Free shuttle to visit the factory
If you want to learn about our products , please call or write mail consultation.
Silica flour silicosis crystalline silica 81 137 ,sio where: mg sio milligrams of silica per cubic meter of air sio the percentage of silica in the respirable dust.. for example, the calculated federal standard for silica flour that is essentially 100% respirable silica is 0.10 mgm 3.. In 1974 niosh recommended that the exposure limit for respirable crystalline silica be 0.05 mgm averaged over a work shift of up to
We provide quality and efficient solutions to our global customers