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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If below 190.5 mm diameter
Diameter thresholds dictate statistical breaks within 7304 seamless alloy provisions, shifting to smaller OD categories.
If threaded or with fittings attached
Tubes fitted with fittings or threaded at ends become tube/pipe fittings under heading 7307, not bare tubes.
If as parts of steam/ vapor generating boilers
When imported specifically as boiler subassembly components rather than stock tubes, they may enter under boiler parts in Chapter 84.
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Import Tips & Compliance
• Include hydrostatic test certificates and non-destructive electric test reports as required for pressure tubing; label with precise alloy grade and dimensions; common error is failing to differentiate from carbon steel equivalents in 7304.31
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.
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.