nike123
03-09-2014, 10:37 PM
Does anyone have any documentation about acceptable leak rate when we do vacuum leak test!
I am unable to find any literature except one precommisioning documentation from my recent job at oil field equipment in Kazahstan.
In that documentation is stated that after isolation of system from vacuum pump when it is 500 microns has achieved and held for specified time, system pressure should not rise more than 100 microns per hour. Monitoring time should be at least 4 hours after 1 hour of initial monitoring (where pressure should not rise at rate more than 100 microns or else evacuation should be continued). And, end vacum after these 5 hours of monitoring should not rise above 1000 microns.
I am unable to connect, let say, 0,5g/y of R22 leak with vacuum gage leak rate in microns per hour.
Here is some literature about that, but I am still unclear how to connect these two numbers.
http://www.vtechonline.com/pdf/VTech%20Leak%20Detection%20Methods.pdf
Question is inspired with this video:
https://www.youtube.com/watch?v=cI6pSBaskjc
I am unable to find any literature except one precommisioning documentation from my recent job at oil field equipment in Kazahstan.
In that documentation is stated that after isolation of system from vacuum pump when it is 500 microns has achieved and held for specified time, system pressure should not rise more than 100 microns per hour. Monitoring time should be at least 4 hours after 1 hour of initial monitoring (where pressure should not rise at rate more than 100 microns or else evacuation should be continued). And, end vacum after these 5 hours of monitoring should not rise above 1000 microns.
I am unable to connect, let say, 0,5g/y of R22 leak with vacuum gage leak rate in microns per hour.
Here is some literature about that, but I am still unclear how to connect these two numbers.
http://www.vtechonline.com/pdf/VTech%20Leak%20Detection%20Methods.pdf
Question is inspired with this video:
https://www.youtube.com/watch?v=cI6pSBaskjc