Foreword
1 Scope
2 Normative references
   2.1 General
   2.2 Additional normative references in annex C
3 Definitions and symbols
   3.1 Definitions
   3.2 Symbols
4 Technical agreements
5 Requirements
   5.1 Design pressure
   5.2 Design metal temperature
   5.3 Design density
   5.4 Yield stress
6 Materials
   6.1 Carbon and carbon manganese steels
   6.2 Stainless steels
7 Design loads
   7.1 Loads
   7.2 Load values
   7.3 Load combinations
8 Tank bottoms
   8.1 General
   8.2 Materials
   8.3 Design
   8.4 Fabrication
9 Shell design
   9.1 Design and test stress
   9.2 Internal loads
   9.3 Wind and vacuum loads
   9.4 Shell plate arrangement
   9.5 Shell joints
10 Fixed roof design
   10.1 Loads
   10.2 Type of roof
   10.3 Roof plating with supporting structure
   10.4 Roof plating without supporting structure (membrane
         roofs)
   10.5 Compression area at the junction of the shell and roof
   10.6 Venting requirements
   10.7 Floating covers
11 Floating roof design
12 Tank anchorage
   12.1 General
   12.2 Anchorage attachment
   12.3 Holding down bolt or strap
   12.4 Resistance to uplift during test
13 Mountings
   13.1 Shell nozzles O/D 80 mm and above
   13.2 Shell nozzles less than O/D mm
   13.3 Roof nozzles
   13.4 Studded pad connections
   13.5 Nozzle loads
   13.6 Flush type clean-out doors and water draw-off sumps
   13.7 Nozzle welding details
   13.8 Flange drilling
   13.9 Post-weld heat treatment of nozzles
   13.10 Heating and/or cooling systems
   13.11 Stairways and walkways
   13.12 Handralling
   13.13 Ladders
   13.14 Earthing connections
   13.15 Permanent attachments
   13.16 Temporary attachments
14 Insulation
15 Shop fabrication of tank components
   15.1 General
   15.2 Reception and identification of materials
   15.3 Handling and storage of materials
   15.4 Material markings
   15.5 Plate preparation and tolerances
   15.6 Preparation of nozzle components
   15.7 Plate forming and tolerances
   15.8 Openings
   15.9 Welding
   15.10 Surface conditions
   15.11 Marking for erection purposes
   15.12 Packing, handling and transport to site
16 Site erection and tolerances
   16.1 General
   16.2 Foundations
   16.3 Anchor points
   16.4 Handling and storage
   16.5 Rectification of parts damaged during transportation
         and handling
   16.6 Bottom plates
   16.7 Shell to bottom, and shell
   16.8 Fixed roofs
   16.9 Nozzles
   16.10 External attachments
   16.11 Internal attachments
   16.12 Temporary attachments
17 Approval of welding procedure and welders
   17.1 General
   17.2 Welding procedure approval
   17.3 Welding Procedure Approval Record (WPAR)
   17.4 Welders and welding operators approval
   17.5 Production control test plates
18 Welding
   18.1 General
   18.2 Welding sequences
   18.3 Welding of bottoms
   18.4 Welding of shell to bottom
   18.5 Welding of shell
   18.6 Welding of roof
   18.7 Temporary welds
   18.8 Atmospheric conditions
   18.9 Preheating
   18.10 Post-weld heat treatment
19 Testing and inspection
   19.1 General
   19.2 Qualification of NDT personnel
   19.3 Test procedures
   19.4 Type of inspections and examinations
   19.5 Dye penetrant test
   19.6 Magnetic particle examination
   19.7 Vacuum box test
   19.8 Soap bubble examination
   19.9 Radiographic examination
   19.10 Ultrasonic examination
   19.11 Acceptance criteria
   19.12 Dimensional check
   19.13 Hydrostatic and pneumatic tests
   19.14 Empty checks
   19.15 Accessories
   19.16 Additional examinations and tests
20 Documentation and name-plate
   20.1 Documentation
   20.2 Name-plate
Annex A (normative) Technical agreements
Annex B (informative) Operational and safety considerations
        for storage tanks and storage installations
Annex C (normative) Requirements for floating covers
Annex D (normative) Requirements for floating roofs
Annex E (normative) Requirements for floating roof seals
Annex F (normative) Selection of carbon and carbon manganese
        steel plate to alternative specifications
Annex G (informative) Recommendations for selsmic provisions
        for storage tanks
Annex H (informative) Recommendations for other types of tank
        bottoms (double bottoms, elevated bottoms etc.)
Annex I (informative) Recommendations for tank foundations

Annex J (informative) Example calculations of stiffening
        rings (wind girders)
Annex L (normative) Requirements for venting systems
Annex M (informative) Tank anchorages
Annex N (informative) Weld details for the connection of
        mounting
Annex O (informative) Flush-type clean-out doors and
        water draw-off sumps
Annex P (informative) Heating and/or cooling systems
Annex Q (informative) Recommendations for the design and
        application of insulation
Annex R (normative) Surface finish
Bibliography