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SITCSection 7
U.S. imports of electric industrial or laboratory furnaces & ovens (not elsewhere specified) (SITC 74133) totaled $2.2M in April 2026, traded with 23 countries.
Importers of Electric Industrial or Laboratory Furnaces & Ovens (Not Elsewhere Specified) paid $341K in duties in April 2026 — an effective duty rate of 18% on $1.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Electric Industrial or Laboratory Furnaces & Ovens (Not Elsewhere Specified) imports of $2.2M in April 2026 ran 32% below the year-to-date monthly average of $3.2M.
Last updated: April 2026 dataPlasma furnaces, arc furnaces, electron-beam units, and other electrically heated industrial or laboratory thermal equipment that does not fit the resistance or induction categories fall into this residual heading, making precise technical documentation especially important at classification. These specialized furnaces serve advanced manufacturing sectors including aerospace alloy production, nuclear fuel processing, and research institutions requiring ultra-high-temperature or controlled-atmosphere environments. Because the heading is defined by exclusion—electric, but neither resistance nor induction—importers must be prepared to demonstrate why the principal heating mechanism differs from those covered by adjacent headings. Section 301 exposure for Chinese-origin equipment warrants pre-import tariff analysis.
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Arc furnaces (including electric arc steelmaking furnaces), plasma furnaces, electron-beam furnaces, and photonic or laser-heated laboratory units are the most common equipment classified here. The unifying criterion is that the primary heating mechanism is electrical but is neither resistive element heating nor electromagnetic induction—the two technologies covered by the adjacent headings.
A manufacturer's technical specification sheet identifying the heating principle (e.g., electric arc, plasma torch, electron beam) is the primary evidence. Supplementing this with a circuit or process diagram showing the absence of resistive elements or induction coils as the primary heat source strengthens the classification position and reduces the likelihood of a CBP query at entry.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $45K | $1.1M | +$1.1M |
| GERMANY | $541K | $251K | -$290K |
| CHINA | $542K | -- | -$542K |
| KOREA, SOUTH | $383K | $61K | -$322K |
| TAIWAN | $39K | $256K | +$217K |
Monthly import values over time