Welded Branch (Tees) (ASME B31.1 par. 104.3.1(d))
Design conditions
Project name
Design pressure
P = [MPa]
Design temperature
T = [°C]
Material
Name
Maximum allowable stress
SE = [MPa]
Component geometry
Pipe
Diameter
Dh = [mm]
Thickness
tnh = [mm]
Branch
Diameter
Db = [mm]
Thickness
tnb = [mm]
Reinforcement
Thickness
tr = [mm]
Width
wr = [mm]
Factors/Tolerances
Weld joint factor
W = [-]
Additional thickness
A = [mm]
Manufacturer's thickness tolerance
Mill = [%]
Coefficient
y = [-]
Wall thickness (per para 104.1.2)
Pipe
Minimum wall thickness
Th = [mm]
Pressure design thickness
th = [mm]
Branch
Minimum wall thickness
Tb = [mm]
Pressure design thickness
tb = [mm]
Nomenclature
The angle α between the pipe and branch is at least 45°
α = [deg.]
Inside dimension of the branch opening in the run of the pipe
d1 = [mm]
Half width of reinforcement zone
d2 = [mm]
Height of reinforcement zone outside of run pipe
L4 = [mm]
Min. throat dim. of weld at branch periphery
Wb = tc = [mm]
Min. throat dim. of weld at outer edge of added reinforcement
Wo = [mm]
Results
Required reinforcement area
A7 = [mm2]
Reinforcement area in pipe wall
A1 = [mm2]
Reinforcement area in branch wall
A2 = [mm2]
Reinforcement area in welds
A3 = [mm2]
Reinforcement area in added metal
A4 = [mm2]
Total reinforcement area
ΣA = [mm2]
Percentage area replacement
(ΣA / A7).100% = [%]
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