we have LPG spherical Tank and we want to install DP Xmtr
for level measurement.below are the physical measurements
Total height of tank is 1850 mtr but 0% level is 1000mm
above bottom and 100% level is 450 below upper side.What is
the LRV and URV and please mention the formula .The SG of
LPG is 0.53 and Wet Leg method will be used.

Answers were Sorted based on User's Feedback



we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / bill arbour

If the height of this spherical tank is 1850 meters, then
it has got to be the biggest spherical tank in the world.
It would be almost 2 Kms high. Check your numbers.

Is This Answer Correct ?    8 Yes 1 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / jabi

suppose the total height of tank is 18.5 mtr
LRV= 1mtr above from ground
URV= 14 mtr above from the ground(4.5mt below the top heigt)
Low pressure side total height= 13mtr

Differential pressure at LRV:
P(high)= height x SG
= 1 mtr x 0.53
= 530 mmWC
P (low)= 13 mtr x 0.53
= 6890 mmWC

LRV is equal to P(high)-P(low)
= 530-6890
= -6360 mmWC

Differential Pressure at URV:
P(high)= 14mtr x 0.53
= 7420 mmWC
P(low)= 13 mtr x 0.53
= 6890 mmWC

URV is equal to P(high)-P(low)
= 7420-6890
= 530 mmWC

Is This Answer Correct ?    4 Yes 0 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / ghalib

first the question is not clear,the total height of the
tank given in mtr(1850)but the 0% is above 1000mm,ok,but
100% level is 450 below upper side,(this 450 is in what-mm
or meter,pls make it clear

Is This Answer Correct ?    3 Yes 1 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / imran

Mr Ghalib Its 450mm below upper side.

Is This Answer Correct ?    2 Yes 1 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / chinna babu

LRV=(1m * 0.53) -(18.5 m *0.53)

URV= (14 m * 0.53)- (18.5 m *0.53)

Is This Answer Correct ?    1 Yes 0 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / imran

It is 18.50mtr

Is This Answer Correct ?    0 Yes 0 No

we have LPG spherical Tank and we want to install DP Xmtr for level measurement.below are the phys..

Answer / nestor

let us consider at 100% 450meters upper side so the wet leg measures:
1850 - (450 meter + 1 meter) = 1399 meter
so height(specific gravity) = 1399 (0.53) = 741.47 meter
span = URV-LRV
LRV = 1 meter(0.53) = 0.53 meter
so URV = span+LRV = 741.47 + 0.53 = 742 meter

Is This Answer Correct ?    0 Yes 3 No

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