All,
I have a problem I hope you can help me with...a forcemain sewer pipe that pumps effluent through a 25.4" ID pipe at 1,000 to 2,000 gpm, 30,000 ft away, elevation change from the pumping station to the open tank discharge point of +240 ft. There are a dozen air relief/vacuum breakers...
Had a bit of an oops moment earlier when contractor were performing a hot tap on a glycol line in that the pilot bit broke
off and the coupon dropped into the pipe. The next thing the pipe
does is run 50 ft up. Are there any rules of thumb for velocity
required to carry an object through that...
Howdy...I have a facility which has ammonia relief valve discharge piping that is well under 15 ft from the ground. The protected equipment includes, among other things, the primary suction header for the facility and it can't be easily taken out of service (has never been in 30 years).
I'm...
Hello all,
I'm about to bid work involving installing new underground natural gas pipe with a requisite pressure test...I'm trying to find a reference for how to support pipe during the pressure test that is uncovered. I know there are guidelines for how many feet of what diameter can be...
Can someone point me in the direction of how to learn more about the science and engineering of distillation?
I am a process engineer with responsibility for, among things, an alcohol distillation unit with a molecular sieve dehydrator. I'd like to learn more about the engineering that governs...
Can someone point me in the direction of the properties of saturated ethyl alcohol at different temps and pressures?
Density & enthalpy would be great...superheated properties would be really really appreciated.
Something like what NIST offers for certain fluids...
A few weeks ago I had a voicemail from a cold-calling salesman regarding some equipment that if mounted in a compressed air header could be used to determine the
magnitude of and when system leaks occur. I dismissed it without retaining any contact info as I thought it to be very likely a waste...
I have a process in which liquified CO2 with less than 1ppm of entrained O2 stored at 240 psig on one side of a ball valve with air at a few psig on the other appears to not only leak CO2 through the valve (small amounts) but the CO2 appears to absorb O2 through it as well (very small amounts...
If someone is aware of any techniques used to analyze and measure pipeline shock / surge and guidelines for them, would you please pass them along to me?
The pipeline in question is a 5 mile long force main sewer line (peak pressure 120 psig). The discharge is open ended. The concern is that...
I need to calculate the flow through a 3" valve and a length of 3" hose...I've done hundreds of these for flow through rigid piping, never anything through a hose.
Does anyone have any empirical data for flow through hoses? It will be strewn such that the bend radii are as large are possible...
I'm trying to get a handle on what's available with flow instrumentation with data acquisition on the residential/commercial level. Specifically for gas, water and electricity. I'm plenty familiar with industrial spec instruments that tie into PLC's but I'm volunteering to assist with an...
I remember reading once about an interpretation in section VIII that defined when section VIII applies and when B31.3 applies and it said that essentially if used as a pipe it is B31.3, if used as a vessel it is section VIII. I have a new "vessel" that will be used in service up to 30psig, will...
We have a lot of carbon steel pipe running through pipe bridges containing liquid NH3. We are constantly painting/repainting/repainting to maintain mechanical integrity and some of the areas require expensive scaffolding to get to.
Anyone have any experience with a coating other than...
I need to calculate to a reasonable degree of accuracy how long it will take to cool a cube (about 3 ft in each dimension) of hot honey in a tote in a cold room.
I have the particulars for the honey, specific heat, thermal conductivity.
At the start the temperature of the honey is uniform...
I'm looking into switching our effluent alkalinity adjustment from caustic (50% solution) to a magnesium hydroxide slurry. Everything I've read and the vendors I've talked to espouse the benefits...are there any downsides on the treatment side? I've got a good understanding of what I'll have...
The "powers that be" monitor our boiler efficiency and our current method uses the natural gas and steam flow meters. Due to very dramatic swings in steam load, we often have a boiler firing in it's low range (20% or below). The steam flow meters simply don't work at that range and I get calls...
All,
I'd appreciate your help with this...
We have a large cellar that we maintain at 34.5F. It spans
five floors, has dozens of rows/alleys and inevitable pockets of stagnant air. Water is used to clean floors/etc in the cellar. There are areas near the floors that are pocketed and...
I've seen several equations for sub-critical, compressible flow through a valve given Cv or Kv, inlet and outlet pressure...Can someone shed some light on which to use and when?
the specific application is sat steam flow
I'm taking a guess that some viewers of this forum may
work in chemical manufacturing facilities that have had the need to do line stops in the past.
I'm hoping to get recommendations on companies that perform this service...my need is for a line stop in a liquid anhydrous ammonia line. We've...
Forgive me if this is the wrong forum for this question...
If I have a saturated mixture of ethanol and water (in a fractional distillation process) could I calculate the proof of the mixture from the temperature and pressure?
The trick is the "curve fit" between the two saturation lines...
