CEN/TC 108 - Sealing materials and lubricants for gas appliances and gas equipment

This document specifies requirements and test methods of foam producing solutions for leak detection (hereafter called leak detection solution) used for leak detection of combustible gases of the 1st family (town gas), 2nd family (natural gas), and 3rd family (liquefied petroleum gases (LPG)) (see EN 437) within the temperature range of -15 °C or 0 °C to 50 °C. It is applicable for leak detection solutions, which are delivered as ready to use solutions, e.g. in spray cans.
Note   The leak detection solution covered by this document may also be used for other compressed gases. In this case the producer has to be consulted.

This European Standard specifies the properties and the test methods of sealants used to reseal threaded joints of metallic gas pipework in buildings operated at a maximum allowed operating pressure of 100 mbar (such sealants hereafter are referred to as "sealants").   Note Gas pipework in buildings is in accord ance with EN 1775 the pipework between the point  of delivery and the inlet connection to the gas appliance.

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 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.]

2020-01-20: Originator of XML version: NEN (on behalf of NEN, ASI, DS, SFS, SIS, SN)

This standard specifies requirements and methods of test for lubricants to be used in gas appliances of all categories including auxilliary equipment mounted or intended to be mounted on such appliances and which may be in contact with combustible gases, except those designed for use in industrial processes.

This European Standard specifies requirements and test methods for unsintered polytetrafluorethylene (PTFE) tapes (hereafter referred to as PTFE tapes) which are suitable for sealing threaded metallic joints as specified in ISO 7-1. The PTFE tapes are typically for use in installations for 1st family gases (town gas), 2nd family gases (natural gas) and 3rd family gases (liquefied petroleum gases (LPG)) up to 5 bar and up to 7 bar for hot water of heating systems (Class A) as well as up to 0,2 bar in gas appliances and their auxiliary equipment (Class B). The maximum working pressure covered in this European Standard is 20 bar which is relevant to LPG storage (Class C). The temperature range is limited to - 20 øC to 125 øC.  NOTE:  For applications outside the scope of this Standard (e.g. compressed gases) the purchaser should consult the manufacturer.  Anaerobic jointing compounds are covered by EN 751-1, non-hardening sealing materials in form of - e.g. jointing compound paste - are covered by EN 751-2.

This standard specifies requirements and associated test methods for vulcanized rubber materials used in gas appliances and equipment in contact with 1st, 2nd and 3rd family combustible gases. It also establishes a classification based on temperature range and hardness. This standard is applicable to materials from which are manufactured homogeneous seals and homogeneous or reinforced diaphragms.  The normal range of operating temperatures covered by this standard is 0 øC to + 60 øC. Tests are also included for applications using diaphragms within the range - 20 øC to + 80 øC and seals within the range - 20 øC to + 150 øC. For temperatures outside these ranges the user should contact the manufacturer regarding the suitability of the rubber material.  This standard includes two normative annexes for the verification that a component (finished product) was produced from a previously type tested material complying with requirements of this standard as declared by the appliance or equipment manufacturer or supplier of the component.  This standard is not applicable to silicone rubber used either above 200 mbar nominal pressure or at temperatures below 0 øC with 3rd family gases as there is possibility of condensation. This standard is also not applicable to seals and diaphragms for devices in gas transmission systems nor in such equipment used in 1st and 2nd family gas distribution systems.

This European Standard specifies requirements and test methods for homogeneous rubbers for static  eals used in domestic gas appliances of all categories, and in auxiliary equipment mounted or intended to be mounted on such appliances which are in contact with combustible gases up to 200 mbar (not including LPG in liquid phase).  This standard does not specify the geometrical characteristics of the seals.           The normal range of envisaged operating temperatures covered by this standard is 0 øC to 60 øC. Temperatures outside this range can be proposed by the manufacturer with limits between - 20 øC and + 150 øC.