Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel: > Other, of circular cross section, of other alloy steel: > Other: > Other: > Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters
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
Subheadings
Products classified under HTS 7304.59.20
Seamless Alloy Steel Boiler Tube SA-213 TP304
This seamless tube made from TP304 stainless alloy steel is designed specifically for high-pressure boilers and superheaters, meeting ASME SA-213 specifications. It features a circular cross-section and is cold-drawn for superior strength and corrosion resistance in elevated temperature environments. Classified under 7304.59.20 due to its seamless construction from alloy steel and suitability for boiler applications.
T304 Stainless Condenser Tube for Feedwater Heaters
These seamless T304 stainless tubes serve in condenser units and feedwater heaters of steam turbines, providing corrosion resistance in moist, high-pressure conditions. Circular cross-section design optimizes fluid flow in power generation systems. Classified in 7304.59.20 for alloy steel seamless tubes suitable for condensers.
SA-213 TP347H Superheater Tube
TP347H stabilized stainless seamless tubes for superheaters in utility boilers, resisting intergranular corrosion after welding. Heavy wall construction handles 600°C+ steam conditions. Under 7304.59.20 for alloy steel tubes in superheaters.
2.25Cr-1Mo Boiler Feedwater Heater Tube
Seamless 2.25% chromium-1% molybdenum tubes for economizers and feedwater heaters in coal-fired boilers. Provides oxidation resistance up to 600°C. 7304.59.20 classification for feedwater heater suitability.
Alloy 625 Condenser Repair Tube
Inconel Alloy 625 seamless tubes for condenser tube sheet repairs in nuclear and fossil plants. Exceptional corrosion resistance in chloride environments. 7304.59.20 for condenser applications.
P5 Alloy Steel Refinery Furnace Tube
SA-335 P5 (5Cr-0.5Mo) seamless tubes for hydrogen reformers and cracking furnaces. Seamless design essential for high-purity hydrogen service. Fits 7304.59.20 refining furnace criteria.
Hastelloy C-276 Seamless Heat Exchanger Tube
Hastelloy C-276 seamless tubes excel in corrosive heat exchanger service for chemical processing and refining condensers. The nickel-chromium-molybdenum alloy provides unmatched resistance in harsh environments. Fits 7304.59.20 as other alloy steel seamless tubes for heat exchangers.
Incoloy 800 Heat Exchanger Tube
Incoloy 800 seamless tubes are precision-engineered for heat exchangers in petrochemical plants, offering exceptional resistance to oxidation and carburization. These circular cross-section pipes withstand high temperatures in condenser and feedwater heater systems. Falls under 7304.59.20 as seamless alloy steel tubes suitable for heat exchangers per official descriptions.
ASME SA-335 P11 Seamless Superheater Tube
SA-335 P11 grade seamless alloy steel tubes are used in fossil fuel power plant superheaters for steam generation at extreme temperatures. The 1.25% chromium-molybdenum composition ensures creep resistance in boiler environments. Qualifies for 7304.59.20 as seamless, circular alloy steel tubes for superheaters.
P91 Alloy Steel Tube for Refining Furnace
Grade P91 (9Cr-1Mo-V) seamless tubes are engineered for cracking furnaces in oil refineries, enduring severe thermal cycling and carburizing atmospheres. Their circular seamless construction supports high-pressure hydrocarbon processing. Meets 7304.59.20 for tubes suitable for refining furnaces.