DUST REMOVAL FROM WORK CLOTHES - with compressed air nozzle

June 2008 - June 2009

Background

The framework directives from the Norwegian Labour Inspection Authority from 1978 did prohibit open clean blowing of work clothes. A working group discussed several alternatives to solve the problem. 
Conclusion

A simple and serviceable method was not found that could be a satisfactory alternative to blow the work clothes clean with a simple air pressure nozzle. The conclusion is that blowing work clothes clean with an air pressure nozzle may take place without increasing the health risk for the workers on following the conditions:

  • The air pressure upstream the blowing nozzle should not exceed 2,1 bar.
  • The workers should use dust masks during the clean blowing and eye protection if the dust consists of sharp particles.
  • Clean blowing shall take place outdoors or at places where clean blowing does not contribute to increase the dust concentration.