What is the sandblasting pressure range?

• A. 30-60 psi
• B. 120-180 psi
• C. 60-120 psi
• D. 180-240 psi

Answer: (C)

Sandblasting relies on blast energy produced by compressed air pushing abrasive media at a certain velocity. The pressure must be high enough to overcome coatings and corrosion but not so high as to damage the substrate or wear the equipment. For most standard blasting tasks, the practical range is 60 to 120 psi. Pressures at the lower end (around 30–60 psi) are typically too weak to remove coatings efficiently. Pressures well above about 120 psi can etch or gouge softer substrates, increase dust and media rebound, and may exceed equipment ratings. The exact setting depends on the media type and surface, but 60–120 psi provides a safe, versatile balance for many common applications.