Delay Electric Detonator
Electric detonators with built-in pyrotechnic delays for sequential blasting in tunneling projects, allowing precise millisecond timing. It is covered by HTS 3603.60.00.00 as an electric detonator designed for industrial explosive operations. Delays ensure rock fragmentation without flyrock hazards.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as pyrotechnic devices for signaling rather than blasting
Non-detonator igniters for flares or signals fall under Chapter 36 fireworks and pyrotechnics, not industrial detonators.
If electronic timer circuits without explosive charge
Standalone electrical relays or timers are under Chapter 85 electrical apparatus, excluding those with detonating explosives.
If as parts of complete mining blasting machines
When imported in sets with blasting equipment, they may classify under Chapter 84 as parts of machinery for construction.
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Import Tips & Compliance
• MSHA approval required for underground mining use; store below 25°C to prevent degradation; declare exact delay durations on commercial invoice
Related Products under HTS 3603.60.00.00
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