HTS 7304: Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel

Heading 7304 of the Harmonized Tariff Schedule of the United States has 139 ten-digit statistical numbers. A US entry line in ACE needs the full ten digits, with the quantity in kg.

Check additional duties before you file

Goods under this heading are often covered by antidumping or countervailing duty orders (seamless pipe and oil country tubular goods). Confirm scope, country and manufacturer in CBP's AD/CVD case search. A missing case number is a common reason for penalties.
Steel and aluminum articles here may carry Section 232 duties. The entry can need the Chapter 99 number, the metal value and the country where the metal was melted and poured, or smelted and cast.
If the goods are made in China, check Section 301 duties under HTSUS heading 9903.88, on top of the general rate, and any exclusions.

HTSUS number	Description	Unit	General rate
	Line pipe of a kind used for oil or gas pipelines:
7304.11.00	Of stainless steel		Free
7304.11.00.20	Having an outside diameter not exceeding 114.3 mm	kg
7304.11.00.50	Having an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm	kg
7304.11.00.80	Having an outside diameter exceeding 406.4 mm	kg
7304.19	Other:
7304.19.10	Of iron or nonalloy steel		Free
7304.19.10.20	Having an outside diameter not exceeding 114.3 mm	kg
7304.19.10.30	Having an outside diameter exceeding 114.3 mm but less than 215.9 mm	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mm:
7304.19.10.45	Having a wall thickness less than 12.7 mm	kg
7304.19.10.60	Having a wall thickness of 12.7 mm or more	kg
7304.19.10.80	Having an outside diameter exceeding 406.4 mm	kg
7304.19.50	Of other alloy steel		Free
7304.19.50.20	Having an outside diameter not exceeding 114.3 mm	kg
7304.19.50.50	Having an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm	kg
7304.19.50.80	Having an outside diameter exceeding 406.4 mm	kg
	Casing, tubing and drill pipe, of a kind used in drilling for oil or gas:
7304.22.00	Drill pipe of stainless steel		Free
	Having an outside diameter not exceeding 168.3 mm:
7304.22.00.30	Having a wall thickness not exceeding 9.5 mm	kg
7304.22.00.45	Having a wall thickness exceeding 9.5 mm	kg
7304.22.00.60	Having an outside diameter exceeding 168.3 mm	kg
7304.23	Other drill pipe:
7304.23.30.00	Of iron or nonalloy steel	kg	Free
7304.23.60	Of alloy steel		Free
	Having an outside diameter not exceeding 168.3 mm:
7304.23.60.30	Having a wall thickness not exceeding 9.5 mm	kg
7304.23.60.45	Having a wall thickness exceeding 9.5 mm	kg
7304.23.60.60	Having an outside diameter exceeding 168.3 mm	kg
7304.24	Other, of stainless steel:
	Casing:
7304.24.30	Threaded or coupled		Free
	Having an outside diameter less than 215.9 mm:
7304.24.30.10	Having a wall thickness less than 12.7 mm	kg
7304.24.30.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.24.30.30	Having a wall thickness less than 12.7 mm	kg
7304.24.30.40	Having a wall thickness of 12.7 mm or more	kg
7304.24.30.45	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm	kg
7304.24.30.80	Having an outside diameter exceeding 406.4 mm	kg
7304.24.40	Other		Free
	Having an outside diameter less than 215.9 mm:
7304.24.40.10	Having a wall thickness less than 12.7 mm	kg
7304.24.40.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.24.40.30	Having a wall thickness less than 12.7 mm	kg
7304.24.40.40	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.24.40.50	Having a wall thickness less than 12.7 mm	kg
7304.24.40.60	Having a wall thickness of 12.7 mm or more	kg
7304.24.40.80	Having an outside diameter exceeding 406.4 mm	kg
7304.24.60	Tubing		Free
	Having an outside diameter not exceeding 114.3 mm:
7304.24.60.15	Having a wall thickness not exceeding 9.5 mm	kg
7304.24.60.30	Having a wall thickness exceeding 9.5 mm	kg
7304.24.60.45	Having an outside diameter exceeding 114.3 mm but less than 215.9 mm	kg
7304.24.60.60	Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mm	kg
7304.24.60.75	Having an outside diameter exceeding 406.4 mm	kg
7304.29	Other:
	Casing:
	Of iron or nonalloy steel:
7304.29.10	Threaded or coupled		Free
	Having an outside diameter less than 215.9 mm:
7304.29.10.10	Having a wall thickness less than 12.7 mm	kg
7304.29.10.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.29.10.30	Having a wall thickness less than 12.7 mm	kg
