It sounds like you're asking about stainless steel pipes. SS pipes are commonly used in a variety of industries due to theri strenght, corrosion resistance, and aesthetic appeal. Here are some key points about SS pipes:
Seamless Pipes:
Manufactured by extruding the metal to the desired lenght.
Advantage: high Strength and can with stand high pressure.
Welded:
Made by rolling a sheet of SS into a pipe shape and then welding the seam.
Advantage: Cost Effective and readily available in various sizes.
Trade: Jindal Stainless Steel