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Welding Grooves’Forms and Types GXX-XXXXX
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
Butt joint
Fillet joint
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3 Chamfering
If two base plates’ thickness are different, they should be constructed as Table 1.
Table 1 Chamfering details
Arrangement plan
Note
Section
Plan
a=t1-t
Chamfering if a＞3mm；
L=3a;
—The direction of these grooves as I,1/2V,V,X,，K ；
Consider the thin plate, when automatic welding.
4 Butt joint
When welding different grade materials, choose the easily constructed process.
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Groove types for FCB SAW (See Table 2)；
Table 2 Groove type for FCB SAW
Process
Code
Sketch
Applicable plate
Note
One-side SAW
FYS
8≤t＜19
Used for A，B，D，AH32，AH36 DH32，DH36 steel;
Used for long butt joint in the panel flow line;
No back gouging；
Consider t1,when t1<t2.
19≤t＜24
24≤t＜31
31≤t＜36
36≤t＜40
Groove types for Both-side SAW (See Table 3)；
Table 3 Groove types for Both-side SAW
Process
Code
Sketch
Applicable plate
Note
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Both-side auto
welding
AI
5≤t≤20
— No back gouging；
When t2－t1≤3mm, t2 is considered;
When t2－t1≤3mm, t1 is considered;
— When 5≤t≤13mm,
able to use for E,EH steel;
— When 5≤t≤18mm, able to be used for D,DH steel;
AYS
AYN
≤t≤
— No back gouging；
— When t1≤t2, t1 is considered。
ADYS
〔=AXS〕
ADYN
〔=AXN〕
＜t≤25
— No back gouging；
— ADYS〔or N〕，S，N refers to 1st W/D side。
25＜t≤75
ADY2S
ADY2N
＜t≤25
When ADYS〔or N〕failed