7 Controlling Utilities And Building Systems Flashcards
Natural Gas control valve configuration for larger occupancies
May be on horizontal or vertical feed to meter, maybe rectangular quarter turn, may be larger square nut turned with wrench.
In many large industrial properties, gas meters are located where
Inside underground vaults or in utility rooms inside building.
Dot erg recommended distance from possible Bleve
At least 1/2 mile
On large fixed installation horizontal lpg tanks, control valves may be located where
Side of tank or in manifold box at the end
Where lpg tanks are grouped together horizontally, the flow may be controlled fro. Where
Controlled from central manifold location
Oil tanks may be mounted above ground on stanchions to increase
Flow pressure from gravity
Jurisdictions usually require above ground oil and to be protected by
Surrounding with earthen dike or other containment means
Bleve in a fuel oil tank is
Not common but possible
Oil pressure in boiler atomizer for maximum efficiency
600-1000 psi
If the oil tank gate vale is inoperable or inaccessible how can you stop flow of oil
Crimp line. With pliers or hydraulic tool
During white ghost (amazed fuel oil atmosphere) emergency what should be done
Evac building, shut off emergency power switch, vent, eliminate ignition sources, avoid entering vapor cloud
Approaching scene of possible leak in apparatus should be done from where
Upwind, apparatus is possible ignition source. Stage as much as a block away
Dot erg recommended staging distance for gas leak
160-330 feet
In determining a perimeter distance, a safe distance is a judgement made by who
By the IC based on information gathered and accurate assessment of hazard.
A perimeter should be marked with
Caution or fire line tape.
If firefighters established the initial perimeter, who should they pass control of the perimeter to asap
Law enforcement
Most common fuel control problem faced during structure fire
Securing gas utility
One way of establishing a control zone for gas leak
Move with cgi from a point with no readings toward suspected leak sampling at frequent intervals until reading registers.
Natural gas leas should be metered at what elevation
Waist high and up