Home » IS 5290:1993 – Landing Valves

IS 5290:1993 – Landing Valves

Fire Hydrant & Sprinkler Standards

by Fire Safety Nation
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Scope and Application

IS 5290:1993 applies to landing valves installed in internal fire hydrant systems in multi-storeyed buildings, commercial complexes, and industrial structures. These valves enable fire personnel to quickly connect hoses to the water supply at accessible points on each floor, facilitating efficient firefighting and evacuation efforts.

Construction and Design Features

  • Valve Body:
    Typically constructed from corrosion-resistant brass, bronze, or cast iron, landing valve bodies are designed for durability and resistance to wear, corrosion, and thermal stress.
  • Operating Mechanism:
    The valve uses a quarter-turn or multi-turn operating handle, providing smooth, reliable control of water flow. The design ensures quick opening and closing to regulate discharge.
  • Outlet Connection:
    The standard mandates a compatible coupling interface for fire hoses, usually instantaneous or threaded type as per IS 12232, ensuring secure and leak-proof attachment.
  • Inlet Connection:
    The valve’s inlet connects to the internal hydrant piping and is designed to sustain high water pressures typical of fire suppression systems.
  • Non-Return Valve (NRV):
    Integrated NRVs prevent backflow, protecting the potable water supply and maintaining system integrity.
  • Drain Valve:
    Some landing valves incorporate a drain feature to allow removal of residual water, preventing freezing or water stagnation in the piping during non-use periods.

Performance and Testing Requirements

  • Pressure Rating:
    Landing valves must withstand minimum working pressures of 12 bar and be tested hydrostatically up to 24 bar to confirm mechanical strength and leak tightness.
  • Leakage Criteria:
    Under operating pressure, the valve must exhibit zero leakage both when closed and when in operation, ensuring safety and operational reliability.
  • Operational Durability:
    Valves should endure repeated cycles of opening and closing without degradation in performance or sealing capability.
  • Temperature Resistance:
    The design must accommodate temperature variations typical in building environments without material or functional failure.

Installation Guidelines

  • Location:
    Landing valves are installed in easily accessible locations on each floor’s fire hydrant riser, typically inside fire hose cabinets or designated alcoves.
  • Orientation:
    Proper orientation is essential to facilitate quick hose connection and valve operation by firefighters.
  • Clearance:
    Adequate clearance around the valve ensures unhindered access and operation during emergencies.
  • Signage and Identification:
    Clear marking of landing valve locations is required for rapid identification by firefighting teams.

Maintenance and Inspection

  • Regular functional testing and inspection are critical to verify valve operation and detect corrosion, leakage, or mechanical faults.
  • Periodic lubrication of moving parts and replacement of worn seals maintain operational readiness.
  • Documentation of maintenance activities supports compliance with fire safety regulations and aids in troubleshooting.

 

Conclusion

IS 5290:1993 standardizes landing valves to ensure robust, reliable water delivery points within fire hydrant systems. Proper design, installation, and maintenance per this standard are vital to facilitate rapid firefighting response and enhance building fire safety infrastructure.

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