EN 751-2:1996
(Main)Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 2: Non-hardening jointing compounds
Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 2: Non-hardening jointing compounds
This European Standard specifies requirements and test methods for non-hardening sealing materials (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 (Class A), in gas appliances and their auxiliary equipment (Class B) as well as in LPG storage (Class C) according to table 1. Anaerobic jointing compounds are covered by EN 751-1, non-hardening sealing materials in the form of PTFE-tapes are covered by EN 751-3.
Dichtmittel für Gewindeverbindungen in Kontakt mit Gasen der 1., 2. und 3. Familie und Heißwasser - Teil 2: Nichtaushärtende Dichtmittel
Diese Norm legt Anforderungen und Prüfmethoden für nichtaushärtende Dichtmittel (im weiteren als Dichtmittel bezeichnet) fest, die geeignet sind, metallene Gewindeverbindungen, wie sie z.B. in ISO 7-1 genormt sind, abzudichten. Diese Dichtmittel sind für den Einsatz in Kontakt mit Gasen der 1., 2. und 3. Gasfamilie und Heißwasser von Heizungsanlagen (Klasse A), für den Einsatz in Gasgeräten und deren Zusatzeinrichtungen (Klasse B), sowie in Gastransport und Flüssiggaslagerung (Klasse C) nach Tabelle 1 geeignet.
Matériaux d'étanchéité pour raccords filetés en contact des gaz de la 1ère, 2ème et 3ème famille et de l'eau chaude - Partie 2: Composition d'étanchéité non durcissante
Ces normes contiennent les exigences et les méthodes d'essais auxquelles doiventsatisfaire les matériaux d'étanchéité (appelés ci-dessous compositions d'étanchéité) convenant à étancher les raccords filetés métalliques décrits dansla Norme ISO 7-1. Ces compositions d'étanchéité sont utilisables pour les circuits des gaz du 1er, 2ème et 3ème groupe, et l'eau de chauffage (Classe A), pour les appareils à gaz et leur équipement auxiliaire (Classe B) de même que pour les circuits et le stockage du GPL (Classe C) en accord avec le Tableau 1.
Tesnilni materiali za kovinske navojne zveze v stiku s plini 1., 2. in 3. družine ter vročo vodo - 2. del: Nestrdljivi tesnilni materiali
General Information
- Status
- Published
- Publication Date
- 10-Dec-1996
- Withdrawal Date
- 29-Jun-1997
- Technical Committee
- CEN/TC 208 - Elastomeric seals for joints in pipework and pipelines
- Current Stage
- 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
- Start Date
- 04-Jun-2018
- Completion Date
- 04-Jun-2018
- Directive
- 89/106/EEC - Construction products
Overview
EN 751-2:1996 is a CEN European Standard that specifies requirements and test methods for non-hardening sealing materials (jointing compounds) used on metallic threaded joints (for example, joints conforming to ISO 7-1). The standard applies where threaded joints are in contact with 1st family gases (town gas), 2nd family gases (natural gas), 3rd family gases (LPG - excluding liquid form) and hot water in heating systems. It defines suitability classes for different uses (Class A - heating hot water, Class B - gas appliances and auxiliary equipment, Class C - LPG storage).
Key topics and requirements
EN 751-2 focuses on practical performance and safety attributes of non-hardening jointing compounds. Key technical topics covered include:
- Scope and applicability for threaded metallic joints and gas/hot-water environments
- Material performance criteria required for sealing effectiveness in contact with 1st, 2nd and 3rd family gases and hot water
- Test methods used to verify compliance (specified procedures to assess sealing behaviour and compatibility)
- Classification by application (Class A, B, C) that links compound selection to system type (heating, gas appliances, LPG storage)
- Marking and documentation expectations for manufacturers and suppliers to demonstrate conformity
Note: EN 751-2 covers non-hardening compounds specifically. Anaerobic thread sealants are addressed in EN 751-1, and PTFE tape products are covered by EN 751-3.
