Mild Steel Pipe HS Code List (7304, 7305, 7306 & 7307)

2. How Is the HS Code Determined?

A mild steel pipe is not classified by material alone. Customs authorities determine the HS code based on the product's manufacturing method, cross-sectional shape, product type, and intended application. These factors determine whether the product is classified as seamless pipe, welded pipe, pipe fittings, or structural sections.

2.1 Manufacturing Method

Manufacturing method is one of the primary classification criteria.

In most cases, seamless steel pipe is classified under HS heading 7304, while welded steel pipe falls under HS heading 7306.

2.2 Cross-Sectional Shape

The cross-sectional shape may also affect tariff classification.

Round pipe, square hollow section (SHS), rectangular hollow section (RHS), and other hollow profiles can be assigned different tariff subheadings depending on the customs tariff schedule used by each country.

2.3 Material

Material is another classification factor.

Although this guide focuses on mild steel pipe, customs authorities distinguish between carbon steel, stainless steel, alloy steel, and other ferrous products when assigning detailed tariff codes.

2.4 Product Type and Intended Application

The product itself is equally important for HS classification.

For example, steel pipe, pipe fittings, and structural steel sections are classified under different HS headings even when manufactured from the same material.

Pipe fittings such as elbows, tees, reducers, and couplings are classified under HS heading 7307.

3. International HS Codes vs. Country-Specific Tariff Codes

The first six digits of an HS code are standardized worldwide by the World Customs Organization (WCO) and are used by customs authorities in international trade.

Many countries extend these international headings to 8-digit, 10-digit, or longer national tariff codes for customs administration, duty assessment, trade statistics, and regulatory requirements.

Always verify the complete tariff code required by the customs authority of the destination country before declaring goods.

4. Common HS Headings for Mild Steel Pipe

Steel pipe products are primarily classified under HS headings 7304, 7306, and 7307. The applicable heading depends on the manufacturing method and product type.

4.1 HS Heading 7304 – Seamless Steel Pipe

HS heading 7304 covers seamless tubes, pipes, and hollow profiles made of iron or steel.

4.2 HS Heading 7306 – Welded Steel Pipe

HS heading 7306 covers welded tubes, pipes, and hollow profiles, including ERW, LSAW, SSAW, square hollow sections (SHS), and rectangular hollow sections (RHS). Galvanized welded pipe is generally classified under the same heading.

4.3 HS Heading 7307 – Steel Pipe Fittings

HS heading 7307 covers iron or steel pipe fittings used for joining or connecting piping systems.

5. Common HS Code Classification Mistakes

Incorrect HS code declarations can result in customs inspections, duty reassessments, and clearance delays. Most classification errors occur because the product itself is incorrectly identified—for example, declaring a pipe fitting as steel pipe or confusing welded pipe with seamless pipe.

6. HS Code Selection Checklist

Before declaring a mild steel pipe under an HS code, confirm the following product information.

✓ Manufacturing method (Seamless or Welded)

✓ Product type (Pipe, Pipe Fitting, or Structural Steel)

✓ Material (Carbon Steel, Stainless Steel, Alloy Steel, etc.)

✓ Cross-sectional shape (Round, Square, Rectangular, or Other)

✓ Product application (Line Pipe, Structural Use, Mechanical Tube, etc.)

✓ Destination country and applicable national tariff schedule

If any specification is unclear, verify it using the product specification, the Mill Test Certificate (MTC), or the destination country's customs tariff schedule before declaration.

7. FAQs

Q1. What is the HS code for steel pipe?

The HS code depends on the type of steel pipe. In general, HS heading 7304 is used for seamless steel pipe, 7306 for welded steel pipe, 7307 for steel pipe fittings, and 7308 for structural steel products. Always verify the complete tariff code required by the destination country's customs authority.

Q2. What is the HS code for welded steel pipe?

Welded steel pipe is generally classified under HS heading 7306. This heading includes ERW pipe, LSAW pipe, SSAW pipe, galvanized steel pipe, and welded hollow sections. The complete tariff code may vary by country.

Q3. What is the HS code for seamless steel pipe?

Seamless steel pipe is generally classified under HS heading 7304. Common subheadings include 730419, 730431, 730439, and 730490, depending on the product specification and intended application.

Q4. What is the HS code for steel pipe fittings?

Steel pipe fittings, including elbows, tees, reducers, couplings, unions, and nipples, are generally classified under HS heading 7307. The detailed tariff code depends on the fitting type and the customs requirements of the destination country.

Q5. What is the difference between HS code 7304 and 7306?

The main difference is the manufacturing method. HS heading 7304 covers seamless steel pipe, while HS heading 7306 covers welded steel pipe. The applicable subheading is determined by the product specification and national tariff schedule.

Related Reading

Pipe HS Code List

ERW Pipe HSN Code

Seamless Pipe HS Code

Mild Steel Pipe Standards

Difference Between Mild Steel Pipe and Carbon Steel Pipe