Polyethylene pipes and fittings for the supply of gaseous fuels or water -- Training and assessment of fusion operators
气体燃料和水供应用聚乙烯管和管件—熔解操作员的训练和评定
Polyethylene pipes and fittings for the supply of gaseous fuels - Code of practice for design, handling and installation
供应气体燃料的聚乙烯管和配件.设计、搬运和安装实施规范
Polyethylene pipes of raised temperature resistance - General quality requirements, testing
提高了耐温性的聚乙烯管.一般质量要求.试验