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7 Bonding primary Applying Ameron adhesive systems(cont'd.) PSXTm34 adhesive contains grit to aid in installation.Excessive amounts of adhesive may(1)cause flow restriction inside the pipe when the adhesive has cured,(2)block the opening of the containment pipe,or(3)result in`hydraulic backout'as the adhesive cures.Hydraulic backout occurs when excess adhesive prevents the joint from maintaining an interference fit and the spigot backs out of the bell during cure.The inclusion of grit reduces this possibility significantly. Remove closure assembly from fitting and slide all parts(threaded nut,small O-ring and 1i threaded closure)onto the appropriate pipe legs.Temporarily secure these parts in place by hand tightening the nut on the closure with small O-ring in place.The large O-ring can , ^ ,n be left in place on the containment fitting unless it is excessively dirty. Coat the tapered surface and cut end of the primary pipe or the entire tapered section of adapters with adhesive.Apply a thin,even coat of mixed adhesive to the inside of the bell of fittings.Completely wet all matching surfaces with the adhesive.Wipe off excess adhesive with the spatula or brush provided in the kit. Fig. 7-1.During primary assembly, closure piece,nut and small O-ring are At fittings where the containment is to be terminated,take care when applying adhesive so moved away from fitting.Lightly excess adhesive does not get on primary pipe where termination sleeves will need to seal. re-assemble pieces onto fitting when Also,the gap between the 2-inch LCX coupling sleeve and the primary sleeve coupling bond is first made to check proper alignmentofjoint. is small.Excess adhesive on these bonds can prevent the coupling sleeve from slipping into place without having to sand down the high spots. Making the joint After aligning the mating surfaces so that they may be brought together in a straight line: • Insert spigot all the way into the bell. • Twist one quarter of aturn when possible,while pushing together to distribute adhesive evenly and to achieve an interference fit.A slight reverse twist will then lock the joint. • Remove any excess adhesive. • Do not cock the joint. • Hand tighten the LCX closure onto the fitting while joint is curing.This will assure �} alignment and prevent cocked joints. • Over-insertion of the joint may collapse the spigot and cause a leaky joint. • Under-insertion of the joint may also cause a leaky joint. Fig. 7-2.Completely wet all matching • Do not drive the joint together with a hammer. surfaces with the adhesive.Wipe off 0 Do not disturb the joint while the adhesive is uncured. excess adhesive with the spatula provided 0Do not move adjacent pipe and fittings until adhesive has set. in the kit. If it is impossible to twist the pipe or fitting while inserting because it is the last fitting in the line or there is not enough room in a sump,the fitting can be gently tapped into place by placing a Yz"thick rubber pad on the end of the fitting and tapping it with a rubber mallet to seat the joint. Pot life/cure times for Ameron adhesive Pot life is measured from the time the hardener and resin are first mixed until the r , adhesive starts to thicken and harden and no longer can be used.Do not use adhesive Do not use any type of hammer once the can has become hot. or mallet to make up the joint. The table indicates the adhesive pot life under various temperature conditions.In hot L———————————J weather,pot life may be extended by wrapping a damp rag around the can of mixed adhesive or by spreading the adhesive on aluminum foil to dissipate the heat. Pot life/cure times for Ameron adhesive Minimum Ambient Adhesive Minimum Joint Temperature Pot Life Cure Time' (°F) (°C) (minutes) (hours) 40 5 70 12 65 18 40 5 75 24 30 4 95 35 20 3 Cumulative totals.Cure time at listed temperatures need not be uninterrupted,but total time must equal the tabulated time before the system is pressure tested.