** Pipe fittings chosen by 2008 Beijing Olympic Stadium** 1) The electric-melt pipe fittings has conformed to international standard, use advance technologies 2) Various dimensions: 50mm, 63mm, 75mm, 90mm, 110mm, 160mm, 200mm, 250mm, 315mm, 400mm 3) The wall thickness of the pipe fittings is designed for reinforcement, and thus the strength is higher and the service life is longer compared with ordinary electric-melt pipe fittings 4) Through the sight hold of the pipe fittings, welding process can be observed.