HS Code 7303 — Cast Iron Tubes, Pipes and Hollow Profiles

This code covers heavy-duty piping and hollow sections manufactured specifically from cast iron. These items are primarily used in underground water main systems, sewage networks, and drainage infrastructure due to their durability and corrosion resistance. Cast iron is brittle compared to steel, making these pipes unsuitable for high-pressure industrial steam applications.

What's included

Centrifugally cast pipes
Ductile iron piping for water mains
Grey iron drainage profiles
Spigot and socket cast iron tubes

What's excluded

Seamless steel tubes → use 7304 (Made from steel rather than cast iron.)
Cast iron pipe fittings → use 7307 (Fittings like elbows or couplings belong in their own category.)

Common examples

Ductile iron sewage pipe
Soil pipe for building drainage
Cast iron culvert section
Main water distribution pipe

Frequently asked questions

What is the difference between 7303 and 7304?

Heading 7303 is strictly for cast iron, whereas 7304 is for seamless tubes made of steel or iron other than cast iron.

Trade & shipping notes

Typical duty range: 0% - 15%
Documentation: Certificates of conformity are often required for municipal water system infrastructure.
Typical shipping mode: FCL
Top exporters: China, India, France, Germany
Top importers: United States, Saudi Arabia, United Arab Emirates, United Kingdom

Key takeaway

Exclusively for cast iron; used predominantly in low-pressure water and waste infrastructure.

Cast Iron Tubes, Pipes and Hollow Profiles