7304.29.10.40	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.10.50	Having a wall thickness less than 12.7 mm	kg
7304.29.10.60	Having a wall thickness of 12.7 mm or more	kg
7304.29.10.80	Having an outside diameter exceeding 406.4 mm	kg
7304.29.20	Other		Free
	Having an outside diameter less than 215.9 mm:
7304.29.20.10	Having a wall thickness less than 12.7 mm	kg
7304.29.20.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.29.20.30	Having a wall thickness less than 12.7 mm	kg
7304.29.20.40	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.20.50	Having a wall thickness less than 12.7 mm	kg
7304.29.20.60	Having a wall thickness of 12.7 mm or more	kg
7304.29.20.80	Having an outside diameter exceeding 406.4 mm	kg
	Of other alloy steel:
7304.29.31	Threaded or coupled		Free
	Having an outside diameter less than 215.9 mm:
7304.29.31.10	Having a wall thickness less than 12.7 mm	kg
7304.29.31.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.29.31.30	Having a wall thickness less than 12.7 mm	kg
7304.29.31.40	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.31.50	Having a wall thickness less than 12.7 mm	kg
7304.29.31.60	Having a wall thickness of 12.7 mm or more	kg
7304.29.31.80	Having an outside diameter exceeding 406.4 mm	kg
7304.29.41	Other		Free
	Having an outside diameter less than 215.9 mm:
7304.29.41.10	Having a wall thickness less than 12.7 mm	kg
7304.29.41.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.29.41.30	Having a wall thickness less than 12.7 mm	kg
7304.29.41.40	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.41.50	Having a wall thickness less than 12.7 mm	kg
7304.29.41.60	Having a wall thickness of 12.7 mm or more	kg
7304.29.41.80	Having an outside diameter exceeding 406.4 mm	kg
	Tubing:
7304.29.50	Of iron or nonalloy steel		Free
	Having an outside diameter not exceeding 114.3 mm:
7304.29.50.15	Having a wall thickness not exceeding 9.5 mm	kg
7304.29.50.30	Having a wall thickness exceeding 9.5 mm	kg
7304.29.50.45	Having an outside diameter exceeding 114.3 mm but less than 215.9 mm	kg
7304.29.50.60	Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mm	kg
7304.29.50.75	Having an outside diameter exceeding 406.4 mm	kg
7304.29.61	Of other alloy steel		Free
	Having an outside diameter not exceeding 114.3 mm:
7304.29.61.15	Having a wall thickness not exceeding 9.5 mm	kg
7304.29.61.30	Having a wall thickness exceeding 9.5 mm	kg
7304.29.61.45	Having an outside diameter exceeding 114.3 mm but less than 215.9 mm	kg
7304.29.61.60	Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mm	kg
7304.29.61.75	Having an outside diameter exceeding 406.4 mm	kg
	Other, of circular cross section, of iron or nonalloy steel:
7304.31	Cold-drawn or cold-rolled (cold-reduced):
7304.31.30.00	Hollow bars	kg	Free
7304.31.60	Other		Free
7304.31.60.10	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters	kg
7304.31.60.50	Other	kg
7304.39.00	Other		Free
	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters:
7304.39.00.02	Having an outside diameter less than 38.1 mm	kg
7304.39.00.04	Having an outside diameter of 38.1 mm or more but less than 190.5 mm	kg
7304.39.00.06	Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm	kg
7304.39.00.08	Having an outside diameter exceeding 285.8 mm	kg
	Other:
7304.39.00.16	Galvanized, having an outside diameter not exceeding 114.3 mm	kg
	Other:
7304.39.00.20	Having an outside diameter less than 38.1 mm	kg
	Having an outside diameter of 38.1 mm or more but not exceeding 114.3 mm:
7304.39.00.24	Having a wall thickness less than 6.4 mm	kg
7304.39.00.28	Having a wall thickness of 6.4 mm or more but not exceeding 12.7 mm	kg
7304.39.00.32	Having a wall thickness exceeding 12.7 mm	kg
	Having an outside diameter exceeding 114.3 mm but less than 190.5 mm:
7304.39.00.36	Having a wall thickness less than 12.7 mm	kg
7304.39.00.40	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.39.00.44	Having a wall thickness of 19 mm or more	kg
	Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm:
7304.39.00.48	Having a wall thickness less than 12.7 mm	kg
7304.39.00.52	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.39.00.56	Having a wall thickness of 19 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.39.00.62	Having a wall thickness less than 12.7 mm	kg
7304.39.00.68	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.39.00.72	Having a wall thickness of 19 mm or more	kg
	Having an outside diameter exceeding 406.4 mm:
