COMPLIANCE INFO_2006-2012 - Laserfiche WebLink

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Primary Piping System Installation JOINT ASSEMBLY Bell and Spigot Joint THE SPIGOT MUST BE ALIGNED AND LOCKED IN If the adhesive or the pipe surfaces THE BELL. A cocked or misaligned joint will result in false are cool, push and hold for a few lock up and possible joint failure either during testing or at a secondsto allow time for the adhesive later date. to start flowing out of the tapered joint. If additional force is needed, ~Nood • When the temperature is below 65°F (18.3°C), prewarm a rubber mallet or a strong piece of the bonding surfaces(after the joint has been cleaned and wood, or a dead blow hammer the cleaner has evaporated). CAUTION: Evaporation to drive the pipe together is the preferred method. may be slow at extremely low temepratures. Use a hot air blower and apply heat uniformly to the bell and spigot When the adhesive starts squeezing out of the joint,use until warm(not hot)to the touch. Check temperature by stronger blows. Proper pipe alignment is important. Maintain touching outside of the bell and inside of the spigot back pressure against previously assembled joints to avoid to avoid contact with clean shaking them loose. After the joint has started to make up, bondingsurfaces. If�� '� hit until no further engagement can be seen at the joint. �; � tiJ hot to the touch, let cool lh When engagement stops, the joint is locked.Always check before applying adhesive. i previous bonded joints to ensure they have not backed out. If an electric heating collar 3 5 is used to prewarm, place ''° NOTE: Do not use this method where the spigot end would the joint together dry, be hit. Use come-alongs in this case. On 2"4'(50 mm-100 then heat the O.D. of the mm) diameter pipe, a three-pound (4 kg) shop hammer is bell to avoid contaminating adequate. the spigot. • Check lock up by moving free end of pipe in an up- Brush adhesive on both surfaces, and-down or side-to-side motion. The movement must applying a thin uniform coating. be sufficient to move the joint being checked. No To minimize contamination, apply movement should be visible in the joint. If any adhesive to the bell first. Adhesive movement exists, the joint is not locked up, and the should always be worked into joint assembly procedure must be repeated. the machined surface by applying pressure during application. This will"wet out"the machined surface and maintain the required thin bond line. Be sure that the adhesive is deep down into the bell past the insertion depth and that all machined taper surfaces on the spigot and the cut end of the pipe are uniformly covered. Excess adhesive will make the joint more difficult to lock and can result in a flow restriction. Wet out the machined surfaces with a thin layer of adhesive to produce a good bond. Connections into fittings are made using the normal bell and spigot method. A threaded (T.A.B.) spigot can be bonded into a smooth bell(fitting),or a smooth spigot can be bonded into a threaded (T.A.B.) bell. • Align and lock the joint. For 2" (50 mm) fittings, insert spigot into the bell until surfaces touch, then push and turn at the same time until a lock is achieved. Only a quarter turn to a half turn is usually needed. On 3 and 4"(75 and 100 mm) diameter fittings, pushing and turning to lock the joint is impractical. Driving force must be used. 8