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HSChapter 73
U.S. imports of seamless iron & non-stainless steel casing & tubing for oil & gas drilling (HS 730429) totaled $31.9M in April 2026, traded with 22 countries.
Importers of Seamless Iron & Non-Stainless Steel Casing & Tubing for Oil & Gas Drilling paid $14.0M in duties in April 2026 — an effective duty rate of 43% on $32.3M in dutiable value, based on actual customs collections rather than the published tariff schedule. Seamless Iron & Non-Stainless Steel Casing & Tubing for Oil & Gas Drilling imports of $31.9M in April 2026 ran 24% below the year-to-date monthly average of $41.8M.
Last updated: April 2026 dataAmong the most extensively subdivided headings in Chapter 73, this subheading covers seamless carbon, nonalloy, and alloy (non-stainless) steel casing and tubing — the core OCTG products used to complete oil and gas wells. The US schedule creates dozens of 10-digit lines organized by steel type (iron/nonalloy vs. alloy non-stainless), product form (casing vs. tubing), end finish (threaded vs. NESOI), outer diameter band, and wall thickness, reflecting the long history of antidumping and countervailing duty litigation over OCTG imports. Section 232 tariffs apply on top of any trade-remedy duties, and given the number of active orders covering multiple source countries, a thorough scope analysis and country-of-origin review is essential before any import program is initiated.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Start by identifying the steel type (iron/nonalloy at 7304291xxx–7304292xxx, or alloy non-stainless at 7304293xxx–7304294xxx), then determine whether the product is casing or tubing, then apply the end-finish split (threaded vs. NESOI for casing), and finally slot the outer diameter and wall thickness into the applicable band. Mill test certificates, API Spec 5CT documentation, and manufacturer dimensional data sheets are the essential supporting documents. When a product spans a boundary — for example, an OD very close to 215.9 mm — a binding ruling request to CBP is the safest path.
Several antidumping and countervailing duty orders on OCTG casing have historically used wall-thickness thresholds in their scope definitions, mirroring the HTS line structure. Pipe with wall thickness at or above 12.7 mm may fall under a different 10-digit line (e.g., 7304293120 vs. 7304293110) and could be within or outside a particular order's scope. Importers should cross-reference the specific order's scope language against the pipe's actual wall measurement — not a nominal specification — to determine duty applicability.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| AUSTRIA | $13.9M | -- | -$13.9M |
| MEXICO | $3.9M | $2.9M | -$938K |
| CANADA | $2.6M | $1.7M | -$925K |
| KOREA, SOUTH | $3.3M | -- | -$3.3M |
| ITALY | $2.0M | -- | -$2.0M |
