I need to change how five vessels are air-freed*. The current procedure drops the non-condensable concentration to at least 10% and perhaps, < 1%. Once cleared of non-condensables, this aqueous process operates at 200 F continuously without venting. The reactor has a partial jacket (~ 1/3" of...
I have a compounding process that releases a trace amount of 2,5-dichlorophenol CAS 583-78-8 but it has a very strong smell. I have only found an undocumented odor threshold concentration (OTC) in water.
Since the odors are a strong function of structure, and vary by orders of magnitude, I...
Our plant handles methanol and xylene and I would like your thoughts on the practices used when cleaning the tanks. They fill and drain out the water and then run a flashpoint on the residual water (~ 100 F) judging the tank is clean and air can be admitted into the tank when the flashpoint is...
don1980
Is there any literature you could point me to about using the design U as an acceptable short cut? Maybe I overlooked it, but I didn't find API 521 discussing that approach. They explicitly do remark on ensuring the fouling factors are removed from the calculation.
The tube rupture case is valid. In this case the steam side has the lower MAWP so the broken tube scenario sets the steam side relief. Is there some factor that influences the relief for the CO2 side of the vaporizer?
I would like advice for the blocked in case for the CO2 side of a vaporizer. The control logic will allow the steam side to reach the header steam pressure. As I understand it the blocked-in venting starts as a liquid expansion case, but as soon as the valve opens vaporization begins and heat...
Because of a start-up I am having to do things that beyond my skill set. I have no prior experience with Experion, but need to capture fast data rather than the standard historian data. The data points were already in groups. I went to the historian and took out the entries in the standard...
I have a new 10" rupture disk tail pipe to route, and specified it must be above the nearest building eve by 10 feet, and if an eve was within 20 ft, I requested the line be routed up past that higher roof eve on the "penthouse". I did it to maximize dispersion, for high velocity outflows and...
My state (TX) is not a code state, so the code stamp and NB registration could be waived, if all parties agree. This brings me back to whether there is a method to accept this device, and meet my intent.
How to ensure the CE marked component is suitable for the intended service, and...
Very informative, thank you both very much. The pressurized air square tubular housing is integrated with a set of solenoid valves that penetrate through the tubular housing. It's the vendors proprietary design, so being locally refabricated may not be an option. Having them manufacture new...
I have a component that was fabricated in Europe, which has the attached nameplate. The item is a 7"x7"x36" rectangular box on the side of a reverse pulse jet baghouse. The square tube has one longitudinal weld, corners are bends, and the ends are flat plates. The box operates at 55 psig at...
I am updating piping specifications, and haven't been able to confirm the pressure rating for compression couplings. So far a VERY frustrating search.
Morris Coupling, INC, sells these two prototypical configurations
these "lower pressure" couplings use 3 to 6 bolts to clamp the rubber sleeve...
I have an ASME code vessel running 85% liquid full, which fire exposure would result in the PRD lifting. The material would be just below the pseudocritical condition during the relief. Downstream there is and an undersized flare, when I compute the valve size by API-521 with the minimum...
I have operating scenarios that could overpressure an existing 600 class flanged nickel piping system. The flanges are the weak link rated for 720 psig up to my maximum operating temperature of 500 F. I plan on replacing the RFWN with a lap joint. I would use straight grade 316 Lap Joint...
I made a mistake, I meant to say underpredicted the pressure increase by 10%. I will include a pressure curve tomorrow morning, when I return to the office.
I tried to model a fan as an isentropic compressor in Aspen Plus. I computed adiabatic head from the manufacturers static dp Vs flow curve, then entered the head Vs suction conditions volume flow rate as tabulated data. However the results overpredict the pressure increase by 10%. Is static...
I am trying to establish how to install a sensor so that the installed accuracy is at least +/- 5% (would like +/-3%) in square/rectangular duct with less than the normal L/D availble. I have an FCI thermal mass meter, but would be willing to buy a new multipoint meter, if it is unlikely to work...
The material is discharged toward the incline by a delumper mounted ~ 3 ft up, which sprays the small particles out in a number of directions. The discharged solids hit the housing and vertical duct, resulting in them falling with those that rain straight down onto the inclined plate...
