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  1. dnigos

    How to properly mix steam and water in pipe without waterhammer

    Thanks katmar and MJC...those links were helpful. But after much consideration, the KOMAX steam heater seems like it fits my needs. http://www.komax.com/det-ogsteam.html I will run this through my boss and see what he thinks. D
  2. dnigos

    How to properly mix steam and water in pipe without waterhammer

    The short description: We currently use steam directly to heat our diverted water going to our waste water treatment. This should have been obvious to the previous designer, but we now have "banging" due to waterhammer (I'm the new guy). We would still like to use the steam safely. The...
  3. dnigos

    72" Pipe Repair at 45deg Miter bend

    I appreciate all the input guys!! BigInch: I'm leaning on that route more and more...since my options are very limited. We should be able to remove the existing wrap and rewrap without having too much of a problem. There's no advantage in a box. It was just an option. chief/chicopee: At...
  4. dnigos

    72" Pipe Repair at 45deg Miter bend

    All, Data: 72" CS line, Low Pressure (~20psig) in water service. I'm stuck here. I have a leak at a 45° miter bend weld. Entire weld was previously composite wrapped don't know when, but I believe the wrap just failed. How would you fix it? Here's my options and thoughts: 1. Utilize...
  5. dnigos

    Maximum Allowable Internal Pressure During Welding

    Reducing the operating pressure is an option, BUT this route is what we don't want to take ($$$$). We are in the process of doing a UT to determine the line current thickness, but we should have sufficient wall thickness. We have about 5 ft/s flow in the line. The service is crude going to...
  6. dnigos

    Maximum Allowable Internal Pressure During Welding

    Hi - I'm currently preparing a line for a hot tap and I have been religiously following the API 2201 in the process. Based on that document, I have a clear understand on metal minimum thickness and how to proceed & what precautions to take when welding onto a thin pipe. However, API seems to...
  7. dnigos

    Stress on knuckle region of an ellipsoidal head: Section VIII Div 1

    I have a drum with a localized corrosion issue on the knuckle region of the head. Tmin calculation on the knuckle region (under hoop compression) is required for FFS evaluation. To me (coming from a recent graduate without prior experience), this calculation can not be done with a single...

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