Alloy Steel T/P92 Superheater Tube
Seamless Grade T/P92 ferritic/martensitic alloy steel tube, 220 mm OD, engineered for superheaters in ultra-supercritical boilers to handle temperatures over 600°C. Classified in 7304.59.20.60 for its alloy steel makeup, seamless circular profile, and explicit design for superheaters within the 190.5-285.8 mm diameter band.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If of cold-drawn construction
Cold-drawn seamless tubes have separate statistical suffixes from hot-finished ones, affecting duty even within the same diameter and alloy provisions.
If welded rather than seamless
Welded alloy steel tubes for boiler applications classify in heading 7306, as seamlessness is a defining criterion for Chapter 73 heading 7304.
If for use in chemical processing equipment
Tubes designed primarily for refining furnaces or condensers in chemical machinery may classify as parts of unspecified machines under Chapter 84.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide mill test reports (MTRs) detailing chemical composition and mechanical properties per ASTM A335 P92; declare exact OD measurements with caliper certifications; avoid common pitfall of misstating end-use leading to higher general-duty rates
Related Products under HTS 7304.59.20.60
SA-213 TP347H Seamless Boiler Tube
Seamless tube made from TP347H stabilized austenitic stainless steel alloy, with an outside diameter of 250 mm, designed specifically for high-temperature superheaters in industrial boilers. It falls under HTS 7304.59.20.60 due to its seamless construction, circular cross-section, alloy steel composition, and suitability for superheaters with the specified diameter range. These tubes withstand extreme pressures and temperatures in power generation.
15CrMoG Seamless Heat Exchanger Tube
Seamless 15CrMoG alloy steel tube with 200 mm outside diameter, suitable for heat exchangers in refining furnaces and feedwater heaters. It meets HTS 7304.59.20.60 criteria as other alloy steel (non-stainless), circular seamless profile in the 190.5-285.8 mm range, optimized for high-pressure heat transfer applications.
SA-335 P11 Boiler Feedwater Tube
ASME SA-335 Grade P11 low-alloy steel seamless tube, 240 mm OD, for feedwater heaters in power plant boilers. Fits 7304.59.20.60 as other alloy steel seamless tube of circular section suitable for feedwater heaters in the designated large diameter range.
9Cr1MoVNb Condenser Tube
High-strength 9Cr1MoVNb modified alloy steel seamless tube, 195 mm OD, for steam condensers in thermal power stations. Classified under 7304.59.20.60 for its suitability in condensers, alloy composition, and diameter specs.