ISO 16486-4 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 5.1Compound for valve body5.1.1 Compound The compound from which the valve body with spigot or electrofusion socket is made shall be inaccordance with ISO 16486-1. The PA-U components of the valve...