Hazardous location

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I have a new customer who is installing a sugar packaging line, would this be considered a hazardous location? If so what class and division and where would one find this information?
 

cadpoint

Senior Member
Location
Durham, NC
Sugar is realy big business!

Savannah is a big mill town, for most independant sugar sales from the East Coast, and the West Indias; LA, and Texas are also big millers and processors.

In most cases it will be based on the exact process of what your doing with the sugar, it would get into State Health Requirements if for human comsumption.

This might SITE might help greatly, locating both like machinary and regional based manufactures of equipment!

I know I eat to much of the Stuff! :)
 
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sgunsel

Senior Member
Sugar dust is combustioble and can therefore lead to explosions. There is currently a big push by OSHA and CSB to emphasize dust explosion hazards, resulting from a recent sugar mill explosion. There will definitely be classified areas and they should be delineated by an expert - this is definitely a serious project.
 

rbalex

Moderator
Staff member
Location
Mission Viejo, CA
Occupation
Professional Electrical Engineer
The first thing to consider is its form - is it granulated or powdered? In the powdered form, it is Class II, Group G, T2 . It is potentially, but not necessarily, Class III in the granulated form. In any case it can burn, but only in the powdered form is it likely to be explosive. Note most granulated processes still produce some powdered sugar; the amount and housekeeping usually determine the level of hazard.

As usual, it doesn't mean that the granulated form can be ignored - even if it isn't Class II or III, but the protection techniques are usually different and it isn't subject to as many ignition sources. For example, static sparks can readily ignite powdered sugar in suspension, but it is usually more difficult with granulated. Typically, static discharge will melt and carbonize granulated sugar, but not actualy ignite it unless it is permitted to continue for a fairly long time since sugar has a high ignition temperature in either form.

NFPA 499, is the general Standard for classifying Class II materials and locations. It notes the many considerations that should be reviewed. It isn't a particularly long Standard - about 20 pages, a lot of which is reference tables and diagrams (but still read the text). It can be reviewed on-line, but you should have someone familiar with both it and the packaging line process properly document the location. It's a requirement anyway [500.4(A)]
 
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