Welded Steel Pipes Steel Hollow Section 304 Stainless Steel Square Tube

Welded Steel Pipes Steel Hollow Section 304 Stainless Steel Square Tube

What is Square pipe:

Square pipe is divided into seamless steel pipe and Welded Steel Pipe (slotted pipe).

According to the section shape, it can be divided into square and rectangular pipes.

Circular steel pipes are widely used but there are also some special-shaped steel

pipes such as semicircle, hexagon, equilateral triangle and octagon

Four production processes commonly used for stainless steel welded pipe:

1. Pickling and passivation of stainless steel welded pipe
Pickling passivation can produce a thin, dense and hard passivation film on the inner and outer walls of 

water pipes and pipe Fittings. The existence of passivation film is the fundamental reason for the prevention

 of corrosion of Stainless Steel Pipe fittings.

2. Gas shielded welding
Under the protection of gas, the chromium and nickel on the surface of stainless steel will not be oxidized 

during welding, which retains the original characteristics and corrosion resistance of stainless steel.
stainless steel pipe manufacturer

3. Sealing material
Sealing material is the key point of the service life of stainless steel welded pipe. The service life of sealing 

material determines the service life of stainless steel pipe. Our stainless steel pipe fittings adopt chlorinated

 butyl sealing rings imported from abroad, and the physical properties of the materials are much higher than 

those of domestic rubber.

4. Bright solid melting
After forming and welding process, stainless steel welded pipe parts must undergo 1050 degree solid 

fusion treatment, so as to eliminate the internal stress caused by deformation of stainless steel pipe fittings,

 reduce stress corrosion, restore the intergranular change in the welding process of pipe fittings, dissolve the 

carbides in the welding heat sensitive zone in austenite, and prevent adverse effects on the performance

of austenitic stainless steel.