Seamless Steel Hydraulic Tubing
Thin-walled seamless tubes of nonalloy steel used in hydraulic systems for machinery and equipment. These pipes have a wall thickness under 4 mm and are classified under HTS 7304.90.50.00 due to their seamless construction from iron or nonalloy steel, distinguishing them from welded pipes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded rather than seamless
Welded tubes of nonalloy steel with wall under 4mm fall under Chapter 73 heading for welded pipes.
If made of alloy steel
Alloy steel composition shifts classification to other seamless steel tubes in 7304.19.
If imported as parts of hydraulic systems
If specifically for hydraulic equipment use, may classify as machinery parts rather than generic tubes.
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 seamless production method via mill test certificates to avoid misclassification as welded pipes under 7306
• Ensure wall thickness documentation is precise, as 4mm threshold separates from thicker HTS 7304.90.30.00
• Label with exact steel composition to confirm nonalloy status and prevent alloy steel duties under 7304.19
Related Products under HTS 7304.90.50.00
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.
Seamless Steel Medical Gas Pipes
Thin-walled seamless nonalloy steel pipes (<4 mm) certified for medical oxygen and gas delivery systems. HTS 7304.90.50.00 covers these clean, seamless tubes of iron/nonalloy steel.
Precision Seamless Steel Instrument Tubing
High-precision seamless tubes of nonalloy steel with wall thickness under 4 mm, used for instrumentation and control lines in industrial applications. Fits HTS 7304.90.50.00 for seamless, thin-walled iron/nonalloy steel pipes.
Automotive Seamless Steel Brake Lines
Seamless nonalloy steel tubes with thin walls (<4 mm) for hydraulic brake systems in vehicles. Classified in HTS 7304.90.50.00 as seamless pipes of iron/nonalloy steel, not as vehicle parts.
Industrial Seamless Steel Condenser Tubes
Thin-walled seamless pipes of nonalloy steel (<4 mm wall) for heat exchanger condensers in power plants. HTS 7304.90.50.00 applies to these seamless hollow profiles of iron/nonalloy steel.
Nonalloy Steel Furniture Frame Tubes
Seamless thin-walled tubes (<4 mm) of nonalloy steel used in metal furniture construction like chair and table legs. HTS 7304.90.50.00 covers these as seamless pipes suitable for structural hollow profiles.