API 12F : 2008

1 Scope
  1.1 General
  1.2 Compliance
2 References
3 Definitions
4 Material
  4.1 General
  4.2 Plates
  4.3 Sheets
  4.4 Welding Electrodes
  4.5 Structural Shapes
  4.6 Piping
  4.7 Flanges
  4.8 Couplings
  4.9 Bolting
5 Design
  5.1 General
  5.2 Joint Design Definitions
  5.3 Size of Weld
  5.4 Joint Restrictions
  5.5 Size
  5.6 Bottom Type Design
  5.7 Thickness
  5.8 Joints in Bottom Plates
  5.9 Shell Attachments
  5.10 Shell Thickness Design
  5.11 Shell Joints
  5.12 Deck Type Design
  5.13 Thickness
  5.14 Deck Joints
  5.15 Shell Attachment
  5.16 Cleanout Design
  5.17 Connections Design
  5.18 Anti-channel Drain Baffle Design
  5.19 Downcomer Pipe
6 Venting Requirements
  6.1 Normal Venting
  6.2 Emergency Venting
7 Fabrication, Testing, and Painting
  7.1 Fabrication
  7.2 Welding
  7.3 Testing
  7.4 External Painting
  7.5 Internal Coating
8 Marking
9 Inspection and Rejection
  9.1 Inspection Notice
  9.2 Inspection by Purchaser
  9.3 Rejection
  9.4 Compliance
Annex A (normative) - Specification for Tank Bolting
Annex B (informative) - Recommended Practice for Normal Venting
Annex C (informative) - Recommended Relieving Capacities
Annex D (normative) - Walkways, Stairways, and Ladders
Annex E (informative) - Suggestions for Ordering Shop Welded Tanks
Annex F (informative) - Use of the API Monogram by Licensees

Describes material, design, fabrication, and testing requirements for shop-fabricated vertical, cylindrical, aboveground, closed top, welded steel storage tanks in various standard sizes and capacities for internal pressures approximately atmospheric.