Seamless Boiler Tube ASTM A106 Grade B
This seamless carbon steel tube is designed for high-pressure boiler applications, featuring an outside diameter over 285.8 mm and circular cross-section. It falls under HTS 7304.39.0008 due to its seamless construction from non-alloy steel, suitability for boilers, and large diameter exceeding 11.25 inches. Commonly used in power plants for steam generation.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If outside diameter 114.3 mm or less
Smaller diameter seamless tubes for boilers shift to different statistical suffix in the same heading for precise sizing.
If welded rather than seamless
Welded pipes suitable for boilers use Chapter 73 heading 7306, as seamlessness defines the 7304 classification.
If made of alloy steel instead of non-alloy
Alloy steel composition (e.g., chromium-molybdenum) moves it to 7304.59 subheading from non-alloy steel provisions.
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
• Verify mill test certificates confirming seamless production and chemical composition per ASTM A106 to avoid misclassification as welded
• Ensure documentation proves suitability for boilers via engineering specs; common pitfall is lacking pressure rating proof
• Label with exact OD measurement and steel grade for customs; oversized shipments may trigger additional handling fees
Related Products under HTS 7304.39.00.08
Refinery Cracking Furnace Tube
Large seamless non-alloy tube for ethylene cracking furnaces, OD >285.8 mm. HTS 7304.39.0008 via refining furnace provision.
Boiler Economizer Seamless Tube
Seamless tube >285.8 mm for boiler economizers (feedwater heaters). Matches 7304.39.0008 specs fully.
Steel Superheater Coils Pipe
Straight seamless non-alloy pipe >285.8 mm OD for superheater coils. 7304.39.0008 classification.
Large Diameter Superheater Tube SA-213 T11
Seamless tube from non-alloy steel for superheaters in industrial boilers, with OD exceeding 285.8 mm. Classified under 7304.39.0008 for its circular cross-section, seamless iron/non-alloy steel makeup, and explicit suitability for superheaters. Ideal for high-temperature steam applications in energy production.
Heat Exchanger Seamless Pipe API 5L X52
High-strength seamless non-alloy steel pipe with OD over 285.8 mm, engineered for heat exchangers in refining processes. Meets HTS 7304.39.0008 criteria: seamless, circular, iron/non-alloy steel, and suitable for heat exchangers/condensers. Used in petrochemical plants for efficient heat transfer.
Condenser Tube for Feedwater Heaters
Seamless carbon steel tube exceeding 285.8 mm OD, optimized for condensers and feedwater heaters in power generation. Fits 7304.39.0008 as a large-diameter, circular cross-section seamless product of non-alloy steel designated for those specific thermal applications.