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C U SECTION 8 * Testleg Recommendations r r FIGURE 2.7.2 wrapping a heating collar over the saddle outlet as shown in Fig. 2.7.2. For outdoor installations, place wind shields on both sides of the saddle to prevent heat loss. Total cure time must be two hours for saddles. Allow the saddle to cure and cool down to ambient tem- perature before bonding or threading in the side run. Do not use chemical heat packs to cure saddles. � r• �" t piping, 3" and 4" (75 mm and 100 Vis, can be pressure tested by installing an h a pressure gauge and a nipple in the %" outlet of a termination fitting (see Fig. 2.8.1). If est piping is to be installed temporarily, use care not to over tighten when installing the steel pipe threads. Fiberglass threads may be damaged when removing the steel threads if over tightened. Use soft -set, non-metallic thread dope only. Flexible FIGURE 2.8.1 Smith Fiberglass Products recommends testing 3" and 4" (75 mm and 100 mm) secondary containment pip- ing systems with air at pressures not to exceed 10 psig (0.069 MPa). The most convenient place to introduce air for the containment piping pressure test is at the threaded outlet located on the termination fitting near the underground storage tank (see Fig. 2.8.1). It is ad- vantageous to leave the system pressurized until the installation is completed in order to monitor for possi- ble damage to the containment piping system during additional construction. The low pressure and low vol- ume of the secondary containment piping system makes this air test a safe procedure if normal safety precautions are followed. Refer to air test safety pre- cautions in Section 1.7.3. Note: 6" (150 mm) secondary containment piping is not UL Listed, but may be air tested when normal safety pre- cautions are followed. M