Tag: Black Steel Pipe

Black Steel Pipe

Black steel pipe is the use of hot rolled steel sheet into the forming process. And welding with high frequency Accomplished as a black steel pipe Therefore, the black steel pipe will be a seam pipe. Most of them are…

Black Steel Pipe

Black steel pipe is the use of hot rolled steel sheet into the forming process. And welding with high frequency Accomplished as a black steel pipe Therefore, the black steel pipe will be a seam pipe. Most of them are…