焊接坡口形式(英文版)
Welding Grooves’ Forms and Types GXX-XXXXX
1 Scope
This document defines the code of welding groove, chamfering and different kinds of grooves.
This document can be used for all structural welding joints.
2 Definitions of groove code
2.1 Butt joint
ABCD2EFG
Grads
Chamfered side(S or N)
C:Chamfer
Groove:direction of
2/3 groove
Groove direction:S or N
Groove type:I，V，1/2V，Y，X，K，DY( )
Welding process:O-One side welding
Welding process A:Automatic(SAW)
S:Combined(FCAW+SAW)
C:Semi-auto
E:Electro slag
G:Electo gas
F: FCB SAW
2.2 Fillet joint
Length of weldInverse indicated side
Throat of weldSpace between weldsRound welding
L-PTF.P60?
Indicated sideIndicated line
F: full-penetration fillet weld;
P: partial-penetration fillet weld.
1
GXX-XXXXX
3 Chamfering
If two base plates’ thickness are different, they should be constructed as Table 1.
Table 1 Chamfering details
Arrangement plan tNote
Section Plan
tCNatt1
SVS
La
— a=t1-t
— Chamfering CNatt1t1if a,3mm;
SVNa— L=3a;
L—The direction t1 of these
Lgrooves as
CSaI,1/2V,V,X, tt1
1，K ; tSVSt— Consider the thin plate,
aLwhen
aautomatic CSatt1
welding. SVN
L
t1tt1CSa CNatt1
SVN
L a
1
t1
GXX-XXXXX
4 Butt joint
When welding different grade materials, choose the easily constructed process.
4.1 Groove types for FCB SAW (See Table 2);
Table 2 Groove type for FCB SAW
Applicable Note Process Code Sketch plate
60??3?
t28?t,19
+1t10-0t1+1.53-0.5
50??3?
— Used for A，
19?t,24 B，D，AH32，
+10-0t1AH36 DH32，+1.53-0.5DH36 steel;
50??3?— Used for long
butt joint in
t2t2the panel 24?t,31 One-side FYS SAW flow line; +10-0t1— No back +1.55-0.5 gouging; 45???3
— Consider
t1,when t231?t,36 t125.5
F(xθ)13,t?25 Full-pen— F:weld Beveled 3,12※etration side firstly,(2/3t) welding t,25 n0,2x=2/3t (with backing) ，then
weld the other side
after removing the
backing;
—※when 0,3，no
backing required,
back gouging needed;
6 Groove type for Round bar.(See Table 8)
14
GXX-XXXXX
Table 8 Groove type for Round bar
Type Code Sketch Applicable range
40?
D
D,φ25
40?
Round 40?bar 1010
D
φ25?D?φ75
40?
30?
D,φ25 6
6Half D Round
Bar 40?10
φ25?D?φ75
D
15
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