Redesain Onshore Crude Oil Pipeline Di Penajam Station Dari Underground Menjadi Aboveground

Abstract

A new underground route will be installed, due to technical issues during construction
about existing underground pipes. A redesign was carried out to place the pipeline aboveground with
bend angle variations of 30°, 60°, and 90°. In this Thstudy, a comparison of the new designs with
different bend angles was conducted, including calculations and analyses covering allowable pipe
span, determination of the number of supports, stress values, and pipe flexibility values. From the
calculations and analyses performed, the allowable pipe span value for all three designs with varying
bend angles is 19.976 meters with two pipe supports. Stress analysis using software showed that the
highest stress value due to sustained load was found in the design with a 90° bend angle at 20,406.8
psi, while the lowest value was in the design with a 30° bend angle at 14,503.77 psi. The highest
stress value due to thermal expansion load was found in the design with a 30° bend angle at
12,125.15 psi, while the lowest value was in the design with a 90° bend angle at 1,145.8 psi. The pipe
flexibility calculation results showed that the highest flexibility value was in the 90° design at 105.79
mm, while the lowest value was in the 30° design at 26.45 mm. Based on the stress and flexibility
values analysis based on ASME B31.4, all three designs are declared safe and can proceed with the
installation process.