SUS 304 316L stainless steel seamless square pipe

Seamless square rectangular pipe is a kind of hollow section with no joints around the strip of steel. The pipe is hollow, has a certain cross-sectional area, a lot of used for conveying fluid pipeline, such as conveying oil, natural gas, gas, water and some solid materials pipeline, ring section under internal or external radial pressure, the force is more uniform, therefore, the vast majority of steel pipe is round pipe. However, the round pipe also has certain limitations, such as under the condition of plane bending, the round pipe is not as strong as the square, rectangular pipe bending strength, some agricultural machinery skeleton, steel and wood furniture, etc., commonly used square, rectangular pipe.

Stainless Steel square tube is a hollow strip of steel, because the cross section is square so called square tube.

 According to section shape can be divided into square and Rectangular Tube, widely used is circular steel tube, but there are some semicircular, hexagonal, equilateral triangle, octagonal and other special-shaped steel tube.For stainless steel square tube under fluid pressure to carry out hydraulic test to test its pressure capacity and quality, under the specified pressure does not leak, wet or expansion for qualified, some steel pipe according to the standard or the requirements of the side of the roll test, flaring test, flattening test.Square tube specifications :5*5~150*150 mm thickness :0.4~ 6.0mmSquare tube material :304, 304L, TP304, TP316L, 316, 316L, 316Ti, 321, 347H, 310S, etc.The production process is: a. Round steel preparation; B. heating; C. Hot rolling perforation; D. cutting head; E. pickling. F. grinding; G. lubrication; H. Cold rolling; I. degreasing; J. Solution heat treatment; K. straightening; L. in cutting; M. pickling. N. Finished product inspection.