1 Scope
This document specifies the characteristics of valves made from unplasticized polyamide
(PA-U) in accordance with ISO 16486‑1, intended to be buried and used for the supply of gaseous fuels.
It is applicable to isolating unidirectional and bi-directional valves with spigot
ends or electrofusion sockets intended to be fused with PA-U pipes or fittings conforming
to ISO 16486‑2 and ISO 16486‑3 respectively.
Valves made from material other than unplasticized polyamide designed for the supply
of gaseous fuels conforming to the relevant standards are permitted to be used in
PA-U piping systems according to the ISO 16486 series provided they have relevant PA-U connections for butt fusion or electrofusion ends
(see ISO 16486‑3). The component, i.e. the complete valve, is required to fulfil the requirements
of this document.
This document also specifies the test parameters for the test methods it describes.
In conjunction with ISO 16486‑1, ISO 16486‑2, ISO 16486‑3 andISO 16486‑5, this document is applicable to PA-U valves and their joints and to joints with components
of PA-U and other materials intended to be used under the following conditions:
a) a maximum operating pressure (MOP) of up to and including 18 bar 3 , or limited to 16 bar under regional CEN requirements, at a reference temperature
of 20 °C for design purposes;
NOTE 1 For the purpose o...
Open preview (PDF)Plastics piping systems for the supply of gaseous fuels. Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing - Valves