... Description Field application: For tubular heat exchangers,condensers, and similar heat transfer apparatus.Production Standard, Steel Grade: ... Elongation, Flaring, Flattening, Flange, Hardness, Impact Test), Dimension and Surface Test, Non-destructive Test, Hydrostatic Test.Surface treatment:Oil ... Varnish, Passivation, Phosphorization, Shot Blasting. SA179 shell tube and gas water Heat Exchanger Pipe