Choose the Right Blast Nozzle for Abrasive Blasting

What is a blast nozzle?

The sandblasting nozzle is a key component of the sandblasting equipment, which is responsible for spraying abrasives at high speed onto the surface of the workpiece for cleaning, rust removal, surface strengthening or pretreatment processes.

What materials are blast nozzles manufactured from?

Blast nozzles are typically made of steel, alumina, tungsten carbide, silicon nitride, silicon carbide, boron carbide. The material of the nozzle directly affects its wear resistance, life and applicable scenarios. Nozzles of different materials are suitable for different abrasive types, pressure ranges and working environments.

Key factors to consider when selecting a nozzle

The choice of nozzle directly affects the efficiency, cost and work quality of sandblasting.

• Consider the nozzle material. Steel nozzles are the most common type for general-purpose blasting. Aluminum nozzles are lighter and cheaper than steel nozzles, but they are not as durable. Carbide nozzles are the most durable type of nozzle, but they are also the most expensive.
• Choose the nozzle size. Nozzle size is determined by the diameter of the nozzle opening. The smaller the nozzle opening, the higher the pressure and speed of the abrasive blasting. Nozzles with smaller openings are generally used for surface preparation, while nozzles with larger openings are used for cleaning and descaling.
• Choose the type of abrasive. The type of abrasive you use will also affect the nozzle size you need. Harder abrasives (such as steel grit, corundum) require boron carbide or tungsten carbide nozzles
• Consider the blasting pressure. The blasting pressure is the amount of force used to push the abrasive through the nozzle. The higher the blasting pressure, the more intense the blasting process. High-pressure sandblasting (above 0.6MPay) requires the use of highly wear-resistant materials

Precautions
Safety protection: Wear goggles and dust masks when sandblasting
Matching equipment: The nozzle diameter needs to match the air compressor flow and the sandblasting machine pressure
Regular inspection: Replace when the wear exceeds 10% of the original diameter, otherwise it will affect the efficiency