1. Inferior raw material steel belt:
The quality of stainless steel strip is the basis for determining the quality of stainless steel welded pipe, according to the level of copper content can be divided into low copper, medium copper and high copper, so that the production of stainless steel pipe ductility effect in turn, at the same time the price will increase. Because there are many stainless steel pipe brands on the market and peers pressure each other, profits are getting thinner and thinner, so there are bad manufacturers choose to use medium frequency charge, in fact, is the use of stainless steel waste recycling and reprocessing forged steel strip, this material has many impurities, high carbon content, high hardness, so it is easy to crack after processing and use for a long time.
2. Stainless steel strip is excellent:
The stainless steel strip is not enough temperature in the furnace when fading, resulting in the stainless steel strip is too hard, then during the welding process, due to thermal expansion and contraction, so there will also be fracture.
3. Over-grinding stainless steel welds:
If the weld of the stainless steel welded pipe cracks, it may also be because the stainless steel weld is over-polished, resulting in the weld is too thin, so cracking occurs during processing and use, which is a product quality problem, good stainless steel pipe manufacturers often control their own product quality strictly, and have their corresponding product certificates.
4. The stainless steel welded pipe weld is not nitrogenized:
If the stainless steel welded pipe is not protected by nitrogen during welding, then this stainless steel welded pipe is also prone to rust, pipe cracking and other problems, increasing nitrogen, which can protect the internal weld bead of the stainless steel welded pipe, which is more thorough and not easy to crack, and also reduces the problem of rust of stainless steel welded pipe.
5. The stainless steel pipe weld is not penetrated:
When welding stainless steel welded pipe, if the boot speed is too fast and the welding time is too short, it will cause the weld to be impenetrated, so it will also have an impact on the quality of stainless steel welded pipe, resulting in cracking of stainless steel welded pipe.
