Unequal lateral tee branch formula pdf
4″ Header OD = 114 mm
3″ ID = 88 mm, ½ ID = 44 mm
Degree = 45°
16 Center Line = 360° ÷ 16 = 22.5°
Branch Pipe Center Line Marking Layout
Cutback Formula :
(Header½ OD – √(Header½OD² – (Sin(θ) × Branch½ID)²)) ÷ Sin(Degree) + Branch ½ID(1-Cos(θ)) ÷ Tan(Degree)
22.5= (57 – √(57² – (Sin(22.5°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(22.5°)) ÷ Tan(45°) = 6.94 mm
45° = (57 – √(57² – (Sin(45°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(45°)) ÷ Tan(45°) = 22.95 mm
67.5° = (57 – √(57² – (Sin(67.5°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(67.5°)) ÷ Tan(45°) = 51.26 mm
90° = (57 – √(57² – (Sin(90°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(90°)) ÷ Tan(45°) = 73.36 mm
112.5° = (57 – √(57² – (Sin(112.5°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(112.5°)) ÷ Tan(45°) = 84.94 mm
135° = (57 – √(57² – (Sin(135°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(135°)) ÷ Tan(45°) = 88.18 mm
157.5° = (57 – √(57² – (Sin(157.5°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(157.5°)) ÷ Tan(45°) = 88.24 mm
180° = (57 – √(57² – (Sin(180°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(180°)) ÷ Tan(45°) = 88 mm
202.5° = (57 – √(57² – (Sin(202.5°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(202.5°)) ÷ Tan(45°) = 88.24 mm
225° = (57 – √(57² – (Sin(225°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(225°)) ÷ Tan(45°) = 88.18 mm
247.5° = (57 – √(57² – (Sin(247.5°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(257.5°)) ÷ Tan(45°) = 84.94 mm
270° = (57 – √(57² – (Sin(270°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(90°)) ÷ Tan(45°) = 73.36 mm
292.5° = (57 – √(57² – (Sin(292.5°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(292.5°)) ÷ Tan(45°) = 51.26 mm
315° = (57 – √(57² – (Sin(90°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(315°)) ÷ Tan(45°) = 25.95 mm
337.5° = (57 – √(57² – (Sin(337.5°) × 44)²)) ÷ Sin(45°) + 44(1-Cos(337.5°)) ÷ Tan(45°) = 6.94 mm
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