** 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: From 63mm to 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.