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7304293110 | CASING,SMLS,ALY ST NT STN,THR,DIA<215.9,THK<12.7MM | $9.5M | 50.00% | $4.8M |
| 7304291010 | CASING, SEAMLESS,IRON/STEEL,THREAD,DIAM LT 215.9MM | $8.4M | 50.00% | $4.2M |
| 7304296115 | TUBING,SEMLS,OIL/GAS,OTH ALY,DIAM<=114.3,THK<9.5MM | $3.9M | 50.00% | $1.2M |
| 7304292010 | CASING,SEM,IRN/STL,NESOI,DIA LT 215.9THK LT 12.7MM | $1.9M | 50.00% | $1.9M |
| 7304295015 | TUBING,SM,OIL/GAS,IRN/STL,DIAM GT 114.3,LT=9.5MM | $1.8M | 50.00% | $918K |
| 7304294160 | CASING,SMLS,OTH ALY,NESOI,DIA285.8-406.4,TH>12.7MM | $1.7M | 27.80% | $481K |
| 7304293160 | CASING,SMLS,OTH ALY,THRD,DIA285.8-406.4,TH>=12.7MM | $1.1M | 3.56% | $38K |
| 7304294140 | CASNG,SMLS,OTH ALY,NESOI,DIA215.9-285.8,TH>=12.7MM | $940K | 0.00% | -- |
| 7304292020 | CASING,SEM,IRN/STL,NESOI,DIAM LT 215.9,GT=12.7MM | $774K | 0.00% | -- |
| 7304293150 | CASING,SMLS,OTH ALY,THRD,DIA285.8-406.4,THK<12.7MM | $468K | 50.00% | $234K |
| 7304296160 | TUBING,SEMLS,OIL/GAS,OTH ALY,DIAM 215.9MM-406.4MM | $459K | 0.00% | -- |
| 7304293140 | CASING,SEMLES,OTH ALY,THRED,215.9-285.9,THK>12.7MM | $332K | 50.00% | $166K |
| 7304294130 | CASING,SMLS,OTH ALY,NESOI,DIA215.9-285.8,TH<12.7MM | $281K | 0.00% | -- |
| 7304292060 | CASING,SMLES,IRN/STL,NESOI,285.8-406.4 GT=12.7MM | $121K | 0.00% | -- |
| 7304295045 | TUBING,SEM,OIL/GAS,IRON/STL,DIAM 114.3-215.9MM | $105K | 50.00% | $52K |
| 7304292050 | CASING,SEMLES,IRN/STL,NESOI,285.8-406.4 LT 12.7MM | $45K | 0.00% | -- |
| 7304295075 | TUBING,SEMLS,OIL/GAS,IRON/STEEL,DIAM GT 406.4MM | $6K | -- | -- |
| 7304291020 | CASING,SEMLES,RN/STL,DIAM LT 215.9MM,WALL GT=12.7 | $5K | 50.00% | $2K |
| 7304294110 | CASING,SEM,ALY NT STN,NESOI,DIA<215.9,THK<12.7MM | $4K | 0.00% | -- |
| 7304296145 | TUBING,SEMLS,OIL/GAS,OTH ALY,DIA 114.3MM - 215.9MM | $3K | 50.00% | $2K |
| 7304296175 | TUBING,SEMLES,OIL/GAS,ALLOY NOT STN,DIAM>406.4MM | $2K | 50.00% | $1K |
| 7304293120 | CASING,SEMLES,ALY NT STN,THRD,DIA<215.9,THK>12.7MM | $0 | -- | -- |
| 7304291060 | CASING,SMLES,IRN/STL,(285.8-406.4)THK GT=12.7MM | $0 | -- | -- |
| 7304291050 | CASING,SEM,IRN/STL,THRD(285.8-406.4),THK LT 12.7MM | $0 | -- | -- |
| 7304293130 | CASING,SMLS, AL NT STN,THR,215.9-285.8,THK<12.7MM | $0 | -- | -- |
| 7304291040 | CASING,SEM,IRN/STL,THRD,215.9-285.8,THK GT 12.7MM | $0 | -- | -- |
| 7304292040 | CASING,SMLES,IRN/STL,NESOI,215.9-285.8 GT=12.7MM | $0 | -- | -- |
| 7304295060 | TUBING,SEMLS,OIL/GAS,IR/STL,DIAM (215.9-406.4MM) | $0 | -- | -- |
| 7304296130 | TUBING,SEMLS,OIL/GAS,ALY NT STN,DIA<114.3,TH>9.5MM | $0 | -- | -- |
| 7304292080 | CASING, SEMLES, IRON/STEEL, NESOI,DIAM GT 406.4MM | $0 | -- | -- |
| 7304294180 | CASING,SMLS,OIL/GAS,ALY NT STN,NESOI,DIAM >406.4MM | $0 | -- | -- |
| 7304292030 | CASING,SEMLES,IRN/STL,NESOI,215.9-285.8 LT 12.7MM | $0 | -- | -- |
| 7304291080 | CASING,SEAMLES,IRON/STEEL,THREAD,DIAM GT 406.4MM | $0 | -- | -- |
