8 series : seamless steel pipes for use in low and medium pressure boilers, petroleum casing pipes, ships, fluid conveyance, petroleum cracking, chemical fertilizer equipments, structures, and hollow pumping rods.
OD: 1/4"---32"
Thickness: SCH30 、SCH40、SCH80、SCH160 znd so on
Standards: GB、ASTM、API5L、API5CT、DIN and JIS .