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SECTION S ♦ Cutting & Apering ( There are several power tapering tools not manufac- tured by Smith Fiberglass Products that are available for use with Smith Fiberglass Products piping systems. It is the tool operator's responsibility to ensure that the tool being used is capable of reproducing a field- made taper that is within the tolerances of a factory- made tapered spigot. Refer to Smith Fiberglass Products' Bulletin No. F6600 for the correct procedures to verify matching tapered spigot tolerances (factory e . versus field-made). ®e Note: Protect pipe from vise damage by placing rub- ber sections or sleeves (180° sections of pipe cut from Operators should wear heavy cotton clothing, including the same size pipe being tapered) between the pipe and long-sleeve shirts,which protect the skin from the dust. the vise. When using a manual tool and pipe is Eye protection is required for the tool operator. clamped into a chain vise, extend pipe at least 12 inch- es (300 mm) beyond chain to prevent oval-shaping of 1.5.2 Tapering the pipe. ,� The matched taper concept employed by Smith Fiberglass Products is the key to excellent joint performance. A power tool(Model 2100)is available from Smith Fiberglass P� Products (see Fig. 1.5.2). It is preset at the factory and is capable of tapering 2"and 3" (50 mm and 75 mm)diame- Hing of the piping layout is essential. It will ter RED THREAD IIA pipe(it also scarfs 3"and 4" (75 mm icing the system easier and can reduce the quan- and 100 mm) diameter RED THREAD IIA secondary con- s of material required. tainment pipe; see Part Two of this manual. Refer to Smith Fiberglass Products'Bulletin No. F6625 for tool op- 1. Using the shortest practical route, run the pipe in a erating instructions. Use a heavy duty, industrial 12- single trench from the tanks to the vent risers. gauge extension cord with the Model 2100 tool. 2. Pipe should run parallel to the tanks and dispensers. If the power tool is not available,a manual tapering tool kit from Smith Fiberglass Products may be used(see Fig. 1.5.2). 3. Avoid piping across the tanks. The tapering tools will reproduce a field-made taper to a± 1.6.2 Trenching and Backfilling V (3 mm)tolerance when compared to a factory-made ta- pered spigot. The angle for properly made field tapers for Proper construction of trenches is important. They should 2"-4" (50 mm-100 mm)diameter pipe should be 1%de- be wide and deep enough to accommodate the piping and grees. NOTE: If the tapering tool has an old-style blade backfill material. See Table 1.6.1 for recommended mini- holder, it must be replaced. The correct taper angle is 1% mum burial depths. degrees for 2", 3", and 4"pipe sizes. TABLE 1.6.1 Recommended Minimum Burial Depths Based on Soil Modulus of 1,000 psi or Higher (Refer to ASTM D3839 or AWWA C950 for Method/Theory) Min.Amount of Sand Minimum or Pea Gravel Above Pipe Size Burial Depth the Top of the Pipe (in.) (tt Surface Condition (in.) rt): (in.) (ntrn) 2 Unpaved 17 . - 12 305 Paved, min.4"(100 mm)asphalt 12 8 3 Paved, min. 4"(100 mm)concrete 9 ;° 5 1`27 3 75 Unpaved 20 $08 14 356 Paved, min.4"(100 mm)asphalt 13 334 9 29. Paved, min.4"(100 mm)concrete 11 279 7 178 4 100 Unpaved 20 S(?$ 14 Paved, min.4" (100 mm)asphalt14 356 10 Paved, min.4" (100 mm)concrete 11 279 7 179 8 Installation Instructions