... corrosion, sewage treatment, sea water and fossil-fired power cooling tower etc..It's assembled by the frp composite tubes, elbows, ... kind of compound materials which is formed by taking fiberglass as the reinforced material, and taking thermosetting resin as base, the ... pre-molding with a kind of section shape, and cured by heating die and finally cooling and auto-sawing. Pultrusion process is a kind ...