Other
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: > Other
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 7304.51.50.45
Cold-Drawn Alloy Steel Boiler Tube SA-213 TP304
Seamless cold-drawn tube of circular cross-section made from TP304 stainless alloy steel, specifically designed for high-pressure boiler applications. It meets ASME SA-213 standards for use in superheaters and heat exchangers due to its corrosion resistance and strength at elevated temperatures. Classified under 7304.51.50.45 as cold-formed seamless alloy steel tube suitable for boilers.
Cold-Drawn Superheater Tube ASTM A335 P11
Seamless cold-drawn tube of P11 alloy steel per ASTM A335, engineered for superheaters in power generation boilers. It withstands high temperatures and pressures while resisting creep and oxidation. Classified in 7304.51.50.45 as suitable for superheaters.
Cold-Drawn Alloy Steel Superheater Riser Tube
Cold-drawn seamless riser tube of 2.25Cr-1Mo alloy steel for connecting superheater sections in utility boilers. Provides reliable high-pressure steam flow with oxidation resistance. Classified 7304.51.50.45 for superheaters.
Cold-Rolled Seamless Heat Exchanger Tube SA-213 TP316
Cold-rolled seamless tube from TP316 alloy steel, optimized for heat exchangers and condensers in refining processes. Its enhanced molybdenum content provides superior resistance to pitting and corrosion in harsh environments. Falls under 7304.51.50.45 for cold-formed alloy steel tubes designated for heat exchangers.
Cold-Drawn High-Pressure Boiler Header Tube TP304H
Cold-drawn TP304H seamless tube for high-pressure boiler headers and manifolds. Higher carbon for elevated temperature strength. Classified 7304.51.50.45 for boiler use.
Cold-Reduced Condenser Tube SA-213 TP321
Cold-reduced seamless tube from TP321 stabilized stainless alloy steel for condenser tubes in steam power plants. Titanium stabilization prevents carbide precipitation during welding and high-heat exposure. Under 7304.51.50.45 for cold-formed alloy tubes in condensers.
Cold-Drawn Feedwater Heater Tube ASTM A213 T22
Seamless cold-drawn T22 alloy steel tube per ASTM A213 for feedwater heaters in thermal power stations. Designed for high-temperature water service with excellent thermal conductivity and erosion resistance. Fits 7304.51.50.45 as suitable for feedwater heaters.
Cold-Rolled Refining Furnace Tube SA-213 TP310
Cold-rolled seamless TP310 alloy steel tube for refining furnace transfer lines, offering high-temperature oxidation resistance. Ideal for petrochemical cracking furnaces and reformers. Classified under 7304.51.50.45 for refining furnace suitability.
Cold-Drawn Boiler Economizer Tube P91 Alloy
Cold-drawn seamless P91 (Grade 91) alloy steel tube for boiler economizers, enhancing fuel efficiency through preheating. Known for creep strength in 9Cr-1Mo-V composition. Under 7304.51.50.45 for boiler applications.
Cold-Reduced Heat Recovery Steam Generator Tube TP347H
Cold-reduced TP347H seamless tube for heat recovery steam generators (HRSG) in combined cycle plants. Niobium-stabilized for weldability in high-stress areas. Fits 7304.51.50.45 for heat exchanger use.
Cold-Rolled Stainless Alloy Condenser Service Tube
Cold-rolled seamless tube of TP316Ti alloy for condenser service water lines in power plants. Improved corrosion resistance for cooling water environments. Under 7304.51.50.45 as condenser-suitable.
Cold-Drawn Refinery Cracking Furnace Tube
Cold-drawn seamless HK40 alloy steel tube for ethylene cracking furnaces in refineries. Cast-and-wrought design for extreme carburizing atmospheres. 7304.51.50.45 for refining furnaces.
Cold-Reduced Boiler Wall Tube Grade T91
Cold-reduced T91 seamless tube for furnace wall panels in supercritical boilers. Advanced 9Cr steel for ultra-high efficiency plants. Suitable for boilers under 7304.51.50.45.
Cold-Drawn Alloy Evaporator Tube for Multi-Effect Distillers
Cold-drawn TP316L seamless tube for evaporator sections in multi-effect desalination distillers. Low-carbon for weldability in heat exchanger duties. 7304.51.50.45 for heat exchangers.
Cold-Rolled Feedwater Preheater Tube SA335 P22
Cold-rolled SA335 P22 seamless tube for low-pressure feedwater preheaters. 2.25Cr-Mo alloy balances cost and performance in utility service. Under 7304.51.50.45 for feedwater heaters.