COMPLIANCE INFO_2004-2005 - Laserfiche WebLink

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Primary Piping System Installation , ltd! q L'Y 4"(75 mm and 100 mm)diameter pipe,or on fittings, pushing and turning to lock the joint is impractical,and A ell and Spigot Joint—THE SPIGOT MUST BE driving force must be used. ALIGNED AND LOCKED IN THE BELL. A cocked or mis- aligned joint will result in false lock-up and possible joint If the adhesive or the pipe surfaces are cool,push and failure either during testing or at a later date. hold for a few seconds to allow time for the adhesive to start flowing out of the tapered joint. If additional 1. When the temperature is below 60°F(15.6°C),prewarm force is needed,a rub- the bonding surfaces(after the joint has been cleaned ber mallet or a strong and the cleaner has evaporated). CAUTION: piece of wood, or a Evaporation may be slow at extremely low temperatures. dead blow hammer to Use a hot air blower and apply heat uniformly to the bell drive the pipe together and spigot until warm(not hot)to the touch. Check tem- is the preferred -wooa perature by touchinglim method. outside of the bell and inside of the spigot to When the adhesive starts squeezing out of the joint, avoid contact with dean use stronger blows. Proper pipe alignment is impor- bonding surfaces. If hot tant. Maintain back pressure against previously as- to the touch,let cool be- sembled joints to avoid shaking them loose. After the fore applying adhesive, joint has started to make up,hit until no further en- If an electric heating col- gagement can be seen at the joint. When engage- lar is used to prewarm, ment stops,the joint is locked. Always check previous place the joint together bonded joints to ensuree they have not backed out. dry,then heat the O.D. of the bell to avoid con- NOTE: Do not use this method where the spigot end laminating the spigot. would be hit. Use come-alongs in this case. On 2"-4" (50 mm-100 mm)diameter pipe,a three-pound(4 kg) 2. Brush adhesive on both shop hammer is adequate. surfaces,applying a thin uniform coating. To mini- 4. Check lock up by moving free end of pipe in an up- mize contamination,apply and-down or side-to-side motion. The movement adhesive to the bell first. must be sufficient to move the joint being checked. Adhesive should always No movement should be visible in the joint. If any be worked into the ma- movement exists,the joint is not locked up,and the chined surface by ap- joint assembly procedure must be repeated. plying pressure during application. This will B. T.A.B.joint—T.A.B.joint installation procedures follow the .,wet out"the machined normal bell and spigot operations of cleaning,adhesive surface and maintain the mixing,etc.,as described previously. The threads on the required thin bond line. Be sure bonding surfaces are designed to improve the reliability of that adhesive is deep down into the bell past the inser- the joint, particularly under ad- tion depth and that all machined taper surfaces on the verse conditions. Two spigot and the cut and of the pipe are uniformly cov- T.A.B.wrenches or strap ered. Excess adhesive will make the joint more wrenches are recom- difficult to lock and can result in a flow restriction. mended when joining Wet out the machined surfaces with a thin layer of ad- T.A.B. pipe. Separate hesive to produce a good bond. T.A.B. wrenches are available from Smith Connections into fittings are made using the normal bell Fibercast for each size and spigot method. A threaded(T.A.B.)spigot can be pipe. The wrenches lock bonded into a smooth bell(fitting),ora smooth spigot can around the pipe and force be bonded into a threaded(T.A.B.)bell. the pipe into a very slight oval shape. Therefore,the wrenches must be placed 6"to 12"(150 mm to 300 mm) 3. Align and lock the joint. away from the joint to assure good joint make-up. For 2"(50 mm)pipe,insert spigot into the bell until sur- NOTE: If T.A.B.wrenches are not available,strap wrenches, faces touch,then push and such as Ridgid(l)No.2-P,can be used. To prevent dam- turn at the same time until age to the pipe wall,wrap the strap wrench around the a lock is achieved. Only a pipe as shown. quarter tum to a half tum is usually needed. On 3"and tn)Ridgid is a registered trademark of the Ridge Tool Company 9 Installation Instructions