U.S. imports of Welded Iron or Steel Oil & Gas Drilling Casing and Tubing (Non-Stainless) (HS 730629) totaled $55.8M in August 2026, imported from 16 countries.
Importers of Welded Iron or Steel Oil & Gas Drilling Casing and Tubing (Non-Stainless) paid $26.2M in duties in August 2026, an average duty rate of 46.94% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Welded Iron or Steel Oil & Gas Drilling Casing and Tubing (Non-Stainless) imports of $55.8M in August 2026 ran 16% below the year-to-date monthly average of $66.1M.
Last updated: August 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.
124 import shipments a month
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.
Subheading 3 of 10 in heading 7306
Subheading 730629 · $55.8M of $283.0M
ImportsExports
Imports
$55.8MYoY · free account
Exports
$18.9MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $782.9M of Welded Iron or Steel Oil & Gas Drilling Casing and Tubing (Non-Stainless) and exported $223.4M.
Through August 2026. Source: U.S. Census Bureau.
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Imports · August 2026
origin
South Korea and United Arab Emirates together supply 87% of it. United Arab Emirates pays 50.0% duty; Canada 0.0%.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7306292000 | Oil Well Casing Nsmls NESOI Ios Na Nt Thdd or Cpld | $42.5M | 48.19% | 100.00% | $20.5M |
| 7306296050 | Oilwell Tubing Nsmls Nes Ir/Nas Nt Imp W Coupling | $11.4M | 50.00% | 100.00% | $5.7M |
| 7306296010 | Oilwell Tubing Nsmls NESOI Ir/Nal St Imp W Couplng | $1.6M | 0.00% | 100.00% | -- |
| 7306291090 | Olwl Csng NESOI Ios Na Thdd W/O Cplg Ntsmls | $195K | 0.00% | 0.00% | -- |
| 7306298110 | Oilwell Tubing, Oth Alloy Nt Stainls, Imp W/ Couplng | $87K | 0.00% | 0.00% | -- |
| 7306294100 | Oilwell Casing, Oth Alloy not Stn, Not Thread/Coupld | $4K | 50.00% | 100.00% | $2K |
| 7306298150 | Oilwell Tubing, Alloy Nt Stainless, Nt Imp W/ Coup | — | -- | -- | -- |
| 7306293100 | Oil Well Casing, Oth Alloy Nt Stainls, Thread/Coupld | — | -- | -- | -- |
| 7306291030 | Olwl Csng NESOI Ios Na Thdd W Cplg Ntsml | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
customs district
destination
entry
rate provision · imports
0.5% enters free of duty; duty collected equals 46.94% of imports for consumption.
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.