API 5L Hot Rolled Steel Seamless Pipe - Guangdong Lizz ...
API 5L Hot Rolled Steel Seamless Pipe is produced on the automatic plug mill. By examining and eliminating the surface defect,the solid pipe billet is cut into the required length.Before punching a hole,the center of the punching side should be marked and the billet should be heated on the heating furnace.Under the function of mill roll,a cavity is formed in the billet called semi-manufactured ...
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