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Primary Piping System Installation T.A.B. Joint JOINT CURE T.A.B. joint installation pro- cedures follow the normal bell Ambient Cure and spigot operations of cleaning, Cure time is the time required for the adhesive in the adhesive mixing, etc. as described assembled joint to harden. Cure time depends on the type previously. The threads on the of adhesive and the ambient temperature,as shown in Table bonding surfaces are designed to 7. improve the reliability of the joint, particularly under adverse conditions. Two T.A.B.wrenches TABLE 7. Adhesive Ambient Cure Time or strap wrenches are recommended when joining T.A.B. Temperature pipe. Separate T.A.B. wrenches are available from FGS Adhesive Cure Time Smith Fibercast for each size pipe. The wrenches lock Type Degrees F Degrees C (Hours) around the pipe and force the pipe into a very slight oval ®110 43.3 2 shape. Therefore, the wrenches must be placed 6" to 12" 90 32.2 3 (150 mm to 300 mm)away from the joint to assure good joint 80 26.7 5 make up. 7000 70 21.1 8 NOTE: If T.A.B.wrenches are not available, strap wrenches 60 15.6 18 such as Ridgid No. 2-P, can be used. To prevent damage 55 12.8 24 to the pipe wall, wrap the strap wrench around the pipe as 110 43.3 1 shown. 90 32.2 2 80 26.7 4 CAUTION: Improper use of pin 8000 70 21.1 6 strap wrenches can cause a point-loading damage and/or 1 60 15.6 12 bad joints that are locked up. pipe \ L 55 12.8 18 In order to gain experience in determining Xtra NOTE: Cure time is the time before the line can be tested.Times may vary depending the proper amount of torque to use, the p \ on temperature,humidity,etc. following procedure is recommended Handle for the first few joints. DO NOT OVER Heat Assist Methods TIGHTEN. When working attemperatures below 55°F or in situations where rapid cure is necessary, Fiber Glass Systems has • Cover all machined areas on the spigot and at least developed heat assist methods for curing adhesive bonded one-half inch beyond the last thread in the bell with the pipe or fitting joints. adhesive. • Screw the pipe together by hand, ensuring that the joint A. Electric Heating Collar - is not cross threaded. Two inch (50 mm)diameter pipe The most effective method can be hand tightened. To ensure complete joint make of heat assist is electric up for 3"and 4"(75 mm and 100mm)diameter pipe, use heating collars. Reusable T.A.B.wrenches. heating collars are energized • Check lock up by moving free end of pipe in an up- by a 100/120 volt power and-down or side-to-side motion. The movement must source. NOTE:220/240 volt heating collars are available be sufficient to move the joint being checked. No on special order and are shipped without the male movement should be visible in the joint. If any movement plug• exists, continue to tighten until no movement is visible. Curing Operation - It is desirable, but not necessary, for the curing operation to immediately follow the bonding Connections into fittings are made using the normal bell and operation. However, in cold weather it is preferable to spigot methods. bond only the amount of pipe that can be cured during the same day. If 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 4. • When temperatures fall below 32°F (0°C), fiberglass insulation should be added to heat collars to achieve a proper cure. 9