Cold-Drawn Alloy Steel Superheater Riser Tube
Cold-drawn seamless riser tube of 2.25Cr-1Mo alloy steel for connecting superheater sections in utility boilers. Provides reliable high-pressure steam flow with oxidation resistance. Classified 7304.51.50.45 for superheaters.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If certain carbon-moly alloys
Lower alloy content shifts to specific alloy sub-provisions.
If cold-formed but not superheater suitable
End-use certification differentiates specialized from general tubes.
If flanged or swaged ends added
Mechanical fittings transform classification to tube/pipe fittings.
Not sure which classification is right?
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Import Tips & Compliance
• Specify riser tube geometry (length, bends) in commercial invoices accurately
• Include impact testing results for low-temperature ductility
• Avoid generic descriptions; use 'superheater riser' to match tariff language
Related Products under HTS 7304.51.50.45
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Cold-Drawn Superheater Tube ASTM A335 P11
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Cold-Reduced Condenser Tube SA-213 TP321
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Cold-Drawn Feedwater Heater Tube ASTM A213 T22
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