There is no established size of vessel below which explosion relief vents are not required. In each case the consequences of an explosion need to be considered. The factors to take into account are set out – see below:
Link: http://www.hse.gov.uk/food/dustexplosionapp2.htm
Keep up good work!
Arpad
Manual says: “Explosive atmospheres Charging or using Apple Watch in any area with
Operators and planners of process systems and plants in a wide range
In a possible hazardous atmosphere only devices, equipments, power and working machines
skid-or-machine? assembly-or-machine? technology-or-machine?
Interesting questions, specially if you are about to run a multi-billion USD value technology, and it turns out to be a machine rather than a technology / installation / assembly.
#exprofessional #exownersengineering #exownersengineer #excompliance #excomplianceengineering #excomplianctodesignstage
arpadveress 
