Analisis Pengaruh Ketebalan Pipa Terhadap Effective Stress Pada Desain Buried Pipe Tie-In Crossing Highway

Abstract

In Plant Expansion Projects, the Tie-In process is often encountered, where the Tie-In
process itself is a process of connecting one system to a new system. The Tie-In process itself has
challenges where the road from the old system to the new system is limited, so the design of the Tie-In
connection itself must be considered carefully. From these problems we are required to obtain a
piping system design that complies with the codes and standards used for the Underground Pipe
Crossing Highway. In this case, we will design and compare the buried pipe design and the concrete
encasement design. For material selection, the minimum wall thickness value was obtained at
1.42875 mm, so ASTM A53 Gr.B with Sch.20 material with the appropriate thickness was used. In this
case, a depth of 1.5 meters below the ground surface is used which is in accordance with the
minimum depth in the API 1102 standard. In this condition the pipe must be designed to be able to
withstand all kinds of loads such as dead load, live load and internal load. From this load, the stress
that occurs in the pipe must not exceed the allowable ASME B31.4 and API 1102. For the
aboveground pipe segment, providing support to prevent excessive stress on the pipe produces an
allowable pipe span of 13.1232 meters for the maximum distance between supports.