Work(Operation Maintenance)) 4. Ball mill 1. Rotating Machineries 2. Confined space 3. Electrical hazard 4. Noise Adherence to shutdown system/ PTW during maintenance (Refer SG03: Safety Guidelines for working in confined space. SG18: Management of PPE, SG19: Safety Guidelines for Material Handling, SG01: Safety Guideline on storage, handling use of gas cylinders,SG04: Safety ...