Oil and gas

API 5CT Gr H40 casing is a kind of petroleum casing, which belongs to the oil and gas industry pipes.

ASTM A335 is the standard specification for seamless ferritic alloy steel pipe for high temperature applications. Different grades (P1, P2, P5, P9, etc.) represent different alloy compositions.

ASTM A790 UNS S32750 seamless pipes are mainly used in submarine pipeline laying, shipbuilding and offshore gas field exploitation where high strength and high corrosion resistance are required.

Electric Resistance Welded (ERW) pipe is manufactured by cold forming a flat steel strip into a rounded tube and passing it through a series of forming rollers to obtain a longitudinal seam. The two edges are then simultaneously heated with a high frequency current and squeezed together to form a bond. The longitudinal ERW seam does not require filler metal.