The thick wall stainless steel pipe is well understood by listening to the name, that is, the thickness of the steel pipe is relatively large. Generally, the steel pipe with a ratio of the outer diameter of the steel pipe to the wall is called thick wall steel pipe.

Welding process of thick wall stainless steel pipes:

Round Tube Black-→ Heating-→ Passing-→ Three-rolling rolling, continuous rolling or squeezing-→ deserture-→ fixed diameter or reduction diameter-→ cooling-→ → water-→ water Pressure test or exploring-→ mark.

Let's talk about welding of thick wall stainless steel pipes:

1. Before welding, the oil, paint, water, rust, etc. should be cleaned first.

2. Open the slope in the thickness of the wall according to the wall thickness.

3. The gap between the product is generally 1-1.5 times that of the stripes. If the slopes are accidentally opened, you can leave a little more appropriately.

4. Point solid welding at least three points, usually four o'clock is easy to work.

5. Welding should be welded in half and half, and the starting point exceeds about one centimeter at the bottom, which is convenient for connecting from the opposite side.

6. If the wall thickness of the steel pipe should be layered, at least two layers, and the second layer of the first layer is welded and then welded in the second layer.

About the welding seam residue of thick wall stainless steel pipes:

When the wall thickness of the thick wall steel pipe is ≤12.5mm, the remaining height of the weld is ≤3.0mm;

When the wall thickness of the thick wall steel pipe is 12.5mm, the remaining height of the weld is ≤3.5mm.

About the curvature of thick wall stainless steel pipes:

The outer diameter of the steel pipe is ≤168.3mm, which should be straight or in accordance with the bending index specified in the agreement between the two parties of the supply and demand;

The nominal outer diameter of the steel pipe> 168.3mm, 0.2%of the total length of the steel pipe.

The end wall thickness of the steel pipe is 4mm, the tube end can process the sloper's mouth 30 °+5 ° 0 °, the roots are 1.6mm ± 0.8mm, and the tube end slope ≤ 5mm.