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  1. Potcarb

    Natural Gas Piping - VP < 0.5 inWC

    Hi, I'm sizing a natural gas line that feeds a combustion blower. There is an Eclipse Engineering Guide that I found online that shows some tables for pressure drop in the line at varying flows. It also states: Air, gas and mixture piping systems should be sized to deliver flow at a uniform...
  2. Potcarb

    Engineering Drawings

    Hello, Is there a good reference for standard engineering drawings/schematics, or really like a template on how and what order they should be done? For instance, what is all the information that should be included in a P&ID? How do we define pipe specs, and what does that look like? I was told...
  3. Potcarb

    Pipe Routing and Support - Learning Materials?

    I'm trying to find some good material to learn more about pipe routing and supporting structures within a pipeline. For instance, if I have a large pump with a heavy filter after it, what's a "best practice" way to route the piping? How do I design a good support that gives maintenance access to...
  4. Potcarb

    Considering Pipe Heat Capacity in Heat Transfer Calcs

    Thanks to everyone for your responses. My situation is related to the initial transient point. We have a liquid we need to unload through a hose and pipe to one of our tanks. I'm trying to figure out if there's a chance it could freeze somewhere in the line. I've done the calculations with a...
  5. Potcarb

    Considering Pipe Heat Capacity in Heat Transfer Calcs

    I was doing a heat calculation for fluid going through a steel pipe using internal convection of the fluid, conductivity through the pipe, and external convection to surrounding air... then I started to wonder: why do we usually neglect the heat capacity of the pipe itself? I've never seen this...
  6. Potcarb

    Air Temperature Inside an Enclosure

    Is there a good way to estimate the air temperature inside an enclosure? I have a section of pipe I'd like to cover in a "box". I have a fluid flowing through the pipe at about 175 F, and I'd like to see if I can at least keep the temperature at 170 F without any additional heating, just some...
  7. Potcarb

    O-ring Chemical Incompatibility - What does it mean?

    I recently found out that one of my process chemicals may be incompatible with an o-ring based on general chemical compatibility charts. What exactly does this mean? Could it cause a reaction, or does it just mean the o-ring could swell/rupture, etc.?
  8. Potcarb

    Steam Trace Sizing - Best Tube OD to Use?

    I'm trying to figure out if I can get away with using 3/8" copper tube to trace some carbon steel pipes. The pipes are 1". The temperature range I'm hoping to maintain is between 180 - 190 F. Our steam supply comes from a 10 psig boiler. The line length isn't terribly long, maybe about 20 ft...
  9. Potcarb

    Understanding Tuning Parameters

    I'm trying to understand how to tune a controller. The one I have is PI. I've searched some videos online where it talks about getting the Process Gain, as opposed to the Controller Gain. Is there a way for me to determine the Process Gain without messing with the Controller Gain? Or is there...

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