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Which system is installed to extinguish fire of liquids having flash point below 65°C?

Which system is installed to extinguish fire of liquids having flash point below 65°C? Correct Answer MVWS

Explanation:

Water Spray System 

  • Water Spray System is a special fixed pipe system connected to a reliable source of pressurized water supply and equipped with water spray nozzles for application on area/equipment to be protected. The system can be operated automatically by connection to an automatic detection and alarm system or manually, or both.
  • Water spray systems are generally used for fire protection of flammable liquid and gas storage tanks, piping, pumping equipment, electrical equipment such as transformers, oil switches, rotating electrical machinery, etc., and for protection of openings in firewalls and floors.
  • The piping system is connected to the water supply through an automatically actuated Deluge Valve, which initiates the flow of water. Automatic actuation is achieved by the operation of automatic detecting equipment installed along with water spray nozzles. There are two types of systems namely High Velocity and Medium Velocity systems.

Types of Water Spray System:

  1. Medium Velocity Water Spray Systems (MVWSS) are used for fire protection of areas with fire risks from low FP flammable liquids (FP below 65°C) and also for fire extinguishment of water-miscible liquids (polar solvents, alcohols, etc.) small installation as it becomes cost-effective and also serves the purpose of safety and location identification is easy.
  2. High-Velocity Water Spray Systems (HVWSS) are used for the extinction of fires in flammable medium and heavy oils or similar flammable liquids having a flashpoint above 65°C. (E.g. Transformer Fires, Lube Oil Tanks, Etc).

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