Measuring vented gas

[tmoser]

Does anyone know of a reliable method for measuring the amount of gas vented from a high point in a supposedly liquid-filled pipe? Some of the gas ends up being in a frothy mixture of water and gas during the venting process. Thanks for any ideas.

 

[samuelliu]

For small amount of vented gas, API-527 can be referred to, i.e., in bubbles per minute.

 

[hacksaw]

the amount of gas vented depends on it solubility, temperature, and pressure; in addition to the amount of dis-engagement you provide, etc..

at what pressure are you collecting the gas?

 

[ChasBean1]

Vent it into an evacuated tedlar bag with a shutoff hose bib. After venting, close the bib and submerse the entire bag in a graduated water sump to find the total volume displaced. Subtract the empty bag volume and water displacement resulting from the dunking method. Then drain the water from inside the bag into a graduated cyliner to find the water volume. It should be condensed by then. Seeing that you're nuclear, I wonder if you're talking about a pressurizer and the radcon difficulties might outweigh the feasibility of this! Also if this is a hot vent, might also need to rethink a little (e.g., run through a copper coil in an ice bucket prior to entering the bag)..