What is welding steel tube?

Welding steel tube is one pipe the surface has the steel pipe joint,which is use the steel belt or steel plate material through the bending deformation into round ,square ect then welded into shape .

According to different welding methods can be divided into electric arc welding tube, the high frequency or low frequency electric resistance welded pipe and gas welding tube, furnace welding pipe , bondi pipe, etc.  

Electric Resistance Welded steel tube used in oil drilling and machinery manufacturing, etc. 

Furnace tube welding pipe can be used for water gas pipe, etc .

Longitudinal Submerge-arc Welded used for high pressure straight oil and gas transportation etc.