According to the manufacturing method, the steel pipe can be divided into two categories: seamless steel pipe and welded seam steel pipe. Among them, ERW steel pipe is the main variety of welded steel pipe. ...

According to the manufacturing method, the steel pipe can be divided into two categories: seamless steel pipe and welded seam steel pipe. Among them, ERW steel pipe is the main variety of welded steel pipe. ...

The epidemic situation of new coronary pneumonia in foreign countries is becoming more and more serious. Affected by the COVID-19 situation, global steel mills have reduced their output of production, and some foreign steel companies ...