U.S. imports of Seamless Iron & Non-Stainless Steel Casing & Tubing for Oil & Gas Drilling (HS 730429) totaled $53.0M in August 2026, imported from 27 countries.
Importers of Seamless Iron & Non-Stainless Steel Casing & Tubing for Oil & Gas Drilling paid $24.7M in duties in August 2026, an average duty rate of 45.06% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Seamless Iron & Non-Stainless Steel Casing & Tubing for Oil & Gas Drilling imports of $53.0M in August 2026 ran 29% above the year-to-date monthly average of $41.2M.
Last updated: August 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.
284 import shipments a month
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.
ImportsExports
Imports
$53.0MYoY · free account
Exports
$13.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $503.3M of Seamless Iron & Non-Stainless Steel Casing & Tubing for Oil & Gas Drilling and exported $88.3M.
Through August 2026. Source: U.S. Census Bureau.
Subheading 1 of 13 in heading 7304
Subheading 730429 · $53.0M of $182.5M
Trade Directory
List your company under HS 730429 — Seamless Iron & Non-Stainless Steel Casing & Tubing for Oil & Gas Drilling, so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
Casing, Smls, Oth Aly, NESOI, Dia285.8-406.4, Th>12.7mm
Casing, Smls, Oth Aly, Thrd, Dia285.8-406.4, Th>=12.7mm
Casing, Smls, Oil/Gas, Aly Nt Stn, NESOI, Diam >406.4mm
Casing, Smls, Oth Aly, Thrd, Dia285.8-406.4, Thk<12.7mm
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 · August 2026
origin
Mexico and Austria together supply 41% of it. Austria pays 50.0% duty; India 37.0%.
customs district
destination
entry
rate provision · imports
1.1% enters free of duty; duty collected equals 45.06% of imports for consumption.