Цитата(Sindarkon @ 6.11.2016, 19:18)
Я, конечно, статью не читать - комментарий писать, но там говорится о 40 футах в секунду, что есть 12 м/с, т.е. всяко выше разрешённой скорости.
И ТРВ_ВД - это, всё-таки, не дренчерные системы.
Я к тому, что NFPA 750 скорее всего именно то, что ищет топикстартер.
В документе FM Global FMDS0402 WATER MIST SYSTEMS нашлось следующее:
2.1.3 Calculations
2.1.3.1 Use the Hazen-Williams calculation method for hydraulic calculations for low-pressure systems with
no additives. The Hazen-Williams method also can be used for intermediate- and high-pressure systems
having a minimum pipe size of 3⁄4 in. (20 mm) if the maximum flow velocity does not exceed 25 ft/s (7.6 m/s).
For copper and stainless steel piping or tubing, Hazen-Williams C values of 150 may be used.
2.1.3.2 Use the Darcy-Weisbach calculation method for hydraulic calculations for intermediate- and highpressure,
single fluid, single-phase systems that cannot be calculated using the Hazen-Williams method (see
Chapter 6, NFPA 750, Standard on Water Mist Fire Protection).
2.1.3.3 Hydraulic calculations for twin fluid systems can be conducted as follows:
1. Determine water pressure required at the most remote nozzle using nozzle specifications supplied by
the manufacturer. Determine flow rates and pressure at each nozzle location.
2. Determine water pressure and flow rates at each nozzle from information provided by the nozzle
manufacturer.
3. Calculate the pneumatic piping system independently to verify the pipe sizes are adequate to provide
the required pressure and flow at each nozzle, and that the system is sized to provide the flow rate and
pressure needed
Гидравлический расчет ТРВ высокого давления, Где найти методики
18.10.2016, 15:53
