From their definition, we can see that one has no gaps and the other has gaps. And the seamless steel pipe can be seen from the outer surface, there is no gap in the whole body; the welded steel pipe has a welding gap. The price of seamless steel pipes is generally higher than that of welded steel p

TENGDI Machinery is an ERW tube mill manufacturer. Our manufacturing factory is located in China and produces high-quality ERW Tube mill production lines. It is the preferred supplier for new and old customers.We have advanced technology that can solve all problems on the erw pipe production line fo

TENGDI Machinery is an ERW tube mill manufacturer. Our manufacturing factory is located in China and produces high-quality ERW Tube mill production lines. It is the preferred supplier for new and old customers.We have advanced technology that can solve all problems on the erw pipe production line fo