BS 799-5:1987

Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Integral tanks
4. Service tanks
5. Oil storage tanks
6. Manholes and inspection openings
7. Heaters for oil storage tanks
8. Oil level indicators
9. Drain valves
10. Filling pipes and connections
11. Vent pipes
12. Outlet valves and pipes
13. Oil return pipes
14. Fire valves
15. Installation of tanks
Appendices
A. Pressure test
B. Overfilling of oil storage tanks
C. Information to be supplied by the purchaser
Tables
1. Minimum plate thicknesses for service tanks of
     types S3 and S5
2. Minimum plate thicknesses for storage tanks of
     types I and II
3. Minimum plate thicknesses for storage tanks of
     type A
4. Minimum plate thicknesses for storage tanks of
     types B and C
5. Minimum plate thicknesses for storage tanks of
     type D
6. Minimum plate thicknesses for storage tanks of
     types E and F
7. Minimum plate thicknesses for storage tanks of
     type G
8. Dimensions of steel cradles for storage tanks of
     type I
9. Dimensions of steel cradles for storage tanks of
     type II
10. Dimensions for cradles for storage tanks of types
     A, B and C
11. Manholes and inspection openings: minimum
     thicknesses of covers and maximum pitch of fixing
     bolts
12. Oil and water drain valves: minimum clearway
     openings for varying tank capacities
13. Filling pipes and connection sizes for oils
     classes C, D, E, F, G and H
14. Minimum storage and outflow temperatures for oils
     classes C, D, E, F, G and H
15. Equivalent height of vent: allowances for
     horizontal pipe runs, easy and sharp bends at a
     filling rate of 500 L/min and at a viscosity of
     16 mm squared /s
16. Equivalent height of vent: allowances for
     horizontal pipe runs, easy and sharp bends at a
     filling rate of 1000 L/min and at a viscosity of
     16 mm squared /s
17. Equivalent height of vent: allowances for
     horizontal pipe runs, easy and sharp bends at a
     filling rate of 1000 L/min and at a viscosity of
     370 mm squared /s
18. Equivalent height of vent: allowances for
     horizontal pipe runs, easy and sharp bends at a
     filling rate of 1000 L/min and at a viscosity of
     860 mm squared /s
Figures
1. Relationship between design head, pitch of stays
     or stiffening and plate thickness for rectangular
     service tanks of type S4 and rectangular storage
     tanks of types III, J and K
2. Relationship between design head, span between
     supports and plate thickness for rectangular
     storage tanks of types III, J and K
3. Shallow dished and flanged end
4. Dished and flanged end
5. Positions of steel cradles for storage tanks of
     type I
6. Positions of steel cradles for storage tanks of
     type II
7. Positions of cradles for storage tanks of types A,
     B and C
8. Typical arrangement of tank heaters with long
     heaters to spread heat in tank and short heater
     fitted on manhole.
9. Details of filling point with witness hole and
     protective cap
10. Details of filling point with groove and
     protective cap
11. Typical storage tank arrangements
12. Graph showing pressure developed when tank is
     overfilled with oils classes C and D at a filling
     rate of 50 L/min and at a viscosity of 16 mm
     squared /s
13. Graph showing pressure developed when tank is
     overfilled with oils classes C and D at a filling
     rate of 1000 L/min and at a viscosity of 16 mm
     squared /s
14. Graph showing pressure developed when tank is
     overfilled with oils classes E, F and G at a
     filling rate of 1000 L/min and at a viscosity
     of 370 mm squared /s
15. Graph showing pressure developed when tank is
     overfilled with oils classes E, F and G at a
     filling rate of 1000 L/min and at a viscosity
     of 860 mm squared /s

Requirements for carbon steel tanks for the storage of liquid fuel, used in conjunction with oil burning equipment. Includes integral tanks which form part of a complete oil fired unit, service tanks, and storage tanks with a maximum height of 10 m and capacities up to 150,000 L.