That's exactly what we want to do : we plan on installing an orifice upstream. However, instead of going trial and error by testing different orifice sizes for all pressure conditions and for different operators, we are looking for a quantitative criteria.
We use railcars for storage and transport that are cleaned with water hoses. In the process of improving cleaning operations, we are now using a 1.5” diameter hose, instead of 2" before, coming out 2" diameter piping. However, operators now complain that the reaction force is too intense...
I'm currently using an the 1977 version of API technical databook for petroleum refining to estimate physical properties of hydrocarbons blends.
However, it seems that a data is missing in procedure 6B1.8 for density calculation : the value of constant c3 reads as 0.0. I think that the...
I'm reviewing flow compensation factors for gas mixtures and I came accross a few inconsistencies on the composition compensation. The formula used is :
((P/Pref)(Tref/T)(G/Gref))^0.5
with G and Gref defined as the specific gravity OR molecular weight.
The composition of the gas varies...
I'm looking for an effective software to handle the calculations of hydraulics for the design of a new cooling water network.
Maybe there are already threads on that subject but the search engine is unavailable at this time...
Thank you,
Frederique
[noevil]
Does anyone know a source (preferably online) for the mechanical properties such as the modulus of elasticity and the poisson's ratio at variosu temperatures for stainless steel? I'm trying to compute the pressure correction term for a pipe given by eq. 9.110 in RJ Miller's Flow measurement...
I just needed a rough figure confirming / infirming a pressure problem with operators using some hoses in parallel. Thanks to all your suggestions I obtained a number confirming our hypothesis, the new operating procedure is already in the works!
Is there a way to have an estimate of the pressure drop through a 25' hose. I did a first calculation assuming first all the length of the hose was straight (which must be almost never true...) and second assuming that the hose has the same caracteristics of the pipe it is connected to since I...
Being myself a female engineer, i had my fair share of job interviews in the last 6 months.
I always wore a black or grey suit with pants most of the time (especially if you're interviewed for a position in a plant!) with colorful tops or shirts, not too conservative, just a bit fun to show some...
I just learned a safety valve is used mainly for gas and steam and is caracterised by a "pop" action. A relief valve is caracterised by a gradual lift proportional to thje increase in overpressure, mainly for liquid applications. However the vocabulary may have slightly different meanings...
To verify if we have a two-phase flow in a steam condensate line, is it correct to assume the pressure drop accross the tubing is equal to the pressure drop of the estimated flowrate of steam plus the pressure drop of the remaining flowrate of water? Can it give a rough estimate? If not is there...
Thanks for the tip! I will try that as soon as I can. It could be useful to compare the results to a "purely" thermodynamic and interesting approach ("Spreadsheet calculates critical flow" by Sunil Kumar, Chemical engineering magazine, Octobre 2002).
presso
[noevil]
Thanks vpl, maybe my last message was misleading but i had already read all paragraphs of page 1-9, i've been trying to track down Shapiro's book (reference 19, the bible for compressible fluids from what i gathered) for a couple of weeks with no luck... and no formula yet!
[noevil]
