Welding; Putting Out Of Operation; General Requirements - Rothenberger ROWELD P 250 A Bedienungsanleitung

If in case of different quality of pipe ends, a workpiece end is not to be machined, turn the block-
er for the single edge trimming (upper side of trimmer) to this side; which is not to be machined.
 After the front sides are trimmed flat, which can be recognized by a uniform and unbroken
chip, slowly move the pipes ends apart. Unlock the trimmer by pulling out the ring and swivel
it out.
 Move workpieces together and check whether the welded surfaces are flat. If this is not the
case, trimming must be repeated.
The axial offset between the workpieces must not be more than 10% of the wall thicknes and the
gap between the flat pipe surfaces must be more than 0,5 mm (according DVS). Otherwise ad-
just with help of the clamping screws and repeat trimming.
The trimmed surfaces prepared for welding must not be touched with the hands
and must be kept free of dirt!
3.2.3

Welding

Risk of crushing! Always maintain a safe distance from the machine when
moving clamping tools and pipes together! Never reach into the working area!
 Swivel the heating element between the two workpieces.
 Move pipe ends together, apply required adjusting force and hold on by screwing up the
knurled handle.
 As soon as the required bead height is reached evenly over the entire circumference at the
pipe ends, disengage the knurled handle, reduce the force to the corresponding preheating
force and screw up the knurled handle tightly again. It must be ensured that the workpiece
ends about evenly to the heating plate.
 After the preheating time is over, disengage clamping lever move workpieces apart, swivel
out the heating element and move the workpiece ends together again. While doing this, in-
crease the corresponding joining force as linearly as possible until the nominal force is
reached (see the accompanying book for welding parameters) and pull the clamping lever.
The joining force must be maintained during the entire cooling period.
 At the end of the cooling period, release the pressure via loosen the knurled handle and re-
lease the handle bar. Unclamp and take out the welded tube sections.
All welding parameters can be found in the enclosed welding tables.
3.2.4

Putting out of operation

 Switch off heating element.
 Unplug the heating element and trimmer unit.
 Swivel trimmer and heating element into the space between the main clamps and unscrew
the handle bars.
 Wind up flex.
The hotplate must be cooled off!
 Put the machine with upper part of the transport box from the base of transport box, the
base put over the machine, and close the locks.
3.3

General requirements

As weather and ambient conditions can seriously effect welding procedures and joints, it is es-
sential to duly observe national welding guidelines and ordinances, e. g. DVS Guideline 2207,
Sections 1, 11 and 15.
Welding requires continuous and due supervision and monitoring!
ENGLISH 13