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with solvent to complete the clean Do not use chemical heat packs to Be sure the kit is thoroughly <br />up. Use only enough solvent to cure saddles. mixed with the water and there <br />wet out the paper towels, and never <br />pour the solvent into the joint. <br />To hold the heating collar in place, <br />make a "flange clamp" by cutting a <br />section of the same size pipe and <br />then removing a 90 degree section <br />of the wall. Also, adding slits <br />(axial cuts) in this clamp will make <br />itmoreflexible. The heating collar <br />can be wrapped around the flange <br />clamp with the heating surface <br />facing outward. The clamp can <br />then be inserted to cover the <br />bonded joint (See Figure 1.6.21). <br />(Note: If it is difficult to compress <br />the flange clamp, use hose clamps <br />to hold the flange clamp during <br />insertion.) DO NOT INSERT the <br />clamp/collar more than halfway <br />into thejointoritwill bedifficultto <br />remove. Clamp length must be <br />longer than the width of the heat- <br />ing collar to aid in removal. <br />4. Curing with Smith Heat Packs <br />(chemical heat packs) <br />Chemical heat packs which cure <br />joints in approximately one hour <br />are also available (See Figure <br />1.6.22). Complete instructions for <br />these heat packs are included with <br />each kit (Bulletin No. 4500). Ob- <br />serve all safety precautions listed <br />on the instruction sheets which <br />accompany the heat packs. Note: <br />The overall effectiveness of chemi- <br />cal heat packs depends on ambi- <br />ent temperature. When ambient <br />temperature falls below 32°F (0° <br />C) (either air temperature or wind <br />chill), Smith Fiberglass Products <br />recommends that an insulation <br />blanket be used to sustain proper <br />curing temperature. Insulation is <br />available from Smith Fiberglass <br />Products. <br />To dispose of expired or damaged <br />chemical heat packs, follow this <br />procedure carefully: <br />a. Wear eye protection and gloves. <br />b. In a well -ventilated area, thor- <br />oughly mix the two dry chemi- <br />cals in the kit bag or other dry <br />container. Mix only one kit at <br />a time. <br />c. Use a metal bucket for disposal. <br />DO NOT USE A PLASTIC CON- <br />TAINER; during disposal, <br />enough heat to melt plastics <br />could be generated. <br />d. After the dry chemicals are thor- <br />oughly mixed, pour the dry <br />chemicals into the metal bucket; <br />then add one pint (one-half li- <br />ter) of cold water. <br />e. Let the kit react until it neutral- <br />izes and the heat dissipates. The <br />mixture will look like plaster. <br />18 <br />are no lumps. If there are lumps, <br />stir the mixture to dissolve them <br />before mixing the next kit. <br />f. Then, mix the next kit using the <br />same procedure. <br />NOTE: After the solution is neu- <br />tralized, itis non -hazardous and <br />may be disposed of. <br />REMEMBER: MIX ONLY ONE <br />KIT AT A TIME. <br />1.6.6 Connecting to other systems <br />Adapters available for connecting to <br />other systems include: threaded <br />adapters (bell or spigot by NPT or BSP <br />threads), reducerbushings (NPT), and <br />flanges. <br />Note: When using adapters with <br />spigot ends, it may be necessary to <br />cut off a portion of the factory pipe <br />bell if the threads are not fully ex- <br />posed. <br />1. Threaded adapters (NPT or BSP) <br />Figure 1.6.23 <br />