... steel welded tube / pipe Technics:Bead removed & Bright annealed. Test:Eddy current & Hydrostatic test, etc. Stainless steel welded tube / pipe1. Standard: GB ... : bead removed, bright annealed, pickling, electropolishing, mechanical polishing.8. Test: eddy current, hydrostatic test, mechanical properties test, chemical test, etc.9. Packing ...