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  1. advsign

    Cleaning Shell Side of Exchanger

    Hello Guys, Quick question to a problem we are having. Shell and Tube exchanger over time has developed low heat transfer issue. Cooling water is on the shell side. Delta T has decreased from 12C to 2C over the past few months. Now suspecting the cooling water side of the tubes have lost...
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    Cooling water temperature for a Distillation unit

    We were wanting to do a temperature test on our cooling towers. We wanted to increase the variable speed fans to 100% and see how far the temperature could decrease. Problem: Here we have several distillation columns and all use water cooled condensers. The distillation department would not...
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    Ultrasonic Pipe Cleaning

    Looks like ultrasonic cleaning requires the use of water and a solution. For our process we cannot introduce water or other solution. May just have to continue to remove pipe spools and clean them by hand. Ken
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    Ultrasonic Pipe Cleaning

    Part of our process deals with Aluminum Chloride. We heat trace the piping to help prevent it from plugging. We still have issues with it build up on the inside of the carbon steel pipe over time and plugging the pipe. When it plugs we have to pull and clean the pipe. One manager here wants to...
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    Weep Hole Purpose in Lined Pipe

    Can someone tell me the purpose of weep holes in teflon lined acid pipe? thanks in advance Ken
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    2 PSV's - 2 Vessels but 1 flame arrestor

    The flame arrestor is desired because the vent gas will be Hydrogen. Ken
  7. advsign

    2 PSV's - 2 Vessels but 1 flame arrestor

    I have 2 vessels that I want to tie together to go into a flame arrestor. During operation one vessel is at high pressure and the other one is at a low pressure. Say if the current PSV outlet is 4", can I run 4" pipe to tie them both into a 4" flame arrestor or do I need to upsize the line. If...
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    Looking for a dye for heat transfer fluid

    I asked Dow (Dow China) but they tell me that there is no such thing. I do remember in the states we used something but I was not involved in that project. Ken
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    Looking for a dye for heat transfer fluid

    I am looking for the name of the powder colorant that you add to heat transfer liquid. I know there is some powder that you can add to Dow Syltherm XLT to change the color from clear to blue or pink. I just do know know the name or where I can find it. Now if we have a leak, the liquid is clear...
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    Sulfuric Acid Concentration Chart

    Thanks for the response. I am not a chemical guy at all. What we are doing is trying to dry anhydrous HCl with the sulfuric acid until our moisture is less than 5ppm. Our lab is titrating the sample and getting funny results. Their excuse is the Sulfuric has residual HCl in it and they cannot...
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    Sulfuric Acid Concentration Chart

    Hello All, I am trying to locate a chart for looking up sulfuric acid concentration. We have 96% to 98% Sulfuric. I want to take a sample, measure the specific gravity and temperature. Then take this data and with the chart I can find out what strength my Sulfuric is. All help will be...
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    anhydrous hydrogen chloride gas converted to a liquid?

    I have a question. I am looking at a process that takes 100% Anhydrous HCl gas and compresses it. Then it is run through some refregeration -72C and transformend into a liquid. It is then stored in a tank for later vaporization. Anyone know if this can be done? Thanks, K
  13. advsign

    Bird Screen on PSV outlet Required?

    Does someone have an internet link or name of these bags? I would like to at least require them to install these bags. Thanks
  14. advsign

    Bird Screen on PSV outlet Required?

    Is it required to install a bird screen (wire mesh to prevent bird next inside of PSV outlet pipe) on the outlet of the PSV discharge by any type of code? Thanks, Ken

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