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All pipes are with insulation and cladding and AHU's are located in both the roof and basement. The thing is the the medium w/c is a domestic cold water that we are using for flushing is having a normal temperature and its only circulating on the HWT PIPING network bypassing the H.E. and AHU's...

"circulating from the pump to the branch line going to AHU's and the coming back to the pump." "Is the water going THROUGH the AHUs?" Oh sorry I have to correct that because actually the AHU's are isolated so the water is only circulating in the piping network. Is there a relation between the...

YES and the temperature of the water is more or less half the boiling point.

While we are flushing our HWT system with domestic water for two day in a row, I noticed that the temperature of the circulating water just increased. I do not understand how this happen because we bypass the heat-exchanger in the system so the water is only circulating from the pump to the...

How to determine the static pressure requirement of an EXHAUST FAN serving a Generator room that is directly installed above the ceiling without duct knowing its capacity? I know that for a non-ducted exhaust system, usually the SP ranges between .05" to .20" and exhaust system for generator...

To be honest I just want to get an idea from forum members regarding the proper piping connection of HE to verify the work that we had done on our site because I am being question why is that I did not install 3 way valve on the system and how could we control the temperature w/o the 3 way...

How about the valves included? Whats the idea of putting a 3-way valve in the piping connection for HE. Is there any benefit for this. How about double regulating valve. Btw the system is HOT WATER SYSTEM for AHU's.

Where can I get a reference for the piping connection of a PLATE HEAT EXCHAGER? Can somebody provide a good book for this subject.

Is it ideal not to isolate a PLATE HEAT EXCHANGER on a hot water system when flushing and chemical treatment will be applied to the network?

How much percentage tolerance I can use in choosing the temperature rating of a FLEXIBLE CONNECTOR to be used for HOT WATER PIPING. Is there any standard or code for this? Please specify. The HOT WATER TEMPERATURE IS 82 deg Celsius, while the product that I'm planning on buying is WEICCO...

Dear Gentlemen, So my issue is about the comment on the AS-BUILT DRAWINGS in which they wants me to reflect on the drawing the flow of water on the pipe including the branches and risers. Now the usual way of getting these values is by using the Hazen Williams Formula which will take time but I...

Can someone provide me with the formula for this and regarding the DP values is it possible just to deduct the readings on both suction and discharges gauges to get the DP? For example in suction side of the pump the reading is 3 BAR and in the discharge line the Pressure is 4.5 BAR so the DP...

The situation is I need to provide a 110 dia. pipe to the suction side of a pump, in which it will be tap/connected to a 200 dia. pipe. The problem is the 200 dia. pipe is the mainline and already installed to supply the network in building. So my question is what is the best way for me to...

Can someone provide or refer procedures and standards for the installation of insulation on Diesel Generator Set Mufflers. Thanks

Sir this may sound stup.d but what do you mean by "piping is below grade"? Just to clarify the 110 feet value is measured between the FFL of two floors or the top surface of both floors? Is it possible to just deduct the slab thickness from Invert level in which the resulting value will be the...

Thank you sir I really appreciate this. Btw can you check the drawing that I made through word file if my interpretation of your explanation is correct? Thanks http://files.engineering.com/getfile.aspx?folder=72123b77-cfc9-45e9-9209-8f7a530acb7d&file=Floor__Slab.doc

In my drawings instead of slope the invert level for each point are shown. How can I use this invert level for the installation of piping in the ceiling? I know that you can use the IL for computing the slope of the pipe but can it be use for measuring the exact distance between the ceiling slab...

What should I print on the labeling sticker for a Staircase pressurized fan duct? Is "pressurized air duct" applicable? If not please provide the proper or standard way of naming it. Thanks

Can somebody elaborate the meaning and importance of identifying weather the FCU is right hand or left hand type. From my understanding these are locations of coil connections for the supply and return water and will depends on the flow of the air if its going from left to right or right to...

Regarding about the positive/ negative pressure you are probably correct, but since I'm not the design engineer here let them worry about that heheheh. Maybe thats the requirements, I will check again the values to verify it. Now to my other question, I'm trying to compute for the air flow...