1. Recommended safe practices for the preparation for welding and cutting of containers and piping;ANSI/AWS F4,1999
2. Safe entry and cleaning of petroleum storage tanks;API Publication 2015,1994
3. Using inert gases for purging, blanketing, and transfers;Blakely;Chemical Engineering,1984
4. Properly purge and inert storage vessels;Kinsley;Chemical Engineering Progress,2001
5. Turbulent jets and plumes: A Lagrangian approach;Lee,2003