12987539 - Laserfiche WebLink

Home Browse Search

TFP37O Page 4 of 12 LWhere gasketed grooved type a 25 sprinkler minimum design area,5 the hydraulically remote area, more couplings are being utilized,the gasket sprinklers on 5 branchlines are to be water pressure will likely be available ` I type must be capable of closing off calculated. For a 30 sprinkler design to these sprinklers than to sprinklers the gap between the pipe ends, e.g., area,5 sprinklers on 6 branchlines are within the hydraulically remote area. GRINNELL Tri-Seal Gaskets.A petro- to be calculated. If less than 5 sprin- NFPA 13 states,when fluid delivery Is leum-free silicone lubricant is to be klers are on a branchline,all sprinklers based on four(4) sprinklers, the test utilized on grooved coupling gaskets. on the appropriate branchlines are to shall simulate two sprinklers on each of When standard gaskets are employed, be calculated up to the required total. two branchlines.The Annex goes on to sta small annular "groove" is left- The SprinkFDT-Q Fluid Delivery the twe o remote thete brasprnchliersnes. shall. be from between the ends of the two pipes Calculation Program must be used the two branchlines. to be coupled. This annular gap can to assure water delivery within the Fluid Delivery(Operating)Time fill with water any time the system is prescribed maximum and minimum Safety Factor flooded,such as during hydrostatic or times,as well as to take pump start up There are three (3) options available water delivery time testing.It is virtually time into consideration.When running when performing the Fluid Delivery/ impossible to remove this water,which fluid delivery calculations, the calcu- Maximum Operating Time calculations. will then freeze when the freezer is lotions must include the path back to The option chosen will determine the placed into operation.The expansion the point of connection with the water required operating time safety factor. of the water as it freezes can damage supply source. This assures that the the gasket,and In severe cases even impact of inertia will be considered Option 1: Four (4) Sprinkler Test damage the coupling or even lead to within the underground supply piping. Manifold - When a 4-sprinkler test joint failure. manifold is piped from the remote 2 When establishing the differential trip branchlines in accordance with NFPA Where GRINNELL grooved type ratio on the SprinkFDT-Q, set the trip 13, the following procedure shall be couplings are being utilized,the Figure value to zero(0)in the device parameter utilized.Perform the 4-sprinkler calcu- 577 Rigid couplings must be utilized box,then select ENTER. lotions on the overhead system with no throughout the overhead system with Note:When running the SprinkFDT-Q specific "cushion" or "safety factor" the exception of flexible joints where calculations,a warning dialog box will required(All piping to test header must required by NFPA for strain relief. In appear stating "The dry pipe valve is be included/modeled in all calcula- this case,GRINNELL Figure 705 flexible set to deluge conditions". Select YES tiros).Atter confirming that the calcu- type couplings must be utilized. to continue. lated overhead sprinklers do not (10)Control Valves Also, when applying the fluid delivery exceed the maximum allowed operating The Main Control Valve(preaction and calculation program, the fixed trip time, run an additional calculation for L dry)and System Shut-Off Valve (pre- time to be entered for the Model QRS the 4-sprinkler test manifold by closing action only)must be supervised in the Electronic Accelerator is 4 seconds. the previous four(4)overhead normally open position. The use of In order to accuratelyredict water sprin- klers and opening the four (4) test Model BFV-N or Model JPL Butterfly p manifoldes sprour sprinklers The rs notisu time dalterrs time, the use of an accurate to these four n note oft he Valves are recommended.The BFV-N water supply curve isi critical for the overhead ee simnkl r (i.e.ma time rethe Valves are described in TFP15W, Progra DT-Q Fluid Delivery Calculation tha30 seconds). eresubet water TFP15/5,and TFP1520. Program. than 30 seconds).The resultant water (11)Red-E Cabinet Simulated Open Sprinklers for Fluid delivery time to these four sprinklers as The DV-5 Preaction Red-E Cabinet Delivery Calculations shown in the calculated results must (without air compressor)that can house In accordance with Tables A, B, or C, not be exceeded during the field test. Items 2 thru 6 is recommended. This both the maximum and the minimum Option 2:One(1)Sprinkler Inspectors component is described in TFP1400. water delivery time must be calculated. Test-When a single sprinkler inspec- The required number of sprinklers to tors test is installed, the following Design simulate "open" for determining fluid procedure shall be utilized. Perform delivery time is four(4).TFPP recom- the 4-sprinkler calculations on the Criteria mends that the four (4) sprinklers overhead system with a 5% "safety utilized, consist of the two (2)remote factor" required (All piping to test TYCO QUELL Preaction and Dry sprinklers each on the two(2)remote header must be included/modeled in all Systems are an Innovative approach branchlines within the hydraulic remote calculations).After confirming that the to addressing a high-challenge fire area.The sequence of operation of the calculated overhead sprinklers do not hazard that departs from previous four (4) sprinklers should be based exceed the maximum allowed operating control mode and suppression mode on the linear length of pipe from time with a 5% safety factor, run an approaches and instead employs a the sprinkler to the source. For the additional calculation for the 1-sprinkler sprinkler operational area sufficient to maximum delivery time calculations, test manifold by closing the previous surround and drown the fire. the first sprinkler operation is based four (4) overhead sprinklers and Except as modified below, all instal- on the longest linear length from the opening the single sprinkler inspec- source. For the minimum delivery time tors test connection. The resulting lation criteria provided in NFPA 13 calculation,the first sprinkler operation time to this single sprinkler inspec- applies. is based on the shortest linear length tors test connection is not subject to. Hydraulic Design and from the source, the maximum operating time of the Water Delivery Under certain system piping configure- overhead sprinklers he.may be greater The hydraulic design,maximum water tions,a group of four sprinklers other than 30 seconds).The resultant water . delivery time, and minimum water than the 4 sprinklers described above, delivery time to this single sprinkler [ delivery time must be in accordance can result in a longer delivery time. If inspectors test "sprinkler" as shown 4 with Table A,B,or C,as applicable.For this group of sprinklers is not within in the calculated results must not be exceeded during the field test.