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Welding technique
Gas nozzle diameter/mm
6.4
8
9.5
11.1
Notice: the above parameters originate from <<Welding Dictionary>> P142,Volume 1 of Edition 2.
Gas nozzle and the shield gas flow rate
DC positive connection
Welding
Gas nozzle
current range/A
diameter/mm
rate/L•min-
10~100
4~9.5
101~150
4~9.5
151~200
6~13
201~300
8~13
Notice: the above parameters originate from <<Welding Dictionary>> P149,Volume 1 of Edition 2.
Tungsten Electrode
Tungsten
Sharpened of
Electrode
the Electrode
Diameter/mm
Diameter/mm
1.0
0.125
1.0
0.25
1.6
0.5
1.6
0.8
2.4
0.8
2.4
1.1
3.2
1.1
4.0
1.5
Parameters of piping back sealing welding for mild steel(DCEP)
Welding
Piping
Tungsten
Gas nozzle
wire diameter/mm
diameter
electrode
diameter/mm
Welding current/A
Φ/mm
diameter/mm
38
2.0
8
42
8
2.0
60
2.0
8
76
2.5
8~10
108
2.5
8~10
133
2.5
8~10
159
2.5
8~10
219
2.5
8~10
273
2.5
8~10
325
2.5
8~10
Notice: the above parameters originate from <<Welding Dictionary>> P167, Volume 1 of Edition 2.
54
Electrode diameter/mm
0.5
1.0
1.6 or 2.4
3.2
AC
Gas flow
Gas flow
Gas nozzle
rate/L•min-
1
diameter/mm
4~5
8~9.5
6~8
4~7
9.5~11
7~10
6~8
11~13
7~10
8~9
13~16
8~15
Background
Angle of Cone(º)
Current/a
12
2~15
20
5~30
25
8~50
30
10~70
35
12~90
45
15~150
60
20~200
90
20~300
Arc
Welding
Argon flow
Welding
voltage/V
current/A
rate/L•min-
rate/cm•min-
1
2
11~13
6~8
75~90
2
11~13
6~8
75~95
2
75~100
11~13
7~9
2.5
80~105
14~16
8~10
2.5
90~110
14~16
9~11
2.5
90~115
14~16
10~12
2.5.
95~120
14~16
11~13
2.5
100~ 120
14~16
12~14
2.5
110~ 125
14~16
12~14
2.5
120~ 140
14~16
12~14
Workpiece
Joint form
thickness
/mm
0.8
1.0
1.5
1.5
Corner joint
2.4
2.4
Corner joint
3.2
1
3.2
Corner joint
4.8
4.8
Corner joint
6.0
Notice: the above parameters originate from <<Welding Dictionary>> P150,Volume 1 of Edition 2.
Parameters of AC TIG(MMA) for Aluinum and its alloy
Welding
Steet
wire
thickness
diameter
/mm
/mm
1
1.6
1.5
1.6~2.0
2
2~2.5
3
2~3
4
3
5
3~4
6
4
8
4~5
10
4~5
1
12
4~5
14
5~6
4~5
4~5
16
5~6
4~5
18
5~6
4~5
5~6
20
5~6
5~6
16~20
5~6
5~6
22~25
5~6
5~6
5~6
Notice: the above parameters originate from《Welding Dictionary》P538, Volume 2 of Edition 2.
5~6
TIG of stainless steel(single run welding)
tungsten
welding
Argon gas
electrode
wire
flow rate/
diameter
diameter
L•min-
/mm
/mm
Butt joint
1.0
1.6
Butt joint
1.6
1.6
Butt joint
1.6
1.6
1.6
1.6
Butt joint
1.6
2.4
1.6
2.4
Butt joint
1.6
2.4
1.6
2.4
Butt joint
2.4
3.2
3.2
3.2
Butt joint
4.0
4.0
Tungsten
Pre-heat
eletrode
Argon flow
Welding
Temper
diameter
rate/L•min-
current/A
-ature/ºC
/mm
2
45~60
7~9
2
50~80
7~9
2~3
90~120
8~12
3
150~180
8~12
4
180~200
10~15
4
180~240
10~15
5
240~280
16~20
5
100
260~320
16~20
5
100~150
280~340
16~20
5~6
150~200
300~360
18~22
5~6
180~200
340~380
20~24
6
200~220
340~380
20~24
6
200~240
360~400
25~30
6
200~260
360~400
25~30
6
200~260
300~380
25~30
6~7
200~260
360~400
30~35
Welding technique
welding
Welding
current
speed/
(DCEP)
1
cm•min-1
5
20~50
66
5
50~80
56
65~105
7
30
7
75~125
25
7
85~125
30
95~135
7
25
7
100~135
30
7
115~145
25
150~225
8
25
9
175~250
20
10-12
220~300
25
Gas nozzle
diameter
Remark
1
/mm
Flange welding
8
Flange or butt
8
welding by
one side
8~12
Butt welding
8~12
8~12
10~12
V-groove
butt welding
14~16
14~16
14~16
16~20
16~20
16~20
X-groove
butt welding
16~20
20~22
16~20
20~22
55
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