Stainless steel welded Boiler and Heat exchanger tubes Name: Stainless Steel ... your request.5.Finishing: annealed, pickled, polished inside and outsidegrit: 2B(Mill Finish), 2D, 180#, 320#, ... used in sewerage disposal, decoration,food, beverage, milk, refine sugar, medicine, etc.8.Best products+ ... used in sewerage disposal, decoration,food, beverage, milk, refine sugar, medicine, etc.8.Best products+ ...