9 Testing 9.1 All tests shall be witnessed by designated representatives of Loss Prevention and Fire Protection prior to mechanical completion acceptance of the fire system. The performance flow test shall meet NFPA 11. 9.2 During testing of the foam system, the roof shall be floating at a level no higher than 50% of its maximum height. The installed foam system shall be performance tested with a gauge pressure of 1,035 kPa (150 psig) at the foam proportioning truck. The seal area shall be covered within 10 minutes of foam flow from the chamber to the extent as follows a. For existing tanks with a single foam chamber, 12 m from the chamber along the seal in both directions. b. For tanks with multiple fixed foam chambers and deflectors, the entire seal area. Note: It’s recommended to conduct performance testing of the foam system during the initial filling for hydrotest which will help avoiding product contamination that might occur if the test was done later. 9.3 The frequency of maintenance, inspection, and testing of fire protection equipment shall meet GI.
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 11 of 14 Saudi Aramco Company General Use Walkway Drain and Flange for Testing and Maintenance Solution piping (Riser) braced to tank shell Foam maker and foam chamber Tank shell Seal Shield Floating Roof Wind Girder mm mm DETAIL A Top of tank shell Foam backboard mounted above shell See Note VIEW B-B B 300 mm Walkway 300 mm Low Point Drain Grade See Detail ROAD Terminal Hose Connection(s) Slope Floating Roof m Pad: Carbon steel mm thickness) Deflector: Carbon steel mm thickness) Drain Slots, mm x 13 mm on m Centers approximate dimensions) Foam Dam VIEW C-C VIEW D-D Foam Chamber Maker Top Seal Foam Deflector Foam Dam 150 mm Note: For more details, see figures in NFPA 11 that Figure 1 was based on.