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Hello everyone, My client is pretending to expand steam at 200 bar and 370 ºC up to 56 bar and 270 ºC which means that this steam goes from nearly saturated to fully biphasic. He thinks it can be done by a valve and after that separate steam from water. However, I have always though that...

Good morning, I have a installation which needs Nitrogen. I am using Nitrogen gas cylinders. The issue is that I have simulated the expansion proccess in a very simple way: - Inlet line with fixed flow and pressure (around 200 bar) - Pressure reducer valve - Outlet line. Same flow (mass) and...

Good afternoon, I am designing a pressure filter with a design pressure of 6 bar. There are 24 of them working in parallel, all outlets end in a common collector and this collector goes to some cartridge filters. This main header has not any valve. However, this header has a bypass that in...

Thanks metengr. One more doubt regarding this issue. This higher allowable stress, can be used under permanent conditions? What I mean is that in my design I am going to work permanently at 750 ºK, can I used 17.2 ksi if I allow some permanent deformation?

Hi everyone, I am doing some calculations with piping ASTM SA312 TP321. I am having some troubles deciding which is the maximum allowable stress since ASME 31.1 allows 2 different values for 750 ºK: 12.7 and 17.2 ksi. The diffrence between them is that for the value 17.2 the following note...

Thanks a lot. I have been having a look through the web and: - I apparently ASME VIII allows the use of this kind of systems for vessel protection. Do you know if ASME 31.3 and 31.1 allows the use of HIPPS??? - In all cases I have found in the web, the final elementis a valve. Do...

Hi everyone! Recently I have been involved in the design of a hydraulic circuit with heavy pumps. The prblem came when we studied the shut off case. In case of shut off the piping were not able to stand the pressure so we decided to install PSV valves. Normally, this is not a problem, but in...

Hi all, First of all I answer your questions: 1.- We do not have temp measure in Plan 52. 2.- Same as the process fluid: Dowthwrm A. The fact is that we are observing that the seal faces are degrading themselves very quickly (at least much faster than expected). Some more comments: 1.- It is...

By the way, seal faces are: SIL CAR and Carbon. Is carbon suitable for high temp?

I attach a drawing where you can see the materials. Mainly: 316 SS, SIL CAR, C-276, 304 SS... most of them correct for high temp, except for the gaskets which are FFKM... am I right? The seal is Flowserve...

I have a C2A3A235261 flowserve mechanical seal: Category 2--Arrangement 3--Type A. Do someone know the temperature limit for this kind of seals? I have done some research through the internet and apparently Category 2 can work up to 400 ºC (750 ºF). However when it is type A... the temperature...

I rather prefer option one since the power consumption will be lower since the density of the water pumped will be higher (due to the lower temp). Although this difference will not be very high since the density of the water does not experience great changes.