Stainless steel pipe 304 316 alloys seamless and welded

The difference between 304 and 316 alloys lies in the molybdenum content (2-3% in 316), which increases the chloride ion corrosion resistance of 316 by 20%. Seamless pipes achieve high pressure resistance through hot rolling/cold drawing processes, while welded pipes use TIG or laser welding to ensure airtightness, both of which require passing ASTM intergranular corrosion testing.

304 316 seamless pipes are commonly used in lightweight scenarios such as food machinery, high-pressure pipelines, and welded pipe supports for new energy equipment. The top enterprise innovates online solid solution technology, with a seamless pipe tensile strength of 620MPa and welded pipe weld strength matching the base material by more than 95%.

The stainless steel pipe industry is accelerating the elimination of pickling processes and promoting the combination of hydrogen annealing and electrolytic polishing technology, which has enabled the salt spray test on the surface of pipes to exceed 2000 hours and reduced carbon emissions by 25%. The supporting intelligent eddy current testing system has achieved zero defect delivery.