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The People Who Do PM
Published in Ryan Cruzan, Manager’s Guide to Preventive Building Maintenance, 2020
Another reason facilities outsource some PM inspections is that many required inspections can only be completed by contractors who are licensed to do specific types of work. While you can do monthly in-house tests of your fire alarm system, only a licensed company can complete the required semi-annual inspections of smoke detectors. Your fire suppression system will need to be inspected and flow tested by a certified company each year or more often depending on your industry. Elevators, boilers, and backflow preventions are just a few more items which will most likely need to be inspected or tested by a certified company or licensed individual. There is a listing of roughly a hundred different of pieces of equipment and their inspection and testing requirements in Chapter 11.
Fire Safety
Published in Mavis Sika Okyere, Fixed Offshore Platforms, 2018
Automatic fire suppression systems control and extinguish fires without human intervention. Examples of automatic fire suppression systems include fire sprinkler system, gaseous fire suppression and condensed aerosol fire suppression. When fires are extinguished in the early stages, loss of life is minimal since 93% of all fire-related deaths occur once the fire has progressed beyond the early stages.
Methodology in early detection of conveyor belt fire in coal transportation
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2020
Santosh Kumar Ray, Asfar Mobin Khan, Niroj Kumar Mohalik, Debashish Mishra, Nikhil Kumar Varma, Jai Krishna Pandey, Pradeep Kumar Singh
The proposed model incorporates the safety devices that have either been studied in literature or in practice at TSPL to control fire effortlessly. The model is prepared based on field and laboratory investigation studies. The laboratory and field data would be helpful to determine the threshold limit value (TLV) of the sensors. Figure 15 depicts a flowchart diagram for the process flow and sequence of procedure for early detection of conveyor belt fire and automatic fire suppression system. The flowchart starts with field investigation and laboratory investigation. The laboratory investigations include proximate analysis, critical oxidation temperature, differential scanning calorimetry, and fire ladder study. The results were used in determining the TLV for the respective parameters of the system. Sensors, namely linear heat sensing cable, temperature sensor, smell sensor, differential speed sensor, pull chord switch, and belt sway switch were used. These sensors were placed near the site at strategic locations. Alarm 1 is set in such a way that when linear heat sensing cable and temperature sensor crosses the threshold limits indicating an immediate danger of fire. The alarm1 is sounded and automatically deluge valve junction box (DVJB) and fire spray system activate. When the E-nose sensor or hydrogen sensor trips i.e. when values of CO and H2 crosses 50 ppm then alarm 2 is sounded and water mist is activated. As the generation of CO and H2 is the earliest indicator for the rising temperature, water mist can serve the purpose. Similarly, for hall-effect sensor, zero speed switch, belt sway switch, if there is a trip then alarm 3 is raised as these measured parameters do not pose an immediate threat of fire and therefore it is proposed to have housekeeping and manual interference in the system for immediate address of the problem. On the other hand, if any of the sensors do not trip then the process will go uninterrupted.