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Welded steel pipe can be divided into straight seam welded pipe and spiral welded pipe according to the welding method.
Different can be divided into arc welded pipe, high-frequency or low-frequency resistance welded pipe, gas welded pipe, furnace welded pipe, Bondi pipe, etc.
Welded steel pipe: used in oil drilling and production and machinery manufacturing.
Furnace welded pipe: it can be used as water gas pipe, large diameter straight seam welded pipe for high-pressure oil and gas transportation, etc; Spiral welded pipe is used for oil and gas transportation, pipe pile, pier, etc.

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