Redesain Pipa Dan Redesain Support Pipa Pada Sistem Perpipaan Line Outlet Condensate Pada Tank 190D-16 Akibat Tank Settlement

Abstract

The piping system in Crude Palm Oil (CPO) storage facilities is crucial for smooth
distribution and safe operation. A key challenge is soil settlement around tanks, which can
increase pipe stress and nozzle loads, risking overstress, deformation, or failure. Analysis of
the existing design with a simulated 160 mm settlement showed critical stress levels: sustain
loads peaked at 37.09 N/mm² (S4) and 24.54 N/mm² (S5), while thermal expansion loads
reached 2878.65 N/mm² (S1) and 2943.53 N/mm² (S3), far above allowable limits due to load
concentration at elbows. Although occasional loads were within limits, nozzle loads for Mx
and Mz exceeded standards at just 61.75 mm settlement, proving the design unsafe. This
study evaluates settlement impacts, determines safe pipe support spans, and proposes a redesign. Using
stress analysis software based on ASME B31.3 and API 650 standards, the redesign achieved
compliance with all limits: sustain and occasional stresses of 24.60 N/mm², and thermal expansion
stress of 129.91 N/mm² at node 650. The N4 190D-16 nozzle loads also met criteria, confirming the
redesigned system is safe under settlement of up to 160 mm over 25 years.