-75-Table 9: Pickling of stainless steel pipes; pickling and passivation of welded seams in Tongqiang and other stainless steel pipes. Table 3: Passivation of stainless steel: Alloy composition (volume fraction), treatment temperature (°C), duration (minutes). 00, 300 and 400 series; precipitation-hardening heat-treated alloys.

316L stainless steel welded tubes are widely used in many industrial applications; their unique chemical composition and properties enable them to perform exceptionally well under specific conditions. 316L stainless steel welded tubes are renowned for their outstanding corrosion resistance, high-temperature tolerance, and excellent machinability and weldability.