... crosses, bifurcations, adapters, wallpieces, plugs, closures, etc. Through conversion parts or connecting parts, SPCP can connect to steel pipe, ductile iron casting ... accordingly go down. In addition, SPCP wear well and the operation and maintenance cost of it is low, so it usually ... 60 years or even 100 years. The service time of other kinds of concrete pipes is only about 20 years. Therefore, SPCP ...