Pipe HS Code List: Seamless Steel Pipe Codes (HS 7304)

Pipe products are classified under different HS headings according to their material, manufacturing method, cross-sectional shape, and product type. This guide covers the main pipe classifications under headings 7303–7307, with a detailed focus on HS 7304 for seamless steel pipes.

1. Pipe HS Code Quick Reference

The first six digits follow the international HS classification, while additional digits may apply under national tariff schedules.

2. HS Code 7304 for Seamless Steel Pipes

HS heading 7304 covers seamless tubes, pipes, and hollow profiles of iron (other than cast iron) or steel. Its six-digit subheadings classify line pipe, drill pipe, and casing and tubing by end use and steel type, while other circular pipes are classified by steel type and processing condition.

Subheadings 730411–730429 classify line pipe, drill pipe, and casing and tubing by end use and steel type. Other seamless circular pipes fall under 730431–730459, classified by steel type and processing condition, while 730490 covers other products under heading 7304, including non-circular seamless hollow profiles.

3. How to Determine the HS Code for Seamless Steel Pipes

For seamless pipes under heading 7304, the applicable subheading is determined in the following order:

Identify the end use. Line pipe for oil or gas pipelines, drill pipe for oil or gas drilling, and casing and tubing for oil or gas drilling have dedicated subheadings listed in the table above.

Identify the steel type. For other seamless circular pipes, determine whether the material is non-alloy steel, stainless steel, or other alloy steel.

Check the processing condition. Within each steel category, distinguish cold-drawn or cold-rolled products from other products. Seamless products not covered by the preceding subheadings fall under 730490, including non-circular hollow profiles.

Within 730431–730459, non-alloy steel is classified under 730431 or 730439, stainless steel under 730441 or 730449, and other alloy steel under 730451 or 730459. The lower code in each pair applies to cold-drawn or cold-rolled products.

The first six digits follow the internationally harmonized HS nomenclature. National tariff schedules may add further digits and product-specific distinctions.

4. Country-Specific Tariff Codes for Seamless Steel Pipes

National tariff schedules extend the six-digit HS subheadings into country-specific codes. The following examples show how India and the United States further classify seamless steel pipes.

4.1 India: 8-Digit ITC (HS) Codes

India uses eight-digit ITC (HS) codes for import and export classification. Under heading 7304, the national tariff items provide further distinctions within several six-digit subheadings.

For subheadings 730431 and 730439, India uses three outside diameter ranges: up to 114.3 mm, above 114.3 mm up to 219.1 mm, and above 219.1 mm. Each range is split into "of iron" and other items. Subheadings 730451 and 730459 use the same diameter ranges for other alloy steel pipes.

4.2 United States: HTSUS Codes

The United States uses the Harmonized Tariff Schedule of the United States (HTSUS), which extends the international HS classification into ten-digit reporting numbers: an eight-digit tariff number followed by a two-digit statistical suffix.

For example, 7304.19.10 covers other line pipe of iron or nonalloy steel. Its statistical suffixes distinguish products by outside diameter and, for certain diameter ranges, wall thickness. Under 7304.31, cold-drawn or cold-rolled products are further divided into 7304.31.30 for hollow bars and 7304.31.60 for other products. Subheading 7304.39.00 covers other products that are not cold-drawn or cold-rolled.

5. Frequently Asked Questions

Q1. What is the HS code for seamless steel pipe?

Seamless steel pipes are generally classified under HS heading 7304. The specific six-digit subheading depends on the pipe type, material, and processing condition.

Q2. What is the difference between HS 7304 and 7306?

HS 7304 covers seamless tubes, pipes, and hollow profiles of iron (other than cast iron) or steel. HS 7306 covers other tubes, pipes, and hollow profiles not classified under 7304 or 7305, including welded and open-seam products.

Q3. Does the HS code of a seamless steel pipe vary by application?

Yes. Line pipe, drill pipe, and casing and tubing have separate subheadings under 7304; other circular pipes follow material and processing condition, and non-circular profiles go to 730490.

Q4. Do pipe diameter and wall thickness affect the HS code?

For seamless pipes under heading 7304, the six-digit code is generally based on product type, steel type, and processing condition. National tariff codes may further distinguish outside diameter and wall thickness, while non-seamless circular pipes with an OD over 406.4 mm fall under 7305.

Read more: Seamless Steel Pipe Sizes or Mild Steel Pipe HS Code List