ISO 16486-4:2022 pdf download – Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing — Part 4: Valves. 5 Material 5.1 Compound for valve body 5.1.1 Compound The compound from which the valve body with spigot or electrofusion socket is made shall be in accordance with ISO 16486-1. The PA-U components of the valve shall be made from virgin material conforming to ISO 16486-1. 5.1.2 Fusion compatibility Components made from PA-U 11 shall be heat fusion jointed only to components made from PA-U 11. Components made from PA-U...