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ERW Steel Pipe-
ERW Steel Pipe
Electric Resistance Welded steel pipe which is manufactured by cold forming a flat steel strip into a rounded tube and passing it through a series of forming rollers to obtain a longitudinal seam.
SAWL Steel Pipe-
SAWL Steel Pipe
LSAW steel pipe or SAWL steel pipe,i.e. Longitudinally Submerged Arc Welding Pipe, which can be used as a steel pipe for land and ocean natural gas transportation, shale gas, petroleum, petrochemical,etc.
HFW Steel Pipe-
HFW Steel Pipe
HFW steel pipe, i.e high -frequency electric welded pipes is another kind of welded steel pipes.
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