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 10217-7
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What are the primary manufacturing methods used for stainless welded pipes?
The primary manufacturing methods for stainless welded pipes include Electric Resistance Welding (ERW), Fusion Welding (EFW), and Double Submerged Arc Welding (DSAW). Each method has its unique advantages and is selected based on the required specifications such as pipe diameter, wall thickness, and application.
What are the advantages of using stainless welded pipes over other types of pipes?
Stainless welded pipes offer several advantages, including enhanced corrosion resistance, improved strength, and durability. They are ideal for applications where high temperatures and pressures are present, making them suitable for industries such as oil and gas, chemical processing, and food processing.
How do the standards impact the quality of stainless welded pipes?
The quality of stainless welded pipes is significantly impacted by adherence to industry standards such as EN 10217-7. Compliance with these standards ensures that the pipes meet essential performance and safety requirements, providing assurance of their reliability in critical applications.