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About This Item
Full Description
a) a maximum operating pressure (MOP), up to and including 10 bar1), at a reference temperature of 20 °C for design purposes;
b) an operating temperature between −20 °C and 40 °C. For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in ISO 4437-5. The ISO 4437 series covers a range of maximum operating pressures and gives requirements concerning colours. It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. This document is applicable for fittings of the following types:
— electrofusion socket fittings;
— electrofusion saddle fittings;
— spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion);
— socket fusion fittings;
— mechanical fittings. NOTE 1 The fittings can be, for example, in the form of couplers, saddles, equal and reduced tees, reducers, elbows, bends or end caps. NOTE 2 Fabricated fittings are normally not used for gas applications except for larger dimensions or in the absence of other solutions. Guidance can be found in ISO 4427-3:2019, Annex B.
Document History
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ISO 4437-3:2024
viewing
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings- Most Recent
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ISO 4437-3:2014
Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings- Historical Version
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ISO 4437:2007
Buried polyethylene (PE) pipes for the supply of gaseous fuels - Metric series - Specifications- Historical Version
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ISO 8085-3:2001
Polyethylene fittings for use with polyethylene pipes for the supply of gaseous fuels - Metric series - Specifications - Part 3: Electrofusion fittings- Historical Version
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ISO 8085-1:2001
Polyethylene fittings for use with polyethylene pipes for the supply of gaseous fuels - Metric series - Specifications - Part 1: Fittings for socket fusion using heated tools- Historical Version
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ISO 8085-2:2001
Polyethylene fittings for use with polyethylene pipes for the supply of gaseous fuels - Metric series - Specifications - Part 2: Spigot fittings for butt fusion, for socket fusion using heated tools and for use with electrofusion fittings- Historical Version
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ISO 4437:1997
Buried polyethylene (PE) pipes for the supply of gaseous fuels - Metric series - Specifications- Historical Version