DIN30670 for three-layer extruded and one- or multi-layered sintered polyethylene-based coatings

DIN30671 thermoset plastic coating For buried steel pipes
DIN30678 polypropylene coatings for steel pipes
CAN/CSA Z245.20/-Z245.21-02 external fusion bond epoxy coating for steel pipe/external polyethylene coating for pipe
SY/T4013-2002 for transport water, gas, oil,piling coating
SY/T0315-97 PE coating for buried steel pipe