FDT software presentation

Arjan ten Broeke, Services EMEAArjan ten Broeke, Services EMEA

Features SprinkFDT

• Calculate the time to trip the dry valve and the time to deliver water towards the open sprinkler(s).

• 1st UL listed and FM approved program of this type as defined by NFPA 13, chapter 7.2.3.6.

• Send files electronically and let the AHJ review the calculation using the free viewer.

• Software can be used to calculate dry and pre-action systems

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• Software can be used to calculate dry and pre-action systems

• Additional information: www.sprinkcad.com

11.2.2 Size of installations

The net volume of the pipework downstream of the control valve set shall not exceed that shown in Table 18, unless a calculation and test shows that the maximum time between a sprinkler opening and water discharging is less than 60 s.

According BS EN12845

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11.1.3 Size of installations

The maximum area controlled by a single wet alarm valve, including any sprinklers in a subsidiary extension, shall not exceed that shown in Table 17.

According BS EN12845

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Fluid Delivery Time

Water delivery time is primarily determined by:

�The configuration and volume of the piping network

�System air pressure at the time of accelerator trip

�Number and orifice size of open sprinkler(s)

�Water supply characteristics

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Example Dry system: Calculation of a dry system

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•To meet up with the required Fluid Delivery Time according the standard (EN12845, NFPA13, FM, VdS…).

•Predict the Fluid Delivery Time in the engineering phase.

•To reduce the amount dry alarm valves, feed connections, shut off valves, air maintenance devices and ITC’s.

Example Dry system: Purpose

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�Standard: BS EN12845

�Hazard class: HHS

�System type: Dry

�Required density: 12,5 mm/min

�Area of operation: 325 m2

�Total area: 90 x 80 = 7200 m2

Example Dry system: Design parameters

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�Total area: 90 x 80 = 7200 m2

�Distance between sprinklers: 3 meter

�Distance between branch lines: 2,5 meter

�Area per sprinkler: 7,5 m2

�Number of sprinklers: 960 pieces

Steps:

1.Determine the design parameters

2.Design the system

3.Determined the diameters

4.Calculate the demanding remote area

5.If necessary adjust the diameters of the system and recalculate

Example Dry system: Steps

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5.If necessary adjust the diameters of the system and recalculate

6.Select a suitable pump

7.Calculate the Fluid Delivery Time for the most demanding sprinkler

8. If necessary redesign and calculate the system to have the water delivered within 60 seconds and that the hydraulic demand is within the pump curve

• FDT calculation proves and allows a dry system with a volume of … dm3 to be supplied with one Dry Pipe Valve.

• According table 18 of the EN12845 this system should be supplied with 3 Dry Pipe Valves.

• The SprinkFDT calculation saves the installation of 2 additional dry alarm valves, 2 shutoff valves and the feed connections to the different systems. Instead of 3 feed connections only 1.

Example Dry system: Conclusion and results

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systems. Instead of 3 feed connections only 1.

• Every system requires an Inspection Test Connection. This can be reduced from 3 to 1 one. Saves 2 test connections.

• Every system requires an air maintenance device. So you will save 2 devices.

• Total savings over €12.000,-.

• Save time required for inspection and testing.

• Save on maintenance due to less components.

Example Dry system: Conclusion and results

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Any Questions?

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Thank You