The main cooling bed types of the seamless steel pipe production line are single chain cooling bed, double chain cooling bed, new chain cooling bed, stepping rack cooling bed and screw cooling bed.

Spiral steel pipe (SSAW pipe) is a welded steel pipe with spiral weld seam, which is made of strip steel coil as raw material, extruded at regular temperature, and welded by automatic double-wire double-sided submerged arc welding process. When there are defects such as broken arc, burn through, slag inclusion, pores, cracks and other defects in the weld of the spiral steel pipe, the problem weld of the spiral steel pipe needs to be repaired, which is called repair welding.

Welded steel pipe refers to a steel pipe with seams on the surface that is welded after bending and deforming a steel strip or steel plate into a circular, square or other shape. The blanks used for welded steel pipes are steel plates or strips. With the rapid development of continuous rolling production of high-quality strip steel and the advancement of welding and inspection technology, the quality of welds has been continuously improved, and the varieties and specifications of welded steel pipes have increased day by day, and seamless steel pipes have been replaced in more and more fields.

The steel sheet pile is a kind of steel structure with linkages on the edge, and the linkages can be freely combined to form a continuous and compact retaining wall or water retaining wall.

Anti-corrosion steel pipe refers to steel pipes that have been processed by anti-corrosion technology, which can effectively prevent or slow down the corrosion phenomenon caused by chemical or electrochemical reactions during transportation and use.

Decarburization is a phenomenon in which the surface carbon content of steel pipes (such as CS seamless pipes and welded steel pipes) decreases during heat treatment. The essence of decarburization is that the carbon atoms in the steel pipe react with the furnace atmosphere such as hydrogen or oxygen at high temperature to form methane or carbon monoxide.