Critical Zone in Floating Roof Tank
Critical Zone in Floating Roof Tank
(OP)
Hi,
Can somebody explain what is the critical zone in a floating roof tank. Why it is Critical.
Thanks,
PKing
Can somebody explain what is the critical zone in a floating roof tank. Why it is Critical.
Thanks,
PKing





RE: Critical Zone in Floating Roof Tank
RE: Critical Zone in Floating Roof Tank
RE: Critical Zone in Floating Roof Tank
Thanks for your responses. However, in the mean time I got a clue on critical zone that when floating roof lands on its legs then in this zone the tank volume calibration is very difficult. Due to this reason this area is termed "Critical Zone" ??
RE: Critical Zone in Floating Roof Tank
Surely you mean the product volume since the volume under the roof is easily calculated (Height of legs times the tank plan area)
RE: Critical Zone in Floating Roof Tank
In tank calibration reports, volume will be given for each mm of gauge height (liquid level is measured by Radar or floating level gauge or manual dip).
When the floating roof starts floating, the volume of the liquid inside the tank cannot be measured accurately. Because the volume of displaced liquid by the floating roof for an assumed specific gravity of liquid may change when the roof just starts to float. So this zone is called as critical zone.
Jeyan