IS 15505 : 2004 Gaseous Fire Extinguishing Systems - HCFC Blend A Extinguishing Systems

1 Scope

1.1 This standard sets out specific requirements for the designand installation of total flooding fire-extinguishing systemsemploying HCFC blend A gas extinguishant. This standard isapplicable to single supply as well as distributed supply systems.

1.2 This standard complements various general requirementsapplicable to all types of gaseous fire-extinguishing systems(Halocarbon as well as Inert gas systems) listed in IS 15493. Assuch, both these standards should be read together before designinga system. Where requirements in both the standards differ, thisstandard shall take precedence.

1.3 This standard covers total flooding systems of HCFC blend Aoperating at nominal pressures of 2.5 MPa and 4.2 MPa only at21�C.

2 Reference

IS 15493 : 2004 Gaseous fire extinguishing systems - General requirements