+GF+ SG 160 - Heating element butt fusion of PVDF

Operating instructions SG 160 9 Fusion data
47
Heating element butt fusion of PVDF
Fusion chart according to DVS 2207-15
Heating element temperature 240 °C ± 8 °C
1
2
3
4
5
Nominal wall
thickness
Equalize
Bead height on the
heating element after
equalization time
(equalization at
0.10 N/mm
2
)
Heat soak
Heat soak time = 10 x
wall thickness +40 s
(heat soak
≈ 0.01 N/mm²)
Change
-
over
Join
Fusion pressure build-
up time
Cooling
Cooling time at fusion
pressure
(p = 0.10 N/mm²
± 0.01)
Cooling time = 1.2 x
wall thickness + 2 min
mm
mm
(min.value)
s
s
(max. time)
s
min
(min.value)
1.9 – 3.5 0.5 59 – 75 3 3 – 4 5.0 – 6
3.5 – 5.5 0.5 75 – 95 3 4 – 5 6.0 – 8.5
5.5 – 10.0 0.5 – 1.0 95 – 140 4 5 – 7 8.5 – 14
10.0 – 15.0 1.0 – 1.3 140 – 190 4 7 – 9 14.0 – 19
Diagram of standard values for heater temperatures in relation on pipe wall
thickness
Process steps for heating element butt fusion
215
220
22
5
23
0
235
240
24
5
0
5
10
15
20
25
30
35
40
45
50
55
Pipe wal l thickness / Rohrwanddicke /Spessore tu bo mm
°C
T = 2
4
0°C
(
±8°C
)
= constant