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SECTION 4 ♦ Joining Methods 6. To achieve the most reliable piping system, it is essen- Fittings are manufactured to accept either the tapered tial that the installation crew be familiar with the spigot or T.A.B. spigot end of the pipe. Tapers can be joining techniques described in this manual. Note made in the field with tools specially designed for this especially Section 6. purpose (see Section 5). Bells cannot be field -made. When a belled end is needed, use a bell x bell coupling. 7. Proper and safe methods of testing are recommended to assure that the bonded joints in the piping system Note: For pipe that is bundled in 15 -ft (5 m) lengths, each have been properly bonded and cured. See Sections 6 bundle will have an equal number of spigot x spigot and and 7. bell x spigot pipe lengths. 1.4.2 Bell and Spigot Joining Method SECTION S • CUTTING AND TAPERING The adhesive bonded, tapered bell and spigot joint is the primary joining method for 2"-4" (50 mm -100 mm) pipe - to -fittings (see Fig. 1.4.1). Bell x Spigot joint DA��f fir 1014 IN ��40, ©C��10 cl . � The T.A.B. (threaded and bonded) joint is the primary joining method for pipe -to -couplings (see Fig. 1.4.2). The mechanical locking action -when combined with the ad- hesive -promotes positive make-up of the joint and pre- vents backout during adhesive curing. T.A.B. joint FIGURE 1.4.2 1.5.1 Cutting To cut Smith Fiberglass Products pipe, use one of the fol- lowing: I. Fine tooth (32 teeth/inch) hack saw, or 2. Circular saw with a crushed tungsten carbide or rein- forced abrasive blade, or 3. Sabre saw with a fine-tooth metal or tungsten carbide grit blade, or 4. Jigsaw with carbide grit abrasive blade (see Fig. 1.5. 1) Ahrasi Blade FIGURE 1.5.1 Note: Cutting operations for fiberglass pipe can JL generate dust or cutting chips that are irritating to the skin, upper respiratory tract, and eyes. Because these materials are irritating, good ventilation for the in- stallation crew should be used to prevent exposure. Pipe is supplied with one end tapered (the spigot) and the other end belled (the integral bell or factory -bonded cou- A nuisance dust breathing filter should be used when • pling) to accept a tapered spigot. working in areas where wind and dust are present. Operators should wear heavy cotton clothing, including RED THREAD /IA Pipe & Fittings 7