Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold drawn

730630 Other, welded, of circular cross section, of iron or nonalloy steel:

73063010 Having a wall thickness of less than 1.65 mm

7306301010 Internally coated or lined with a non-electrically insulating material, suitable for use as electrical conduit

7306301090 Other

7306303000 Tapered steel pipes and tubes principally used as parts of illuminating articles

73063050 Other

7306305010 Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold drawn

7306305015 Other, cold-drawn

7306305020 Other, cold-rolled (cold-reduced) with a wall thickness not exceeding 2.54 mm

7306305026 With an outside diameter not exceeding 50.8 mm

7306305027 With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm

7306305028 Internally coated or lined with a non-electrically insulating material, suitable for use as electrical conduit

7306305031 With an outside diameter not exceeding 50.8 mm

7306305033 With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm

7306305035 Tube and pipe hollows for redrawing

7306305041 With an outside diameter not exceeding 50.8 mm

7306305043 With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm

7306305056 With an outside diameter not exceeding 50.8 mm

7306305057 With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm

7306305085 Galvanized

7306305090 Other