... .No pollution, no leakage, high tensile strength, cost saving GRP pipe of GRAD Two kinds of pipes: GRP filament winding pipes ... :1. Diameter: 25mm~4,000mm.2. Length: 6m/12m per pipe.3. Pressure: Middle and low, 0.6MPa~2.5MPa. High ... :1. Diameter: 300mm~4,000mm.2. Length: 6m/12m per pipe.3. Pressure class: 0.1MPa, o.6MPa , 1.0MPa , 1 ...