Gre line pipe od 2-14 / up to 3500 psi / up to 250ºf liner: internal protection in tubing or line pipe. Diameters 2 7/8 - 3 ½ grp pipes diameters 1-30 pressures 180 psi underground tanks single and double wall, up to 60,000 liters surface tanks vertical and horizontal, up to 180,000 liters.