The use and classification of seamless steel pipe Seamless steel pipe is a round, square, rectangular steel with a hollow section and no joints around it. Seamless steel pipes are made of steel ingots or solid tube blanks through perforation to make capillaries, which are then hot-rolled, cold-rolled or cold-drawn.

Uses: Seamless steel pipe is an economical section steel, which has a very important position in the economy and is widely used in petroleum, chemical industry, boilers, power stations, ships, machinery manufacturing, automobiles, aviation, aerospace, power, geology, construction and military industries. and other departments.
 
Classification: According to the shape of the section: round section pipe, special-shaped section pipe According to the material: carbon steel pipe, alloy steel pipe, stainless steel pipe, composite pipe According to the connection method: threaded connection, welding , top, expansion) tube, cold-rolled tube.
 
According to the application: the production process of seamless steel pipes for boiler tubes, oil well pipes, line pipes, structural pipes, fertilizer pipes The main production process (main inspection process) of hot-rolled seamless steel pipes: tube blank preparation and inspection→tube blank heating→ Perforation →Rolling Tube→Reheating of Waste Tube→Fixed (Reduced) Diameter→Heat Treatment→Finished Tube Straightening→Finishing→Inspection (Non-destructive, Physical and Chemical, Taiwan Inspection) →Storage.