Vent Sizing _Spreadsheet

Line Sizing (Metric) Line number:

Vent Line

Liquid (L) or Vapour (V)?

V

Flow Rate:

11468.5 kg/hr

Pressure:

0.14 Barg

Temperature:

Molecular Wt

15 Deg C

Viscosity:

Molecular Wt

22.00

Compressibility (Z) Compressibility (Z)

1.00

Vapour Density

1.060

0.01 cP

War n in g - To tal DP > 10% in let p r es s u r e!

Warning-20% margin added to line length

Us e c o m p r es s ib le flo w c alc u lato r ! Warning - Piping DP greater than 10% Pipe Material:

CS

Recommended Sched:

40

Next size down

Selected size

Pipe Nominal Diameter:

Roughness e:

8 in.

0.0457 mm. Next size up

10 in.

12 in.

Schedule:

40

40

40

Pipe Internal Diameter

203 mm.

255 mm.

303 mm.

Equiv. L

Equiv. L

Equiv. L

Tees (Run)

0

0.00 m.

0.00 m.

Tees (Branch)

0

0.00 m.

0.00 m.

0.00 m.

8

21.95 m.

29.26 m.

34.14 m.

o

90 Elbows LR o

90 Elbows SR

0.00 m.

0

0.00 m.

0.00 m.

0.00 m.

45 Elbows

2

3.66 m.

4.27 m.

5.49 m.

Gate/FB Ball Valves

0

0.00 m.

0.00 m.

0.00 m.

Globe Valves

0

0.00 m.

0.00 m.

0.00 m.

Plug Valves

0

0.00 m.

0.00 m.

0.00 m.

Swing Check Valves

0

0.00 m.

0.00 m.

0.00 m.

Std Contract d/D=0.5

0

0.00 m.

0.00 m.

0.00 m.

Std Contract d/D=0.75

0

0.00 m.

0.00 m.

0.00 m.

Std Enlarge d/D=0.5

0

0.00 m.

0.00 m.

0.00 m.

Std Enlarge d/D=0.75

0

0.00 m.

0.00 m.

0.00 m.

Vessel Entry

1

14.63 m.

18.90 m.

23.77 m. 11.89 m.

o

Vessel Exit Actual Pipe L, m.

1

7.32 m.

9.45 m.

60

72.00 m.

72.00 m.

72.00 m.

119.55 m.

133.87 m.

147.29 m.

Total Equiv. L, m. Reynolds Number: Darcy Friction Factor f : Pressure Drop/100 m. Total Piping Pressure Drop Velocity

2,002,716

1,595,177

1,338,890

0.0145

0.0141

0.0139

0.33 Bar

0.10 Bar

0.04 Bar

0.39 Bar 93.15 m/sec

0.14 Bar 59.10 m/sec

0.06 Bar 41.63 m/sec

8 in.

10 in.

12 in.

Equipment Pipe Nominal Diameter:

dP Control valve

Note 1

dP

dP

0

0.00 Bar

0.00 Bar

0.00 Bar

Flow meter (0.3 bar)

0

0.00 Bar

0.00 Bar

0.00 Bar

Heat exchanger (0.7 bar)

0

0.00 Bar

0.00 Bar

0.00 Bar

Air fin cooler (0.7 bar)

0

0.00 Bar

0.00 Bar

0.00 Bar

Orifii (0.3 bar)

0

0.00 Bar

0.00 Bar

0.00 Bar

Others (bar)

0

0.00 Bar

0.00 Bar

0.00 Bar

0.00 Bar 0.39 Bar

0.00 Bar 0.14 Bar

0.00 Bar 0.06 Bar

Equipment pressure drop Total Pressure Drop (line + eqpt)

Compressible Flow calculation method from Crane TP410 8"

10"

Pressure Drop

bar

0.394

0.137

0.062

Pressure Ratio

Delta Pg/Pa

0.280

0.119

0.058

Expansion Factor (From A-22 Crane Y TP410)

0.88

0.95

0.98

Total Resistance Coefficient

9.76

8.67

8.02

0.758

0.758

0.758

Kt

Sg

12"

Density of gas at inlet pressure

Kg/m3

1.29

1.06

0.99

Blowdown Capacity, Qh

Sm3/hr

1.124E+04

1.083E+04

1.070E+04

BlowdownCapacity

MMSCFD

9.528

9.18

9.07