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.
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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?
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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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