焊接坡口形式英文版.doc

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Welding Grooves’Forms and Types G**-*****
Scope
This document defines tlding
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；
AOVS
AOVN
10≤t≤25
(A,B,AH,D,DH)
— Backing required；
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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;
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）
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SOVS
SOVN
65≤t≤100
— Backing required；
— Semi-auto welding one-pass firstly, then auto-welding;
（CO2+SAW）
Table 5（Continued）
Process
Code
Sketch
Applicable plate
Note
Both-side auto welding
CI
5≤t≤7
— No back gouging；
— Used for A，B，AH32，AH36 steel。
CVS
CVN
10≤t≤38
Back gauging.
C1/2VS
C1/2VN
5≤t≤60
—Back gauging.
—When welding SO1/2V and the root space is not enough, repairing required.
5＜t≤19
—No back gauging when fillet welding.
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