Starting
and
operating
Chapter 5
06.05.19
Working Instructions WIDOS 2500 / OD 315 with T-90°
Page 23 of 35
5.8.2.
Welding T-pieces
First weld:
Mount the reduction inserts according to the pipe diameter to be welded.
Insert the sawed pipes into the left-hand and right-hand T-piece clamping devices in such a
manner that the distance between inner edge of the pipe and inner edge of the clamping device is
the same at both pipes. Clamp the pipes.
Insert the planer between the work pieces, switch it on and keep the button (no. 11) at the planer
handle pressed. Plane parallel with low pressing force.
Planing has to be carried out until a revolving cutting has been formed on both sides.
Open the support again, release button (no. 11) and swivel out the planer.
Remove the produced cuttings without touching the worked surfaces.
Close the support.
Check pipe mismatch and gap on the joining pipe ends.
According to DVS 2207, the mismatch on the pipe outer side must not exceed 0.1 x pipe wall
thickness, the admissible gap must not exceed 0.5 mm. The mismatch compensation is carried out
by further tightening or releasing of the clamping nuts.
In case mismatch compensation was carried out, planing must be repeated afterwards.
The welding process is the same as for straight pipes. Multiplicate the force values taken from
the table with factor 0.71.
After expiration of the cooling time, release the force, open the clamping tools, remove the welded
parts and open the support.
Second weld:
Turn the welded piece for 90°, insert it in the right-hand T-piece clamping device and clamp it.
Insert the sawed pipe in the left-hand T-piece clamping device.
Insert the planer between the work pieces, switch it on and keep the button (no. 11) at the planer
handle pressed. Plane parallel with low pressing force.
Planing has to be carried out until a revolving cutting has been formed on both sides.
Open the support again and swivel out the planer.
Remove the produced cuttings without touching the worked surfaces.
Содержание 2500 / OD 315
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