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JonSMC
Working on Sci-fi projects.

Started with a Tardis: Outdoors with lighting and sound. Moving onto making Daleks.
S
Hi Shaga,
I hope you are doing well!
I am wondering if you have found the response to your question here:

"I have a question relate to the Hysys. fro example when pressure control is fail close it ..."

If so, could you please tell me how you ended up doing it,
Thanks!
K
Hi Neil, Cheng here. Sorry for bothering. It’s now 2025, and I’m still working on the settings for a SD14E relay. Similar to your post, I haven’t been able to find a manual for this relay. Would you be open to sharing any information you have on it? I’d really appreciate any help.
D
DK Engineering PLLC provides durable, high-quality building enclosure solutions, including roofing, waterproofing, exterior walls, and fenestration systems. We offer expertise in commercial building enclosure design, investigation, assessment, and commissioning, with additional capabilities in paving assessment and design. We are located in North Carolina.
R
Hi Nick,

You posted about corrosion on a progressive cavity pump suffering of severe corrosion. Would you mind telling me if you finally were able to determine the source of the corrosion? When I saw the pictures, I immediately thought about cavitation but you specifically discarded that possibility due to the lack of noise, what make sense.
Did you figure out what the problem was?
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D
Danish@9152
We fixed it by upgrading to corrosion-resistant materials, optimizing flow to reduce stagnant areas, and monitoring fluid chemistry more closely.

No cavitation, just aggressive chemistry!
P
Electrical Engineer with experience in Solar System, Power distribution and Variable frequency drives.
D
Daka Rqcheal
Hello Premendra,

Kindly school me on Solar System and VFDs. I am interested and would be more than grateful to learn from you.

Thank you.
T
Hi Mike.. .
I have read your post about Floor truss designing. If you have to need any help please tell me.
Green white
I have a pipeline with a DP of 900 psi that will be Hydrotested to 1125 psi


in this pipeline there are 6 ball valves to drain/ vent the pipeline. Those valves (rating # 600) and accordingly the max operating pressure for those valves are 1480 psi.

can I hydrotest the pipeline with valves in closed position, and without installing blind flanges because it is difficult to remove during the hydrotest?
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saha2
saha2
Hi:
Why are you removing the vent valves . Please blind them with appropriate blind flange on outlet side of these valves.

Regards,
Taicho567
Taicho567
Well I'd say it would not be necessary to test it at 1480psi because I'm pretty sure those valves have been tested at factories before shipped to site.
1125psi is suffice but this is only applicable at one end of the pipe (valve inlet end). You have to test the pipe at the outlet end too.

But you have to consider the valve leak rate, which may affect your result.

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