Your case is a Incopmlete penetraion,
Welding reniforcement 3 mm, max allowed , 12 mm acceptable in the case.
2mm incomplete penetration acceptable depends upon codes, API 1104 OR ASME B31.3
AS PER API 1104 --- ACCEPTABLE refer API 1104 , CLASE 9.3.1
1.Inadequate Penetration (without High low) --- L > 1"
Ag.L1" (In any continuous 12"WL)
Ag.L>8% of WL (if WL < 12")
2.Inadequate Penetration (with High low)
L> 2" (50mm)
Ag.L > 3" (in any continuous 12" WL )
Pl refer table 341.3.2 acceptance criteria of welds
HOPE THIS INFORMATION WILL HELP YOU.
K.Muzip ur Rahuman.
Adinin Works Engg.
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