Hi All.
I have a simple question but I am not sure if the answer is that simple.
Is it possible to ensure that a component always incresases its temperature regardless the temperature of the cooling media?
The question comes from the test of an electronic component.
My specification requires...
Hi All.
I have a question regarding the number or cycles for a valve during a pressure fatigue test
I have in front of me a technical specification where the number of pressurization cycles depending at pressure test (based on the MAWP) are:
68.000 pressure cycles @ 1,5 MAWP
175 pressure...
Hi All.
I have a question regarding the maximum speed in pipes for sea water and hydraulic fluids.
I have a technical specification for a marine system and it is stated the following values for speed.
Nominal Service Velocity: 2 m/s
Maximum Service Velocity: 4 m/s
Exceptional Service Velocity...
Hi All.
Could anyone help me with this question?
How long should a pressure test last?
Is it reassonable that a pressure test lasts 15 minutes?
I cannot rememeber what ASME or BS PD5500 say about it and I would like to know if there is any standard that specifies 15 minutes.
On the other...
Hi there.
I have a question regarding the admissible values for leakage rates during a tightness pressure test.
I was given the rates for internal leakages in valves for sea water based on the DN as:
DN litres/h
6 0.05
8 0.08
10 0.08
15 0.15
20 0.2
25...
Hi All.
I have a question regarding the human maneouvring effort for opening and closing a valve.
I have an specification regarding the maximum permissible tangencial force based on the maximum lever and the handwheel diameter.
The application of this valve is for sea water in a submarine...
Hi there.
I am new here and this is my first post.
I have received a pressure test procedure and the pressurization and depressurization speed are 5 bar/s and 10 bar/s.
I am not sure if these values come from any standard or are the good engineering practices for pressure test speed.
Could you...
