Hi,
I normally carry out vacuum and/or pressure tests with nitrogen to leak test equipment on our site. If it fails we go round every flange/joint with oxygen monitors to track down the leaks. This can be time consuming and not always 100% effective as some joints can be awkward to access.
Has anyone ever came across a more effective means of leak testing. I was thinking maybe a smoke test that would be suitable (i.e. no residue/contaminates) on chemical processing equipment that could provide a more visual and effective means of finding even the smallest of leaks. We also have a large belt filter which, because of its tight pressure rating, we can't carry out a particularly robust high pressure (15mbarg) or vacuum test (-3mbarg) and so would benefit from a smoke test approach i think.
Any experience or tips is much appreciated.