UL Standard for Safety Pipe Unions for Flammable and Combustible Fluids and Fire-Protection Service
|Publication Date:||15 December 2014|
These requirements cover pipe unions to be employed in piping carrying designated flammable or combustible fluids or in piping connections to equipment supplying water for fire-protection service.
"Flammable and Combustible Fluids," as used herein, means gases and liquids that are investigated and found to be flammable or combustible, such as acetylene, fuel oil, gasoline, kerosene, liquefied petroleum gas, and manufactured and natural fuel gases.
Requirements for the installation and use of the pipe unions covered by these requirements are included in the Standards of the National Fire Protection Association pertaining to storage and use of flammable and combustible fluids, such as: