Dear colleagues,
I have recently seen a procedure for hydro test of atmospheric vats saying that they need to be filled with water and then remain filled for 24 hours.
In my case the vessel is 90 m3 316L vessel. The vessel was designed according to AD2000 and has a design pressure of 50 mbarg...
Dear colleagues,
I am currently working in a project which includes a decrease in the operating pressure of the stripper in the hydrobon unit (hydrotreatment of naphthas).
Due to this decrease the temperature on top of the column will decrease too and the area of the aereocondenser at the top...
Good afternoon colleagues,
I am currently designing a condenser that will complement a current aero condenser.
The new condenser is going to be an AES type with 8 passes on tubeside (cooling water), 131 tubes, H bundle layout and a 45º rotated square pattern (company standard for condensation...
Dear colleagues,
whilst designing a BEM heat exchanger for warming up natural (tube) gas with steam (shell), I came up with a tube velocity of 23,48 m/s (77 ft/s). This was obtained with a shell diameter of 10".Tube count =51 with 373 " tubes. material is carbon steel.
The density at process...
Good morning collegues,
I work in planta producing glycols. Last week my boss mentioned the possibility of producing a new grade in our products, food grade.
Could someone explain to me or lead to a resource about which are the main changes to be done in a chemical plant to be able to reach...
Good morning,
we are thinking of recovering more heat of a residue current for generating more steam.
The idea is to extend the lengths of the tubes of a shell and tube heat exchanger whils keeping the current diameter.
At the moment we basically heat a boilerfeedwater current and just produce...
Good morning colleagues,
Whilst specifying the design temperature for a pipe is quite straightforward, the maximum temperatura that can reach the fluid that flows across a certain pipe, I am not so sure when it comes to the design temperature on the tube side oh a shell and tube heatexchanger...
Dear colleagues,
We are designing a 8" pipe that needs to be steam traced (low pressure steam 4 barg). The specification of the pipe is ASTM A-312 Type 304 (stainless steel).
According to the customer specification all the tracing tubes should be done in 1/2" 150# carbon steel (ASTM A-53 Gr.B...
Dear colleagues,
I am designing a new 3" pipe for oxygen service. The pressure at the inlet will be 7 barg (101 psig). At the end of the line will be a pressure control valve, followed by an orifice plate and a flow control valve.
The material for the line will be seamless steel ASTM A-312 Tp...
Hello,
I came across the word Cutwater today and I have never seen before talking about pumps. (I think it's like an american word)The meaning is not very clear to me. Could someone just explian what is the cutwater?
Thank you
Hello,
As a waste stream from a process we have a strea that contains:
water, 8500 kg/h
ammonia 1.5 kg/h
NaCl 420 kg/h
CaCl2 1041 kg/h
the idea is to try to decrease the amount of ammonia. The first flash is from 1.7 bara to 1.4 (118 to 110.5 C)bara and...
Hi,
I am designing a scrubber to absorb the octanol present in a hydrogen stream. I am planning to do this with water (solubility of octanol in water @25 C is 0.05 %). The amount of octanol to me removed is 0.3-0.8 g/m3.
Has anyone got experience in the system octanol-water? I haven't got any...
Hi fellows,
I was doing some relief calculation numbers but there is something which I don't see very clear.
According to API 520 if I have a bursting disk and a relief valve after I:
-Use a 0.62 as discharge coeffcient for the bursting disk
-There is no combination correction factor for the...
Hi,
I am working in the area classification of a plant which involves some hydrogen pipes.
I am using the sources of release qualification method.
I have some formulas to calculate the horizontal extent of the zone. For example:
X = (920*Q/LEL)^0.55 (1)
Release from high level point source...
Hi everyone,
I have a tank with a baffle at the beginning. I am collecting some lights just before the baffle. I will like to drain these lights because otherwise they end entrained with the liquid. I want to install a pipe that finishes in a 4 or 6" funnel.
Which formula can I use to...
I am replacing an old knock out pot placed after a condenser with a new one. The knock out pot has no mesh on it (it is placed on a vent line and I prefer any mesh that could help in blocking the line)
Is the Souders-Brown equation the one to use despite not having a mesh?
I normally try to...
Pressure relief configuration
Dear colleagues,
I am designing a pressure relief configuration for a vessel. The relief system consists of a bursting disk followed by a relief valve and it is designed basically to prevent the overpressure in the vessel in case of an external fire.
After doing...
Hello. I am trying to simulate the distillation of a mixture composed by aroma chemicals, but at this atge I am mainly interested in the separation between water and benzaldehyde. Has anyone done something like this. I am not sure about which property model to choose with the hysys software...
Dear colleagues,
I've just started in a new factory and I've found a strange methodology to cool down the MeOH tanks (2000 m3). In the summer as the weather becomes very hot and during the hours of maximum sun radiation the open the water against fire system to cool them down.
I've found this...
Hello members,
At the moment i want to jacket a 1.5 inches pipe containing water with low pressure steam. Which U (heat trans coeficient) could i use to know which will be the exit temperature of the water at the end of the jacketed pipe?
Thanks.
(Please indicate units)
