ISA S75.01-1985 quotes for an inlet reducer (Eq 6, pg 15):
K1 = 0.5 * (1 - (d^2/D^2))^2
Crane 410M page 2-11, eqn 2-10 quotes
K1 = 0.5 * (1 - (d^2)/(D^2))
These would appear to be equivalent concepts but there is a difference - ISA quotes an additional squared at the end of the eqn.
So, am I...
Hi,
I'm attempting to assess (at a preliminary stage) whether a vacuum pump system (liquid ring pump and ejector operating in two stages) is adequate for an increase in duty in the seawater flow. I have a pump curve for the liquid ring pump but no other information. It gives a curve of torr...
This is a tricky question to define as its not a specific item or system, but a generic concept. While reading the Loss Prevention Bulletin article this month on pigs, I read a comment about "20 tons of force" driving a pig out of a pipeline which had its pig reciever open causing the pig to be...
If I have a vessel with a mixture of hydrocarbon (2 phase) and water (liquid), then raise pressure and temperature till they are higher than the critical points of the hydrocarbons alone, what happens? Does the water affect the critical point (assuming that effectively all the water is in its...
I have another obscure enquiry:
I have a natural gas compressor with a PCHE discharge cooler, which in some situations may for a while be called on to pressurise 45 barg gas to 160 barg. I have found that discharge temperatures for this operation are close to the cooling medium boiling point in...
Does anyone know of any standards that define acceptable designs and possible issues with positive isolation such as DBB, spectacle blinds, etc? The only one that I know of Is NORSOK P-001 section 6.
Question: Does a multi-hole orifice have any difference to a single hole orifice in terms of behaviour (other than the reduced noise levels?). I am thinking in terms of increased downstream turbulence as the two or more flows recombine, changes in the balance of flow, etc causing increased...
Currently planning on using a DP cell for a level transmitter. The level is in a static line on the outlet from a vessel. My question is this, for specifying that item I have been asked to supply a range of barg pressures for a "calibrated range". My expectation was that the range would be a...
Does anyone know of a reference that gives equivalent lengths for pressure drop calculation for L and T type ball valves? (Those that I possess only deal with the normal breeds of valve.)
Alternatively, a logical conservative adjustment to the standard ball valve allowance for these internal...
