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The flow capacity of a piping product is dependent upon several factors including internal diameter (I.D.) and Hazen -Williams flow factor. The flow factors for FRP and thermoplastic pipes are virtually the same except corrugated systems tend to have slightly greater pressure losses. As a rule of thumb, you can compute the internal area of the piping system to compare the flow capacity of different products. The following chart shows the internal area of different sized products on the market. Product Internal area 1.5" FLX 11 (1.5" I.D.) 1.77 int 2.0" Flex pipe (2.0a I.D. 3.14 int 2" Dualoy 3000/L (2.21" I.D.) 3.84 int 3" Dualoy 3000/L (3.32" I.D.) 8.66 int Based on the above chart, the following comparisons can be made: 1.211 FRP has 117% greater flow capacity than 1.511 flexible pipe (3.84 int vs. 1.77 in') 2. 2" FRP has 18% greater flow capacity than 2.0" flexible pipe (3.84 int vs. 3.14 in 2). 3. 3t1 FRP has 176% and 389% greater flow capacity than 2" and 1.5" flexible pipe, respectively. 4. 3" FRP has 126% greater flow capacity than 2" FRP (8.66 int vs. 3.84 in). Hazen -Williams Pressure Loss Curves for different diameters of Ameron products, like the picture below, are available upon request The chart is based on water, but can be converted. to gasoline by multi- plying the pressure drop by 0.82. Looking at an example on the chart, 50 gpm gasoline flowing through 1,511 hose (83 psix 0.82) would lose 68 psi pressure over 1,000 feet. This would equate to 6.8 psi per 100 feet. One thousand feet of 2" Dualoy 3000/L with 50 gpm gasoline flowing through it(12 psi x 0.82) would lose 10 psi or 1 psi per 100 feet, i.e. 85 % less pressure loss. Given the same flow rate (50 gpm), you can also see that the flow velocity between the two sizes of piping is vastly different. For the Flow Rimes 1.5" hose, 50 gpm must travel at about 8.5 ftJsec. (turbulent flow) and the 2" Dualoy 3000/L flow would be less than 4 ftJsec. H&ga yfjwmm Pressure Loss �saul m 2: fl" shows 2500 gallons Pa rnlnirta DmS from the Inter- aec6on of the 12 Inch nomliIaf pip. alze gree, It"."' he prenure lose h shown as 41 pal per 100o feet. To the right. folbwing Na slope of the weer velocity Ones, 1M velodty is Indicated as 6.75 to* per second. The pramrs loaf ter the entire One Is determined by multiptying 1M pres- sure lose per 100 feet dmes the length of the line, divided by 1000 feet. R ee Loy—PO. M P. sfun MN/j-w ' T,K >P_ no N11..", MI Ion KL 411bnla 14"12- paa.tra rii'-"— QV O t2 MUM1,114 The Manning equadan was empufcalfy developed for pipes of all shapes. fug or partldy ful comisying water or sewerage. it Is used In most ODOR channel flow caleulegons. twae>r r • • 1,••• vredn f1eM frw..eabl s - "Y* -N ares 1feM ear r..o (laminar flow). Certain fuel products such as diesel fuel, should not be pumped at excessive flow rates because foaming will occur, causing problems in the lines. As a further example, it would not be possible to substitute 1.5" or even 2" flexible hose for 3" FRP in a nigh volume operation such as a `ruck stop. The hose could not iupply the same volume of product :o the same number of dispensers. kt best, individual lines would have :o be run to each dispenser which vould increase cost drastically and till have reduced flow at the lispenser. For more information, contact Reid Van Cleave In the Houston office. Reference materiaL- PipingFlowRate Design forRetm7 Reftre181gFacMe5 by Sullivan D. Curran, Fiberglass 'Ink & Pipe Institute. 0