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T.A.B. Joint T.A.Q. joint installation procedures follow the normal bell and spigot operations of cleaning, adhesive mixing, etc. .as described previously. The threads on the bonding surfaces are designed to improve the reliability of the joint, particularly under adverse conditions. Two T.A.B. wrenches or strap wrenches (Ridgid No. 2-P) are recommended when joining T.A.B. pipe. Separate T.A.B. wrenches are available from the factory for each size pipe. The wrenches must be placed 6" to 12" (150 mm to 300 mm) from the joint to minimize ovaling and ensure proper make-up. CAUTION: Improper use of strap wrenohes oan oause point -loading Pin damage and/or bad joints tI- are looked up. To prevent damage to the pipe wall, wrap the strap wrenoh pipe around the pipe as shown. Strap'" • Cover all machined areas on the Handle A spigot and at least one-half inch beyond the last thread in the bell with the adhesive. • Screw the pipe together by hand, ensuring the joint is not cross threaded. Two inch (50 mm) diameter pipe can be hand tightened. To ensure complete joint make up for 3" and 4" (75 mm and 100 mm) diameter pipe, use T.A.B. wrenches. DO NOT OVER TIGHTEN. • Check lock up by moving free end of pipe in an up-and- down or side-to-side motion. The movement must be sufficient to move the joint being checked. No movement should be visible in the joint. If any movement exists. continue to tighten until no movement is visible. Connections into fittings are made using the non -nal bell and spigot methods. JOINT CURE Ambient Cure Cure time is the time required for the adhesive in the assembled joint to harden. Cure time depends on the type of adhesive and the ambient temperature, as shown in Table 7. TABLE 7. Adhesive Ambient Cure Time Adhesive Type Temperature Degrees F Degrees C Cure Time (Hours) 7000 110 43.3 2 90 32.2 3 80 26.7 5 70 21.1 8 60 15.6 18 55 12.8 24 8000 110 43.3 1 .,2 40 32.2 80 26.7 4 70 21.1 6 60 15.6 12 55 12.8 18 NOTE: Cure time is the time before the line can be tested. Times may vary depending on temperature, humidity, etc. Heat Assist Methods When working at temperatures below 55OF or in situations where rapid cure is necessary, NOV Fiber Glass Systems has developed heat assist methods for curing adhesive bonded pipe or fitting joints. A. Eleotrio Heating Collar • The most effective method of heat assist is electric heat collars. Reusable 110/120 volt heating collars are standard (220/240 volt heating collars are available on special order and are shipped without the male Plug). • The curing operation should occur as soon as possible after the bonding operation. In cold weather it is preferable to bond only the amount of pipe that can be cured during the same day. if a generator is used, assure the power supply is adequate for all of the units being used. Use 110/120 Volt A.C. only. When extension cords are used, make certain they can handle the total wattage of the collars used. Refer to Table 4 on page 3. • When temperatures fall below 320F (O°C), fiberglass insulation should be added to heating collars to achieve a proper cure. • Pipe or sub -assemblies can be moved before the joints are cured if care is taken and the joint is not disturbed. Avoid bending or excessive movement. • Refer to Bulletin F6640 for complete operating instructions. Do not bend or fold heating oollar; this may break the heating elements and oause inadequate heat to oure the joint. For Pipe and Fittings: Use the same size heating collar a the pipe size being installed, with the exception of flanges. Retract - protective mesh covering on 2" pipe prior to use of heating collars. Do not use a heating collar that is designed for a larger size pipe. With the uninsulated flap on the bottom (next to the fitting), carefully wrap the heating collar around the joint. Feed the strap through the square ring. CAUTION: The uninsulated flap is ,' extremely hot when the collar is on.� DO NOT TOUCH with bare hands. 'i Tighten the straps until the heating ry collar is snug against the joint. For Flanges: • For 3" and 4" flange joints, use a heating collar that is one pipe size smaller. Remove the straps from the heating collar. • Carefully tum the collar inside out with the heated area facing the I.D. of the pipe. Place the heating collar in the I.D. of the flange. 12