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U.S. imports of welded iron or steel oil & gas drilling casing and tubing (non-stainless) (HS 730629) totaled $109.0M in July 2026, traded with 16 countries.
Importers of Welded Iron or Steel Oil & Gas Drilling Casing and Tubing (Non-Stainless) paid $43.8M in duties in July 2026 — an effective duty rate of 46% on $94.3M 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 $109.0M in July 2026 ran 61% above the year-to-date monthly average of $67.5M.
Last updated: July 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.
403 shipments/mo
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.
HSChapter 73
Subheading 1 of 10 in heading 7306
Subheading 730629 · $109.0M of $317.1M
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ImportsExports
Imports
$109.0MYoY · Pro
Exports
$18.8MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7306292000 | Oil Well Casing Nsmls NESOI Ios Na Nt Thdd or Cpld | $69.9M | 47.45% | 99.69% | $33.2M |
| 7306296050 | Oilwell Tubing Nsmls Nes Ir/Nas Nt Imp W Coupling | $21.4M | 47.41% | 100.00% | $10.2M |
| 7306291030 | Olwl Csng NESOI Ios Na Thdd W Cplg Ntsml | $14.4M | 0.33% | 0.66% | $48K |
| 7306296010 | Oilwell Tubing Nsmls NESOI Ir/Nal St Imp W Couplng | $2.3M | 0.00% | 100.00% | -- |
| 7306291090 | Olwl Csng NESOI Ios Na Thdd W/O Cplg Ntsmls | $747K | 50.54% | 100.00% | $377K |
| 7306298110 | Oilwell Tubing,Oth Alloy Nt Stainls,Imp W/ Couplng | $91K | 0.00% | 0.00% | -- |
| 7306298150 | Oilwell Tubing, Alloy Nt Stainless, Nt Imp W/ Coup | $32K | 0.00% | 100.00% | -- |
| 7306293100 | Oil Well Casing,Oth Alloy Nt Stainls,Thread/Coupld | $6K | 50.01% | 100.00% | $3K |
| 7306294100 | Oilwell Casing,Oth Alloy not Stn,not Thread/Coupld | $0 | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · July 2026
origin
Korea, South and Taiwan together supply 69% of it.
customs district
destination
entry
rate provision · imports
13.4% enters free of duty; the effective duty rate is 40.19%.