INSUFFICIENTWELDTIME
EXCESSIVEWELDPITTING
METALDISCOLOURATION
UNDERSIZEDWELDS
DEEPINDENTATION
POORLYPREPPED
OVERPRESSURE
DIRTYSURFACE
HEATBUILDUP
SHUNTING
X
U
O
N
I
N
M
I
O
E
H
E
A
T
B
U
I
L
D
U
P
Y
X
Y
O
U
Z
X
G
N
X
D
I
F
G
N
I
Z
J
A
A
E
V
A
D
O
V
U
S
B
N
S
O
B
I
N
N
O
T
Q
Q
B
U
U
S
V
C
X
E
E
T
E
I
U
P
A
E
O
U
L
O
O
I
N
B
R
A
A
Y
D
R
A
A
B
T
F
E
A
G
I
O
V
P
U
T
F
M
A
N
I
U
O
P
U
I
I
T
F
P
V
Y
T
P
O
O
V
E
W
A
H
E
O
X
J
R
N
E
J
I
I
B
I
Z
A
B
W
C
X
I
X
E
E
I
W
I
N
E
D
M
Z
P
C
Y
U
O
T
G
D
V
L
G
E
Q
L
U
F
K
Y
S
E
I
E
D
I
B
N
E
N
E
W
N
N
Q
M
U
D
Q
W
G
Q
S
R
O
C
L
E
I
W
W
E
A
M
P
M
R
J
U
O
A
P
O
A
U
S
T
A
E
N
O
Z
I
D
O
O
Z
M
W
A
U
L
D
Z
V
V
R
I
F
F
W
T
D
G
I
N
E
B
K
I
P
S
Q
P
I
W
L
I
E
Z
B
R
E
W
A
Z
J
I
Y
M
F
A
E
I
N
I
L
Z
X
I
C
E
E
U
V
E
N
N
E
P
R
S
I
B
S
P
H
S
H
V
D
V
S
D
W
S
I
L
H
B
C
E
A
I
H
C
A
A
C
M
P
W
F
T
N
W
O
Y
S
D
K
Z
K
E
B
I
H
I
O
H
S
E
D
B
H
E
A
E
A
T
S
T
O
E
J
D
C
I
E
G
F
O
A
A
Z
T
N
U
U
L
O
R
E
I
A
D
O
W
R
R
R
K
Z
U
U
E
U
L
R
S
M
D
A
I
C
M
T
Z
U
L
G
I
Q
D
U
R
J
A
M
U
O
L
H
S
W
D
X
E
O
P
T
Q
G
I
G
E
P
S
R
A
O
U
P
E
E
P
H
B
E
P
O
O
R
L
Y
P
R
E
P
P
E
D
N
O
M
E
T
A
L
D
I
S
C
O
L
O
U
R
A
T
I
O
N
O
I
J
