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SECTIONS ♦ Secondary Containment System Size Reductions TABLE 2.4.1 Termination Fitting Connections Termination(1) Fitting Size Large End Fits: Small End Fits: 3" x 2" 3" Pipe 2" male threaded adapter(2) 75 x 50 mm 75 mm Pipe 50 mm male threaded adapter(2) 4" x 3" 4" Pipe 3" male threaded adapter(?) 100 x 75 mm 100 mm Pipe 75 mm male threaded adapter(2) 6" x 4" 6" Pipe 4" male threaded adapter 150 x 100 mm 150 mm Pipe 100 mm male threaded adapter 2.4.3 Termination Fittings (See Table 2.4.1) Note: All other secondary containment fittings are manu- factured to fit the O.D. of containment piping. When terminating from 4" (100 mm) secondary contain- ment pipe to 2" (50 mm) product pipe, the following fit- tings are required: 1. 4" x 3" (100 mm x 75 mm) termination fitting with or without tap 2. 3" x 2" (75 mm x 50 mm) secondary containment re- ducer bushing(3) 3. 2" (50 mm) bell x male threaded adapter for secondary containment (machined or sanded) See Fig. 2.4.4. 4 x 3 Termination Fitting 4" Secondary Containment Pipe 2" Bell x Male Threaded 2" Product Pipe Adapter 3 x 2 Secondary Containment Reducer Bushing FIGURE 2.4.4 (1) The 6" x 4" (150 mm x loo mm) termination fitting is not UL Listed. (2) A special coupling with controlled O.D. may be obtained for use with threaded fittings. (3) 3" x 2" (75 mm x 50 mm) secondary containment reducer bushing is not UL Listed. SECTION S • SECONDARY CONTAIN- MENT SYSTEM SIZE REDUCTIONS line secondary containment pipe ize reductions are made using a tele- scoping concentric reducer. Reductions can be made from 5" to 4" (125 mm to 100 mm) and 4" to 3" (100 mm to 75 mm). both ends of the telescoping concentric reducer are bonded to a scarfed or sanded end of pipe. SECTION 6 • SECONDARY CONTAIN- MENT SADDLES For secondary containment piping installations requiring intermediate access stations for visual or electronic leak detection, several sizes of reducing saddles are available. See Bulletin No. B2 ISO for saddle sizes and descriptions (see Fig. 2.6.1). Containment saddles must be installed prior to bonding and testing the product piping. Use DS -7000 series adhesive or DS -8000 series adhesive when bonding saddles to the pipe. Threaded connections must be made with a flexible connector such as flexible hose to eliminate bending stress. Tighten threads as if they were brass or other soft material. Procedure for installing secondary containment saddles: Refer to Fig. 2.6.2. 1. Locate saddle on pipe and mark around saddle base. 2. Use a file or rough sandpaper (40 grit or less) to re- move all surface gloss from the pipe O.D. where the saddle is to be bonded. Use circular or random pattern during sanding to eliminate grooves on the pipe sur- face. 3. After sanding, locate saddle on pipe and mark hole to be cut in pipe. Using a pilot drill and a fine-tooth cir- cular hole saw, cut a hole of the same size as the outlet of the saddle. Do not force the cutter, or it will unduly fray the edges of the hole. 4. All bonding surfaces must be free of contamination. See Section 7, Para. 2.7.2. S. Apply a heavy coat of adhesive to the O.D. of the pipe, I.D. of the saddle, and the edges of the pipe wall ex- posed by the hole. C 6. Place the saddle over the hole and clamp with two - hose clamps. Using a large screw driver, hand tighten the clamps alternately until secure and adhesive 26 Installation Instructions •