Table of Content 1

1. Purpose 2

2. Design Basis & Assumption 2

3. Reference 2

4. Attachment 2

5. Computation 2

6. Result & Conclusion 3

Sheet1

PP7 EXTENSION 3 PROJECT

GT SERVICES PIPING SIZING & PRESSURE DROP

TABLE OF CONTENTS

SAR687-XW01-OOMB-B22350 REV APP7 Extension 3 Project - Units 23 & 24GT SERVICES PIPING SIZING & PRESSURE DROP

1. PURPOSE

1.1 To calculate the line size and pressure drop for the supply of fuel gas to the GT units.

1.2 To calculate the line size and pressure drop for the supply of fuel oil to the GT units.

1.3 To calculate the line size and pressure drop for the supply of DM water to the GT units.

1.4 To calculate the line size and pressure drop for the fire protection and detection system to the GT units.

1.5 To calculate the line size and pressure drop for the supply of compressed air to the GT units.

1.6 To calculate the line size and pressure drop for the lube oil mist eleminator from the GT units.

1.7 To calculate the line size and pressure drop for the GT vent discharges.

2. DESIGN BASIS & ASSUMPTION

2.1

2.2

2.3

2.4

2.5

2.6

3. Reference

3.1

3.2

3.3

3.4

3.5 Flow Diagram : GT Services, Dwg No: SAR687-XG07-00SG-B21600 Rev-A (Attachment 4.1)

3.6 Calculation Industrial & Oily water Drainage equipment & pipe line sizing (Doc No SAR687-XW01-OOGM-B22200, Rev A)

3.7 Calculation Fire fighting system & pipe line sizing (Doc No SAR687-XW01-OOSG-B22100, Rev B)

3.8 Calculation Fuel oil system equipment & pipe line sizing (Doc No SAR687-XW01-OOEG-B22050, Rev D)

3.9 Calculation Gas system equipment & pipe line sizing (Doc No SAR687-XW01-OOEK-B22000, Rev C)

3.10 Calculation Water supply system equipment & pipe line sizing (Doc No SAR687-XW01-OOGH-B22150, Rev A)

3.11 Calculation Compressed air system pipe line sizing & pressure drop (Doc No SAR687-XW01-OOSCB-B22550, Rev A)

4. Attachment

4.1 Flow Diagram : GT Services, Dwg No: SAR687-XG07-00SG-B21600 Rev-A (1 page)

4.2 Extract of Crane Hand Book for D'arcy formula (2 pages).

4.3 Schematic pipe layout sketch (1 page)

4.4

5. Computation 5.1 Calculation of pipe line size and pr. Drop for the vapour extractor discharge (MBV 003)5.1.1 Calculation of line size for the vapour extractor discharge (MBV 003)

a Volume flow rate of oily mist to the atmosphere = 600 scfm i.e 1019.41 m3/hr Refer 2.1b Recommended maximum velocity of flow = 20 m/sec Refer 2.3c Flow area required for this section = 0.0142 m2

[ 5.1.1a / 5.1.1b ]d Pipe diameter required in this section = 134.2 mm

[ (5.1.1c X 4 / π )^0.5 ]e Selected pipe size for this section (NB) = 150 mmf Pipe outside diameter (OD) = 168.30 mm (considering sch 40 pipe)g Thickness of the pipe (t) = 7.11 mm (considering sch 40 pipe)

Sheet2

Extract of Customer connection process information doc. No. 22T9830 (1 page)

Per Reference 3.2, the flow of oily mist through the vapour extractor has been considered as 600 scfm in this calculation.

The maximum velocity of the oily mist in the pipe has been considered as 20.0 m/sec for pipe sizing in this calculation.

Per Reference 3.2, the maximum allowable pressure drop in the pipe line for vapour extractor has been considered as 2" of water column in this calculation.

Viscocity of oily mist at room temperature has considered as 0.018 cp in this calculation.

