OSIST prEN 14972:2004

Fixed firefighting systems - Watermist systems - Design and installation

This standard provides information for verifiable classification of watermist systems, according to their expected fire protection characteristics with reference to extinguishment, fire control or suppression.
It devises a series of specific test conditions to set out criteria capable of verifying performance claims of watermist systems, classify and determine the extent of their suitability for intended applications, whilst setting a minimum level of acceptable performance and/or safety.
As the fire test scenarios of this standard apply to a group of similar applications, by analogy the successful performance of watermist systems also applies to that group, as defined in annex A.
As individual watermist applications have varied requirements and duty, this European standard is intended to apply to both skidded stand alone and pumped systems. Aspects of watermist associated with explosion protection are beyond the scope of this standard. The standard is not intended to be used as a universal design manual of watermist, as different systems have different characteristics and hence follow different design criteria to satisfy their duty requirements. It is the approving authority's responsibility to assess and implement the design manual of specific watermist systems against the tests set out in this standard.
If the gas in the system is the major factor for extinguishing/suppression the relevant parts of EN 12094 are to be considered.