... projects.A and characteristics1, high strength: the proportion of FRP pipes for 1.65-2.0. For the same length, diameter ... of the carbon steel and cast iron pipe of FRP pipes only 1/5, prestressed concrete pipe 1/10, in construction ... by secondary pollution.3, water resistant, corrosion resistance of FRP pipes excellent corrosion resistance, anti-corrosion, reduced costced cost prolong the ...