Hydraulic Calculation of Sprinkler System(Rev.c)

SOUTH ASIA PAKISTAN TERMINALS LIMITED (SAPT)

PAKISTAN DEEP WATER CONTAINER PORT

BUILDINGS PHASE-1

HYDRAULIC CALCULATION OF SPRINKLER SYSTEM

- GROUND FLOOR PLAN OF CRANE WORKSHOP

Date: Dec. 2014

Rev:C

Document No. Prepared by Checked by Approved by

Liu Yi Mao Xiaofang Zhong Liangsheng


CONTENTS

1. BRIEF INTRODUCTION ...................................................................................... 1

1.1. General ....................................................................................................... 1

1.2. Codes and Standards ................................................................................. 1

2. HYDRAULIC CALCULATION OF SPRINKLER SYSTEM .................................. 2

2.1. The Extreme Pressure Point ....................................................................... 2

2.2. Flow of Node .............................................................................................. 2

2.3. Flow Rate ................................................................................................... 2

2.4. Frictional Resistance .................................................................................. 2

2.5. Difference of Pressure ................................................................................ 2

2.6. The Results ................................................................................................ 3

ANNEX A. DETAIL HYDRAULIC CALCULATION OF SPRINKLER SYSTEM ...... 5

ANNEX B. FIGURE OF SPRINKLER SYSTEM ...................................................... 8


1

1. BRIEF INTRODUCTION

1.1. General

1) This hydraulic calculation of sprinkler system is for crane workshop of Pakistan Deep Water Container Port.

2) Galvanized steel pipe (meets the requirements of ASME B36.10M-2004 Welded and Seamless Wrought Steel Pipe) is adopted as the sprinkler system of this design. Standard (STD) wall thickness is adopted as the wall thickness of the pipe in this design.

3) HDPE pipe (meets the requirements of BS EN 12201-1-2003 Plastics Piping Systems for Water Supply-Polyethylene (PE) ) is adopted as the buried pipe in fire fighting system.

1.2. Codes and Standards

1) NFPA 13-2007 Standard for the Installation of Sprinkler Systems

2) ASME B36.10M-2004 Welded and Seamless Wrought Steel Pipe.

3) BS EN 12201-1-2003 Plastics Piping Systems for Water Supply-Polyethylene (PE)


2

2. HYDRAULIC CALCULATION OF SPRINKLER SYSTEM

2.1. The Extreme Pressure Point

According to requirements of NFPA 13-2007. 1.0 bar will be adopt as the extreme pressure point at the remotest of the pipe in this design.

2.2. Flow of Node

Pressure balancing shall be permitted through the use of a K-factor developed for branch lines or portions of systems using:

0.5/ ( )pK q p (1)

So the equation can change as:

0.5( )pq K p (2)

Where:

q= flow of node in L/min;

Kp= K-factor, for this project, Kp=80;

p=pressure of point in bar.

2.3. Flow Rate

21000 / / 0.785 / 60iv Q D (3)

Where:

V=flow rate in m/s;

Q= flow of pipe in L/min;

Di= internal diameter in mm;

2.4. Frictional Resistance

Pipe friction losses shall be determined on the basis of the Hazen-Williams formula, as follows:

1.855

1.85 4.87

Q6.05( )10m

m

pC d

(4)

Where:

pm= frictional resistance in bar per meter of pipe;

Q= flow in L/min;

C= friction loss coefficient, for galvanized steel pipe of this project, C=120;

dm= actual internal diameter in mm.

2.5. Difference of Pressure

( ) /10m eP p L L H (5)


3

Where:

P= difference of pressure in bar;

pm= frictional resistance in bar per meter of pipe;

L= length of Pipe in m;

Le = equivalent length in m;

H= difference of level in m.

The figure of density/Area Cruves is as follow:

Figure 1 Density/Area Curves

2.6. The Results

Table 1 The results of the hydraulic calculation for crane workshop

Hydraulic Calculations

for

CRANE WORKSHOP GROUND FLOOR

Date: 9-12-2014

Design

Occupancy classification Ordinary Hazard Group II

Density 9.45 mm/min

Area of application 254 m2

Coverage per sprinkler 7.12 m2

Special sprinklers -----------

No. of sprinklers calculated 34


4

In-rack demand -----------

Hose streams 250 gpm (946 L/m)

Total water required including hose streams 883 gpm (3346 L/m)

According to the NFPA 13, the sprinkling density of this building is ordinary hazard

Group 2.In figure 1, When the calculated area is 254 m2, the average sprinkling density is not less than 7.2 mm/min. So the design parameters can meet the requirements of the standard, and it is acceptable.

For the detailed hydraulic calculation of sprinkler system refer to Annex A.

For the figure of sprinkler system refer to Annex B.

5

ANNEX A. DETAIL HYDRAULIC CALCULATION OF SPRINKLER SYSTEM

Table 2 Hydraulic calculation of sprinkler system

Node Pressure of

Node(p) Flow of Node(q)

Pipe Section Number

Flow of Pipe(Q)

Flow Rate(v)

Nominal Diameter

(Dn)

Internal Diameter

(Di)

Length of

Pipe(L)

Equivalent Pipe

Length (Le)

Friction Loss Coefficient

( C )

Difference of Level

(H)

Difference of Pressure

(P)

(bar) (L/min) (L/min) (m/s) (mm) (mm) (m) (m) (m) (bar)