Applications
EN 751-2 is intended for real-world installations where long-term leak-tightness and compatibility with gases and hot water are critical. Typical applications include:
- Gas distribution and gas supply systems (natural gas, town gas)
- Domestic and commercial heating systems using hot water circuits
- Gas appliances and their auxiliary equipment (valves, fittings)
- LPG storage fittings (vapor-phase LPG applications)
Using compounds that meet EN 751-2 helps reduce leak risk, improve safety, and facilitate compliance with national gas installation regulations.
Who should use this standard
- Sealant manufacturers developing non-hardening jointing compounds
- Gas system OEMs and component manufacturers specifying threaded joint sealing solutions
- Installation contractors and gas engineers selecting approved sealants for safe installations
- Testing laboratories and conformity assessors verifying product performance against EN 751-2
- Standards and compliance teams within utilities and building services organizations
Related standards
- EN 751-1 - Anaerobic jointing compounds
- EN 751-3 - Non-hardening PTFE tapes for threaded joints
- ISO 7-1 - Threaded pipe fittings (reference for metallic threaded joint geometry)
Keywords: EN 751-2, non-hardening jointing compounds, sealing materials, threaded metallic joints, gas supply systems, natural gas, LPG, hot water, CEN standard.
Frequently Asked Questions
EN 751-2:1996 is a standard published by the European Committee for Standardization (CEN). Its full title is "Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 2: Non-hardening jointing compounds". This standard covers: This European Standard specifies requirements and test methods for non-hardening sealing materials (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 (Class A), in gas appliances and their auxiliary equipment (Class B) as well as in LPG storage (Class C) according to table 1. Anaerobic jointing compounds are covered by EN 751-1, non-hardening sealing materials in the form of PTFE-tapes are covered by EN 751-3.
This European Standard specifies requirements and test methods for non-hardening sealing materials (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 (Class A), in gas appliances and their auxiliary equipment (Class B) as well as in LPG storage (Class C) according to table 1. Anaerobic jointing compounds are covered by EN 751-1, non-hardening sealing materials in the form of PTFE-tapes are covered by EN 751-3.
EN 751-2:1996 is classified under the following ICS (International Classification for Standards) categories: 21.140 - Seals, glands; 23.040.80 - Seals for pipe and hose assemblies. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 751-2:1996 is associated with the following European legislation: EU Directives/Regulations: 2009/142/EC, 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.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-avgust-1997
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Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family
gases and hot water - Part 2: Non-hardening jointing compounds
Dichtmittel für Gewindeverbindungen in Kontakt mit Gasen der 1., 2. und 3. Familie und
Heißwasser - Teil 2: Nichtaushärtende Dichtmittel
Matériaux d'étanchéité pour raccords filetés en contact des gaz de la 1ere, 2eme et
3eme famille et de l'eau chaude - Partie 2: Composition d'étanchéité non durcissante
Ta slovenski standard je istoveten z: EN 751-2:1996
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.
...
This article introduces EN 751-2:1996, a European standard that specifies requirements and test methods for non-hardening sealing materials, also known as jointing compounds. These compounds are designed for use in sealing threaded metallic joints, as specified in ISO 7-1. The standard specifically focuses on jointing compounds used in the presence of different gases (1st, 2nd, and 3rd family gases) and hot water in various applications, such as gas appliances, heating systems, and LPG storage. It should be noted that anaerobic jointing compounds are covered by another standard, EN 751-1, while non-hardening sealing materials in the form of PTFE-tapes are covered by EN 751-3.
이 기사는 EN 751-2:1996 유럽 표준에 대해 설명하고 있습니다. 이 표준은 ISO 7-1에서 명시된 대조선 금속 스레드 연접에 적합한 비경화 실링 재료 (이하 연합 화합물이라고 함)에 대한 요구 사항 및 시험 방법을 명시합니다. 이 연합 화합물은 1 차 가스 (도시 가스), 2 차 가스 (천연 가스) 및 3 차 가스 (액화 석유 가스 (LPG)는 포함되지 않음) 및 난방 시스템의 온수 (A급)와 가스 기기 및 보조 기기 (B급) 및 LPG 저장 (C급)과의 접촉에 사용됩니다. Anaerobic 연합 화합물은 EN 751-1에서 다루며 PTFE 테이프 형식의 비경화 실링 재료는 EN 751-3에서 다루고 있습니다.
