How to Guide

96
Plastics Technical Manual
The joint should not be disturbed until it has initially set. The chart below shows the recommended initial set and cure times for
ABS, PVC and CPVC in iron pipe size diameters as well as for FlowGuard Gold
®
and ReUze
®
CTS CPVC.
Joint Curing
*For relative humidity above 60%, allow 50% more cure time.
The above data are based on laboratory tests and are intended as guidelines.
For more specific information, contact should be made with the cement manufacturer.
Recommended Curing Time Before Pressure Testing
Recommended Initial Set Times
Temperature Diameter Diameter Diameter Diameter
Range
1
⁄2 ” to 1
1
⁄4 ” 1
1
⁄2 ” to 3 ” 4 ” to 8 ” 10 ” to 16 ”
60° - 100° F 15 min 30 min 1 hr 2 hr
40° - 60° F 1 hr 2 hr 4 hr 8 hr
0° - 40° F 3 hr 6 hr 12 hr 24 hr
RELATIVE HUMIDITY CURE TIME CURE TIME CURE TIME CURE TIME
60% or Less* Diameter
1
⁄2 ” to 1
1
⁄4 ” Diameter 1
1
⁄2 ” to 3 ” Diameter 4 ” to 8 ” Diameter 10 ” to 16 ”
Temperature Range
During Assembly and Up to Above 180 Up to Above 180 Up to Above 180 Up to
Cure Periods 180 psi to 370 psi 180 psi to 315 psi 180 psi to 315 psi 100 psi
60° - 100° F 1 hr 6 hr 2 hr 12 hr 6 hr 24 hr 24 hr
40° - 60° F 2 hr 12 hr 4 hr 24 hr 12 hr 48 hr 48 hr
0° - 40° F 8 hr 48 hr 16 hr 96 hr 48 hr 8 days 8 days
For Primer: double the number of joints shown for cement.
* These figures are estimates based on IPS Weld-on laboratory tests.
Due to many variables in the field, these figures should be used as a general guide only.
*Average number of joints per Quart for Cement and Primer (Source: IPS Weld-on)
Pipe
Diameter
1
⁄2 ”
3
⁄4 ” 1 ” 1
1
⁄2 ” 2 ” 3 ” 4 ” 6 ” 8 ” 10 ” 12 ” 15 ” 18 ”
Number
of Joints 300 200 125 90 60 40 30 10 5 2 to 3 1 to 2
3
⁄4
1
⁄2
INSTALLATION PROCEDURES
A joint should not be pressure tested until it has cured. The
exact curing time varies with temperature, humidity, and
pipe size. The presence of hot water extends the cure time
required for pressure testing. Pressurization prior to joint
curing may result in system failure.