Main application: used for making oil and natural gas transmission pipelines. API 5L generally refers to pipeline steel plate -- API 5L pipeline steel plate. When the pipeline steel plate is processed into large-diameter pipeline steel pipe, the oil, steam and water pumped out of the ground are transported to the oil and natural gas industrial enterprises through pipeline pipes.

2507 stainless steel is used in oil and natural gas industry; Offshore stone skyshatter oil platform (heat exchanger pipe, water treatment and water supply system, fire protection system, water spraying system, water stabilization system; petrochemical equipment; desalination (desalination) equipment (and high-pressure pipe and seawater pipe in the equipment). Mechanical and structural components that require both high strength and high corrosion resistance: fuel (waste) gas purification equipment.

A214 carbon steel pipe: resistance welded carbon steel pipe for heat exchanger and condenser.

430 stainless steel is used for building decoration, fuel burner parts, household appliances and household appliances. 430F is a steel with free cutting property added to 430 steel, mainly used for automatic lathes, bolts and nuts. 430LX adds Ti or Nb to 430 steel to reduce the content of C, which improves the processability and welding performance. It is mainly used in hot water tanks, hot water supply systems, sanitary appliances, household durable appliances, bicycle flywheels, etc.