Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: RJB32482
  • Content: Threads
  • Order by date
  1. RJB32482

    Outlet Piping Pressure Drop - Steam

    Hello, We have a PSV that has a set pressure of 50 PSIG, 10% allowable accumulation, and 4,456 lbs./hr. relief capacity. I'm looking to size the tailpiece piping to ensure we don't go over the 10% rule (5 PSI in this case) for the relief valve. If I use normal pressure drop calculations, what...
  2. RJB32482

    Steam Tracing Sleeved HDPE Piping

    Folks, Our plant is looking for an option to put a 4" HDPE pipe in a 6" carbon steel line. The 6" carbon steel line is currently in service. They want to reutilize the 100 PSIG steam tracing on the outside of the pipe. My main concern is the HDPE piping only has a rating of 140F and the 100...
  3. RJB32482

    Wet Steam Accumulator Level Control

    We are looking to install. A wet steam accumulator on our boiler system. We are struggling on level control. I read that the steam entering the vessel refills the vessel water that is flashed off. But someone we visited had a water pipe going into the accumulator from the deaerator. Do we need...
  4. RJB32482

    Boiler Horsepower Calculation

    Hello, I'm looking to have someone double check my calculation for the capacity of a 250 BHP boiler assuming: Feedwater Temperature = 270 degrees F (Specific Enthalpy of the Liquid = 239.17 BTU/lb) Steam Pressure Desired = 250 PSIG (Specific Enthalpy of Liquid = 381.76 BTU/lb, Latent Heat of...
  5. RJB32482

    Pressure Regulators in Compressible Flow Calculations

    Hello, Is there any way to convert a Cv or Cg for a pressure regulator for compressible flow to a resistance coefficient in pressure drop/flow calculations? Or do you just have to do the following: - determine the pressure in the pipieline up to the regulator - determine the pressure drop of...
  6. RJB32482

    Feedwater Temperature Rise in a Deareator For Boiler Feedwater

    Hello, Is there a rule of thumb on how much temperature rise you would expect in a deaerator for boiler feedwater to and from the deaerator? I'm assuming some of the heat from deaeration gets transferred to the incoming feedwater. Thanks in advance.
  7. RJB32482

    Non Newtonian Pressure Drop Calculation

    Hello, I am researching how to calculate pressure drop of a non newtonian (power law) fluid when it is in the turbulent flow regime. I read the "Facts at Your Fingertips" for Fluid Flow in Chemical Engineering magazine (December 2008) to calculate the friction factor for power law fluids. I...
  8. RJB32482

    Vapor Composition in a Closed Tank

    Hello, I'm trying to figure out the vapor composition in our expansion tank. The solution is a 30% propylene glycol solution (by weight) and it is at a temperature of 110 degrees Celsius. The total pressure in the tank is 26 PSIG. There is a 5 PSIG nitrogen blanket on the tank too. My...
  9. RJB32482

    Heat of Dilution - Hydrocholric Acid

    Hello, Anyone have a good procedure or calculation method for calculating the heat generated from adding water to 37% by weight Hydrochloric Acid. I've seen the enthalpy-concentration diagram in Perry's but don't have much experience with this. For example the heat rise of adding 100 gallons...
  10. RJB32482

    Sizing for Smaller Pump Impeller

    We have a centrifugal pump that is pumping too fast for our process. The medium is water and currently it is pumping at 635 GPM. We need it to pump 425 GPM of water to our reactor. Our maintenance staff wants to trim the impeller instead of just throttling back a valve in the discharge line...
  11. RJB32482

    Determine Glycol Outlet Temperature

    I am trying to find out what the outlet temperature of a 30% propylene glycol solution after it exchanges heat with air through a finned coil. Here goes the knowns I have: Glycol Solution Mass/Volumetric Flow Rate (using minimal hydraulic flow of the pump) Glycol entering temperature (set...
  12. RJB32482

    Flow increase in 6" Line

    We currently have a 6" water line that goes underground and splits into 2 different 6" water lines that never tie together again. We are looking at blanking one of these 6" water lines due to not using the water at the source anymore. Am I incorrect stating that the flow in the other 6"...
  13. RJB32482

    Manufacturer of "Vented Pipe Cap"

    We currently have a 6" open ended pipe that we take % oxygen readings off of when purging a vessel with nitrogen. An issue has beeen brought up with asphyxiation hazards due to testing the atmosphere while the vessel is still N2 inerted. We were thinking about a pipe cap with a 1/2 capped vent...
  14. RJB32482

    Plastic Tank in a Classified Area

    Hello, We have a silicone storage tank in a Class 1 Div 2 area. Even though silicone is not flammable, there might be a slight concern that flammablew vapors could get into the tank and a spark from transferring silicone could cause an issue. Here goes some other things pertaining to this: -...
  15. RJB32482

    Steam Pipe Orifice Location

    Hello Everyone, I am looking to locate a steam orifice in a pipe for heating a rainwater sump. I believe that there is too much steam going to this sump and the water does not need to be heated as much as it is now. We can throttle a gate valve back to get less steam through the piping, but I...
  16. RJB32482

    Foaming During Transfer of Reactor

    We have issues with foaming during a transfer of a slurry from our reactors to a holding kettle. We pump the reactor to the holding kettle. The reactor has 3 sets of 45 degree pitched turbine blades and the hold tanks have 2 of these. We use an antifoam product on the slurry during transfer...
  17. RJB32482

    Surface Area Difference of Smaller Beads

    Drawing a blank here, but could someone help me figure out the surface area difference between smaller and larger spherical beads if I know the bead diameter and bulk density of both the larger and smaller beads? Thanks.
  18. RJB32482

    PSV Inspection on Pentane Tank

    Hello, We have installed a full port gate valve before a PSV on one of our pentane storage tanks (about 7'x7') for maintenance purposes. There is only one PSV on this vessel. We have administrative controls to have this tank empty and shutdown before the relief valve is taken off by closing...
  19. RJB32482

    Adding Pull Down Menus in Excel

    Hello, I am having a hard time trying to get pull down menus made in Excel. I'm looking to have a whole column have cells that will give a pull down menu with 4 choices. Could somebody help me on how to get this done? Thanks.
  20. RJB32482

    Determining Settling Velocity for a Tank

    Hello All, We are looking at turning our wastewater storage tank into a "settling tank" to capture solids instead of having them be pumped from the tank into "prefilters" before heading into a carbon bed treatment system. We are going to install a dip tube (water just free falls now from top of...

Part and Inventory Search

Back
Top