widos 8000 WM SPA, Working Instructions Translation

Page: 56 / 114

Welding process Chapter 6
09.06.15 Working Instructions WIDOS 8000 WM SPA page 56 of 108
Check mismatch of the pipe ends. If mismatch is ok, open pipes, <joystick 13> on:
and confirm it by <Enter>.
The mismatch according to DVS may not exceed 10 % of the wall thickness.
The allowed crack according to DVS may not be larger than:
- 1.0 mm for pipes with OD <630 mm
- 1,3 mm for pipes with OD 630…800 mm.
- 1,5 mm for pipes with OD >1000 mm.
In case the mismatch is too large, align the pipes horizontally at the right table with the
ratchet tightener, resp. readjust the pipe ends within the clamping tools.
Thereafter repeat planing.
6.2.5. Bead up
Move the heating element being clean and heated up to nominal temperature into
machine with <joystick 5> on: .
Close pipes, <joystick 13> on: .
Display:
2nd line:
bead up
Ps=15 Pi=3
Display of:
desired and actual pressure
alternating with:
Display:
2nd line:
bead up
T=210°C Pi=3
Display of:
heating element temperature and actual pressure
Slowly raise pressure with <pressure controller 12> up to actual pressure =
nominal pressure (when reaching the nominal pressure there will be a short
beeping sound).
Maintain pressure until the pipe completely butts against the heating
element and a bead has built according to DVS.
The heating element temperature is heated up to more than 200°C!
Do not touch the surfaces of the heating element.
Take enough safety distance to inflammable materials.
Do wear safety gloves.
The travelling area of the heating element must be clear!