焊接坡口形式英文版.doc

文档介绍：-
. z.
Welding Grooves’Form
25＜t≤75
ADY2S
ADY2N
＜t≤25
When ADYS〔or N〕failed.
-
. z.
25＜t≤75
Groove types for one-side SAW(See Table 4)
Table 4 Groove types for one-side SAW
Process
Code
Sketch
Applicable plate
Note
One-side automatic welding
GVN
11≤t≤25
—Up-vertical position
Gt°=60°∽90°
Gh°=45°∽90°
Gt:Angle between the weld and the panel line of the welding plate;
Gh:Angle between the welding side and the panel;
—Simplified electric gas-arc welding)；
— When 11≤t＜14，not to be used for E, EH steel。
25＜t≤40
Thickness
A
r
40＜t≤50
25±5
50＜t≤60
8±2
AOI
5＜t≤10
One-side automatic welding with backing；
-
. z.
AOVS
AOVN
10≤t≤25
(A,B,AH,D,DH)
— Backing required；
GOVS
GOVN
7≤t≤25
(A,B,AH,D,DH)
— Used when AOVS failed;
— One-side automatic welding with backing；
Groove types for semi-auto welding(See Table 5)
Table 5 Groove types for semi-auto welding
Process
Code
Sketch
Applicable plate
Note
One-side semi-auto welding
COVS
COVN
5≤t≤100
One-side semi-auto welding with backing
COVS
COVN
25＜t≤140
—Used for the joint between cast steel and A，B，D，E steel;
—One-side semi-auto welding with backing;
— When t＜35mm，used e*cept
E steel。
CO1/2VS
CO1/2VN
5≤t≤60
One-side semi-auto welding with backing;
-
. z.
CO1/2VS
CO1/2VN
25＜t≤140
— Used for the joint between cast steel and A，B，D，E steel;
— Backing required；
— When t＜35mm，used e*cept
E steel。
SOVS
SOVN
5＜t＜65
— Backing required；
— Semi-auto welding one-pass firstly, then auto-welding;
—〔CO2+SAW〕
SOVS
SOVN
65≤t≤100
— Backing requir