Stainless welded pipes
At the start of the welded pipe manufacturing process so called slabs or billets are cast in a steel mill. Dependent on the external dimensions and wall thickness there are different methods of producing welded pipes and tubes: Electric Resistance Welding (ERW), Fusion Welding (EFW) and Double Submerged Arc Welding (DSAW).
In the ERW and EFW manufacturing process welded pipes are formed by hot or cold rolling plate and welding the seam. In order to keep the outside (O.D.) surface of a welded pipe smooth and uniform a cutting tool called scarfing blade is used to remove the weld flash. Scarfing from the inside (I.D.) welded flash is also possible.
With a heat treating at the end of the manufacturing process the weld zone of the steel pipe can be made less visible. Due to the weld seam lower operating pressures are stated in accordance with ASME compared to seamless pipes.
In general welded pipes possess tighter dimensional tolerances than seamless pipes and are less costly if produced in same quantities.
Stainless Welded Pipes - EN 10216-5
Stainless Welded Pipes - EN 10216-5 This type of welded pipes is considered for lower pressure purposes. Our welded stainless steel pipes are made to withstand the greatest heat and the high pressure; they are unaffected by acids and don't give corrosion a chance! A welded stainless steel pipe or tube can pass through more than 100 production steps before taking its final form and quality. Stainless welded tubes acc. to DIN EN 10216-5 come in a l..