ngoro project rev.pdf
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7/26/2019 NGORO PROJECT REV.pdf
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8/26/2014CALCULATION ORIFICE
PT. Perusahaan Gas Persero Tbk Project NGORO
AGA Orifice Plate - Concentric - Flange Taps - Gas Flow
Tag number TBA
Input data
Gas mixture components
98.781% Methane, 0.3874% Ethane, 0.1605% Propane, 0.0261% Butane-n, 0.0428% Butane-Iso,
0.0061% Pentane-n, 0.0119% Pentane-Iso, 0.0076% Hexane-n, 0.2019% Carbon Dioxide,
0.3747% Nitrogen,
Maximum gas flow 20 Msft3/d
Norm flow @ 60F 10 Msft3/d
Meter inlet pressure 334 psig
Differential range 200 inH2O
Flow temperature 80.6 degF
Molecular weight 16.2881
Cp/Cv specific heat ratio 1.39
Viscosity @ FTP .013 cp
Pipe inside diameter 7.981 in
Density @ FTP 1.02101 lb/ft3
Critical pressure psia
Critical temperature degR
Base pressure 14.73 psia
Base temperature 60 degF
Barometric pressure 14.73 psia
Element material 316 stainless steel
Pipe material Carbon steel
Output data
Orifice dia @ 68degF 3.38331 in
Beta ratio .42392
Normal flow differential 50 inH2O
Uncertainty percent .5951 percent
Reynolds number 1090604
Max pressure loss 158.5 inH2O
Max power loss 14.64 hp
Minimum plate thickness .125 in
Thermal expansion factor 1.0001
Discharge coefficient .601311
Gas expansion factor .998433
Base pressure factor .997688
Base temperature factor 1.00193
Modified volume English
Source - The American Gas Association. AGA5 AGA8 AGA8
InstruCalc Ver.8.1.7.
Notes