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  • Users: sta07750
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  1. sta07750

    What drives SCC in Caustic solutions at 150F? High pH or Chlorides?

    We are looking to replace a 50% Caustic line. Our pipe spec references NACE and says to use PWHT Carbon Steel up to about 170F. We shouldn't get higher than 150F but it gets hot in Texas and the caustic is not always flowing in the pipe. I've read conflicting reports that 150F may be too high...
  2. sta07750

    Pressure Measurement and how it relates to TDH needed.

    I've got a header that is charged by two parallel pumps. I'm trying to tie a third pump in downstream. I'm trying to come up with a number for TDH for the third pump. My only available pressure measurement on the header is about 12 vertical feet below my available tie-point. When calculating the...
  3. sta07750

    Pumping into Pressurized Line

    I'm spec'ing out a new pump for our waste water lift station. The lift station will pump out via trash pumps through some discharge piping and into a common sewage header that runs to the treatment plant. The issue I'm having is that the common header is filled mostly by a another, larger lift...
  4. sta07750

    Carbon Disulfide Contaminated Sludge Disposal

    My employer has recently emptied a 500,000 gallon tank that was full of water contaminated with Carbon Disulfide (CS2) and other organics. It was pumped down and run through carbon beds to remove the contaminants. Now at the bottom of that tank we have about 6 inches of sludge (roughly 6000...
  5. sta07750

    Blower System Design Literature/Resources

    I'm a Chemical Eng by trade (and a fairly new one at that) but I've been asked to do some work on a blower system. It currently operates at 2500SCFM, SP is about 30" wCg. They want to double the capacity of the system but I don't know what will work from a design standpoint (run parallel...

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