Heading 7304
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel
139 declarable lines
Heading 7304 covers seamless (not welded) tubes, pipes and hollow profiles made of iron or steel other than cast iron. The heading is split first by use: line pipe for oil or gas pipelines, casing, tubing and drill pipe for oil or gas drilling, and all other tubes and pipes of circular cross section. Within each group the lines divide by material (stainless steel, iron or nonalloy steel, other alloy steel), then by outside diameter and wall thickness, and for the residual group by cold-drawn versus other and by end use such as boiler tubes.
Products in this heading
- Seamless stainless steel line pipe for oil or gas pipelines
- Seamless drill pipe used in oil or gas drilling
- Seamless casing and tubing for oil or gas wells
- Seamless boiler and heat exchanger tubes of nonalloy steel
- Cold-drawn seamless hollow bars of nonalloy steel
- Seamless alloy steel tubes for ball or roller bearing manufacture
- Galvanized seamless nonalloy steel pipe with outside diameter not exceeding 114.3 mm
- Seamless stainless steel tubing with outside diameter not exceeding 114.3 mm
How to choose the right subheading
- End use: line pipe for pipelines, casing, tubing or drill pipe for oil and gas drilling, or other tube and pipe.
- Material: stainless steel, iron or nonalloy steel, or other alloy steel.
- Outside diameter, which drives most of the break lines within a material group.
- Wall thickness, which splits many diameter ranges into separate lines.
- For residual tubes, whether the product is cold-drawn or cold-rolled, and whether it is a hollow bar or a boiler and heat exchanger tube.
Often confused with
- Heading 7306Welded or riveted steel pipe
Heading 7304 is limited to seamless products; welded tube and pipe goes to 7306.
- Heading 7305Welded pipe with external diameter over 406.4 mm
Large circular welded pipe is named in heading 7305.
- Heading 7307Pipe couplings, elbows and sleeves
Fittings are classified in 7307, not with the pipe itself.
- Heading 7308Tubes cut and prepared for use in a structure
Tubes prepared for structural use fall in 7308.
- Tubes of cast iron
Heading 7304 covers iron other than cast iron; cast iron tubes are classified outside this heading.
Frequently asked questions
What is the HTS code for seamless stainless steel line pipe?
The line depends on outside diameter: 7304.11.00.20 covers stainless steel line pipe of a kind used for oil or gas pipelines with an outside diameter not exceeding 114.3 mm, at a general (MFN) rate of Free. Larger diameters go to 7304.11.00.50 or 7304.11.00.80.
What is the duty on threaded and coupled seamless stainless steel casing?
Casing of stainless steel with an outside diameter less than 215.9 mm and a wall thickness less than 12.7 mm is classified in 7304.24.30.10, at a general (MFN) rate of Free. Other diameter and wall thickness combinations have their own lines in 7304.24.30 and 7304.24.40.
How do I classify a cold-drawn seamless nonalloy steel boiler tube?
Cold-drawn or cold-rolled nonalloy steel tube suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters is classified in 7304.31.60.10, at a general (MFN) rate of Free. If the tube is not cold-drawn, the boiler tube lines under 7304.39.00 apply instead, split by outside diameter.
Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.
All lines in heading 7304
- 7304.11.00.20Having an outside diameter not exceeding 114.3 mmFree
- 7304.11.00.50Having an outside diameter exceeding 114.3 mm but not exceeding 406.4 mmFree
- 7304.11.00.80Having an outside diameter exceeding 406.4 mmFree
- 7304.19.10.20Having an outside diameter not exceeding 114.3 mmFree
- 7304.19.10.30Having an outside diameter exceeding 114.3 mm but less than 215.9 mmFree
- 7304.19.10.45Having a wall thickness less than 12.7 mmFree
- 7304.19.10.60Having a wall thickness of 12.7 mm or moreFree
- 7304.19.10.80Having an outside diameter exceeding 406.4 mmFree
- 7304.19.50.20Having an outside diameter not exceeding 114.3 mmFree
- 7304.19.50.50Having an outside diameter exceeding 114.3 mm but not exceeding 406.4 mmFree
- 7304.19.50.80Having an outside diameter exceeding 406.4 mmFree
- 7304.22.00.30Having a wall thickness not exceeding 9.5 mmFree
- 7304.22.00.45Having a wall thickness exceeding 9.5 mmFree
- 7304.22.00.60Having an outside diameter exceeding 168.3 mmFree
