... good Corrosion resistance 2. 300 series3. Surface: mirror, satin, HL, etc3. Staibless steel welded pipe include: Round tube, square tube, rectangle tube, screw tube, embossed tube ... 30% deposit, 70% before loading8. Export standard packagingGood quality of stainless steel welded pipe: ProductStainless steel welded pipe ... 35% Hardness (HV)<253<253<200<200 Good quality 304 stainless steel welded pipe