7304.39.00.76	Having a wall thickness less than 19 mm	kg
7304.39.00.80	Having a wall thickness of 19 mm or more	kg
	Other, of circular cross section, of stainless steel:
7304.41	Cold-drawn or cold-rolled (cold-reduced):
7304.41.30	Of an external diameter of less than 19 mm		Free
7304.41.30.05	Of high-nickel alloy steel	kg
	Other:
7304.41.30.15	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters	kg
7304.41.30.45	Other	kg
7304.41.60	Other		Free
7304.41.60.05	Of high-nickel alloy steel	kg
	Other:
7304.41.60.15	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters	kg
7304.41.60.45	Other	kg
7304.49.00	Other		Free
7304.49.00.05	Of high-nickel alloy steel	kg
	Other:
7304.49.00.15	Hollow bars	kg
	Other:
7304.49.00.45	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters	kg
7304.49.00.60	Other	kg
	Other, of circular cross section, of other alloy steel:
7304.51	Cold-drawn or cold-rolled (cold-reduced):
7304.51.10.00	Suitable for use in the manufacture of ball or roller bearings	kg	Free
7304.51.50	Other		Free
7304.51.50.05	Of high-nickel alloy steel	kg
	Other:
	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters:
7304.51.50.15	Of heat-resisting steel	kg
7304.51.50.45	Other	kg
7304.51.50.60	Other	kg
7304.59	Other:
7304.59.10.00	Suitable for use in the manufacture of ball or roller bearings	kg	Free
	Other:
7304.59.20	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters		Free
7304.59.20.30	Of heat-resisting steel	kg
	Other:
7304.59.20.40	Having an outside diameter less than 38.1 mm	kg
7304.59.20.45	Having an outside diameter of 38.1 mm or more but not exceeding 114.3 mm	kg
7304.59.20.55	Having an outside diameter exceeding 114.3 mm but less than 190.5 mm	kg
7304.59.20.60	Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm	kg
7304.59.20.70	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm	kg
7304.59.20.80	Having an outside diameter exceeding 406.4 mm	kg
	Other:
7304.59.60.00	Of heat-resisting steel	kg	Free
7304.59.80	Other		Free
7304.59.80.10	Having an outside diameter less than 38.1 mm	kg
	Having an outside diameter of 38.1 mm or more but not exceeding 114.3 mm:
7304.59.80.15	Having a wall thickness less than 6.4 mm	kg
7304.59.80.20	Having a wall thickness of 6.4 mm or more but not exceeding 12.7 mm	kg
7304.59.80.25	Having a wall thickness exceeding 12.7 mm	kg
	Having an outside diameter exceeding 114.3 mm but less than 190.5 mm:
7304.59.80.30	Having a wall thickness less than 12.7 mm	kg
7304.59.80.35	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.59.80.40	Having a wall thickness of 19 mm or more	kg
	Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm:
7304.59.80.45	Having a wall thickness less than 12.7 mm	kg
7304.59.80.50	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.59.80.55	Having a wall thickness of 19 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.59.80.60	Having a wall thickness less than 12.7 mm	kg
7304.59.80.65	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.59.80.70	Having a wall thickness of 19 mm or more	kg
7304.59.80.80	Having an outside diameter exceeding 406.4 mm	kg
7304.90	Other:
	Having a wall thickness of 4 mm or more:
7304.90.10.00	Of iron or nonalloy steel	kg	Free
7304.90.30.00	Of alloy steel	kg	Free
	Having a wall thickness of less than 4 mm:
7304.90.50.00	Of iron or nonalloy steel	kg	Free
7304.90.70.00	Of alloy steel	kg	Free

Common paperwork mistakes with heading 7304

The invoice shows the exporter's own code. Only the first six digits are shared worldwide; the US number has ten. Check every line against the list above.
The quantity is in the wrong unit. These lines report quantity in kg, which may not match the invoice's cartons, sets or pieces.
The packing list and the bill of lading disagree on cartons or gross weight, which can lead to holds and exams.
The manufacturer's name and address are missing, so the MID cannot be built from the documents.

Look up any ten-digit number, or read the guide to invoice and packing list mismatches.

Check the whole shipment, not one number

FreightProof reads the invoice, packing list and bill of lading together, validates every HTS number and container, builds the MIDs and flags what does not match — in about two minutes.

Check a shipment free — no signup See a sample report

Data: Harmonized Tariff Schedule of the United States, US International Trade Commission. Rates are for information only.