Marine engineering

S235JRH grade belongs to standard EN10219. EN10219 S235JRH welded steel pipe is a carbon structural steel, JR means its impact properties are at room temperature.

JIS G3456 STPT 480 seamless carbon steel pipe is commonly used in high temperature applications such as steam pipes, boilers and pressure vessels.

GB/T 18248 seamless gas cylinder tube is a kind of seamless steel tube for gas cylinders.

ASTM A106 seamless steel pipe includes two processes: cold drawn and hot rolled. Among them, cold drawn has higher dimensional accuracy than hot rolled, and the surface of hot rolled steel pipe is relatively rough. The large-diameter seamless steel pipe is hot-rolled steel pipe, and the small-diameter is cold drawn.