NF EN ISO 16486-3, T54-066-3 (01/2025)

This document specifies the physical and mechanical properties of unplasticized polyamide (PA-U) fittings in accordance with ISO 16486-1, intended to be buried and used for the distribution of gaseous fuels. It also specifies the test parameters for the test methods it refers to. The ISO 16486 series applies to PA-U pipeline systems whose components are connected by welding assemblies and/or by mechanical assemblies. In addition, it defines the dimensional characteristics and requirements for marking of fittings. In conjunction with other parts of the ISO 16486 series, this document applies to PA-U fittings, their assemblies, assemblies with PA-U components, assemblies with mechanical fittings made of other materials, as well as with the following types of fittings: — weldable fittings (electrofusion fittings and butt welding fittings), and — transition fittings.
(Automatic translation from French)