Seamless pipe means a pipe with a hollow section and no joints in the middle, which is widely used in various industries such as petrochemical industry. In the process of manufacturing seamless pipes, it is generally necessary to cut the seamless pipes to a specified size. Under the existing technical conditions, the cutting of seamless pipes generally uses a sawing machine or flame cutting.

ASTM A500 is a standard specification for seamless and weldable carbon structural steel published by ASTM International. ASTM A500 rectangular pipe is a rectangular steel pipe that can be welded, riveted, or bolted for use in bridges or buildings and general structures.

ASTM A500 square tube is a cold worked seamless and welded special section carbon structural steel pipe.

At present, ASTM A500 square pipes are all rolled from billets, and the main rolling methods are cold rolling and hot rolling, which will affect the structure and properties of ASTM A500 square pipes to varying degrees.

Normalizing, also known as normalizing, is to heat the workpiece to Ac3 (Ac refers to the final temperature at which all free ferrite is transformed into austenite during heating.Generally from 727℃ to 912℃) or Acm (Acm is the critical temperature line for complete austenitization of hypereutectoid steel in actual heating) 30~50℃.After holding for a period of time, the metal heat treatment process cooled in air or by water, spray or blowing is removed from the furnace.

Compared with ordinary seamless pipes, cs seamless pipes have simpler smelting process, good pressure processing performance, good cutting performance, and comprehensive mechanical properties are also better than ordinary seamless pipes, and even it has a lower cost than ordinary seamless pipes. . Therefore, many people are more inclined to choose cs seamless pipe.