Analisis Tegangan Pipa Dan Beban Nozzle Pada Discharge Pressure Vessel Akibat Beban Termal Tinggi

Abstract

The piping system in hydrocarbon fluid processing facilities operates under high pressure
and temperature, making it susceptible to internal stress and thermal loads that may affect the integrity
of pipes and equipment. The discharge pressure vessel line is classified as a critical line due to its
connection to static equipment and its role in transporting flammable and corrosive fluids. This study
aims to determine the number and placement of supports based on the maximum allowable span and
to evaluate pipe stresses from sustained, thermal, and occasional loads according to ASME B31.3. The
methodology involves collecting design data, modeling the piping system with pipe stress analysis
software, and verifying results against ASME B31.3. The analyzed pipe is ASTM A106 Grade B, with
a 4-inch diameter and Schedule 40. Calculations show a total system weight of 891.73 lb/ft and a
maximum allowable span of 14.397 ft, requiring at least four supports for a total length of 44.03 ft.
Stress analysis results indicate maximum sustained load stress of 3,923.87 psi (19.67% of allowable),
thermal expansion stress of 3,586.9 psi (7.4% of SA), and occasional load stress of 30.18 psi (0.11%
of allowable), confirming the system operates safely within design limits.