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Agreed, the auditor needs to take a chill pill

For services such as this, industry practice is use diaphragm sealed impulse lines leading to LT.

Having read the first 2 pages of this article leads me to believe there are unacceptable levels of traces of homogenous phase Ziegler - Natta catalyst and co catalyst in the product you've got from this 1-butene unit. So these addition - polymerisation reactions are most likely responsible for...

Often, in actual operation, pumps dont operate at design conditions. Flow may be less than design, or developed head may be much lower. In such cases, a variable speed pump will help to reduce power demand. It may be nice to have a pump with a design flow at higher than 80% of BEP, but to me, is...

CW header size will depend on which set of these coolers results in max flow in this header - are all coolers running at max flow all the time ? The sizes you've computed for each branch seem reasonable at 6fps. For these short branches, you could use up to 10fps, provided these are not copper...

Suggest selecting a pressure vessel rather than a low pressure tank so you can minimise vaporisation losses - this should be possible for small storage volumes. Design pressure should provide sufficient headroom for inert gas padding and for daily nightime / daytime temp variations and its...

In some jurisdictions, relieving pressure (to reach required relief rate) for a multiple PSV setup with staggered settings cannot exceed 110% of MAWP, not 116% of MAWP. So pls check your national codes or Company design guidelines. You cannot pick and choose one relieving pressure for a PSV, and...

Presume the note below that composite curve for parallel operation which reads VZ503p + VZ503p is a typo error - should be VZ503p + VZ504p. If one were to make some assumptions on polytropic eff, there most likely is info here on the individual curves for VZ503p and VZ504p to enable calcs to...

When exhaust pressure is 14-15psia, in theory, LP and HP casings operating in parallel ought to give you much more than 35000cfm, but to pin this flow down (at least approximately), we need the performance curves for these 2 casings ( flow vs polytropic head and flow vs polytropic eff). It is...

Reading from your assessment of the 5MW machine when operating in parallel mode, "Together, they still do not quite equal the flow rate of the 2MW first stage, but it is still considerably better than the 5MW configured in a 2 stage arrangement.".. it sounds like you already know what flows...

Ok, agreed, immediate transient would adiabatic - isentropic expansion

@Tug, There was and there still is depleted uranium exposure cases too, I would imagine. Not surprised many are reluctant to join the Armed Forces, partly for this reason. These BTEX exposure related cases were documented in a BBC doco (BP oilfields around Basra) some 2-3years ago.

While reversible effects from exposure to H2S show up almost immediately, there are the more sinister and irreversible effects from associated long term exposure to petroleum fumes. Often results in blood disorders such as leukemia. Sometimes takes years for these disorders to show up. As an...

Presume the concern here is for this liquid with electrical conductivity < 50pS/m ? Re other concerns, see if this helps (section 2.5). https://www.matec-conferences.org/articles/matecconf/pdf/2021/12/matecconf_mse21_10013.pdf

See if you can get this jet plume thermal dispersion simulation done on a program like PHAST or similar. Its going to cost you some.

One way may be to absorb hydrogen chloride gas into 30% HCL in a packed bed absorber column under slight pressure, since HCL gas is quite soluble in water. See Fig 2-11 for enthalpy - concentration data and table 2-10 for vapor pressure of HCl vapor over HCL solutions in the 7th edn of Perry...

How did you figure temp may be 126.7degC ? Analogue temp gauges are notorious for wrong readings, do you have a temp transmitter readout for BFW at de aerator exit ? Flowing velocity down the main suction header should be max 1m/sec approx when all pumps are running full throttle. Do friction...

"followed by increasing the pressure on both sides simultaneously, but with a limit differential between them." Presume this is the tubeside hydrotest step ? Why the limit on diff pressure ? Tubeside should instead be raised to HT pressure with zero pressure on shellside ?

During maintenance, the surge drum should accomodate the max normal liquid inventory of at least the largest kettle in this closed loop ( and any upstream connected piping). So, if min operating level in surge drum is say 30%, and max is say 85%, this incremental volume should be the liquid...

Screw compressors are more reliable than recips.