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® r r E r <br />Pot life/cure time Piping systems incorporating B20 bonds can be put into service after curing at ambient <br />temperatures for the times indicated in the table. The table also indicates the pot life <br />(working time) of a mixed 5 -oz kit at various temperatures. The pot life of adhesives is <br />measured from the time the hardener and resin are first mixed until the adhesive starts <br />to thicken and can no longer be used. <br />Minimum Ambient <br />Adhesive <br />Minimum Joint <br />Temperature <br />Pot Life <br />Cure Time <br />(°F) (°C) <br />(minutes) <br />(hours) <br />40 5 <br />70 <br />12 <br />65 18 <br />40 <br />5 <br />75 24 <br />30 <br />4 <br />95 35 <br />20 <br />3 <br />In sub -zero or extremely windy conditions, extend the heat -cure times accordingly and <br />use insulation as necessary to insure adequate bonding. Cap the ends of the piping to <br />prevent the passage of cold air. In severe conditions, warm air may be blown through <br />the interior of the pipe. <br />A heat cure is recommended for installations with service temperatures above 180'F <br />(82°C) or operating pressures over 300 psi. For ambient temperature conditions below <br />40°F (5°C), an external heat cure must be used. A minimum heat cure time of at least <br />30 minutes is recommended for 2 through 6 -inch pipe. Even after the adhesive has <br />turned solid at ambient temperatures, heat curing will promote chemical cross-linking <br />of the adhesive, thus increasing its strength, temperature resistance and corrosion <br />resistance. A single Chem Cure Pak may be applied or an Ameron-approved electric <br />heat blanket may be used. The heat cure may be applied at any time after the bond is <br />made and before the pipe has been tested or put into service. The heat may be applied <br />at any time after making the bond while the adhesive is still liquid or after it has gelled to <br />a solid. <br />Kit sizes and Adhesive kits are available in 1, 5, and 8 -oz sizes. The table indicates the number of <br />bonds per kit bonds per kit for each respective pipe size. Values in the table are based on the <br />quantity of adhesive required by an experienced crew working at a temperature of <br />75°F (24°C) with a 30 -minute adhesive pot life. <br />Primary Fittings Bonds per Kit <br />Shipping Bonds per Kit <br />Kit Size Weight Nominal Pipe Size (in) <br />(oz) (lb) 2 3 4 6 8 10 12 14 16 <br />1 0.5 2 1 1 - - - - - - <br />5' 1.2 12 8 6 2 2 2 2 1 1 <br />8' 1.4 - 14 9 4 3 3 3 2 2 <br />Available in six-pak kits. <br />Containment Fittings Bonds per 5 -oz Adhesive Kit <br />Nominal <br />Pipe Size Adhesive 90° 45' Concentric <br />(in) (mm) Type Elbows Elbows Tees Reducers Saddles Couplings <br />3 80 B20 2 2 1 1/2 3 2 11/2 <br />4 100 B20 2 2 <br />n <br />3 <br />