... cast iron pipe of FRP pipes only 1/5, prestressed concrete pipe 1/10, in construction, reduced cost, ... field application, intion, intion, in particular the hydraulic characteristics.(1) pipeline pump can save cost. (2) reduce diameter ... the pressure piping and fittings, technical requirements of 1.5 times the pressure hydrostatic test.5 and ... glass pipe Nanjing LeJie Chinese large scale manufacturer