GF CNC 4.0 400 Betriebsanleitung Seite 81

Operating instructions CNC 4.0 400/500/630
Attention
Attention
To calculate the hydraulic working pressure (P1, P2, P5, P6) to be set,
refer to the required interfacial pressure between pipe ends in the
specific welding phase and calculate it by using this formula:
P [bar] = (Interfacial pressure [N/mm2] x Pipe fusion area* [mm2]) / (10 x
Total piston area** [mm2])
* see chapter 5
** depending on pipe Ø and SDR
If the input value of a parameter is out of the machine limits an error will
occur, so you have to change it.
11 FREE welding standard
75