24
Parameters of piping back sealing welding for mild steel (DCEP)
Parameters of piping back sealing welding for mild steel (DCEP)
MAINTENANCE AND TROUBLESHOOTING
25
Parameters of AC TIG (MMA) for Aluminum and its alloy
Sheet
thickness
/mm
Welding
wire
diameter
/mm
Tungste
n
electrode
diameter
/mm
Pre-heat
Temper
-ature
/
℃
Weldin
g
current
/A
Argon
flow
rate
/
L
·
min
-1
Gas
nozzle
diameter
/mm
Remark
1
1.6
2
-
45
~
60
7
~
9
8
Flange welding
1.5
1.6
~
2.0
2
-
50
~
80
7
~
9
8
Flange or butt
welding by one
side
2
2
~
2.5
2
~
3
-
90
~
120
8
~
12
8
~
12
Butt welding
3
2
~
3
3
-
150
~
180
8
~
12
8
~
12
V-groove butt
welding
4
3
4
-
180
~
200
10
~
15
8
~
12
5
3
~
4
4
-
180
~
240
10
~
15
10
~
12
6
4
5
-
240
~
280
16
~
20
14
~
16
Parameters of piping back sealing welding for mild steel
(
DCEP
)
Piping
diameter
Φ
/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.
MAINTENANCE AND TROUBLESHOOTING
25
Parameters of AC TIG (MMA) for Aluminum and its alloy
Sheet
thickness
/mm
Welding
wire
diameter
/mm
Tungste
n
electrode
diameter
/mm
Pre-heat
Temper
-ature
/
℃
Weldin
g
current
/A
Argon
flow
rate
/
L
·
min
-1
Gas
nozzle
diameter
/mm
Remark
1
1.6
2
-
45
~
60
7
~
9
8
Flange welding
1.5
1.6
~
2.0
2
-
50
~
80
7
~
9
8
Flange or butt
welding by one
side
2
2
~
2.5
2
~
3
-
90
~
120
8
~
12
8
~
12
Butt welding
3
2
~
3
3
-
150
~
180
8
~
12
8
~
12
V-groove butt
welding
4
3
4
-
180
~
200
10
~
15
8
~
12
5
3
~
4
4
-
180
~
240
10
~
15
10
~
12
6
4
5
-
240
~
280
16
~
20
14
~
16
Parameters of piping back sealing welding for mild steel
(
DCEP
)
Piping
diameter
Φ
/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.