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  2. Hydraulic calculation - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_calculation

    Hydraulic calculations indicate that the combination of the two primary components of a water based fire protection system will meet the design objectives to control, suppress, or extinguish a fire: The available water supply is sufficient in flowrate and pressure. The pipe sizes and piping network arrangement that deliver the water to the ...

  3. Fire sprinkler system - Wikipedia

    en.wikipedia.org/wiki/Fire_sprinkler_system

    A fire sprinkler system is an active fire protection method, consisting of a water supply system providing adequate pressure and flowrate to a water distribution piping system, to which fire sprinklers are connected. Although initially used only in factories and large commercial buildings, systems for homes and small buildings are now available ...

  4. Standpipe (firefighting) - Wikipedia

    en.wikipedia.org/wiki/Standpipe_(firefighting)

    External access point for fire sprinkler and dry standpipe at a building in San Francisco, US Antique wet standpipe preserved at Edison and Ford Winter Estates. A standpipe or riser is a type of rigid water piping which is built into multi-story buildings in a vertical position, or into bridges in a horizontal position, to which fire hoses can be connected, allowing manual application of water ...

  5. Water flow test - Wikipedia

    en.wikipedia.org/wiki/Water_flow_test

    A process to perform a water flow test is explained in the model fire codes as published by NFPA (National Fire Protection Association). If a water supply source is considered weak compared to what is required by the sprinkler system design hydraulic calculation, the water pressure can be boosted by means of a fire pump.

  6. Sprinkler fitting - Wikipedia

    en.wikipedia.org/wiki/Sprinkler_fitting

    The fire suppression piping may contain water, air (in a dry system), antifreeze, gas or chemicals as in a hood system, or a mixture producing fire retardant foam. Sprinkler fitters work with a variety of pipe and tubing materials including several types of plastic, copper, steel, cast iron, and ductile iron. [3]

  7. Ex-NYC Rep. Michael Grimm ‘paralyzed from chest down ... - AOL

    www.aol.com/ex-nyc-rep-michael-grimm-201617293.html

    The 54-year-old Marine veteran is being treated at Kessler Institute for Rehabilitation in New Jersey — where late “Superman’’ movie star Christopher Reeve also recovered after being ...

  8. Hazen–Williams equation - Wikipedia

    en.wikipedia.org/wiki/Hazen–Williams_equation

    The Hazen–Williams equation is an empirical relationship which relates the flow of water in a pipe with the physical properties of the pipe and the pressure drop caused by friction. It is used in the design of water pipe systems [ 1 ] such as fire sprinkler systems , [ 2 ] water supply networks , and irrigation systems.

  9. What will happen to Social Security under Trump’s tax plan?

    www.aol.com/finance/happen-social-security-under...

    Trump’s plan to eliminate taxes on Social Security benefits would help current beneficiaries, but future recipients may be hurt by the move.