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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not specifically boiler-suited
Lack of certification for boiler/heat exchanger use drops to general other alloy steel tubes in 7304.29.
If welded construction
Welded P22 tubes for similar uses classify under welded alloy steel pipes in 7306.40.
If as parts for steam/ vapor generating boilers
If imported expressly as boiler parts rather than tubes, may fall under boiler parts heading 8402.90.
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Import Tips & Compliance
• Certify minimum wall thickness and yield strength per SA-335; declare end-use in feedwater systems to affirm suitability; pitfall: incorrect alloy declaration leading to 7304.19 carbon steel rate
Related Products under HTS 7304.59.20.70
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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.
SA-335 P11 Seamless Superheater Tube
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