The stainless steel tube is a hollow strip of round steel, which is mainly used in industrial transportation pipelines such as petroleum, chemical, medical, food, light industry, mechanical appearance, and mechanical structural components. Also, in the bend. The torsional strength together, lighter weight, is also widely used in the production of Pipe Mill
mechanical parts and engineering structures. Also used to produce a variety of weapons, barrels, shells and so on.
The seamless tube is fabricated by punching a hole in a stainless steel billet at a temperature of 2200 °f. At this high temperature, the tool steel is softened and spirally formed from the air by stamping and drawing. In this way, the wall thickness of the pipe is uneven and the degree of partial pain is high. Therefore, ASTM promises that the wall thickness of the seamless welded pipe is larger than the wall thickness of the welded pipe. The seamed tubes are made of accurate cold-rolled sheets (4-5 feet per roll width).
These cold-rolled sheets generally have a maximum wall thickness difference of 0.002 inches and the steel sheet is cut to a width of πd, during which d is outside the pipe. path. The public service with the wall thickness of the seam is small, and the wall thickness of the entire circumference is very uniform.
2, welding function
There are generally certain differences in the chemical composition of the seamed tube and the seamless tube. The steel components that produce seamless pipes are only the basic requirements for reaching ASTM. The steel produced with the seamed pipe contains a weld melt which is suitable for the transfer of heat during the welding process and is welded through the entire weld. Pipe Mills
with fewer chemical components, such as seamless tubes, have various unstable factors during the soldering process and are not easily soldered and soldered.