Even the price of seamless steel pipe is higher than similar ERW steel pipe, we still figure out the trouble with it. Today, weâ??ll see the defects of it and find out the reasons so that we can avoid it during our usage period.

First of all, abscission would be the most superficial one as we can see by our eyes. There would be spiral separation in steel pipeâ??s inner surface. Due to the poor non-metallic inclusions, residual shrinkage of the material, we get the trouble. Thus, we need to figure out the characters of the medium needed to transport. Finally, we will choose the suitable steel pipe for it.
In addition, fold in the steel pipe. A symmetrical or single linear folded sometimes in the steel pipeâ??s inner surface. Due to the poor lubrication of the mandrel, we may see this trouble during the use. Thus, we should pay high attention to the productâ??s production process.
Other troubles, such as wall contraction, rolling scars, may also here. Thus, we should pick up the master to make the steel pipe for our engineering project.