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Design Data: 4" Weldolet Calculation

This document calculates the requirements for a 4-inch weldolet. It provides the design pressure, temperature, material specifications, and pipe thickness calculations. It determines that a 4-inch Schedule 80 weldolet would be sufficient to meet the design conditions of 1319.5 psig and 176°F based on correlations shown in Table 1 of MSS-SP-97.

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913 views2 pages

Design Data: 4" Weldolet Calculation

This document calculates the requirements for a 4-inch weldolet. It provides the design pressure, temperature, material specifications, and pipe thickness calculations. It determines that a 4-inch Schedule 80 weldolet would be sufficient to meet the design conditions of 1319.5 psig and 176°F based on correlations shown in Table 1 of MSS-SP-97.

Uploaded by

grabetty
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as XLSX, PDF, TXT or read online on Scribd
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4" WELDOLET CALCULATION

1. Design Data
P Design Internal pressure 1319.5 psig UG-21
T Design Temperature 176 °F UG-20
C Internal Corrosion allowance 0.063 in UG-25
Do Pipe external diameter ( 4") 4.5 in
Weldolet Material SA 105 UCS-23
Sc Weldolet Allowable Stress 20000 psig ASME II Part. D
Shell Material SA -106 Gr. B UCS-23
Sb Shell Allowable Stress 17100 psig ASME II Part. D
E Efficiency (seamless pipe) 1
2. PipeThickness
t pipe minimum thickness 0.145 in 3.67 mm
App 1-1(a)(1)UG-44

treq minimun thickness + corrosion 0.208 in 5.27 mm


Pipe of 4" Sch 80 (o Sch XS) 0.337 in ASME B.36.10
Fabrication mill 0.125 %
Thickness with fabrication mill 0.295 in 7.49 mm

The Tabla 1 from SME B.36,10M-2015 (see below) shows the correlation between fittings and pipe wall.
One pipe de 4" Sch 80 correlates with a Weldolet of 4" Sch 80 (or extra strong)
3. Conclusion
It would be enough to choose one Weldolet 4" Sch 80 according TABLE 1 (from MSS-SP-97) for design
pressure and temperature of 1319,5 psig (92,2 kg/cm2)and 176°F (80°C)

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