... dip, varnish, passivity, phosphate and shot blastingApplications: for tubular heat exchangers, condensers and similar heat transfer apparatusnspection/test: chemical composition, mechanical properties ... strength, elongation, flaring, flattening, hardness, impact test), surface and dimension test, no-destructive test and hydrostatic testHS Code: 7304900000high quality and service Seamless Steel Tube