COMPLIANCE INFO_2007-2011 - Laserfiche WebLink

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n Bonding primary The table indicates the adhesive pot life under various temperature conditions. In hot Systems (cont.) 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 PSX•20 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 Force curing adhesive r , At temperatures below 50°F (10°C) or if the temperature will not be above 50°F (10°C) I Temperatures may be lower I during the entire period of cure, an external heat source must be used to force cure the in a trench or out of direct I adhesive. The adhesive and the bonding surfaces should be warmed to 50°F (10°C) sunlight. L ®®®®®®®®®®J before mixing and applying the adhesive. Below 50°F (10°C) force cure the adhesive with an external heat source such as: • Chem Cure Pak (US Pat. No. 3,475,239) • Ameron heating blanket sufficiently large to cover the joint • Forced air heater if the trench is covered to contain the heat • Hotairgun Using Chem Cure Pak with Ameron PSX•20 adhesive r------------- Chem Cure Pak contains oxalic acid. Harmful if swallowed. Causes 1 skin and eye irritation. L------------ -I Activator 1 -in slot syringe Tie wires Center Pak over tapered area Fig. 7-1. The Chem Cure Pak should produce steam in about 30 seconds after injecting water. If no reaction occurs, discard the Pak and use another one. The Chem Cure Pak is a self-contained, nonelectrical heat source for curing adhesive - bonded joints. Instructions are printed on the Pak wrapper. The Pak is designed so that sufficient heat is generated to cure Ameron PSX•20 adhesive in one hour at ambient temperatures as low as 0°F (-18°C). The Chem Cure Pak is manufactured in different sizes corresponding to the diameter of the piping being installed. Use the correct size Pak for your installation. Refer to table on page 11 when ordering. In cold weather, wrap insulation around the Pak as soon as it has stopped steaming. For lower temperatures or when installing extra -heavy fittings, consult Ameron for specific recommendations. • Assemble pipe and fittings using standard field installation procedures. • Mix the chemicals thoroughly as directed on the Pak wrapper. • Wrap the Pak around the connections, centering it over the tapered section of the joint, not over the end of the fitting. Cover the entire bonding area to which adhesive has been applied. Refer to Fig. 7-1. • Use one Pak per bond: sleeve couplings in 3 -inch sizes and larger require two Paks. However, a single Pak is sufficient for curing both bonds in a 2 -inch sleeve Coupling. • Secure the Pak with tie wires. • Cut one slit at least 1 inch wide (25 mm) on each upper side of the Pak. • Inject water into the slits with the activator syringe - approximately one half into each side • Aluminum foil may be wrapped directly over the joint to prevent the Pak from sticking if it is necessary that the expended Pak be removed from the trench. Follow the precautions printed on the Chem Cure Pak wrapper: • Do not get ingredients on skin, in eyes, or on clothing. • Do not breathe dust or vapor. • Use only outdoors where adequate ventilation is provided. • Do not take internally. • Keep out of reach of children. 10