... type cast iron pipe fittings for drainage GB/T12772-2008cast iron drainage pipe and fittings, soil pipes, cip, pipe fittings, coupling, ... drainage system, widely used in sanitary Drain, Waste, and Vent, sewer drainage applications. Compared with plastic(PVC) pipes, cast iron pipe ... has become architects' first choice for drainage inside the building.1) For no-hub pipe: Standard: EN877, ISO6594; ASTM ...