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SE ION 4 ♦ Joining Methods <br /> 6. To achieve the most reliable piping system, it is essen- Fittings are manufactured to accept either a tapered spigot <br /> tial that the installation crew be familiar with the or T.A.B. spigot end of the pipe. Tapers can be made in <br /> joining techniques described in this manual. Note the field with tools specially designed for this purpose(see <br /> especially Section 6. Section 5). Bells cannot be field-made. When a belled <br /> end is needed,use a bell x bell coupling. <br /> 7. Proper and safe methods of testing are recommended ��, <br /> to assure that the bonded joints in the piping system RING <br /> have been properly bonded and cured. See Sections 6Or <br /> and 7. <br /> 1.4.2 Bell and Spigot Joining Method , Fiberglass Products pipe, use one of the fol- <br /> The adhesive bonded,tapered bell and spigot joint is the ���h " <br /> primary joining method for 2"-4" (50 mm-100 mm)pipe- 1. Fine tooth(32 teeth/inch) hack saw, <br /> to-fittings (see Fig. 1.4.1). <br /> 2. Circular saw with abrasive cutting blade (carbide grit or <br /> masonry blade), <br /> Bell x Spigot Joint <br /> 3. Sabre saw with afine-tooth metal or carbide grit blade, <br /> 4. Jigsaw with carbide grit abrasive blade, or <br /> 5. Chop saw (see Fig. 1.5.1) <br /> Spigot 7 <br /> Cutting Tools <br /> Bell <br /> FIGURE 1.4.1 <br /> The T.A.B. (threaded and bonded) joint is the primary <br /> joining method for pipe-to-couplings (see Fig. 1.4.2). The <br /> mechanical locking action-when combined with the ad- scribe Line <br /> hesive-promotes positive make-up of the joint and pre- 32 Teeth <br /> vents backout during adhesive curing. Per Inch <br /> Blade <br /> 1 <br /> T.A.B.Joint Abrasive C <br /> Blade <br /> ® Sleeve Coupling <br /> FIGURE 1.5.1 <br /> Note: Cutting operations for fiberglass pipe can <br /> i generate dust or cutting chips that are irritating to <br /> FIGURE 1.4.2 the skin, upper respiratory tract, and eyes. Because <br /> these materials are irritating, good ventilation for the in- <br /> stallation crew should be used to prevent exposure. <br /> Pipe is supplied with TAB. spigot x T.A.B. spigot ends. <br /> Three sleeve couplings are supplied per 100 feet of pipe. A nuisance dust breathing filter should be used when <br /> working in areas where wind and dust are present. <br /> RED THREAD 11A Pipe ST Fittings — 7 <br />