- 7304.23.30.00Casing, tubing and drill pipe, of a kind used in drilling for oil or gas / Of iron or nonalloy steelFree
- 7304.23.60.30Having a wall thickness not exceeding 9.5 mmFree
- 7304.23.60.45Having a wall thickness exceeding 9.5 mmFree
- 7304.23.60.60Having an outside diameter exceeding 168.3 mmFree
- 7304.24.30.10Having a wall thickness less than 12.7 mmFree
- 7304.24.30.20Having a wall thickness of 12.7 mm or moreFree
- 7304.24.30.30Having a wall thickness less than 12.7 mmFree
- 7304.24.30.40Having a wall thickness of 12.7 mm or moreFree
- 7304.24.30.45Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mmFree
- 7304.24.30.80Having an outside diameter exceeding 406.4 mmFree
- 7304.24.40.10Having a wall thickness less than 12.7 mmFree
- 7304.24.40.20Having a wall thickness of 12.7 mm or moreFree
- 7304.24.40.30Having a wall thickness less than 12.7 mmFree
- 7304.24.40.40Having a wall thickness of 12.7 mm or moreFree
- 7304.24.40.50Having a wall thickness less than 12.7 mmFree
- 7304.24.40.60Having a wall thickness of 12.7 mm or moreFree
- 7304.24.40.80Having an outside diameter exceeding 406.4 mmFree
- 7304.24.60.15Having a wall thickness not exceeding 9.5 mmFree
- 7304.24.60.30Having a wall thickness exceeding 9.5 mmFree
- 7304.24.60.45Having an outside diameter exceeding 114.3 mm but less than 215.9 mmFree
- 7304.24.60.60Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mmFree
- 7304.24.60.75Having an outside diameter exceeding 406.4 mmFree
- 7304.29.10.10Having a wall thickness less than 12.7 mmFree
- 7304.29.10.20Having a wall thickness of 12.7 mm or moreFree
- 7304.29.10.30Having a wall thickness less than 12.7 mmFree
- 7304.29.10.40Having a wall thickness of 12.7 mm or moreFree
- 7304.29.10.50Having a wall thickness less than 12.7 mmFree
- 7304.29.10.60Having a wall thickness of 12.7 mm or moreFree
- 7304.29.10.80Having an outside diameter exceeding 406.4 mmFree
- 7304.29.20.10Having a wall thickness less than 12.7 mmFree
- 7304.29.20.20Having a wall thickness of 12.7 mm or moreFree
- 7304.29.20.30Having a wall thickness less than 12.7 mmFree
- 7304.29.20.40Having a wall thickness of 12.7 mm or moreFree
- 7304.29.20.50Having a wall thickness less than 12.7 mmFree
- 7304.29.20.60Having a wall thickness of 12.7 mm or moreFree
- 7304.29.20.80Having an outside diameter exceeding 406.4 mmFree
- 7304.29.31.10Having a wall thickness less than 12.7 mmFree
- 7304.29.31.20Having a wall thickness of 12.7 mm or moreFree
- 7304.29.31.30Having a wall thickness less than 12.7 mmFree
- 7304.29.31.40Having a wall thickness of 12.7 mm or moreFree
- 7304.29.31.50Having a wall thickness less than 12.7 mmFree
- 7304.29.31.60Having a wall thickness of 12.7 mm or moreFree
- 7304.29.31.80Having an outside diameter exceeding 406.4 mmFree
- 7304.29.41.10Having a wall thickness less than 12.7 mmFree
- 7304.29.41.20Having a wall thickness of 12.7 mm or moreFree
- 7304.29.41.30Having a wall thickness less than 12.7 mmFree
- 7304.29.41.40Having a wall thickness of 12.7 mm or moreFree
- 7304.29.41.50Having a wall thickness less than 12.7 mmFree
- 7304.29.41.60Having a wall thickness of 12.7 mm or moreFree
- 7304.29.41.80Having an outside diameter exceeding 406.4 mmFree
- 7304.29.50.15Having a wall thickness not exceeding 9.5 mmFree
- 7304.29.50.30Having a wall thickness exceeding 9.5 mmFree
- 7304.29.50.45Having an outside diameter exceeding 114.3 mm but less than 215.9 mmFree
- 7304.29.50.60Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mmFree
- 7304.29.50.75Having an outside diameter exceeding 406.4 mmFree
- 7304.29.61.15Having a wall thickness not exceeding 9.5 mmFree
- 7304.29.61.30Having a wall thickness exceeding 9.5 mmFree
- 7304.29.61.45Having an outside diameter exceeding 114.3 mm but less than 215.9 mmFree
- 7304.29.61.60Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mmFree
- 7304.29.61.75Having an outside diameter exceeding 406.4 mmFree
- 7304.31.30.00Cold-drawn or cold-rolled (cold-reduced) / Hollow barsFree
- 7304.31.60.10Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heatersFree
- 7304.31.60.50Cold-drawn or cold-rolled (cold-reduced) / OtherFree
- 7304.39.00.02Having an outside diameter less than 38.1 mmFree
- 7304.39.00.04Having an outside diameter of 38.1 mm or more but less than 190.5 mmFree
- 7304.39.00.06Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mmFree
