How to...
Step 4
Insert the trimming tool and close the clamps to butt the
pipe ends against the cutting blade.
ff Run the trimming tool until continuous shavings are
achieved from both of the pipe ends
ff Clean out all of the shavings after the trimming
operation
Step 7
Maintain the pressure for the correct “soak time” until a
uniform bead of molten material is formed
ff Soak time is obtained from the Time and Pressure table
and is further dependent on the ambient temperature
Step 8
Open the clamps and remove the heater plate
ff Ensure that the plate does not drag over the heated
surfaces
Step 9
Immediately close the clamps to the scheduled pressure to
form the butt weld joint
ff Maintain the pressure for the minimum cooling time to
complete the joint
ff Do not move the pipe or welding machine during the
cooling phase
Step 5
Remove the trimming tool and close the clamps to check
that there are no gaps between the weld faces
Step 6
Open the clamps and insert the preheated heating plate
between the joint faces and then close the clamps
ff Ensure that the correct pressure is applied to the clamps
(refer to the Time and Pressure tables)
28
SABI | DECEMBER 2015/JANUARY 2016
Step 10
Remove the clamping mechanism from the pipe and
relocate to the next jo [