Customer connection process information doc. No. 22T9830 ( Attachment 4.4)

CT Customer piping connections dwg. No. 2364J19

Crane Handbook (Attachment 4.2)

Detail piping layout is yet to be developed, therefore all pipe length have been estimated based on present layout and a margin of 50% over the estimated length has been considered in this calculation for the purpose of pressure drop calculation.

Since the oily mist mainly consists of oil vapour the density of the oily mist has been considered as 0.00122 gm/cc at room temperature and atmospheric pressure in this calculation.

Design Criteria - GT Services ( Doc No: SAR687-XU00-00MB-B20600, Rev-B)

PP7 Extension 3 Project - Units 23 & 24 SAR687-XW01-OOMB-B22350 REV AGT SERVICES PIPING SIZING & PRESSURE DROP

h Actual pipe inside diameter = 154.08 mm i.e 0.506 ft[ 5.1.1f - 2 X 5.1.1g ] i.e 6.066 in

i Actual velocity of the oily mist = 15.18 m/s i.e 49.79 ft/sec i.e < 20.0 m/sec[ 5.1.1a / (π (5.1.1h)^2)/4 ]

5.1.2 Calculation of pressure drop in the common headerAs per D'arcy formula pressure drop in psi is given by Refer 4.2

Pressure drop = ρ X f X L X v2 ….Eq - 1144 X D X 2g

where, ρ = density in lb/cu.ftf = friction factorL = Equivalent length of pipe in ft.v = mean velocity of flow in ft/secD = internal diameter of pipe in ftg = acceleration due to gravity, 32.2 ft/s2

a Density of the fluid assumed = 0.00122 gm/cc Refer 2.6b Viscosity of water at room temperature = 0.018 cp Refer 2.5c Reynolds number = 6.31 X rate of flow in lb/hr Refer 4.2

internal dia in inch X viscosity in centipoise= 158447

Refer 4.2Friction factor of the pipe for water flow = 0.022 (for Reynolds no. >2000)

= 0.00 (for Reynolds no. <2000)Putting the following values in equation 1,

ρ = 0.0012 gm/c.c i.e 0.08 lb/cu.ftf = 0.02200L = 10.0 m i.e 32.80 ft Ref 2.6v = 49.7922 ft/secD = 0.506 ft g = 32.20 ft/s2

d Pressure drop in the vent line = 0.02907 psi i.e 0.80 inch of WC Refer Eq 1

6.0 RESULT & CONCLUSION6.1 Line size and pressure drop for the supply of fuel gas to the GT units.

Refer 3.9

6.2 Line size and pressure drop for the supply of fuel oil to the GT units.Refer 3.8

6.3 Line size and pressure drop for the supply of DM water to the GT units.Refer 3.10

6.4 Line size and pressure drop for the fire protection and detection system to the GT units.Refer 3.7

6.5 Line size and pressure drop for the supply of compressed air to the GT units.Refer 3.11

6.6 Line size and pressure drop for the lube oil mist eleminator from the GT units.150 mm NB Refer 5.1.1e0.80 inch of WC Refer 5.1.2d

6.7 Line size and pressure drop for the GT vent discharges.0.75 inch Refer 3.50.75 inch

Sheet3

REV A

For detail of fuel gas pipe line size & pressure drop refer Calculation Gas system equipment & pipe line sizing

For detail of fuel oil pipe line size & pressure drop refer Calculation Fuel oil system equipment & pipe line sizing

For detail of water supply pipe line size & pressure drop refer Calculation Water supply system equipment & pipe line sizing

For detail of fire fighting pipe line size & pressure drop refer Calculation Fire fighting system & pipe line sizing

For detail of compressed air pipe line size & pressure drop refer Calculation Compressed air system pipe line sizing & pressure drop

Line size considered for the vent (MBH-021)Line size considered for the vent (MBP-002)

PP7 Extension 3 Project - Units 23 & 24 SAR687-XW01-OOMB-B22350GT SERVICES PIPING SIZING & PRESSURE DROP

Pressure drop in the pipe line under BOP scope

From Reynolds no. vs friction factor chart in page 3-9 of CRANE handbook

Line size selected for the vapour extractor (MBV-003)