Hi,
I’m working on a brownfields project using an existing agitated tank to pump hot slurry into a flash vessel operating at 0.5 Bar abs. It is important to avoid air ingress as it impacts the efficiency of the flash vessel.
I have checked the minimum submergence level to avoid vortex...
Hi,
The HI standard 9.8 "Intake Design for Rotodynamic Pumps" states that the Minimum Submergence for a horizontal bottom outlet from a tank can be given by S=D (1+2.3Fr) where D is the nozzle diameter and Fr is the Froude number
The Froude No. Fr = V / SQRT(g*D)
where
V = nozzle velocity
g =...
Hi,
In appendix A of the ANSI/HI 12.1-12.6 (2005) standard titled "Rotodynamic (Centrifugal) Slurry Pumps", there is a copy of Equipment Data Sheets for slurry Pumps in metric and US units. our technical library only has hard copies or PDF copies of the standards.
I am looking for a native...
I am looking for a copy of Hydraulic design for flow of complex fluids: course notes written by Richard W Hanks Associates and published in 1981
I have carried out a search on the web but I have had no luck with Amazon and some of the other text book sites – they generally advise that the book...
In the tenth edition of API 620, 2002, the following is written in Section 5.10.5.2 under "External Pressure Limitations". It states that "cylindrical sidewalls of vertical tanks designed in accordance with these rules for storing liquids..............may be safely subjected to a partial...
Hi,
I'm am looking for typical pressure drops across DN 750 (30") and DN 600(24") conical strainers on a cooling water application. Flow rate is approx 2400m3/h (~10,000gpm). The strainers are fabricated from 3mm (1/8") perforated plate and the open area is 150% of line cross sectional area...
I have recently received a “short cut” vacuum rating calculation for tanks and vessels that states that the maximum vacuum that would exist in a gravity drain tank before air would enter is given by
Vacuum (inches Hg) = 2.036*H*rho*(g/gc)/Po
Where
H = total tank vertical height in ft
rho =...
We have an existing conventional pressure safety valve which relieves vapour to atmosphere (0 kPa gauge). The PSV is being checked for use for a new operating scenario. The PSV has a tailpipe (discharge piping) consisting of elbows and straight pipe run.
In determining the pressure drop ( ie...
Hi,
I am looking for some recommendations and/or a piping standard for anhydrous hydrochloric acid? Typical concentrations are 32%w/w and dilute at 3 to 5%w/w. One piece of information recommends glass lined or rubber lined steel pipe. I am also interested in whether anyone has experience with...
Hi,
Can anyone help with a viscosity prediction for a slurry if the solids concentration is known and the viscosity of the carrying liquid is known.
I have seen the equation by Einstein
Visc slurry = Visc Liq*(1 + 2.5*(1-e))
where e is ratio of Volume liquid/Volume of mixture. However this...
Hello,
I already have spreadsheets for calculating the partial volumes of horizontal tanks with various heads(flat, ellipsoidal, torispherical, etc) but I am interested if anyone has information for calculating the partial volumed of inclined horizontal tanks. I believe there may have been a...
Hello,
The original Swamee & Jain explicit equation for friction factor calculation for turbulent flow in pipes has f = 0.25/[(log.....)]^2.
I have also seen on the web f = 1.325/[(log.....)]^2. The difference is NOT the factor of four beween the Fanning friction factor and the Darcy friction...
I am looking for some data on recommended pipe line velocities for thermal oil operating at 300 Deg C (572 Deg F) and at 120 Deg C (248 Deg F). The oil SG varies from approximately 0.9 to 0.8 and viscosity from approximately 0.8 to 0.5 centipoise.
Using "typical" line velocities for...
