SA-213 TP304 Seamless Alloy Steel Boiler Tube
This seamless tube made from TP304 austenitic stainless alloy steel has an outside diameter of 150 mm and is designed for high-pressure boiler applications. It meets ASME SA-213 specifications for use in superheaters and boilers, ensuring resistance to corrosion and high temperatures. Classified under 7304.59.20.55 due to its circular cross-section, alloy steel composition, and OD between 114.3 mm and 190.5 mm, suitable for boiler service.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If of stainless steel with specific alloy composition
Stainless steel tubes (e.g., 304/316 series) shift to 7304.41 if meeting cold-drawn precision criteria, separate from other alloy steel.
If OD 114.3 mm or less
Size-based classification; smaller diameter tubes fall under different statistical suffix within the same heading.
If imported as part of a complete heat exchanger assembly
If supplied as an integral part of machinery rather than standalone tube, it classifies under the heat exchanger heading as a parts category.
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Import Tips & Compliance
• Verify ASME SA-213 certification and material test reports (MTRs) for compliance; ensure marking includes alloy grade and heat number
• Common pitfall: incorrect OD measurement leading to misclassification
• Obtain end-user certificates if required for pressure vessel applications
Related Products under HTS 7304.59.20.55
P92 Advanced Alloy Boiler Tube
SA-335 P92 9Cr-2W seamless tube, 150 mm OD, for USC boiler walls. Ultra-supercritical service. Classified 7304.59.20.55.
347TP Seamless Superheater Tube
347TP seamless alloy tube, 170 mm OD, ASME-certified for superheater pendants. Niobium-stabilized for weldability. 7304.59.20.55 classification.
P9 9Cr-1Mo Seamless Boiler Tube
SA-335 P9 tube, 125 mm OD, for economizer sections in recovery boilers. High creep rupture strength. Fits 7304.59.20.55 specs.
800HT Superheater Tube
Incoloy 800HT seamless tube, 185 mm OD, for high-temp superheaters. Aged for precipitation hardening. 7304.59.20.55 alloy steel.
TP347HFG Feedwater Tube
TP347HFG fine-grain seamless tube, 135 mm OD, for high-pressure feedwater heaters. Enhanced fatigue resistance. 7304.59.20.55.
SA-213 TP316 Seamless Stainless Boiler Tube
Seamless TP316 alloy steel tube with 165 mm OD, optimized for superheaters in power generation boilers due to superior corrosion resistance in harsh environments. Fabricated from low-carbon stainless alloy for elevated temperature service per ASME standards. Fits 7304.59.20.55 as other alloy steel tube suitable for boilers, with specified diameter range.