Specifications

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BOSS ARC 140VRD、160VRD Operating Manual
6.05 Shielding gas selection
Alloy Shielding gas
Aluminium & alloys Argon
Carbon steel Argon
Stainless steel Argon
Nickel alloy Argon
Copper Argon
Titanium Argon
Table 10 Shield gas selection
6.06 TIG welding parameters for low carbon & low alloy steel pipe
Tungsten type &
diameter
Current range DC
(Amperes)
Filler rod for root pass Joint preparation
Thoriated 2%
3/32” (2.4mm)
120— 170 Yes
Thoriated 2%
3/32” (2.4mm)
100— 160 Yes
Thoriated 2%
3/32” (2.4mm)
90— 130 No
Table 11 TIG welding parameters for low carbon & low alloy steel pipe
6.07 Welding parameters for steel
Base metal
thickness
(mm)
DC current
for mild
steel (A)
DC current
for stainless
steel (A)
Tungsten
diameter
(mm)
Filler rod
diameter (if
require) (mm)
Argon gas
flow rate
(litres/min)
Joint type
1.0
35— 45
40— 50
20— 30
25— 35
1.0 1.6 5— 7
butt/ corner
lap/ fillet
1.2
45— 55
50— 60
30— 45
35— 50
1.0 1.6 5— 7
butt/ corner
lap/ fillet
1.6
60— 70
70— 90
40— 60
50— 70
1.6 1.6 7
butt/ corner
lap/ fillet
3.2
80— 100
90— 115
65— 85
90— 110
1.6 2.4 7
butt/ corner
lap/ fillet
4.8
115— 135
140— 165
100— 125
125— 150
2.4 3.2 10
butt/ corner
lap/ fillet
6.4
160— 175
170— 200
135— 160
160— 180
3.2 4.0 10
butt/ corner
lap/ fillet
Table 12 DC TIG welding parameters