BS 7291-2:2010
建筑物中家用和供暖设施用冷热水的热塑性管道及其相关配件.聚丁烯(PB)管及其相关配件用规范
Thermoplastics pipe and fitting systems for hot and cold water for domestic purposes and heating installations in buildings - Specification for polybutylene (PB) pipe and associated fittings