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Rothenberger ROWELD E Series - Welding Standard Reference (DVS2207-1-1995); DVS2207-1-1995 Standard Parameters

Rothenberger ROWELD E Series
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79
5.Reference of Welding StandardDVS2207-1-1995
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 Reference standard DVS2207-1-1995
t5
t2
t3
t4
Bead build-up pressure Welding pressure =P1P3+Drag pressure
Section of welding pipe ends
welding pressure = × 0.15 + Drag pressureMPa
Total section of cylinders
Note:The drag pressure is not more than 50% of the welding pressure.
Wall
Thickness
mm
Bead
height
mm
Bead
build-up
pressure
MPa
Soaking
time
t
2
sec
Soaking
pressure
MPa
Change-
over time
t
3
sec
Pressure
build -up
time
t
4
sec
Welding
pressure
MPa
Cooling
time
t
5
min
0
4.5
0.5
0.15
45
0.02
5
5
0.15±0.01
6
4.5
7
1.0
0.15
45
70
0.02
5
6
5
6
0.15±0.01
6
10
7
12
1.5
0.15
70
120
0.02
6
8
6
8
0.15±0.01
10
16
12
19
2.0
0.15
120
190
0.02
8
10
8
11
0.15±0.01
16
24
1926
2.5
0.15
190260
0.02
1012
1114
0.15±0.01
2432
2637
3.0
0.15
260370
0.02
1216
1419
0.15±0.01
3245
37
50
3.5
0.15
370
500
0.02
16
20
19
25
0.15±0.01
45
60
5070
4.0
0.15
500700
0.02
2025
2535
0.15±0.01
6080
Section of welding pipe ends =
3.14 ×(Pipe diameter - Wall thickness× Wall thickness
Bead pressure
Welding pressure
Soaking pressure
Time

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