Stainless steel pipe is a pipe made of stainless steel as raw material through multiple processes.
Stainless steel is divided into five categories according to the crystal structure: austenitic stainless steel (A1, A2, A3, A4, A5), ferritic stainless steel (F1), martensitic stainless steel (C1, C4, C3), duplex stainless steel and precipitation hardening stainless steel.