8424.30 - Steam or sand blasting machines and similar jet projecting machines:

HTS category 8424.30 encompasses machines designed for projecting jets of material, specifically steam or sand blasting machines, along with similar jet projecting appliances. These machines are characterized by their ability to forcefully expel a stream of abrasive particles (like sand) or high-pressure steam to clean, etch, or prepare surfaces. The core function involves generating and directing a powerful jet for abrasive or cleaning purposes.

This category is distinct from its sibling, 8424.10, which covers fire extinguishers, and 8424.20, which includes spray guns and similar appliances for projecting liquids or powders for non-abrasive applications such as painting or fertilizing. While all fall under the broader umbrella of projecting machines, 8424.30 is specifically focused on high-velocity jet projection for abrasive or intensive cleaning tasks, rather than dispersing paints, pesticides, or extinguishing fires.

Within 8424.30, a further distinction is made between sand blasting machines (8424.30.10.00), which utilize sand or other abrasive media, and other similar jet projecting machines (8424.30.90.00) that may use steam or other high-pressure fluids for their projecting action. This subdivision allows for more granular classification based on the primary medium used for projection and the specific engineering of the machine.