Of heat-resisting steel
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel: > Other, of circular cross section, of other alloy steel: > Cold-drawn or cold-rolled (cold-reduced): > Other > Other: > Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters: > Of heat-resisting steel
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Products classified under HTS 7304.51.50.15
Cold-Drawn Heat-Resisting Steel Boiler Tube
Seamless cold-drawn tube made from heat-resisting alloy steel, designed for high-temperature applications in steam boilers. Its circular cross-section and cold-rolled finish ensure pressure resistance and durability in superheaters. Classified under 7304.51.50.15 due to its seamless construction, heat-resisting steel composition, and suitability for boilers.
Cold-Rolled TP310 Stainless Superheater Tube
Seamless cold-rolled tube of TP310 heat-resisting stainless steel for superheater coils in industrial boilers. Offers oxidation resistance up to 1100°C with precise wall thickness for high-pressure steam. Fits 7304.51.50.15 as cold-reduced, circular, seamless alloy steel tube for superheaters.
Cold-Reduced TP347HFG Condenser Tube
Seamless cold-reduced tube of TP347HFG stabilized stainless steel for water-cooled condensers in power plants. Engineered for thermal fatigue resistance in feedwater heaters. Classified in 7304.51.50.15 as heat-resisting alloy steel tube for condensers.
Alloy 625 Refining Furnace Tube
Cold-drawn seamless Alloy 625 tube of heat-resisting nickel-chromium-molybdenum steel for pyrolysis furnace coils in oil refineries. Withstands carburization and high-temperature cracking. Meets 7304.51.50.15 criteria for cold-rolled seamless tubes suitable for refining furnaces.
TP321H Cold-Rolled Boiler Economizer Tube
Seamless cold-rolled TP321H stabilized stainless tube for economizer sections in recovery boilers. Stabilized against weld decay in wet corrosive flue gas. 7304.51.50.15 applies to its heat-resisting seamless cold-formed construction for boilers.
Hastelloy C-276 Seamless Transfer Line Tube
Cold-drawn Hastelloy C-276 tube for high-temperature transfer lines from refining furnaces to reactors. Exceptional corrosion resistance in hydrogen atmospheres. Fits 7304.51.50.15 as cold-reduced heat-resisting alloy steel for refining furnaces.
Cold-Reduced 25Cr-35Ni Boiler Tube
Seamless cold-reduced centrifugally cast modified 25Cr-35Ni steel tube for waste heat boiler convection sections. Heat-resisting for carburizing flue gases. 7304.51.50.15 for cold-formed suitable boiler tubes of heat-resisting steel.
Seamless Incoloy 800H Heat Exchanger Tube
Cold-drawn seamless tube from Incoloy 800H nickel-chromium alloy steel, heat-resisting for shell-and-tube heat exchangers in refineries. Provides creep resistance at elevated temperatures in corrosive environments. Under 7304.51.50.15 for cold-reduced seamless heat-resisting steel tubes suitable for heat exchangers.
Cold-Finished RA85H Feedwater Heater Tube
Seamless cold-finished RA85H heat-resisting steel tube for high-pressure feedwater heaters in fossil fuel plants. Features enhanced thermal conductivity and erosion resistance. Under 7304.51.50.15 for its cold-reduced form and specified end use in feedwater heaters.