この記事では、EN 751-2:1996という欧州規格について説明されています。この規格は、ISO 7-1で指定された金属スレッド接合部に適した非硬化性シーリング材料（以下、接合化合物と呼ぶ）の要件および試験方法を定めています。これらの接合化合物は、1次家庭用ガス（町のガス）、2次家庭用ガス（天然ガス）、および3次家庭用ガス（液化石油ガス（LPG）を含まない状態のLPG）と加熱システムの熱水（Aクラス）、ガス機器およびその補助機器（Bクラス）、およびLPG貯蔵（Cクラス）との接触時に使用されます（表1に記載）。アナエロビックな接合化合物についてはEN 751-1で、非硬化性シーリング材料のPTFEテープ形式についてはEN 751-3で取り扱われています。
이 기사는 "EN 751-2:1996 - 1순위, 2순위, 3순위 가스 및 뜨거운 물과 접촉하는 금속 스레드 조인트용 밀봉 재료 - 제 2부: 단단해지지 않는 조인팅 화합물"에 관한 내용을 다루고 있습니다. 이 유럽 표준은 ISO 7-1에서 지정된 대로 스레드 금속 조인트를 밀봉하는 데 사용되는 단단해지지 않는 밀봉 재료(이하 조인팅 화합물이라고 함)에 대한 요구사항과 시험 방법을 명시하고 있습니다. 이 표준은 1순위 가스(타운 가스), 2순위 가스(천연 가스) 및 3순위 가스(액상 석유 가스 중 액체 상태의 LPG는 제외) 및 난방 시스템의 뜨거운 물(Class A)과 가스 가전제품 및 보조 장비(Class B) 그리고 LPG 저장(Class C)과의 접촉에서 사용되며, 테이블 1에 따라 Anaerobic 조인팅 화합물은 EN 751-1에, PTFE 테이프 형태의 단단해지지 않는 밀봉 재료는 EN 751-3에 포함됩니다.
This article discusses the European Standard EN 751-2:1996, which outlines requirements and test methods for non-hardening sealing materials, also known as jointing compounds. These compounds are used to seal threaded metallic joints, specifically those specified in ISO 7-1. The jointing compounds specified in this standard are suitable for use with 1st family gases (town gas), 2nd family gases (natural gas), and 3rd family gases (liquefied petroleum gases excluding LPG in liquid form), as well as hot water in heating systems. They are applicable in gas appliances and their auxiliary equipment, as well as in LPG storage. This standard excludes anaerobic jointing compounds (covered by EN 751-1) and non-hardening sealing materials in the form of PTFE tapes (covered by EN 751-3).
この記事では、「EN 751-2:1996 - 1次、2次、3次のガスおよび温水と接触する金属スレッド接合部用のシール材料 - 第2部：硬化しない接合材料」という欧州標準について言及しています。この規格は、ISO 7-1で指定されるような金属スレッド接合部をシールするための硬化しないシール材料（以下、接合材料と呼ぶ）に対する要件と試験方法を規定しています。この規格で指定される接合材料は、1次のガス（都市ガス）、2次のガス（天然ガス）、および3次のガス（液体状態のLPGを除く液化石油ガス）と、暖房システムの熱水（Aクラス）や、ガス機器およびその補助機器（Bクラス）の接触に使用されるもので、LPGの貯蔵（Cクラス）にも適用されます。ただし、この規格はアナエロビックな接合材料（EN 751-1でカバーされている）およびPTFEテープ形状の硬化しないシール材料（EN 751-3でカバーされている）を除外しています。
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