API 2016 : 2001
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
GUIDELINES AND PROCEDURES FOR ENTERING AND CLEANING PETROLEUM STORAGE TANKS
Hardcopy , PDF
06-28-2021
English
01-01-2001
1 GENERAL
1.1 Scope
1.2 Applicability
1.3 Regulatory Requirements
1.4 Administrative Controls and Procedures
2 REFERENCES
2.1 Codes, Standards, and Related Publications
2.2 United States Government Regulations
2.3 Other Publications and References
3 DEFINITIONS
3.1 General
3.2 Definitions
4 PETROLEUM STORAGE TANK HAZARDS
4.1 Hazards
4.2 Oxygen Deficiency and Enrichment
4.3 Fires and Explosions
4.4 Toxic Substances
4.5 Stress Exposures
4.6 Physical and Other Hazards
5 VAPOR AND GAS FREEING, DEGASSING, AND VENTILATING
TANKS
5.1 General
5.2 Vapor and Gas Freeing (and Degassing) Hazards
5.3 Mechanical Vapor and Gas Freeing
5.4 Steam Vapor Freeing
5.5 Natural Ventilation
5.6 Inert Gas Purging
5.7 Displacement of Vapors Using Water (Fuel Oil)
5.8 Degassing
6 REMOVING SLUDGE AND RESIDUE FROM TANKS
6.1 General
6.2 Pumping and Vacuum Equipment
6.3 Safe Removal Precautions
6.4 Noninvasive Removal
6.5 Removal from Outside the Tank
6.6 Removal from Inside the Tank
6.7 Sludge Disposal
7 UNIQUE TANKS
7.1 General
7.2 Very Large Tanks
7.3 Floating Roof Tanks
7.4 Double Wall and Double Bottom Tanks
7.5 Low Pressure Storage Tanks
7.6 Conservation Tanks
8 SPECIFIC HAZARDOUS SUBSTANCES
8.1 General
8.2 Tanks with Pyrophoric Iron Sulfide Deposits
8.3 Cleaning Tanks With Products That Contain
Hydrogen Sulfide (H 2 S)
8.4 Tanks That Have Been In Leaded Service
8.5 Tanks Containing Hazardous Sludge and Residue
9 CONTROL OF IGNITION SOURCES
9.1 General
9.2 Internal Combustion Engines
9.3 Electrical Motors and Generators
9.4 Artificial Lighting
9.5 Electrical Bonding
9.6 Lightning Storms
9.7 Pyrophoric Iron Sulfide Deposits
9.8 Hot Work
9.9 Smoking
10 TANK CLEANING CHECKLIST
10.1 General
10.2 Preplanning
10.3 Removing Recoverable Product
10.4 Tank Isolation
10.5 Vapor-Freeing the Tank
10.6 Atmospheric Testing
10.7 Cleaning the Tank
10.8 Working Inside and Around the Tank
10.9 Returning the Tank to Service
10.10 Recommissioning
10.11 Recommissioning Safety Check
11 OXYGEN, COMBUSTIBLE GAS, AND TOXIC SUBSTANCE
INSTRUMENTS
11.1 General
11.2 Oxygen Monitors
11.3 Combustible Gas (Flammable Vapor) Indicators
11.4 Toxic Substance Testing Instruments
12 FLOATING ROOF HAZARDS ASSOCIATED WITH TANK CLEANING
12.1 General
12.2 Applicability
12.3 Floating Roof Stability
12.4 Floating Roof Legs
12.5 Roof Failure and Collapse
12.6 Entry Onto or Below Floating Roofs
(and Into Pontoons)
12.7 Inspections
12.8 Floating Roof Temporary Support Requirements
Figures
Tables
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