Engineering Standard


Figure 1 - Typical Foam Outlet Station Layout of Foam Chamber and Solution Piping Notes



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SAES-B-018

Figure 1 - Typical Foam Outlet Station Layout of Foam Chamber and Solution Piping

Notes: 1) Hose connection at top stairway platform is not shown.
2) Minimum height of backboard depends on the top position of the roof.
3) Riser and lateral pipe size shall be a minimum nominal diameter of 75 mm (inch NPS).

Document Responsibility Loss Prevention Standards Committee
SAES-B-018 Publish Date 13 February 2020 Next Revision 13 February 2025 Foam Systems Saudi Aramco 2020. All rights reserved
Page 12 of 14 Saudi Aramco Company General Use
Figure 2 - Multiple Foam Chamber Locations Tanks
>38 m (125 ft) Diameter - Typical Layout of Foam Chambers

Notes: 1) Two inch hose connections are required at top of tank stairs by the platform with supply piping located upstream of riser block valve.
2) For tanks that require multiple chambers, the number of chambers is specified in NFPA 11 one chamber perm ft of circumference.

Document Responsibility Loss Prevention Standards Committee
SAES-B-018 Publish Date 13 February 2020 Next Revision 13 February 2025 Foam Systems Saudi Aramco 2020. All rights reserved
Page 13 of 14 Saudi Aramco Company General Use

Figure 3 - Layout of Supply Piping to Hose Connections and Multiple Foam Makers

Notes: 1) Two inch male hose connection shall be accessible from top stairway platform.
2) Foam deflectors and foam backboards shall be offset from the wind girder walkway to avoid blocking entrance to floating roof.
3) Block valves) in lateral and riser to be car-sealed open (CSO).


Figure 4 - Layout of Riser with Inch Hose Connections
Wind Girder Handrail required, but not shown)
Stairway
Two

- inch Gated Hose Connections at Stairway Platform- inch Gated
Storz Hose
Connection
3
-
Inch
Riser
Lateral(s)
Foam Lateral Terminal
Connections with Block Valve at each Connection
Slope Lateral toward the Low Point Drain
Low Point Drain
Dike
Wind Girder Handrail required, but not shown)
Two 2½
- inch Gated Hose Connections at Stairway
Platform
Header to Foam
Chambers
Stairway
Chamber
-
Hose

Document Responsibility Loss Prevention Standards Committee
SAES-B-018 Publish Date 13 February 2020 Next Revision 13 February 2025 Foam Systems Saudi Aramco 2020. All rights reserved
Page 14 of 14 Saudi Aramco Company General Use

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