ISO 11127-2 is part of the test method for non-metallic abrasive cleaning of steel surface preparation sand blasting before painting. This part is the determination of Particle size distribution. The standard specifies the method for determining Non-metallic abrasive Particle size distribution during sand blasting cleaning to ensure abrasive mass and adaptability. The standard specifies experimental equipment, experimental procedures and data processing methods. Specifically, the standard requires the determination of abrasive Particle size distribution under specific conditions using methods such as sieving or Flow velocity analysis, followed by the calculation of abrasive particle size mean and standard deviation.