... , Varnish, Passivation, Phosphating, Shot Blasting2.Carbon Alloy Tube Application:Boiler, Superheater and Heat-ExchangerProduction Standard, Steel ... Production Standard, Steel Grade:ASTM A179 Delivery Conditions:Annealed, Normalized, Normalized and Tempered Inspection and Test: ... Varnish, Passivation, Phosphating, Shot Blasting. 4.Boiler Tube Application:For high, middle, low pressure boiler and ...