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.

The tensile strength of ST42 Carbon Steel Pipe shall not be less than 42kgf/mm2, which is 420MPa.ST42 Carbon Steel Pipe is a German standard seamless steel pipe, which is widely used. German standard seamless steel pipes for general purposes are rolled from ordinary carbon structural steel, low alloy structural steel or alloy structural steel, with the largest output, and are mainly used as pipes or structural parts for fluid transportation .

X42 pipeline pipe is the pipeline pipe with steel grade of X42. The pipeline pipe is used to transport the oil, steam and water pumped out of the ground to the oil and natural gas industrial enterprises through the pipeline pipe. Pipeline pipe includes seamless pipe and welded steel pipe, with flat end, threaded end and socket end at the pipe end; The connection methods are welding, coupling connection, socket connection, etc.