API 2013 : 1991

Section 1 - General
1.1 Scope
1.2 Definitions
1.3 Referenced Publications
1.4 Hazards
1.5 Ventilation
Section 2 - Draining the Mobile Tank
2.1 Location
2.2 Draining the Tank
2.3 Internal Emergency Valves, Vents, Lines and Meters
2.4 Stainers and Filters
2.5 Bottom Loading Connections
Section 3 - Gas-Freeing the Tank
3.1 General
3.2 Filling the Tank with Water
3.3 Limitations of Filling the Tank with Water
3.4 Steam Injection
3.5 Limitations of Steaming
3.6 Tank Ventilation
Section 4 - Gas-Freeing Tanks that Have Contained
            Viscous Materials
5.1 Double Bulkheads
5.2 Box-Type Bolsters
5.3 Insulated Tanks
5.4 Vehicle Fuel Supply Tank
5.5 Other Enclosed Spaces
Section 6 - Tank Inspection
Section 7 - Tank Repair
7.1 Hot Work on Tank Compartments
7.2 Hot Work on Nontank Areas
7.3 Repairs Not Requiring Hot Work
7.4 Tank Entry
7.5 Extended Storage
Section 8 - Personal Protection

Describes measures that should be taken to safely vapor free and clean mobile tanks used in the transportation of flammable or combustible liquids. Coverage includes hazards, ventilation, steam injection, insulated tanks, tank entry, bottom loading connections, vehicle fuel supply tank, draining the tank, hot work on tank compartments, and limitations of filling the tank with water. Also gives detailed definitions.