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HSChapter 73
U.S. imports of welded iron or steel oil & gas drilling casing and tubing (non-stainless) (HS 730629) totaled $43.2M in April 2026, traded with 15 countries.
Importers of Welded Iron or Steel Oil & Gas Drilling Casing and Tubing (Non-Stainless) paid $14.2M in duties in April 2026 — an effective duty rate of 44% on $32.3M in dutiable value, based on actual customs collections rather than the published tariff schedule. Welded Iron or Steel Oil & Gas Drilling Casing and Tubing (Non-Stainless) imports of $43.2M in April 2026 ran 25% below the year-to-date monthly average of $57.9M.
Last updated: April 2026 dataNon-stainless welded casing and tubing for oil and gas drilling — spanning iron, non-alloy, and other alloy steel grades — represents the broadest and most commercially active segment of welded OCTG imports. The heading carries an extensive set of 10-digit tariff lines that differentiate by alloy type, threading/coupling status, and whether the product is casing or tubing, making precise product documentation critical at entry. South Korea and Canada are the leading suppliers, with Taiwan, the United Arab Emirates, and Vietnam also among the top sources. Section 232 tariffs apply, and antidumping and countervailing duty orders on OCTG from multiple countries may also be relevant depending on origin.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Three factors drive the line selection: (1) alloy content — iron/non-alloy steel versus other alloy steel (non-stainless); (2) product type — casing versus tubing; and (3) threading and coupling configuration — threaded and coupled, threaded without coupling, or neither. Mill test reports for chemical composition and product certifications showing threading/coupling status are the essential supporting documents.
Antidumping and countervailing duty orders on OCTG are country- and product-specific, and the scope language in each order defines covered merchandise by specification, grade, and sometimes diameter. For origins like the UAE and Vietnam, importers should obtain a scope ruling or consult a licensed customs broker to determine whether the specific product — by alloy, size, and threading configuration — falls within any active order's scope before the shipment departs.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $11.9M | $14.4M | +$2.5M |
| KOREA, SOUTH | $20.6M | -- | -$20.6M |
| TAIWAN | $7.6M | -- | -$7.6M |
| PHILIPPINES | $2.8M | -- | -$2.8M |
| SAUDI ARABIA | -- | $1.4M | +$1.4M |
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 |
|---|---|---|---|---|
| 7306292000 | OIL WELL CASING NSMLS NESOI IOS NA NT THDD OR CPLD | $21.1M | 41.06% | $9.0M |
| 7306291030 | OLWL CSNG NESOI IOS NA THDD W CPLG NTSML | $11.6M | -- | -- |
| 7306296050 | OILWELL TUBING NSMLS NES IR/NAS NT IMP W COUPLING | $7.3M | 50.00% | $3.7M |
| 7306291090 | OLWL CSNG NESOI IOS NA THDD W/O CPLG NTSMLS | $3.0M | 50.00% | $1.5M |
| 7306298110 | OILWELL TUBING,OTH ALLOY NT STAINLS,IMP W/ COUPLNG | $142K | 50.00% | $11K |
| 7306293100 | OIL WELL CASING,OTH ALLOY NT STAINLS,THREAD/COUPLD | $19K | 50.00% | $9K |
| 7306298150 | OILWELL TUBING, ALLOY NT STAINLESS, NT IMP W/ COUP | $0 | -- | -- |
| 7306294100 | OILWELL CASING,OTH ALLOY NOT STN,NOT THREAD/COUPLD | $0 | -- | -- |
| 7306296010 | OILWELL TUBING NSMLS NESOI IR/NAL ST IMP W COUPLNG | $0 | -- | -- |
OIL WELL CASING NSMLS NESOI IOS NA NT THDD OR CPLD
OLWL CSNG NESOI IOS NA THDD W CPLG NTSML
OILWELL TUBING NSMLS NES IR/NAS NT IMP W COUPLING
OLWL CSNG NESOI IOS NA THDD W/O CPLG NTSMLS
OILWELL TUBING,OTH ALLOY NT STAINLS,IMP W/ COUPLNG
OIL WELL CASING,OTH ALLOY NT STAINLS,THREAD/COUPLD
OILWELL TUBING, ALLOY NT STAINLESS, NT IMP W/ COUP
OILWELL CASING,OTH ALLOY NOT STN,NOT THREAD/COUPLD
OILWELL TUBING NSMLS NESOI IR/NAL ST IMP W COUPLNG
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7306293000 | CASING OF ALLOY ST, NT STAINLESS, NT SEAMLSS NESOI | $11.7M |
| 7306298100 | TUBING OF ALLOY STEEL, NT STAINLS, NT SEAMLS NESOI | $6.5M |
| 7306296000 | TUBING OF IRON OR NONALLOY STEEL NT SMLS NESOI | $47K |
| 7306291500 | CASING OF IRON OR NONALLOY STEEL NT SMLS, NESOI | $0 |
CASING OF ALLOY ST, NT STAINLESS, NT SEAMLSS NESOI
7.0M kg
TUBING OF ALLOY STEEL, NT STAINLS, NT SEAMLS NESOI
2.1M kg
TUBING OF IRON OR NONALLOY STEEL NT SMLS NESOI
19.9K kg
CASING OF IRON OR NONALLOY STEEL NT SMLS, NESOI
ARTICLES OF IRON OR STEEL NESOI
HS 732690
STRUCTURES AND PARTS NESOI OF IRON OR STEEL
HS 730890
THREADED SCREWS AND BOLTS NESOI OF IRON OR STEEL
HS 731815
COOKING APPLIANCES ETC FOR GAS FUEL, IRON OR STEEL
HS 732111
NUTS OF IRON OR STEEL
HS 731816
TABLE, KITCHEN ETC ARTICLES & PTS, STAINLESS STEEL
HS 732393
Supplier Network
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| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $30.2M | $4.9M | -$25.2M |
| New York | -- | $13.0M | +$13.0M |
| West Virginia | $2.9M | -- | -$2.9M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $30.1M | $3.5M | -$26.6M |
| BUFFALO-NIAGARA FALLS, NY | $5.8M | $13.0M | +$7.2M |
| PORT HURON, MI | $5.8M | -- | -$5.8M |