SA-335 P11 Seamless Refinery Furnace Tube
1.25Cr-0.5Mo (P11) seamless alloy tube, 130 mm OD, for transfer lines in refining furnaces and crackers. Hot-finished for high-temperature hydrocarbon service with good resistance to sulfidation. Classified in 7304.59.20.55 as other alloy steel seamless pipe suitable for refining furnaces, diameter compliant.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not specifically suitable for high-temp equipment
General alloy steel tubes without boiler/refinery notation classify under other subheadings.
If imported within complete condenser units
Integral parts of condensers classify with the machinery, not separately.
Not sure which classification is right?
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Import Tips & Compliance
• Ensure sulfur content meets refinery specs (<0.005%); provide NDT reports
• Common issue: valuation disputes on heat-treated vs as-rolled condition
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