pipe used in bridge construction project

SUS630 also known as 17-4PH, is a high-strength, corrosion-resistant martensitic stainless steel alloy.

This specification covers straight seam and spiral butt seam welded unannealed austenitic stainless steel tubular products intended for low and moderate temperatures and corrosive service where treatment is not necessary for corrosion resistance.

DIN 1628 ERW Carbon Steel Pipe is a type of steel pipe manufactured by the electric resistance welding process.

ASME SA213M / SA213 T9 is the standard applicable to Seamless Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.