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HSChapter 84
U.S. imports of parts for industrial temperature-change machinery, plant & laboratory equipment (HS 841990) totaled $184.2M in April 2026, traded with 65 countries.
Last updated: April 2026 dataMexico leads US imports of replacement and service parts for industrial temperature-change equipment, reflecting deep cross-border manufacturing integration, with China and Canada also major sources. The US schedule is notably granular: dedicated lines cover parts of instantaneous or storage water heaters (8419901000), heat exchange units (8419903000), pulp and paper plant (8419902000), medical and laboratory sterilizers (8419905040, 8419909540), restaurant and similar food-service equipment (8419909520), and acrylic acid reactor machinery (8419905080). Correct parts classification requires tracing the parent equipment's tariff line, as the parts schedule mirrors the equipment hierarchy. Section 301 tariffs may apply to Chinese-origin parts.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Parts classification under 841990 generally follows the principal machine the part is designed for. When a part is dedicated to a specific type of equipment — such as a heat exchanger (8419903000) or a sterilizer (8419905040/8419909540) — it should be classified under that specific line. For parts usable across multiple equipment types, the NESOI lines (8419909550 or 8419909580) apply. A binding ruling from CBP can provide certainty for high-volume or ambiguous parts.
Yes — 8419909520 specifically covers parts of equipment for restaurants and similar food-service establishments that involve temperature change. This mirrors the parent equipment line under 841981 for restaurant/hotel use, and importers should use this dedicated line rather than the general NESOI parts lines when the parent equipment is clearly food-service oriented.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $31.6M | $17.4M | -$14.2M |
| MEXICO | $26.0M | $15.7M | -$10.3M |
| CHINA | $30.5M | $6.5M | -$23.9M |
| TAIWAN | $15.9M | $489K | -$15.5M |
| UNITED KINGDOM | $7.5M | $3.2M | -$4.3M |
Monthly import values over time
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $36.8M | $7.5M | -$29.3M |
| California | $21.0M | $11.6M | -$9.4M |
| Illinois | $8.4M | $6.1M | -$2.3M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LAREDO, TX | $18.3M | $7.1M | -$11.2M |
| HOUSTON, TX | $17.5M | $3.7M | -$13.9M |
| NORFOLK-NEWPORT NEWS, VA | $14.9M | $1.8M | -$13.0M |