1) Pipe fittings chosen by 2008 Beijing Olympic Stadium 2) The electric-melt pipe fittings has conformed to international standard, use advance technologies 3) Various dimensions: 50mm, 63mm, 75mm, 90mm, 110mm 4) 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 5) Through the sight hold of the pipe fittings, welding process can be observed.