Abrasive Blast Air and Abrasive Consumption
Nozzle air-flow (cfm), compressor horsepower, abrasive consumption (lb/hr), and total abrasive for an area from the nozzle bore and blast pressure.
Formula and source
cfm = base_cfm(bore) x pressure/100; compressor_hp = cfm / 4; abrasive_lb_hr = base_lb_hr(bore) x pressure/100; abrasive_lb = area x lb_per_ft2; tons = lb / 2000.
SSPC / AMPP surface-preparation (SP) specifications and the nozzle manufacturer's air / abrasive chart by name; representative nozzle values at 100 psi.
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