This document specifies requirements for transportable liquid oxygen systems that are common to both base units and portable units and requirements that are particular to base units.
Stationary liquid oxygen systems used for oxygen pipeline supply systems are excluded from this document.
NOTE 1        Throughout this document the term “units” is used where the requirement applies to both base units and portable units.
NOTE 2        ISO 18777 - 2 specifies those requirements particular to portable units.