Rothenberger ROWELD E Series - Reference of Welding Standard（Dvs2207-1-1995

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5.Reference of Welding Standard（DVS2207-1-1995）
5.1 Because of difference in welding standard and PE material, the time and pressure vary in
different phases of welding. It suggests that the actual welding parameters should be offered
by pipes and fittings’ manufacturers.
5.2 Given welding temperature of pipes made from PE 、 PP and PVDF by DVS standard
ranges from180℃ to 270℃. Application temperature of heating plate is within 180 ～230℃,
and its max. surface temperature can reach 270℃.
5.3 Reference standard DVS2207-1-1995
熔接压力
t5
t2
t1
t3
t4
吸热压力
（Bead build-up pressure ）Welding pressure =（P1）P3+Drag pressure
Section of welding pipe ends
welding pressure = × 0.15 + Drag pressure（MPa）
Total section of cylinders
Note:The drag pressure is not more than 50% of the welding pressure.
Pipe
diamete
r
Wall
thickness
Bead
build-up
pressur
e
Bead
height
Soaking
pressur
e
Soaking
time
Change-
over
time
Pressure
build -up
time
Welding
pressur
e
Cooling time
D
e
P1
H
P2
t2
t3
t4
P3
t5
Section of welding pipe ends =
3.14 ×(Pipe diameter - Wall thickness
）
× Wall thickness
Bead pressure
Welding pressure
Soaking pressure
Time