Integris also makes similar venting drum bungs and tote caps. For example, they are a must when shipping >10% hydrogen peroxide. DOT requires these be installed for any material that can build up enough pressure within a container, under normal handling conditions, to cause the container to over-pressure and fail. Barry Larry D. McLouth wrote: > Has anyone ever used vented caps such as those produced by Performance > Systematix Inc? These have liners made of expanded PTFE that are > liquid tight but allow gases and vapors to permeate, thus reducing > pressure build up. They are normally used to replace standard chemical > container caps for chemicals that offgas. > > If you've used them what is your opinion of them? > > Do you know of other sources of vented caps (i.e., other than > Performance Systematix Inc)? > > Regards > > Larry > >
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