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Saddle/Branch Connection
Weld
Calculator
Calculate saddle and branch connection weld sizes per ASME B31.3 Fig 328.5.4
Input Parameters
Header OD (in)
Header Wall (in)
Branch OD (in)
Branch Wall (in)
Connection Type
Set-On (Saddle)
Set-In (Insert)
Weldolet/Olet
Calculate
Results
--
Min Fillet Weld Size
in
--
Min Fillet Weld Size
mm
--
Throat Required
in
--
Opening in Header
in
Note:
Branch connection welds per ASME B31.3. Full pen groove weld with reinforcing fillet is standard practice.
Reference
ASME B31.3 Fig 328.5.4: Min fillet = max(6mm, 0.7 x t_branch) Throat = 0.707 x leg size Full penetration groove weld + cover fillet typically required