At our refinery we have recently had trouble with Propane that is contaminated with water. This is the first time we have encountered this. We do not currently run any lab tests to determine the concentration of H2O in propane so we are inexperienced with the particulars. I know that...
I can confirm UncleSyd's concern from my own observations of the same thing done on a 150# steam 12" Weld Cap at my refinery.
The Hot Tap guys were concerned about a proper weld profile with a 8" on 12" tap.
Like Syd said, talk it over with the experts who specialize in hot taps, plugging, etc.
There probably is not a handy formula or at least not one that I can think of off the top of my head. I would dust off the Calculus book and set up an integral for surface area and derive the formula. I looked at it and it is not as difficult as it seems.
This is a very open ended question.
What kind of pump do you have? Have you examined the hydraulics of the system to determine if there are any oppurtunities to debottleneck the suction or discharge piping? Develop a system curve for the existing system and this will be more clear. With this...
Try Nalco Chemicals. I use a flocculant in my Wastewater Plant called Nalco 8108 and it works quite well. They have numerous coagulants/flocullants that you can jar test and select according to your specific conditions and needs.
This is a strange question. The refinery you are working at should have a receipt of the crude they are charging to your units and have a breakdown by percent of each kind (i.e. Kuwaiti Light, Qua Iboe, Urals, Etc.). Also, the crude should have an assay for the content of sulfur by wt%, API...
I work in a refinery in Louisiana and cell phones are allowed in the refinery. Not everyone is given a radio so cell phones are a necessity. Contractors and directs use them.
Also, how could you here anything on a cell phone while in a unit? You should have ear plugs in over 85 decibels...
tbedford,
The only tank level I can be sure about is tank 2. At the refinery we use software called Exaquantum to trend process variables such as tank level for this case. For some reason there is no level gauge outfitted on tank1, the one that overflowed.
So yes, I am quite concerned that...
BigInch,
Thanks for all of your help and interest. I am going to experiment with the Churchill equation and do my best to get to the bottom of this problem at work this week.
Once again, thanks for all the help and suggestions!
Kyle (MOUSA)
BigInch,
Yes the 16" connector does run from tank bottom to tank bottom.
By the way, what is the form of the Churchill equation?
Does it work equally well for all flow regimes or is it limited to fully developed turbulent flow? What are its advantages and disadvantages?
I am going to see...
BigInch,
Yes, both tanks have the same base elevation. However, that is what I see on paper. In the field, I know my eyes could be deceiving me, it looks as if tank1 is slightly below grade. Maybe 1 to 2 ft. lower than tank2.
Also I believe you are right about the rate of water being...
BigInch,
I started working on this very approach today. The diameter of tank 1 and tank 2 are both 120ft. Both have a height of 40ft. The best timeline that I have is that after 2 hours 20 minutes, a high level alarm on tank 2 went off, which is set at 75%. This is what told the operators...
Thanks JStephen,
I want to add that the 7500 GPM flow rate is based on the stormwater pumps' curves. I was told by operators that the discharge pressure for the pumps operating in parallel was around 60 psig and this corresponds to 7500gpm. However, I was given some more info just yesterday...
