Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel: > Other, of circular cross section, of iron or nonalloy steel: > Other > Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters: > Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm
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 7304.39.00.06
Seamless Boiler Tube 250mm OD ASTM A106 Grade B
A seamless carbon steel tube with an outside diameter of 250 mm, designed specifically for high-pressure boiler applications in power plants. It meets ASTM A106 Grade B specifications for elevated temperature service and is suitable for use in boilers and superheaters due to its seamless construction ensuring pressure integrity. Classified under 7304.39.0006 for its circular cross-section, non-alloy steel composition, and OD range of 190.5-285.8 mm.
Superheater Seamless Pipe 220mm OD SA-192
Seamless carbon steel pipe, 220 mm outside diameter, compliant with ASME SA-192 for superheater tubes in steam generators. Engineered for high-temperature steam environments in fossil fuel boilers, resisting oxidation and creep. Fits HTS 7304.39.0006 as non-alloy iron/steel, circular seamless tube for superheaters within the specified OD range.
Heat Exchanger Tube 200mm OD ASTM A179
Cold-drawn seamless carbon steel tube, 200 mm OD per ASTM A179, optimized for condenser and heat exchanger shells in refining processes. Provides excellent heat transfer and corrosion resistance in water-steam cycles. HTS 7304.39.0006 applies due to seamless non-alloy steel, circular profile, and suitability for heat exchangers within 190.5-285.8 mm OD.
Condenser Seamless Pipe 240mm OD API 5L Gr B
Seamless non-alloy steel pipe, 240 mm OD, API 5L Grade B, for steam surface condensers in power generation. Withstands vacuum and corrosive cooling water conditions. Classified in 7304.39.0006 for boiler/condenser applications, iron/non-alloy steel, OD 190.5-285.8 mm.
Refinery Furnace Tube 260mm OD SA-210 Grade A1
Seamless medium-carbon steel tube, 260 mm OD, ASME SA-210 Gr A1 for convection sections in refining furnaces. Handles radiant heat up to 600°C in petrochemical crackers. HTS 7304.39.0006 due to seamless circular non-alloy steel design for refining furnaces, fitting OD specs.
Feedwater Heater Pipe 210mm OD ASTM A334 Grade 1
Seamless carbon steel pipe for feedwater heaters, 210 mm OD, ASTM A334 Gr 1 with low-temp impact properties. Used in closed-loop heating of boiler feedwater in utility plants. Meets 7304.39.0006 as non-alloy seamless tube for feedwater heaters, circular cross-section 190.5-285.8 mm OD.
Boiler Economizer Tube 230mm OD BS 3059 Grade 360
Seamless carbon steel tube to BS 3059 Grade 360, 230 mm OD, for economizer sections preheating boiler feedwater. Enhances efficiency in recovery boilers. HTS 7304.39.0006 for iron/non-alloy seamless pipes suitable for boilers, OD range match.
Pressure Vessel Seamless Tube 270mm OD EN 10216-2 P265GH
EN 10216-2 P265GH seamless tube, 270 mm OD, for high-pressure sections of boiler drums and superheater headers. Normalized condition for weldability in fabrication. Fits 7304.39.0006: non-alloy steel, seamless, circular, boiler-suitable, 190.5-285.8 mm OD.