaux d'étanchéité pour raccords filetés en contact des gaz de la 1ere, 2eme et
3eme famille et de l'eau chaude - Partie 1: Composition d'étanchéité anaérobie
Ta slovenski standard je istoveten z: EN 751-1:1996
ICS:
83.140.50 Tesnila Seals
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
91.140.60 Sistemi za oskrbo z vodo Water supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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