Nonalloy Steel Boiler Flue Pipes
Seamless thin-walled pipes of iron or nonalloy steel designed for conveying hot gases in boiler systems. Wall thickness less than 4 mm qualifies them for HTS 7304.90.50.00 as seamless hollow profiles of nonalloy steel.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If wall thickness 4mm or greater
Thicker-walled seamless pipes of nonalloy steel move to 7304.90.30.00 subheading.
If when imported with mechanical fittings as a set
Tube or pipe fittings of iron/nonalloy steel classify separately if combined for assembly.
If for use exclusively in steam boilers
Parts specifically for boilers may fall under Chapter 84 as boiler components.
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Import Tips & Compliance
• Provide pressure test reports confirming suitability for high-temperature use without reclassifying as line pipe
• Declare exact outer diameter and wall thickness to match statistical suffixes accurately
• Avoid bundling with fittings, as sets may classify under 7307 for tube fittings
Related Products under HTS 7304.90.50.00
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