Hawkeye PE Fittings - Manual (Page 4)

Hawkeye Industries Inc. TB-0308-FF
4/5 Hawkeye Industries Inc. Technical Bulletin: FPR IDC and NIDC Fittings
Figure 6.2.1.6 Reconfirm pipe alignment
6.2.2 Melt and Bead Formation
Fusion must only be performed at the specified fusion
temperature. Ensure the heater element is at temperature
before introducing it into the fusion process.
Insert heater between the pipe ends, and bring the pipe ends
together with the contact pressure.
Figure 6.2.2.1 Insert Heater between pipe ends
Figure 6.2.2.2 Apply Contact Pressure
Hold the pipe ends against the heater at contact pressure
until there is indication of melt around the circumference of
the pipe ends.
Lower the pressure between the pipe ends and the heater to
drag pressure, per fusion machine manufacturer
specifications. Do not separate the pipe ends from the
heater. If the pipe ends lose contact with the heater, cancel
the fusion procedure, wait for pieces to cool, and start again
from 6.2.1.
Figure 6.2.2.3 Reduce pressure when melt around pipe is evident.
Keep the pipe ends in contact with the heater at the drag
pressure until the appropriate-sized bead forms. Consult
table 6.1 for bead size ranges.
From To From To
2 3 2.0 3.0
3 8 3.0 5.0
8 12 5.0 6.0
12 24 6.0 11.0
Bead Size Pipe Size
H (mm) (NPS)
Table 6.2 Recommended Bead Sizes for Pipe Size Ranges
Refer to figure 6.2.6.1 for dimensional diagram
6.2.3 Remove Heater & QUICKLY inspect
Once the bead on the pipe ends is the appropriate size, bring
the pipe ends apart and remove the heater. Quickly inspect
the ends for indications of failure. The melted surfaces
should be smooth, free of bubbles or marks, and flat.
Figure 6.2.2.4 Remove heater and inspect fusion surfaces.
6.2.4 Join
If the pipe ends are acceptable as per 6.2.3, quickly, but
gently, bring the pipe ends together and ramp up to joining
pressure.
Figure 6.2.2.3 Bring ends together with fusion force.
If there is a discrepancy in the appearance of the joint as the
pipe ends are fused (misalignment, debris, bubbling or any