1 0.5350 58.515 1~2 58.515 1.751 25 26.64 2.8 0.0 120 0.0 0.0512

2 0.5862 61.253 2~3 119.767 2.066 32 35.08 2.8 0.0 120 0.0 0.0505

3 0.6367 63.834 3~4 183.602 2.326 40 40.94 2.8 0.0 120 0.0 0.0524

4 0.6891 66.410 4~5 250.011 1.927 50 52.48 2.8 0.0 120 0.0 0.0277

5 0.7168 67.731 5~6 317.742 2.449 50 52.48 0.8 0.0 120 0.0 0.0118

6 0.7285 0.000 6~12 317.742 2.449 50 52.48 2.95 1.5 120 0.0 0.0686

12 0.7971 0.000

7 0.5850 61.188 7~8 61.188 1.831 25 26.64 2.8 0.0 120 0.0 0.0556

8 0.6406 64.032 8~9 125.220 2.160 32 35.08 2.8 0.0 120 0.0 0.0548

9 0.6954 66.714 9~10 191.934 2.431 40 40.94 2.8 0.0 120 0.0 0.0569

10 0.7523 69.390 10~11 261.324 2.015 50 52.48 2.8 0.0 120 0.0 0.0300

11 0.7824 70.762 11~12 332.086 2.560 50 52.48 0.8 0.0 120 0.0 0.0128

12 0.7951 0.000 12~18 649.827 3.512 65 62.68 3.3 3.7 120 0.0 0.1706

18 0.9658 0.000

13 0.7100 67.409 13~14 67.409 2.017 25 26.64 2.8 0.0 120 0.0 0.0666

14 0.7766 70.498 14~15 137.907 2.379 32 35.08 2.8 0.0 120 0.0 0.0655

15 0.8421 73.411 15~16 211.318 2.677 40 40.94 2.8 0.0 120 0.0 0.0680

16 0.9100 76.317 16~17 287.635 2.217 50 52.48 2.8 0.0 120 0.0 0.0359

17 0.9459 77.807 17~18 365.442 2.817 50 52.48 0.8 0.0 120 0.0 0.0152

18 0.9612 0.000 18~24 1015.269 3.496 80 78.52 3.3 4.6 120 0.0 0.1467

24 1.1079 0.000

6

19 0.8280 72.796 19~20 72.796 2.178 25 26.64 2.8 0.0 120 0.0 0.0767

20 0.9047 76.094 20~21 148.889 2.569 32 35.08 2.8 0.0 120 0.0 0.0755

21 0.9802 79.204 21~22 228.094 2.889 40 40.94 2.8 0.0 120 0.0 0.0783

22 1.0585 82.307 22~23 310.401 2.393 50 52.48 2.8 0.0 120 0.0 0.0413

23 1.0998 83.898 23~24 394.299 3.040 50 52.48 0.8 0.0 120 0.0 0.0175

24 1.1173 0.000 24~41 1409.568 2.862 100 102.26 1.65 6.1 120 0.0 0.0730

41 1.1903 0.000

25 0.7950 71.330 25~26 71.330 2.134 25 26.64 2.8 0.0 120 0.0 0.0739

26 0.8689 74.572 26~27 145.902 2.517 32 35.08 2.8 0.0 120 0.0 0.0727

27 0.9416 77.629 27~28 223.531 2.832 40 40.94 2.8 0.0 120 0.0 0.0754

28 1.0170 80.678 28~29 304.209 2.345 50 52.48 2.8 0.0 120 0.0 0.0398

29 1.0568 82.242 29~30 386.450 2.979 50 52.48 0.8 0.0 120 0.0 0.0177

30 1.0745 0.000 30~41 991.110 3.413 80 78.52 1.65 4.6 120 0.0 0.1110

41 1.1856 0.000

31 0.7000 66.933 31~32 66.933 2.002 25 26.64 2.8 0.0 120 0.0 0.0657

32 0.7657 70.003 31~33 136.936 2.363 32 35.08 2.8 0.0 120 0.0 0.0646

33 0.8303 72.898 31~34 209.834 2.658 40 40.94 2.8 0.0 120 0.0 0.0671

34 0.8974 75.787 31~35 285.621 2.202 50 52.48 2.8 0.0 120 0.0 0.0354

35 0.9329 77.268 31~36 362.889 2.797 50 52.48 0.8 0.0 120 0.0 0.0158

36 0.9486 0.000 31~37 604.660 3.268 65 62.68 2.3 3.7 120 0.0 0.1280

30 1.0766 0.000

37 0.5000 56.569 37~38 56.569 1.692 25 26.64 2.8 0.0 120 0.0 0.0481

38 0.5481 59.228 38~39 115.797 1.998 32 35.08 2.8 0.0 120 0.0 0.0474

39 0.5955 61.736 39~40 177.533 2.249 40 40.94 2.8 0.0 120 0.0 0.0493

40 0.6448 64.239 40~36 241.772 3.063 40 40.94 6.0 3.6 120 0.0 0.2990

36 0.9438 0.000

7

41 1.1903 0.000 41~42 2400.678 4.874 100 102.26 2.3 13.5 120 5.0 0.8984

42 2.0887 0.000 42~43 2400.678 2.147 150 154.08 44.0 17.2 120 10.0 1.2096

43 3.2982 0.000 43~44 2400.678 2.979 160 130.8 25.0 8.6 150 0.0 0.1691

44 3.4673 0.000

Remark: The difference of level for pipe section number 41~42 (5 m) is the loss of the zone control valve. This calculation sheets indicate that the flow of this system is 2400.678L/min(40.01 L/s), the pressure of node 44 which is connected with underground fire fighting pipe is 3.4673 bar (34.67 mH2O).

8

ANNEX B. FIGURE OF SPRINKLER SYSTEM

Figure 2 Sprinkler system

Remark:The calculated area of this building is 254 m2.

Documents

Hydraulic Calculation of Sprinkler System(Rev.c)