Welded Branch (Tees) (ASME B31.12 par. IP-3.4.2)
Design conditions
Project name
Design pressure
P = [MPa]
Design temperature
T = [°C]
Material
Name
Basic allowable stress
S = [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
Quality factor
E = [-]
Material performance factor
Mf = [-]
Mechanical allowances
c = [mm]
Manufacturer's thickness tolerance
Mill = [%]
Coefficient
Y = [-]
Condition (P/SE ≤ 0.385)
-
Wall thickness
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 β between the pipe and branch is at least 45°
β = [deg.]
Effective length removed from pipe at branch
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
A1 = [mm2]
Reinforcement area in pipe wall
A2 = [mm2]
Reinforcement area in branch wall
A3 = [mm2]
Reinforcement area in added metal
A4r = [mm2]
Reinforcement area in welds
A4w = [mm2]
Total reinforcement area
A5 = [mm2]
Percentage area replacement
(A5 / A1).100% = [%]
-