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This formula is for calculating the pressure drop in a leg of the gas piping system with system pressure less than 1.5 psig (41.55 "wc)

NOMINAL SIZE/ACTUAL SIZE .5/.622 .75/.824 1/1.049 1.25/1.380 1.5/1.610 2/2.067 2.5/2.469 3/3.068 4/4.026 6/6.065 8/7.981 10/10.020

Q 350 :

IP 6.659 :

D 1.380 :

L 100 :

Given

Q 2313 D 2.623^* PD Cr L * / (0.541^* ≡

PD 15 :

Cr 0.609 :

PRESSDROP 0.341 :

OP IP PRESSDROP - :

OP 6.318

Pressure drop "PRESSDROP" is in inches of water column Length "L" is in feet Flow "Q" is cfh Diameter "D" is in inches

ASSUMPTIONS and CONCLUSIONS Actual lineal feet from meter to appliance is 200'.Fitting allowance of 100' is included in calculations.1" 90 have an equivalent length of 3'/90, therefore we have allowed for 33 90's in our calculations. Actual minimum required inlet pressure at the appliance is 5" wc per attached manufacturer's cut sheets.Calculated delivery pressure is 5.708" wc..Additionally we can increase the meter delivery pressure to 13.5" wc and still not exceed the maximum allowable inlet pressure to this piece of equipment.At 13.5" wc meter delivery pressure we will still have circuit pressure drop of 1.292" wc leaving an appliance inlet pressure of 12.208" wc.Under either circmstances we are still in compliance with the manufacturers guidelines.