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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If exceeding 285.8 mm diameter
Larger diameter seamless alloy tubes have separate provisions beyond the 190.5-285.8 mm statistical band.
If cold-formed from welded parent pipe
Cold-finished welded pipes classify differently from true seamless products in heading 7304 structure.
If imported in heat exchanger tube bundles
Assembled tube bundles with fins/baffles become complete heat exchanger parts under Chapter 84.
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Import Tips & Compliance
• Submit engineering drawings showing boiler application; ensure traceability markings per ASME code; pitfall: incorrect alloy content declaration causing shift to carbon steel 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.
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.
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.
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.