242040 Tube or pipe fittings of steel, not cast

24204010 Flanges, of steel (excluding cast fittings) 24204030 Elbows, bends, couplings, sleeves and other threaded tube or pipe fittings, of steel (excluding cast fittings) 24204050 Elbows, bends, couplings and sleeves and other socket welding tube or pipe fittings, of steel (excluding cast fittings) 24204073 Butt welding elbows and bends, for tubes or pipes, of steel (excluding cast fittings) 24204075 Butt welding tube or pipe fittings, other than elbows and bends, of steel (excluding cast fittings)