... , 2m, 3m, 12m c)Pressure Class:PN1-PN25 On view of the light in weight,corrosion-resistant,long service life,low ... been applied successfully in many projects.We can supply you GRP Pipes according to the AWWAC-950, ASTM D3745 and other ... screw-thread wound GRP composite thermal insulation direct-buried pipe. This pipe has been widely used in fields of petroleum, mine, geothermal ...