IOR: new Guidance Note on Draining Oil on Ammonia Plants

This guidance note provides guidance on the different methods used to manage oil in ammonia refrigeration systems.  It supersedes guidance note GN17 which has been withdrawn. In this guidance note the term “oil” is used to cover a range of lubricants including mineral oil, synthetic oil, processed mineral oil (for example, hydrocracked oil) and other synthetic compounds such as alkyl benzene, polyalkyl glycol, polyol ester and polyalfaolefin.  Not all of these synthetic compounds are compatible with ammonia.