30 Oct 2021

On-Shore Flowline Design and River-Crossing Analysis with Horizontal Directional Drilling Method in North Kalimantan

Alexander B. Pradanto 1 dan Rildova 2
1, 2 Program Studi Teknik Kelautan
Fakultas Teknik Sipil dan Lingkungan
Institut Teknologi Bandung
Jl Ganesha 10 Bandung 40132, Indonesia
1 apradanto@gmail.com, 2 rildova@ocean.itb.ac.id

Abstract: Flowline is a pipeline system which transmits fluids from wellhead to production facility. Pipeline is designed with the proper standards and codes. The designed pipeline is a gas flowline from the SSB-9 well head to the gas processing facility in South Sembakung, North Kalimantan, a forest area route, that needs to cross the Tanjung Keramat river. In this thesis, the wall thickness is designed by the ASME B31.8 code with 3 design condition: installation, hydrotest, and operating condition. Buckling and ovality are also checked in this paper with ASCE: Design for Buried Steel Pipes (ALA). With the help of CAESAR II 2014 software, stress analysis will be checked every segment along the flowlines. The result for the 6-inch flowlines, that used API 5L X52 – PSL 2 Grade, needs 5.56 mm of wall thickness. The designed cladding is SS304 with 2 mm of thickness and the designed external corrosion coating is 3LPE with 2.7 mm of thickness. The flowlines are calculated fulfil the stress analysis for ASME B31.8 and ASCE. The calculated expansion is around 31.011 mm for conservative analysis. With Rig JT24 and 10-inch Reamer, the HDD installation can be done and already qualify for stress checking.

Keywords: Flowline, Pipeline, River Crossing, ASME B31.8, ASCE 108, Buried Steel Pipes, Horizontal Directional Drilling.