Thick-walled steel pipe production steps

Thick-walled steel pipes refer to steel pipes whose outer diameter and wall thickness ratio is less than 20 as thick-walled steel pipes. Mainly used as petroleum geological drilling pipe, cracking pipe for the petrochemical industry, boiler pipe, bearing pipe, and high-precision structural pipe for automobiles, tractors, etc.

The big difference between thick-walled steel pipes and thin-walled steel pipes is the thickness of the steel pipe wall. Generally speaking, thin-walled steel pipes are cold-drawn technology, while thick-walled steel pipes and thick-walled steel pipes generally use hot-rolling technology, if they are distinguished by units of measure. , then, it is generally believed that the wall thickness/pipe diameter equal to 0.02 is the watershed between thick-walled steel pipes and thin-walled steel pipes, those with wall thickness/pipe diameter less than 0.02 are thin-walled steel pipes, and those larger than 0.02 are thick-walled steel pipes. In terms of use, thin-walled steel pipes Wall steel pipes are mostly used on pipes. Thick-walled steel pipes are mostly used in blanks for hollow parts. Use on pressure-bearing and important pipelines. Thick-walled steel pipes are mainly used in water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction. For liquid transportation: water supply, drainage. For gas transportation: gas, steam, liquefied petroleum gas. For structural purposes: for piling pipes, for bridges; for wharves, roads, building structures, etc.

Thick-walled steel pipe production steps:

1. The stainless steel elbow is made of thick-walled steel pipe, and the wall thickness changes along the length of the pipe;

2. Process the section of the square tube, and change the circular section into a square, oval, and polygon;

3. For square pipes with crimping and bottom sealing, increase the overall strength of the pipe end by crimping to the outside or inside of the pipe or sealing the end of the square pipe;

4. Stainless steel elbow variable diameter square tube refers to the reduction of the diameter of the pipe end or a certain part of the pipe;

5. Stainless steel elbows are used to bend square tubes. The ones that have more contact are to turn straight tubes into elbows with different curvature radii, such as elbows, elbows, etc.;

6. Square tubes with flanges and round edges, the former refers to the end of the tube protruding to the inside or the outside, the latter refers to the square tube that forms a bulge or a groove in the circumferential direction of the tube