TP347H Seamless Stainless Superheater Tube
High-temperature resistant TP347H seamless stainless steel tube with circular cross-section, optimized for superheaters in fossil fuel boilers. Features enhanced creep strength for prolonged exposure to steam at over 600°C. Falls under 7304.49.0045 for its specific suitability in superheaters and seamless stainless construction.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not specifically suitable for listed high-pressure equipment
General stainless seamless tubes without boiler/superheater suitability go to 7304.49.0050 statistical suffix.
If cross-section exceeds 16mm or non-tubular profile
Chapter note defines 'wire' but larger hollow profiles may shift to Chapter 72 bars/tubes if not qualifying as pipe.
If of alloy steel but not stainless
Non-stainless alloy steel versions for similar uses classify under 7304.39.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide heat treatment records proving stabilization annealing for TP347H grade to support high-temperature end-use classification
• Declare exact dimensions and pressure ratings in entry docs to distinguish from general-purpose tubes
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