Facing The Pipe Butts; Checking Pipe Alignment And Determining Drag Pressure - Hürner WeldControl 2.0 500 Manuel Utilisateur

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the whole set of parameters as an overview. In case there are errors,
it is possible either to enter all data once more by pressing the STOP/
RESET key, or to return to the previous step by pressing ñ and correct
the data one at a time.
If pipe codes were entered previously in the traceability data for the
joint, the machine automatically presents the welding parameters
contained in the pipe codes for confirmation.

4.3.1 Facing the Pipe Butts

To ensure that the pipe butts are level, insert the pipe facing tool be-
tween the machine carriages and turn it on. Using the carriage mover
lever on the hydraulic unit, have the movable carriage close in toward
the center in order to bring the pipes into contact with the facing tool.
Use the pressure regulator to adjust the pressure manually while the
facing tool is trimming the pipes.
The farther the carriage mover lever is pushed to the left,
the faster the carriage closes in and the faster pressure in-
creases. The farther it is pushed to the right, the faster the
carriage of the machine moves apart, and the faster pressure
Info
decreases.
Pipe facing should continue until shaving forms a continuous blade
that rolls twice or three times around the pipe ends, so the butts are
level. Facing is stopped by moving the carriage apart with the car-
riage mover lever.
If you discover after the facing process that the butts are still not level,
start over, insert the facing tool and repeat the process. When facing
is properly done, pipe alignment has to be checked.
The facing process is shown on the display screen (see Display 17). The
START/SET key has to be pressed by the welder to confirm that facing
is properly finished.

4.3.2 Checking Pipe Alignment and Determining Drag Pressure

When the pipes are properly faced, close in the movable carriage
completely to check whether a potential vertical and horizontal pipe
misalignment is within the tolerance allowed by the applicable welding
standard. The maximum acceptable gap between them is displayed (see
Display 18). If pipe alignment is in order, the welding proper can start.
If the misalignment is outside tolerance, the pipes must be readjusted
in the clamps and, if needed, facing has to be repeated.
When pipe alignment is appropriate, move the carriage apart using
the carriage mover lever; make sure the movable carriage is as far
apart as possible before continuing. Turn the maximum pressure regu-
lator counter-clockwise as far as it will go to have zero pressure in
the hydraulic circuit. Then set the carriage mover lever to its close-in
position while simultaneously turning the maximum pressure regula-
tor gradually clockwise. Watch the display closely to observe at which
pressure level the carriage is "dragged" to start moving.
The START/SET key has to be pressed when the carriage starts moving,
in order to save the drag pressure applicable to this welding to
memory.
The exact drag pressure depends on various conditions (pipe
size and material, position of the machine, etc.) and has to
be determined for every welding individually.
Important
Version October 2020 HÜRNER WeldControl 2.0 500 User's Manual
Face Pipe Ends
230°C ACT. 0.5bar
Display 17
Check Pipe Alignment
Max. Gap :2.5mm
Display 18
Set Drag Pressure
230°C ACT. 3.5bar
Display 19
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