Structural Seamless Steel Tube 18mm OD
Schedule 40 seamless carbon steel pipe sized tube (18mm OD) for structural frameworks and supports. Classifies in HTS 7304.39.0020 as other seamless nonalloy steel tubes under 38.1mm OD, suitable for welding and mechanical connections. ASTM A53 Grade B equivalent.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If precision structural tubes
Tubes with machined ends or close tolerances for pin connections are precision.
If galvanized structural tubing
Hot-dip zinc coated tubes classify under coated welded tubes.
If threaded structural tubes
Factory threaded and coupled tubes become pipe fittings.
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Import Tips & Compliance
• Wall thickness schedule designation (STD, XS, XXS) must match declared dimensions
• Confirm black phosphate or bare finish; galvanized changes to coated steel classification
• Length documentation prevents 'in coils' misdeclaration
Related Products under HTS 7304.39.00.20
Seamless Carbon Steel Hydraulic Tubing 25mm OD
This seamless tube of nonalloy steel has a 25mm outside diameter and is precision-drawn for high-pressure hydraulic systems in machinery. It falls under HTS 7304.39.0020 as a seamless tube of iron or nonalloy steel with circular cross section and OD less than 38.1mm, not suitable for drilling or threading. Commonly used in industrial fluid power applications.
Nonalloy Steel Boiler Tube 30mm OD
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SAE 1020 Seamless Mechanical Tubing 20mm OD
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