Because cements and
primers are flammable, care should be taken to avoid sparks,
heat or open flame in both work and storage areas. Direct
contact with eyes and skin should be avoided. Proper ventilation
is mandatory when working indoors.
ENVIRONMENT
Temperature extremes
are not conducive to good solvent cementing. Environments
with temperatures of above 110° F or below 40° F
should be avoided.
EQUIPMENT
Appropriate cement and
primer, cutting and deburring tools, daubers with a minimum
surface of one-half the pipe diameter, and pipe joiners for
large-diameter pipe and fittings are available in the Ryan
Herco catalog. They should be supplemented with natural fiber
brushes for larger-diameter pipe and fittings.
PROCEDURE
Inspect pipe for a square, deburred cut
and a 10° - 15° beveled end. With a dry, clean
rag, remove all foreign matter fromt he pipe and fitting
surface to be welded. Check the dry fit for 1/4 - 3/4
of the socket.
Dissolve the inside socket of the fitting
with appropriate primer by repeated strokes of a well-wetted
applicator.
Dissolve the surface area of pipe in
similar manner.
Apply a second application of primer
to the inside socket of fitting; then immediately apply
a generous amount of cement to the outside of the pipe.
Cement applications to both pipe and fitting should be
made while the primer is still wet.
Apply cement to the inside of the fitting.
Here caution should be taken on the amount applied, since
any excess will piddle inside the system and may cause
a weakness.
Immediately apply a second application
of cement to the pipe, and while both surfaces are still
liquid, bottom the pipe into the fitting, rotating the
pipe 90° if possible, and hold until the pipe will
not "push out," normally less than 30 seconds.
Wipe any excess cement from the pipe
and observe the set time and cure time charts below.
Never test the system with air pressure. PVC and CPVC
piping systems are not recommended for gaseous systems
under pressure.
SET
TIME FOR 3875 & 3675 CEMENTS FOR PVC SCHEDULE 80 PIPE AND
FITTING JOINTS
30 minutes minimum at
60-100° F
1 hour minimum at 40-60° F
2 hours minimum at 20-40° F
4 hours minimum at 0-20° F
CURE TIME FOR 3875 & 3675 CEMENTS FOR PVC SCHEDULE
80 PIPE & FITTING JOINTS
