... tube/pipe. Stainless steel welded tube / pipe:1. Standard: GB, ASTM, JIS, DIN, EN, AISI2. Material: 304, 304L, 316, 316L, etc3 ... : bead removed, bright annealed, pickling, electropolishing, mechanical polishing.8. Test: eddy current, hydrostatic test, mechanical properties test, chemical test, etc.9. Packing: plastic ...