91-1715 - Laserfiche WebLink

Browse Search

.. ..- CHAPTER III PIPING REQUIREMENTS Fl,"1 , . . Pyro a.n Aurom8tic Restannt Systems pennit a v.n.ty of unbalanced piping configurations. PIping for the . PCL-1851275/550 systems.. inI8nded 10 be vetY simple and .~ ~~forwIIrd. There.. noftow dh._lieIIs".~ &.-d in 'the syst8m. NOTE The only ac:ceptabIe typeS of piping which can be used with 'the PCl-16512751550 is black pipe. chrome plated pipe, or stainless stee! pipe. Galvanized pipe cannot be used. The PCl-165/275/550 systemS have been cIlNeIoped using a system of flow points. Each system has a maximum of: I. PC1.-165 - 6 flow points II. PC1.-275 - 10 flow points. III. PC1.-550 - 20 flow points. Pyre Chem uses a flow point system to permit maximum flex- ibility in piping; Each nozzle has a flow point rating as follows: NL-D (Duct Nozzle) ............... 3 flow points NL-P (P1enumlOuct Nozzle) .., . . . . . .. 1 flow point NL-A (Apprl8nce/Plenum Nozzle) ...... 1 flow point NL-R (Radiant Charbroiler Nozzle) ..... 1 flow point NL-UB (Upright Broiler Nozzle) ....... Y.a flow point MAXIMUM NOZZLE USAGE ON SYSTEM ~NUMBER AppBcatfon '. \~:16~PCL-275 PCl.-550 Appliance ~ 10 20 Plenum 6 10 20 Plenum 6 5 18 Duct 6 10 ~18 NL-D Duct 2 3 6 NL-Ua Upright Broiler 6 pair 10 pair 16 pair NL-R Radiant Charbroiler 6 10 20 To further simplify piping. the Pyre Chem PCl-1651275/550 .-,atIIf1'1S do not restrict piping runs to specific Iengd1s and quan- tity of fittings. Instead. limits are placed on pipe lengths in termS of actual length of pipe and equivalent lengdt of fittings. All pipe fittings develop a pressure loss which can be equated to the losa through a specific length of straight pipe. This loss ~ the equivalent length of the fitting. The equivalent length of fitting is always added to the total pipe length to determine the equivalent length of the branch. Table 3-1 illustrates the equivalent of pipe fittings used in PCL-16512751550 systems. Table 3-1. Pipe Fitting Equivalent lMIgth in Feet Nozzle NL-A @ -, NL-P ~. s0- ls: TEE UNION OR PIP! SIZE ELBOW ELBOW 1.-_ SIIE OUTLET COUPUNGS 318 0.8 1_3 0.8 2.7 0.3 " 0.8 1.7 1.0 3.4 0.4 ~ 1.0 2.2 1.4 ....5 o.s Pyre Chern PCl-165/2751550 piping is bIaken down into a m8in supply 6ne and branch lines. Branch'" can further be defined as duct branch, plenum and ~ branch. c"-' A. ... .......Y LIE - L PCL-165 - The IMin supply Ine is me run of ,.. pipe . fram the c;yInder 10 the haDrd .... In ...... this will be a straight Ine run U8ing'" 10 ~.ICh" off 'the main.. li........ on main supply line piping far 'the PQ..-165 .. shown in Table 3-2- Table 3-2- PIping u.n;tations far PQ..-165 SECnON 11ft DIMl. MAX. VERT. RISE IIIiII $IlIIIIr LiIIe 3Ir 7 1r See Figure 3-1 for ac:ceptaOte configurations NOTE The muimum length of the main suppy line between the first branch tee and the last branch tee is 20 feet. 2. PC1.-275 - The main supply line is the run of 1/2. pipe from the cylinder to the hazard area. In general, this will be . snight line run using teeS to "branch" off the main. Umitations on main supply line pilJing for the PC1..-275 are shown in Tabte 3-3. . Tabte 3-3. Piping Umitations far PCl.-275 SECTION ... SIM LiIIe S - 10 7 12' "- See Figure 3-2 for acceptable ccnfigunItions NOTE The rnuinun length of the main supply line between the first branch Ute and the last branch tee is 20 feet.. 3. PC1..550 - The main supply line is the run of Y.z. and Ya. pipe from the cyIincIer to the hazard area which must supply a minimum of eleven (11) flow points with the PC1.-550 system_ The ~. cfJameter pipe section is used to supply from the cylinder to the first teA flow poims required_ The main supply is then reducad to ". diameter pipe and wiI supply from one to ten additional flow points as required 10 protect the needs of 'the hazard for . maximum of twen- ty flow points.. In general. this will be a straight line run us- ing _ to "branch" off the main. Limitations on main supp- ly line piping are shown in Table 3-4. The main supply line when used with the PeL-550 for b8I8nced split systems Will utif'lZe the y.. diameter pipe to supply from the cytinder to the tee which spats the system to each separate hazard am. The ~. diameter pipe is not permitted to have any branch lines in this application. The . pipe run extending from each side of the tee is reduced to Y.z. ciameter pipe from which each side will supply a max- inun of ten flow points. Each side must be balanced within one flow point and not more than a ~ 10 percent imbalance on piping run. LimitationS on main SUIJPIy line piping are shown in Table 3-5. NOTE The PC1.-550 is only to be utilized in acess of ten flow points. If the tataJ of flow points is below ten, a PC1.-275 or PC1.-165 system should be used.. 15 UL EX3830 ULC CJ:XS12 MN 1. 1988 . ._-~- ...------- --- -- -- ---.- .._- ..---- -- - .--- .~