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  • Users: AliNaseem2
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  1. AliNaseem2

    Unidentified Damaged cable

    During excavation an underground cable was damaged, the cable had no markers, no one has claimed ownership of the cable as of yet. I believe the cable is very old and already decommissioned, the client want us to perform a test weather the cable is connected somewhere or not and trace its...
  2. AliNaseem2

    How to calculate Weight of steel structure

    Hi, I am working on a project where we have to erect a steel structure for capacitor banks, I need to calculate weight of each part of steel structure for erection, Weight of each piece needs to be put on lifting certificate and calculate safe working load. I tried looking online but can't get...
  3. AliNaseem2

    Volume Damper Near Exhaust Fan Entry

    We have Installed 6 Centrifugal Exhaust fans for Multi Purposes ( Toilets Ventilation , Kitchen Hood Exhaust , Public area Exhaust ) . we have installed dampers on each branch in the ducting system , but now the Consultant is asking us to install the Volume damper on the roof near the exhaust...
  4. AliNaseem2

    2- Pump Control Panel ( Confusions )

    HI, Dear All , I have bough Vertical Multistage pumps 3/phase ( 1 stand by & 1 Operation ) with a Control Panel ( Smart EVO 2 ) , i have done the following steps to run the pump no.2 ( since Pump no.1 in on Standby ) with an on/off Float Switch in emptying/Auto mode : First Step - (...
  5. AliNaseem2

    Closed Loop Chilled water Makeup Water / Expansion Tank / Air Separator

    Hello Everyone , I have a Closed loop chilled water system , its a Primary (constant Speed) and (Secondary variable Speed) System , all the Pumps and the Chilled are located at the Roof Top and the Loads(ahus,fcu) at Ground level . The Closed loop System Should be Pressurized at a Specific...
  6. AliNaseem2

    Pressure Regulating Valve and Pressure Reducing Valve

    Dear All , I Am little confused between these two valves , Pressure Regulating Valve and Pressure Reducing Valve . as per study i think both are same but why different names , Please review the Attached Drawing , the Pressure Reducing Valve is been only installed to the hot water supply...
  7. AliNaseem2

    What is the function of pressurization unit in chilled water system?

    What is the function of pressurization unit in chilled water system? i have a Primary , secondary pumping chiller system , Why we need a Pressurization unit with makeup water in a closed loop chilled water system , what should be the location of PU in a Complete Closed loop
  8. AliNaseem2

    Steam And sauna room ventilation design considerations

    HI, I am working on a hotel project , in which we have steam and a sauna room , when designing i didn't provide any extraction duct for the rooms but the operator requested to have a extraction in the steam room , but i don't get the point why do we need extraction in the steam and sauna...
  9. AliNaseem2

    Chilled water piping support

    HI, I have chilled water piping , Water supply piping on roof top , and to be economical i am using a steel I beam and L shape -MS steel angle which will be used for the piping support and supported by to stands on each end . Either i can go back to basics and start calculating the I beam...
  10. AliNaseem2

    Electric water Heater indoor or outdoor

    HI , Dear All , I have always seen that the Electric water heater is installed indoor . What if we place the Circulation pumps and Electric water heater out door into the direct sun . what will be the effects of this , or is it highly recommend that the Electric water heater should be placed...
  11. AliNaseem2

    Rain pipe connected to Waste pipe

    Hi , Quick Question . i have different piping for waste , soil and rain , what if i connect the rain pipe to the waste pipe , is it OK by plumbing code , or there is a solid reason that both pipes cannot be connected , Feed me with your knowledge , Thanks , note : i have a rain pipe...
  12. AliNaseem2

    Chiller piping and Loops

    Hi , i need to clarify some thing , i have a main chilled water supply and chilled water return pipe on roof top , this main pipe's are feeding 24 typical shafts . i have 4 floors , when the risers reaches after distribution to last floor at the end ( since i have a Closed loop they are...

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