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OPERATION
21
§4.4.4 Electrode selection
The welding current reference for different electrode diameter
Electrode
diameter /mm
1.6
2.0
2.5
3.2
welding current
/A
25 40
40 60
50 80
100 130
The relation between the welding current(I)’ factor(K) & electrode diameter(d) (I K×d: Carbon electrode)
Electrode diameter
/mm
1.6
2 2.5
3.2
Factor/K
20 25
25 30
30 40
Notice: the above parameters originate from Welding Dictionary P66 P67, Volume 1 of
Edition 2.
§4.5 Operation Environment
Height above sea level is below 1000m.
Operation temperature range:-10
0
C +40
0
C.
Relative humidity is below 90 % (20
0
C).
Preferably site the machine some angles above the floor level, the maximum angle does not
exceed 15
0
.
Protect the machine against heavy rain or in hot circumstance against direct sunshine.
Parameters of piping back sealing welding for mild steel
DCEP
Piping
diameterΦ/mm
Tungsten
electrode
diameter/mm
Gas nozzle
diameter/mm
Welding wire
diameter/mm
Welding
current/A
Arc
voltage/V
Argon
flow
rate
/
L·min
-1
Welding
rate
/
cm·min
-1
38
2.0
8
2
75 90
11 13
6 8
4 5
42
2.0
8
2
75 95
11 13
6 8
4 5
60
2.0
8
2
75 100
11 13
7 9
4 5
76
2.5
8 10
2.5
80 105
14 16
8 10
4 5
108
2.5
8 10
2.5
90 110
14 16
9 11
5 6
133
2.5
8 10
2.5
90 115
14 16
10
12
5 6
159
2.5
8 10
2.5
95 120
14 16
11
13
5 6
219
2.5
8 10
2.5
100
120
14 16
12
14
5 6
273
2.5
8 10
2.5
110
125
14 16
12
14
5 6
325
2.5
8 10
2.5
120
140
14 16
12
14
5 6
Notice: the above parameters originate from Welding Dictionary P167, Volume 1 of Edition 2.
