The causes of surface defects in seamless steel pipes are complicated. If listed, there are hundreds of influencing factors. Sometimes there are dozens of factors causing the same defect, and the occurrence of defects is closely related to the steel type. This is why the production of seamless steel pipes is complicated.
Generally speaking, it is caused by the following aspects:
1. In terms of raw materials:
Poor internal structure will cause internal folding, cracks in the pipe wall, delamination, etc.;
The poor surface quality of raw materials will cause outward folding;
2. Process operation:
Improper heating will cause internal folding, external folding, cracks in the pipe wall, separation layer, uneven wall thickness, etc.;
Improper processing, materials, adjustment, and use of processing molds can cause internal and external folding, uneven wall thickness, internal and external threads, pits, etc.
3. Equipment
In terms of equipment, internal and external folding, uneven wall thickness, internal and external threads, scratches, etc. are mainly caused by poor equipment performance, looseness, scratches, etc.
In daily life, you can analyze the factors that occur by checking the specific defects of steel pipes and the production process, and then judge the specific causes based on the production site.
Post time: Jan-25-2024