Square Tube HS Code (730661): SHS & RHS Customs Classification

1. What Is the HS Code for Square Tube?

Welded carbon steel square tubes are commonly classified under HS Code 730661, a subheading of HS Code 7306 covering welded tubes and hollow sections of iron or steel. More specifically, welded square hollow sections (SHS) and rectangular hollow sections (RHS) are commonly declared under HS Code 730661 in international trade.

The exact tariff code may vary depending on factors such as material, manufacturing method, and the customs requirements of the importing country. Before customs declaration, importers should always verify the applicable code using the local tariff schedule.

2. Square Tube HS Code List

The following table summarizes the HS codes commonly used for square steel tubes, rectangular hollow sections, and related welded hollow structural sections.

Note: HS Code 730661 generally applies to welded square and rectangular hollow sections of non-alloy steel. Some countries may use additional tariff digits (such as 73066100 or 73066190) for customs declaration and statistical purposes.

3. Customs Documents Required for Square Tube Imports & Exports

Selecting the correct HS code is only the first step when importing or exporting square tubes. Customs authorities usually require supporting documents to verify the product description, material, and specifications.

Keep the product description consistent across the commercial invoice, packing list, and mill test certificate. Inconsistent descriptions may result in additional customs review or clearance delays.

4. Common Classification Mistakes

The following mistakes may lead to customs queries or incorrect HS code declarations.

4.1 Using a Generic Product Name

Use "Square Hollow Section (SHS)" or "Carbon Steel Square Tube" instead of simply "Steel Tube".

4.2 Inconsistent Product Descriptions

Keep the product description consistent across the invoice, packing list, and mill test certificate (MTC).

4.3 Using an Outdated Tariff Code

Always verify the latest tariff code required by the destination country's customs authority.

4.4 Using a Seamless Pipe HS Code for Welded Square Tube

Welded square tubes and seamless tubes are classified under different HS headings.

5. FAQs

Q1. What is the HS code for square hollow section (SHS)?

Square Hollow Section (SHS) is commonly classified under HS Code 730661 when it is a welded non-alloy steel hollow section.

Q2. Is the HS code based on tube size or wall thickness?

No. Tube size and wall thickness do not affect the six-digit HS Code. Classification is mainly based on the manufacturing method and product category.

Q3. Can the same square tube use different tariff codes in different countries?

Yes. The first six digits of the HS Code are internationally standardized, while many countries add national tariff digits for customs purposes.

Q4. What documents are usually required when declaring square tube?

Commercial Invoice, Packing List, Mill Test Certificate (MTC), Product Specification, and Certificate of Origin (if required).

Q5. Does HS Code 730661 include galvanized square tube?

Yes. Galvanized square tubes are generally classified under the same HS heading unless the destination country's tariff schedule specifies otherwise.

Related HS Code Guides

1. Pipe HS Code List: Seamless Pipe, Steel Tube and Welded Pipe Codes 

2. ERW Pipe HSN Code (7306) 

3. Mild Steel Pipe HS Code List

4. Hydraulic Tube HS Code

5. HS Code for Precision Tube

6. OCTG Pipe Import / Export Guide