SA-213 TP304 Seamless Boiler Tube
Seamless tube made from TP304 austenitic stainless steel alloy, with an outside diameter of 355.6 mm (14 inches), designed specifically for high-pressure boiler applications. It falls under HTS 7304.59.20.70 due to its seamless construction, circular cross-section, alloy steel composition, and suitability for use in boilers, with OD between 285.8 mm and 406.4 mm.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of stainless steel
Stainless steel variants (e.g., TP304/TP316) shift to 7304.31 for cold-drawn stainless tubes suitable for boilers, differing from other alloy steel.
If welded instead of seamless
Welded construction moves to Chapter 73 heading 7306 for alloy steel pipes suitable for boilers, as seamlessness defines the 7304 classification.
If imported as part of a complete heat exchanger assembly
When supplied as an integral component of a machinery assembly like a heat exchanger, it may classify under parts of heat exchange machinery rather than standalone tubes.
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Import Tips & Compliance
• Obtain material test reports (MTRs) certifying alloy composition and seamless production to avoid misclassification as welded; ensure marking complies with ASME SA-213 standards; declare exact OD measurement to fit the 285.8-406.4 mm subheading
Related Products under HTS 7304.59.20.70
P91 Feedwater Heater Seamless Pipe
P91 modified martensitic alloy seamless tube, 324.9 mm OD for feedwater heaters. Classified HTS 7304.59.20.70 for feedwater heater use, alloy steel, seamless, OD compliant.
SA-335 P11 Seamless Superheater Tube
Seamless low-alloy steel tube grade P11 (1.25% chromium, 0.5% molybdenum) with 12-inch (304.8 mm) OD, engineered for superheaters in power generation boilers. Classified under HTS 7304.59.20.70 for its alloy steel makeup, boiler suitability, and specified diameter range.
SA-213 TP316L Heat Exchanger Tube
Low-carbon TP316L stainless alloy seamless tube, 15-inch (381 mm) OD, optimized for heat exchangers and condensers in chemical processing plants. It meets HTS 7304.59.20.70 criteria as other alloy steel, seamless, circular, for heat exchangers, within the 285.8-406.4 mm OD range.
SA-335 P22 Feedwater Heater Tube
High-temperature P22 alloy steel (2.25% Cr, 1% Mo) seamless tube, 13.5-inch (342.9 mm) OD, for feedwater heaters in steam cycles. Fits HTS 7304.59.20.70 as seamless other alloy steel tube for feedwater heaters, OD 285.8-406.4 mm.
SA-213 T9 Condenser Alloy Tube
T9 grade (9% chromium) seamless alloy steel tube with 11.5-inch (292.1 mm) OD for condensers in fossil fuel plants. HTS 7304.59.20.70 applies for its seamless, circular, condenser-suited design in other alloy steel, precise OD range.
P5 Alloy Seamless Refining Furnace Tube
ASME SA-335 P5 (5% Cr, 0.5% Mo) seamless tube, 14-inch (355.6 mm) OD, for refining furnace tubing in petrochemical refineries. Classified in HTS 7304.59.20.70 for refining furnace suitability, alloy steel, seamless, 285.8-406.4 mm OD.