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1 and reducer bushings (NPT) (See tested immediately thereafter. Re- mum allowable torque is indicated Figure 1.6.23) fer to Bulletin No. D4510 for in- on each flange. Before making up threaded con- nections, inspect the threads. Do not use fittings with damaged threads. Inspect all steel threads and remove any burrs. Threads must be clean and dry before ap- plying thread lubricant. When using threaded adapters, thread them into the other system before bonding onto Smith Fiber- glass Products pipe. Otherwise, unless a union is used, it may be impossible to turn the adapter into the mating thread. Best results will be obtained using a strap wrench and a solvent -free, soft -set, non- metallic thread lubricant. The thread lubricant must be chemi- cally resistant (compatible) with the petroleum or alcohol product conveyed in the piping system. Do not use thread sealing tapes. For best results, apply thread lubricant to both the male and female threads. Smith Fiberglass offers Hi ProTM Thread Sealant. Hi Pro sealant makes installation of fiberglass threaded fittings easier and reduces the possibility of joint leaks. Con- nections assembled using Hi Pro sealant require only a "firm" hand tightening and may be pressure Figure 1.6.24 stallatlon Instructions for HI Pro Smith Fiberglass Products flanges thread sealant. meet ANSI B16.5 Class 150 bolt Tighten threads 1 to 1 1/2 turns holestandards. Full-facegasketing past hand -tight to ensure a proper materials, 1/8 -inch (3mm) thick, seal. with a Shore A hardness of 60 to 70 durometer, are recommended for CAUTION: Do not overtighten. Smith Fiberglass Products flanges. Tighten the adapters as if they Gaskets made from Teflon and PVC were brass or other soft material. usually have high durometer rat- ings and are not acceptable. NOTE: When using threaded re- ducer bushings, the bushing should be BONDED AND CURED before the male thread is screwed into the bushing. You can use DS -8000 series adhe- sives instead of thread lubricant on threaded adapters. Be certain to tighten as with standard thread lubricant. 2. Flanges (See Figure 1.6.24) Before bonding the flange onto the pipe, make sure the bolt holes line up with the mating bolt holes on the other system. Do not bolt flange before bonding unless in- sertion depth of spigot is previ- ously checked to be certain that the spigot does not bottom out or extend through the flange. The use of flat washers on all nuts and bolts is required. The maxi - Typical Pump Installations RED THREADIIA THREAD ED ADAPTER �_ FLEXIBLE CONNECTION Figure 1.6.25 Connecting to flat -face flanges - Smith Fiberglass Products flanges must be joined to flat -face flanges. The recommended maximum torque is listed on the flange label. 1.6.7 Flexible hose connections Flexible hose connectors are preferred when connecting the product piping lines and vapor recovery lines to the underground storage tank and dis- penser (See Figure 1.6.25). Use of flexible connectors at each location facilitates ease of installation and can also prevent breaking of the lines or fittings where settling might cause excessive movement. However, due to the inherently flexible characteris- tics of fiberglass pipe from Smith Fi- berglass Products, flexible connec- tors may not be required when con- necting to tanks. API publication 1615 states: "FRP piping, which is inherently flexible, can be used to create its own flexible joint if at least 4 feet (1.2m) of straight run is pro- vided between any directional changes of more than 30 degrees." This statement can be misleading. Theflexibilityof FRP piping discussed in API 1615 is related to the bending properties. The straight run of pipe must be located in an area that will allow the pipe to bend over a 4 ft. length. The bending of this "4 ft. straight run" will prevent shear loads in the pipeline and not exceed the