BSI 21/30407321 DC:2021 Edition

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BS EN 751-3. Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water – Part 3. Unsintered PTFE tapes and PTFE strings

Published By	Publication Date	Number of Pages
BSI	2021	23

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Categories: 91.140.40 - Gas supply systems, BSI

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Description

This document specifies requirements and test methods for unsintered polytetrafluorethylene (PTFE) tapes and polytetrafluorethylene (PTFE) strings (PTFE tapes or PTFE strings, for short) which are suitable for sealing threaded metallic joints as specified in EN 10226-1. This document covers two classes of PTFE tapes and PTFE strings suitable for fine (F) and coarse (G) threads. The PTFE tapes and PTFE strings 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, up to 7 bar for hot water of heating systems, and up to 0,2 bar in gas appliances and their auxiliary equipment. The maximum working pressure covered in this document is 20 bar which is relevant to LPG storage. The temperature range is limited to -20 °C to 125 °C. NOTE For applications outside the scope of this document (e. g. compressed gases), the purchaser should consult the manufacturer. Anaerobic jointing compounds are covered by EN 751 1, non-hardening sealing materials (e. g. in the form of jointing compound paste) are covered by EN 751-.

Additional information

Status	Definitive
Pages	23
Publication Date	2021-01-28
Standard Number	21/30407321 DC
Title	BS EN 751-3. Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water – Part 3. Unsintered PTFE tapes and PTFE strings
Identical National Standard Of	prEN 751-3
Descriptors	Thermal testing, Weight tolerances, Tape, Hot-water supply systems, 3rd family gases, Width, Pipe fittings, Dimensional tolerances, Thermal-cycling tests, Polytetrafluoroethylene, Temperature, Marking, Test specimens, Test equipment, Performance testing, Dimensions, Water, Dimensional measurement, Classification systems, Sealing materials, Gas pipes, Metals, Environment (working), Gas-powered devices, Pipe couplings, Lubricants, Vibration testing, 1st family gases, Pressure testing, Instructions for use, Leak tests, Determination of content, Pressure, 2nd family gases, Wrapping tests, Testing conditions, Screwed fittings
Publisher	BSI
Committee	PRI/70
ICS Codes	91.140.40 - Gas supply systems

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BSI 21/30407321 DC:2021 Edition

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