I.T.S. Ital Trade Services PT 500 with revolving facing tool & heating mirror Operating Manual
18
5.1
Welding Parameters for PE & PP sheets,pipes & fittings according to DVS 2207-1
Nominal Wall thickness
mm
Alignment
Bead height on heater
plate at the end of the
alignment time (alignment
under 0.15 N/mm
2
)
mm (minimum values)
Heating-up
Heating-up time= 10 x
wallthickness (heating-
up 0.02 N/mm
2
)
s
Changeover time
S (maximum time)
Joining pressure
s
Cooling time under
joining pressure p=0.15
N/mm2 0.01
Min (minimum values)
MATERIAL PE
Temp.
<15°c
Temp.
15-
+25°c
Temp.
25-
40°c
Until 4.5
0.5
45
5
5
4
5
6,5
4.5 … 7
1.0
45 … 70
5 … 6
5 … 6
4 - 6
5-7,5
6,5-9,5
7 … 12
1.5
70 … 120
6 … 8
6 … 8
6–9,5 7,5-12
9,5-15,5
12 … 19
2.0
120 … 190
8 … 10
8 … 11
9,5-14 12-18
15,5-24
19 … 26
2.5
190 … 260
10 … 12
11 … 14
14-19 18-24
24-32
26 … 37
3.0
260 … 370
12 ... 16
14 … 19
19-27 24-34
32-45
37 … 50
3.5
370 … 500
16 … 20
19 … 25
27-36 34-46
45-61
50 ... 70
4.0
500 … 700
20 … 25
25 … 35
36-50 46-64
61-85
70 … 90
4,5
700 … 900
25 … 30
35 … 35
50-64 64-82
85-109
90 … 110
5
900 … 1100
30 … 35
35 … 35
64-78
82-100
109-133
110 … 130
5,5
1100 … 1300
35 … 35
35 … 35
78-92
100-118 133-157
Example on how to calculate the cooling down (t5) time following the DVS NORM
As per drawing above the time
T
corresponds to wall thickness value
X in
mm
. To calculate this time (t5 in minutes) please follow the formula below:
Example:
If you want to calculate the cooling down time for a
6mm
wall thickness pipe, you must simply substitute the variable
X
with the value
6
:
min
,
)
,
(
,
T
4
8
5
4
6
5
4
7
6
10
6
=
−
⋅
−
−
+
=
To calculate the other times (
t3
and
t4
) you must use the same principle of linear interpolation.
To obtain the
t2
(in seconds) value use the formula below where the variable wt corresponds to the nominal wall thickness
)
mm
(
wt
(sec)
T
⋅
=
10
2
)
5
,
4
(
5
,
4
7
6
10
6
−
⋅
−
−
+
=
x
T