In order to upgrade and bring a non-standard API unit to the world class facility complying American standards of operations, various process parameters and related drawings developed. An interesting assignment of understanding the current operations and maintanance procedures, physically collecting each individual equipment details, tracing details of Process, Mecahnical, Piping and Instrumentation, working on developing tagging philosophy, nomenclature and developing complete set of key documentation to identify areas of improvement and upgradation.