| 7304293180 | CASING,SEAMLS,OIL/GAS,ALY STL,THRED,DIAMGT406.4MM | $0 | -- | -- |
| 7304294120 | CASING,SEM,ALY NT STN,NESOI,DIA<215.9,THK>=12.7MM | $0 | -- | -- |
CASING,SMLS,ALY ST NT STN,THR,DIA<215.9,THK<12.7MM
CASING, SEAMLESS,IRON/STEEL,THREAD,DIAM LT 215.9MM
TUBING,SEMLS,OIL/GAS,OTH ALY,DIAM<=114.3,THK<9.5MM
CASING,SEM,IRN/STL,NESOI,DIA LT 215.9THK LT 12.7MM
TUBING,SM,OIL/GAS,IRN/STL,DIAM GT 114.3,LT=9.5MM
CASING,SMLS,OTH ALY,NESOI,DIA285.8-406.4,TH>12.7MM
CASING,SMLS,OTH ALY,THRD,DIA285.8-406.4,TH>=12.7MM
CASNG,SMLS,OTH ALY,NESOI,DIA215.9-285.8,TH>=12.7MM
CASING,SEM,IRN/STL,NESOI,DIAM LT 215.9,GT=12.7MM
CASING,SMLS,OTH ALY,THRD,DIA285.8-406.4,THK<12.7MM
TUBING,SEMLS,OIL/GAS,OTH ALY,DIAM 215.9MM-406.4MM
CASING,SEMLES,OTH ALY,THRED,215.9-285.9,THK>12.7MM
CASING,SMLS,OTH ALY,NESOI,DIA215.9-285.8,TH<12.7MM
CASING,SMLES,IRN/STL,NESOI,285.8-406.4 GT=12.7MM
TUBING,SEM,OIL/GAS,IRON/STL,DIAM 114.3-215.9MM
CASING,SEMLES,IRN/STL,NESOI,285.8-406.4 LT 12.7MM
TUBING,SEMLS,OIL/GAS,IRON/STEEL,DIAM GT 406.4MM
CASING,SEMLES,RN/STL,DIAM LT 215.9MM,WALL GT=12.7
CASING,SEM,ALY NT STN,NESOI,DIA<215.9,THK<12.7MM
TUBING,SEMLS,OIL/GAS,OTH ALY,DIA 114.3MM - 215.9MM
TUBING,SEMLES,OIL/GAS,ALLOY NOT STN,DIAM>406.4MM
CASING,SEMLES,ALY NT STN,THRD,DIA<215.9,THK>12.7MM
CASING,SMLES,IRN/STL,(285.8-406.4)THK GT=12.7MM
CASING,SEM,IRN/STL,THRD(285.8-406.4),THK LT 12.7MM
CASING,SMLS, AL NT STN,THR,215.9-285.8,THK<12.7MM
CASING,SEM,IRN/STL,THRD,215.9-285.8,THK GT 12.7MM
CASING,SMLES,IRN/STL,NESOI,215.9-285.8 GT=12.7MM
TUBING,SEMLS,OIL/GAS,IR/STL,DIAM (215.9-406.4MM)
TUBING,SEMLS,OIL/GAS,ALY NT STN,DIA<114.3,TH>9.5MM
CASING, SEMLES, IRON/STEEL, NESOI,DIAM GT 406.4MM
CASING,SMLS,OIL/GAS,ALY NT STN,NESOI,DIAM >406.4MM
CASING,SEMLES,IRN/STL,NESOI,215.9-285.8 LT 12.7MM
CASING,SEAMLES,IRON/STEEL,THREAD,DIAM GT 406.4MM
CASING,SEAMLS,OIL/GAS,ALY STL,THRED,DIAMGT406.4MM
CASING,SEM,ALY NT STN,NESOI,DIA<215.9,THK>=12.7MM
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7304296100 | OIL WELL TUBING OF OTHER ALLOY STEEL NOT STAINLESS | $5.1M |
| 7304293155 | OIL WELL CASING OF OTHER ALLOY STEEL NOT STAINLESS | $924K |
| 7304295000 | OIL WELL TUBING OF IRON OR NONALLOY STEEL | $893K |
| 7304291055 | OIL WELL CASING OF IRON OR NONALLOY STEEL | $597K |
OIL WELL TUBING OF OTHER ALLOY STEEL NOT STAINLESS
1.8M kg
OIL WELL CASING OF OTHER ALLOY STEEL NOT STAINLESS
338.7K kg
OIL WELL TUBING OF IRON OR NONALLOY STEEL
123.5K kg
OIL WELL CASING OF IRON OR NONALLOY STEEL
38.0K kg
TABLE, KITCHEN ETC ARTICLES & PTS, STAINLESS STEEL
HS 732393
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $27.9M | $6.8M | -$21.1M |
| North Dakota | $1.3M | -- | -$1.3M |
| Louisiana | $875K | $6K | -$869K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $25.0M | $2.2M | -$22.8M |
| BROWNSVILLE, TX | $1.0M | $2.3M | +$1.3M |
| SAULT STE MARIE, MI | $2.2M | -- | -$2.2M |