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DOMESTIC SERVICE LINES (3/4”)

EXPERIMENTAL MEASUREMENT OF GAS LOST (WITH METER)

Gas lost during purging of one short S/L (Uncorrected) = 11.92 CFT for 30 seconds

Gas lost during purging of 

service lines as measured with meter

in the presence of Audit personal(Site: Askari X, block B, Near Alama Iqbal Air Port)

Correction factor (for pressure 28 psig) = (28+14.65) / 14.65

= 2.91

Gas lost during purging of one short S/L (Corrected) = 11.92 * 2.91 = 34.7 CFT

THEORATICAL MEASUREMENT OF GAS LOST:

Gas lost during purging = P * D2 

Pressure „P‟ = 28 psig

Hole of dia „D‟ = 0.3125 inches

Gas lost during purging = 28 * (0.3125)2

= 2.73 MCFH

Gas lost during purging = 22.78 CFT for 30 secondsof one ¾ “ service line 

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COMMERCIAL SERVICE LINES (1”) 

EXPERIMENTAL MEASUREMENT OF GAS LOST (WITH METER)

Gas lost during purging of one S/L = 65 CFT for 30 second (Uncorrected)

Gas lost during purging of 

service lines as measured with meter

in the presence of Audit personal

(Site: Jamia Ghazalia, Patiala Ground, Hall Road Lhr.)

Correction factor (for pressure 35 psig) = (35+14.65) / 14.65

= 3.39

= 65 * 3.39

Gas lost during purging of one S/L = 220.35 CFT (Corrected)

THEORATICAL MEASUREMENT OF GAS LOST:

Gas lost during purging = P * D2

 

Pressure „P‟ = 35 psig

Hole of dia „D‟ = 0.75 inches

Gas lost during purging = 35 * (0.75)2

= 19.68 MCFH

Gas lost during purging = 164 CFT for 30 seconds

of single 1 “ service line

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INDUSTRIAL SERVICE LINES (2“) 

EXPERIMENTAL MEASUREMENT OF GAS LOST (WITH METER)

Gas lost during purging of one 2” dia S/L = 6.93 m3 for 60 second (Uncorrected)

Gas lost during purging of 

2 “ service lines as measured with meter  

in the presence of Audit personal

(Site: FAS TUBE, SUNDER INDUSTRIAL STATE)

= 244.49 CFT

Correction factor (for pressure 60 psig) = (60+14.65) / 14.65

= 5.09

= 244.49*5.09

Gas lost during purging of one S/L = 1242.42 CFT (Corrected)

THEORATICAL MEASUREMENT OF GAS LOST:

Gas lost during purging = P * D2 

Pressure „P‟ = 60 psig

Hole of dia „D‟ = 1.5 inches

Gas lost during purging = 60 * (1.5)2

= 135 MCFH

Gas lost during purging = 2250 CFT for 60 seconds

of single 1 “ service line

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Type of 

Connection

Total Number of 

Service Lines Laid

During the Period

Jan. 2009-Aug.2009

Gas lost per

Connection

During

Purging

Gas Consumed in

Packing of 

Pipeline Per

Connection

Gas lost

Per

Connection

Total Gas Lost During

the Period

Jan. 2009 Aug.2009

A B C B+C A*(B+C)

Nos. CF CF CF MCF

Domestic 36532 34.7 0.234 34.93 1276.06

Commercial 1140 220.35 0.416 220.766 251.673

Industrial 111 1242.42 3.66 1246.08 138.31

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1” Ø MS PIPELINE:

EXPERIMENTAL MEASUREMENT OF GAS LOST (WITH METER)

Gas lost during purging of 457 meter 1” pipeline = 160 CFT for 3minutes

As measured by I-7M meter in the presence

of Audit personal.

(Site: Askari X, block B, Near Alama Iqbal Air Port)

Gas lost per meter length of 1” pipeline = 0.35 CFT

Diameter

of 

pipeline

Total Length of 

Pipeline Commissioned

During the Period

Jan.2009-Aug.2009

Gas lost Per Unit

length of 

Pipeline

During Purging

Gas lost Per

Unit length of 

Pipeline

During Packing

Gas lost Per

Unit Length

of Pipeline

Total Gas

Lost

1ӯ448165.9

0.35 0.0351

51.62292+1

56.85806

208.48

2ӯ 224572 25.24 0.111 25.35 5693.12

4ӯ 135746.05 89.26