Instructions / Assembly

®
System 1738 Installation Methods 15
System 1738 Solvent Weld Appliance
Service Time
** These figures are estimates based on testing done
under laboratory conditions. Field working conditions can
vary significantly. This chart should be used as a general
reference only.
NOTE: THE AVERAGE APPLIANCE SERVICE TIME SCHEDULE
IS APPLICABLE IF THE FOLLOWING CONDITIONS HAVE
BEEN MET:
1. All joints have been made per requirements of this
guide
2. All joints pass the 1/2 to 2/3 interference dry fit test
3. Vertical weight loads (i.e. pipe) with freshly made
joints, need to be fully supported during the Appliance
Service time
4. The Appliance Service times for various ambient
temperatures are to be followed (as indicated in the
Average Appliance Service Time Schedule above)
Newly assembled joints require a certain amount of time
to lapse prior to being placed into appliance service.
“Appliance Service Time” is the time required to expire
from when the joint is made to the time it is placed into
service. Newly assembled joints need to be handled with
care during this time. ALL VERTICAL ASSEMBLIES shall be
fully supported during this period.
Average Appliance Service Time
Temperature Range
Joint Size
˚F (Fahrenheit) 2" to 4"
60 - 105 30 min
40 - 60 2 hr
3 - 40 12 hr
Note - In damp or humid conditions above 60% relative
humidity, allow at least 50% more set time.
Average Appliance Service Time is for flue gas
venting applications only.
CAUTION
During the curing of the solvent welded joints, vapors
may accumulate inside the piping system, especially
should one end of the line be capped. Nearby sparks
from welders or torches may inadvertently ignite these
vapors and create a hazardous incident. Attention
must be given to removing all vapors using air-blowers
or water flushing prior to capping one end of an
empty piping system.
WARNING