lpg dispenser
- Thread starter jimalone
- Start date
- Status
physis
Senior Member
Re: lpg dispenser
I think it's class 1 division 1.
From 2002
500.5(B) Class 1 locations are those in which flamable gases or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitible mixtures.
500.5(B)(1) A class 1 division 1 location is a location
(1) in which ignitible concentrations of flamable gases or vapors can exist under normal operating conditions
Edit: I've never once seen my propane tank filled without a cloud of gas escaping.
Edit: I see, Liquified Petroleum Gas,
I don't how that could get mixed up.
[ February 09, 2005, 04:50 PM: Message edited by: physis ]
I think it's class 1 division 1.
From 2002
500.5(B) Class 1 locations are those in which flamable gases or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitible mixtures.
500.5(B)(1) A class 1 division 1 location is a location
(1) in which ignitible concentrations of flamable gases or vapors can exist under normal operating conditions
Edit: I've never once seen my propane tank filled without a cloud of gas escaping.
Edit: I see, Liquified Petroleum Gas,
I don't how that could get mixed up.[ February 09, 2005, 04:50 PM: Message edited by: physis ]
jtester
Senior Member
- Location
- Las Cruces N.M.
Re: lpg dispenser
I don't think the info is in the '99. In the 2002 it is Table 514.3(B)(2)
Jim T
I don't think the info is in the '99. In the 2002 it is Table 514.3(B)(2)
Jim T
stew
Senior Member
- Location
- federal way,washington
Re: lpg dispenser
514.1 It is a class 1 group D environment . The division is then determined by the table in 514.3(B)(1) I have installed many of these devices with pumps on the dispenser and all are class 1 group D which is probably one of the most hazardous locations there is with maybe the exception of gunpowder magazines. Be safe. The result of a spark in a concentration of lpg vapor is called a BLEVE in the trade. BIG LOUD VAPOR EXPLOSION!!!
[ February 09, 2005, 05:12 PM: Message edited by: stew ]
514.1 It is a class 1 group D environment . The division is then determined by the table in 514.3(B)(1) I have installed many of these devices with pumps on the dispenser and all are class 1 group D which is probably one of the most hazardous locations there is with maybe the exception of gunpowder magazines. Be safe. The result of a spark in a concentration of lpg vapor is called a BLEVE in the trade. BIG LOUD VAPOR EXPLOSION!!!
[ February 09, 2005, 05:12 PM: Message edited by: stew ]
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Re: lpg dispenser
Good analysis Sam, although you missed 500.5(B)(3) and Jim is right that Table 514.3(B)(2) didn?t appear until 2002; however, the reference to NFPA 58 (the LPG code) was there and the Table is basically an extraction from that Code.
LPG can be nasty stuff. Its a mixture of gases including butane, an easily ignitible gas that drops like a rock, especially when cold, and then spreads out all over the place.
I?d be very careful reviewing any trenches. Ignitable quantities of butane have been known to travel over a thousand feet.
Add: I should have said "...automotive fuel grade LPG is a mixture of gases..."
[ February 09, 2005, 05:58 PM: Message edited by: rbalex ]
Good analysis Sam, although you missed 500.5(B)(3) and Jim is right that Table 514.3(B)(2) didn?t appear until 2002; however, the reference to NFPA 58 (the LPG code) was there and the Table is basically an extraction from that Code.
LPG can be nasty stuff. Its a mixture of gases including butane, an easily ignitible gas that drops like a rock, especially when cold, and then spreads out all over the place.
I?d be very careful reviewing any trenches. Ignitable quantities of butane have been known to travel over a thousand feet.
Add: I should have said "...automotive fuel grade LPG is a mixture of gases..."
[ February 09, 2005, 05:58 PM: Message edited by: rbalex ]
- Status