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This plant is 10 years old. It is just a concrete pit without any coating. joe, thanks for those links(NACE and SSPC) I will get technical details from vendor and do some literature survey ( Google). Appreciate your suggestions

I have contacted 3 vendors for CONCRETE waste water pits and sumps coating and fixing the cracks in the pits. How de we know which epoxy is best suited for this purpose. Everyone gave warranty for the structure integrity and says their epoxy coating is best under these conditions. Temp -...

Katmar, Can you plz provide me with the link for "Designing piping for gravity flow" by P.D. Hills.Google gave me two links but those are in chinese and another one in french( i suppose).

3" overflow line is 21' long. It goes 70" down from the overflow nozzle and another 15ft horizontal line that runs through the floor in to a waste pit opened to atmosphere. A total of 3 tees are in the line. No other valves or fittings.polymer crumbs wont pass thru the screen shaker. Normal...

thanks for the valuable posts. Exisitng tank has a 3" overflow line. It is 4" below from the open tank top. Water is still overflowing from the tank top inspite of the existing 3" overflow line. We encounter unsteady flow every 1 minute( line will be flushed with water to get rid of polymer in...

We have a cylindrical tank with 40" id and 60" height. I have to come up with a over flow line at 5" from top of the tank( this gives sufficient head to the pump that pumps at 5gpm) Water flows at 90gpm in to the tank. Using Q = A*V ( Q = 85gpm) I have two unkowns here. Even if i use 3" pipe...

Katmar, Thanks for the valuable post

Dcasto, thanks for your suggestion.Sorry for the confusion. The max inlet water temperature to the cooling water is 95deg F. Entering Wet bulb Temp is 80 deg F . Conditions are to cool 97 deg F water to 86 deg F . Can anybody tell me how do we calculate wind load? My vendor has given the value...

Katmar, There are no diffrent temperature rises here. Maximum in summer will be 95 deg F. If we run them as one unit, we have to shutdown both the units for maintenance which leave me without cooling water for the plant. Preventive maintenance of this tower during annual s/d will keep us away...

We got two cooling towers with same capacity in the plant. Initial plan was to operate them independently but these towers have come with equalizers and flume lines. Is it efficient to operate the towers independently or together as one unit? There is no float v/v and make up water connection...

We got two cooling towers with same capacity in the plant. Initial plan was to operate them independently but these towers have come with equalizers and flume lines. Is it efficient to operate the towers independently or together as one unit? There is no float v/v and make up water connection...

I am sorry for that. I am a process design engineer. The details are here. It is a batch process. we maintain a minimum of 20% level inventory. Acetone, used as a solvent in polymerization, is stored in a 13000 gal tank ( 10ftdia X 20ft height). It is pumped at a rate of 60gpm at 30psi to...

I have designed a plate and frame heat exchanger to cool liquid in a tank. The return line from the process to the feed tank running at 20gpm is cooled from 90 to 55 deg F. The cooled liquid is then pumped to the process at 100gpm. I feel it is economical to cool return line ( 20gpm) to the...