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 stainless steel: > Cold-drawn or cold-rolled (cold-reduced): > Of an external diameter of less than 19 mm > 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
Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)
Products classified under HTS 7304.41.30.15
ASTM A312 TP316Ti Boiler Service Tube
Cold-drawn seamless TP316Ti tube per ASTM A312, 11 mm OD, titanium-stabilized for welded boiler components resisting pitting in chloride environments. Designed for economizer and boiler wall tubes. 7304.41.30.15 due to cold-forming, stainless, small OD, boiler use.
Incoloy 800H Heat Exchanger U-Tube
Cold-rolled seamless Incoloy 800H tube, 17.5 mm OD, U-bent for tubular heat exchangers in nitric acid plants. Nickel-iron-chromium alloy for high-temperature corrosion resistance. Classifies 7304.41.30.15 despite trade name, as stainless-equivalent for heat exchangers.
Duplex 2205 Stainless Condenser Service Tube
Cold-drawn duplex 2205 (UNS S31803) seamless tube, 14.5 mm OD, for seawater-cooled condensers due to superior pitting resistance. Ferritic-austenitic structure for high strength. 7304.41.30.15: cold stainless tube <19 mm for condensers.
Cold-Formed 253MA Stainless Furnace Tube
Seamless cold-formed 253MA high-temperature stainless tube, 12 mm OD, for pyrolysis furnace coils in ethylene production. Rare earth stabilized for oxidation resistance over 1100°C. Meets all 7304.41.30.15 criteria for refining furnaces.
Cold-Drawn 316L Stainless Steel Boiler Tube
Seamless cold-drawn tube made from 316L stainless steel with an external diameter of 14 mm, specifically designed for high-pressure steam boilers in industrial applications. Its corrosion resistance and strength make it ideal for withstanding extreme temperatures and pressures in boiler systems. Classified under 7304.41.30.15 due to its seamless construction, cold-drawn process, small diameter, and suitability for boilers.
Cold-Rolled 304 Stainless Steel Superheater Tube
Seamless cold-rolled tube of 304 stainless steel, 12.7 mm OD, engineered for superheater sections in power plant boilers to handle superheated steam. The material's oxidation resistance at high temperatures qualifies it for this critical application. Falls under 7304.41.30.15 for its seamless, cold-formed nature, circular cross-section under 19 mm, and superheater suitability.
Seamless 310S Stainless Steel Heat Exchanger Tube
Cold-drawn seamless tube in 310S stainless steel, external diameter 15 mm, optimized for shell-and-tube heat exchangers in chemical processing plants. High chromium content provides excellent resistance to carburization and thermal fatigue. Meets 7304.41.30.15 criteria: stainless steel, cold-formed, <19 mm OD, designated for heat exchangers.
Cold-Drawn 321 Stainless Steel Condenser Tube
Seamless cold-drawn 321 stainless steel tube, 16 mm OD, for use in surface condensers of steam turbines where resistance to intergranular corrosion is essential. Stabilized with titanium for weldability in condenser fabrication. Classified in 7304.41.30.15 for seamless stainless, cold-reduced, small diameter, condenser application.
TP347H Stainless Steel Refining Furnace Tube
Cold-rolled seamless TP347H stainless tube, 18 mm OD, for transfer lines in petroleum refining furnaces, offering creep strength at elevated temperatures. Niobium-stabilized grade resists sensitization. Fits 7304.41.30.15: cold-formed stainless, circular <19 mm, for refining furnaces.
Cold-Reduced 17-4PH Stainless Feedwater Heater Tube
Seamless cold-reduced 17-4PH precipitation-hardening stainless tube, 13 mm OD, for feedwater heaters in thermal power plants to preheat boiler feedwater. Provides high yield strength and corrosion resistance in wet steam environments. Under 7304.41.30.15 for its specs and feedwater heater suitability.