- 7304.39.00.08Having an outside diameter exceeding 285.8 mmFree
- 7304.39.00.16Galvanized, having an outside diameter not exceeding 114.3 mmFree
- 7304.39.00.20Having an outside diameter less than 38.1 mmFree
- 7304.39.00.24Having a wall thickness less than 6.4 mmFree
- 7304.39.00.28Having a wall thickness of 6.4 mm or more but not exceeding 12.7 mmFree
- 7304.39.00.32Having a wall thickness exceeding 12.7 mmFree
- 7304.39.00.36Having a wall thickness less than 12.7 mmFree
- 7304.39.00.40Having a wall thickness of 12.7 mm or more but less than 19 mmFree
- 7304.39.00.44Having a wall thickness of 19 mm or moreFree
- 7304.39.00.48Having a wall thickness less than 12.7 mmFree
- 7304.39.00.52Having a wall thickness of 12.7 mm or more but less than 19 mmFree
- 7304.39.00.56Having a wall thickness of 19 mm or moreFree
- 7304.39.00.62Having a wall thickness less than 12.7 mmFree
- 7304.39.00.68Having a wall thickness of 12.7 mm or more but less than 19 mmFree
- 7304.39.00.72Having a wall thickness of 19 mm or moreFree
- 7304.39.00.76Having a wall thickness less than 19 mmFree
- 7304.39.00.80Having a wall thickness of 19 mm or moreFree
- 7304.41.30.05Of an external diameter of less than 19 mm / Of high-nickel alloy steelFree
- 7304.41.30.15Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heatersFree
- 7304.41.30.45Of an external diameter of less than 19 mm / OtherFree
- 7304.41.60.05Cold-drawn or cold-rolled (cold-reduced) / Of high-nickel alloy steelFree
- 7304.41.60.15Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heatersFree
- 7304.41.60.45Cold-drawn or cold-rolled (cold-reduced) / OtherFree
- 7304.49.00.05Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel / Of high-nickel alloy steelFree
- 7304.49.00.15Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel / Hollow barsFree
- 7304.49.00.45Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heatersFree
- 7304.49.00.60Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel / OtherFree
- 7304.51.10.00Suitable for use in the manufacture of ball or roller bearingsFree
- 7304.51.50.05Cold-drawn or cold-rolled (cold-reduced) / Of high-nickel alloy steelFree
- 7304.51.50.15Cold-drawn or cold-rolled (cold-reduced) / Of heat-resisting steelFree
- 7304.51.50.45Cold-drawn or cold-rolled (cold-reduced) / OtherFree
- 7304.51.50.60Cold-drawn or cold-rolled (cold-reduced) / OtherFree
- 7304.59.10.00Suitable for use in the manufacture of ball or roller bearingsFree
- 7304.59.20.30Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel / Of heat-resisting steelFree
- 7304.59.20.40Having an outside diameter less than 38.1 mmFree
- 7304.59.20.45Having an outside diameter of 38.1 mm or more but not exceeding 114.3 mmFree
- 7304.59.20.55Having an outside diameter exceeding 114.3 mm but less than 190.5 mmFree
- 7304.59.20.60Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mmFree
- 7304.59.20.70Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mmFree
- 7304.59.20.80Having an outside diameter exceeding 406.4 mmFree
- 7304.59.60.00Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel / Of heat-resisting steelFree
- 7304.59.80.10Having an outside diameter less than 38.1 mmFree
- 7304.59.80.15Having a wall thickness less than 6.4 mmFree
- 7304.59.80.20Having a wall thickness of 6.4 mm or more but not exceeding 12.7 mmFree
- 7304.59.80.25Having a wall thickness exceeding 12.7 mmFree
- 7304.59.80.30Having a wall thickness less than 12.7 mmFree
- 7304.59.80.35Having a wall thickness of 12.7 mm or more but less than 19 mmFree
- 7304.59.80.40Having a wall thickness of 19 mm or moreFree
- 7304.59.80.45Having a wall thickness less than 12.7 mmFree
- 7304.59.80.50Having a wall thickness of 12.7 mm or more but less than 19 mmFree
- 7304.59.80.55Having a wall thickness of 19 mm or moreFree
- 7304.59.80.60Having a wall thickness less than 12.7 mmFree
- 7304.59.80.65Having a wall thickness of 12.7 mm or more but less than 19 mmFree
- 7304.59.80.70Having a wall thickness of 19 mm or moreFree
- 7304.59.80.80Having an outside diameter exceeding 406.4 mmFree
- 7304.90.10.00Having a wall thickness of 4 mm or more / Of iron or nonalloy steelFree
- 7304.90.30.00Having a wall thickness of 4 mm or more / Of alloy steelFree
- 7304.90.50.00Having a wall thickness of less than 4 mm / Of iron or nonalloy steelFree
- 7304.90.70.00Having a wall thickness of less than 4 mm / Of alloy steelFree