Calculating Pipeline Sizes

Boilers and boiler pipeline selection, calculation ! Nice Coice..

The pressure requirement is 4kg/cm² the distribution is around 500 mts

Please STATE your 2 problems precisely and separately.

You will then expect meaningful replies.

Only then!

YOU CAN GET A FREE PIPE SIZER PROGRAM DOWNLOAD ON LINE, OR CONTACT SARCO FOR A COMPLETE SET OF DETAILS CHARTS AND DIAGRAMS. USUALLY I WILL SIZE FOR A 5.2 TO 5.4 FEET PER SECOND FLOW RATE. AT POINT OF ZPD YOU SHOULD BE BELOW 2.25 FPS TO ALOW FOR AIR SEPARATION AND IN THE REST OF THE SYSTEM YOU NEED TO STAY ABOVE 4.75 FPS TO MOVE THE AIR OR GASSES BACK TO THE SEPARATOR. CONTROL AND MIXING VALVES SHOULD BE SIZED FOR A 2-3 PSI PD, YOU CANE GO TO THE KELE WEB SIGHT AND USE THE VALVE WIZARD TO CALCULATE CV AND SIZE THE VALVES. THIS SHOULD PROVIDE THE MOST SATISFACTORY PERFORMANCE WITH THE LEAST PUMP POWER CONSUMPTION AND ELINATE NOISE. I USUALLY START WITH THE FLOW RATES AND PD ON THE CHILLED WATR ON 2 PIPE SYSTEMS. 4 PIPE WILL REQUIRE SEPARATE CALCULATIONS ON BOTH. I LIKE TO RUN A SEPARATE PUMP AND MIXING VALVE ON CHILLED WATER COILS. WITH SIMPLE PID CALCULATIONS BASED ON DEW POINT, YOU CAN GET THE MOST DEHUMIFICATION AT THE LOWEST COST BY MOVING THE WATER THROUGHT THE COIL FAST ENOUGH TO STAY BELOW DEW POINT ALLTHE WAY THROUGH THE COIL RATHER THAN LOWERING THEWATER TEMPERATURE LEAVING YOUR CHILLER WHICH WOULD SERVE TO LOWER YOUR CAPACITY AND RAISE YOU POWER CONSUMPTION. ( LOWER RH- HIGHER COMFORTABLE TEMPERATURE SETPOINT.

can I have the site address were i can down load the program

It's a simple calculation.

As a rule-of-thumb, keep the velocity between 1 and 3m/s for liquids.

One can go a bit higher for gases.

Pipe sizing: water/air/gas

Q = 3.142/4 x A2 x V x 3600/1000000

Q = m3/h

A = mm pipe dia

V = velocity : water 1- 10 kg/cm2 : 1.5 - 3 m/s

air 1- 2 kg/cm2 : 8 - 15 m/s

200-300 kg/cm2 : 5 - 7 m/s

Please elaborate the formula?

For water capacity m3/hr pipeline sizing at various velocities 1.5 m/s thru 3.0 m/s based on formula:

water flow m3/hr for pipe size 15mm:

velocity m/s: say 1.5. 15mm = 225 area =

3.142 x 225 x 1.5 x 3600

------------------------ = 0.95 m3/hr

4 x 1000000

velocity m/s: say 3.0 15mm = 225 area =

3.142 x 225 x 3 x 3600

------------------------ = 1.9 m3/hr

4 x 1000000

water flow pipe size 100mm:

velocity m/s: say 1.5. 100mm = 10000 area =

3.142 x 10000 x 1.5 x 3600

------------------------ = 42.4 m3/hr

4 x 1000000

velocity m/s: say 3.0 100mm = 10000 area =

3.142 x 10000 x 3 x 3600

------------------------ = 84.8 m3/hr

4 x 1000000

you can now workout for any pipe size depending what velocity you want to keep.

Keeping everything constant change velocity stated for air and gas and the same formula indicates the m3/hr compressed air flow and natural gas flow via pipe selected.

please let me know what will be max flow in m3/hr for thermic fluid for a pipe line size of 250 mm dia

You can circulate up to 5,000 cubic metres in one hour.

mm

Please intimate MKcal output of thermic oil fluid.

Is it from one boiler? or a set of boilers like: 5.0 Mkcal x 3 nos

a 250mm pipe is good enough for 15 MKcal at reasonable pressure drop within limits.