HS Code for Seamless steel tubes

Seamless steel tubes classified under HS code 7304.39 are defined by their manufacturing process and material composition. This code specifically covers tubes, pipes, and hollow profiles made of iron or non-alloy steel. The classification is determined by General Interpretative Rule (GRI) 1, which looks at the heading 7304 for seamless articles of iron or steel. Subheading 7304.39 is reserved for products that have not undergone a cold-drawing or cold-rolling process, typically referred to as hot-finished or hot-rolled tubes. These products must have a circular cross-section to qualify. The absence of a longitudinal or spiral weld distinguishes these from products in headings 7305 or 7306. Non-alloy steel is defined in the Chapter 72 notes based on specific weight percentages of elements like manganese, silicon, and copper. Because these tubes are hot-finished, they generally possess thicker walls and a less precise surface finish compared to their cold-processed counterparts, making them suitable for high-pressure applications in structural, mechanical, and industrial piping systems where the precision of cold-finishing is not required.

Products Included

• Hot-rolled seamless carbon steel pipes
• Hot-finished non-alloy steel hollow profiles
• Seamless structural steel tubing (hot-finished)
• Heavy-wall seamless mechanical tubing
• Hot-finished boiler tubes of non-alloy steel

Common Misclassification

This code is frequently confused with HS code 7304.31, which covers seamless tubes of iron or non-alloy steel that are cold-drawn or cold-rolled. The distinction lies entirely in the secondary manufacturing stage; cold-processed tubes have tighter tolerances and are classified under .31. Additionally, if the tube is made of stainless steel, it must be moved to subheadings 7304.41 or 7304.49. If the tube has a non-circular cross-section, such as square or rectangular, it may fall under 7304.90. Finally, if the outer diameter exceeds 406.4 mm and the tube is welded, it belongs in heading 7305.

FAQ

What is the HS code for seamless steel tubes?

The HS code for hot-finished seamless tubes of iron or non-alloy steel with a circular cross-section is 7304.39.

How does 7304.39 differ from 7304.31?

HS code 7304.31 is specifically for tubes that have been cold-drawn or cold-rolled to achieve precise dimensions, whereas 7304.39 is for hot-finished tubes.