Uji Tekanan pada Sambungan Las Sistem Perpipaan Lepas Pantai Menggunakan Metode Tes Pneumatik

Abstract

This article presents a case study evaluating the integrity of weld joints in offshore piping systems through pneumatic pressure testing. This work was conducted on an offshore construction project where pressure testing was performed on an LNG piping system prior to commissioning. The testing process commenced with equipment preparation and nitrogen injection into the piping system until a test pressure of 11.5 barg was reached, followed by a 30-minute holding period and visual inspection of all weld joints using a bubble test. Additionally, this article discusses the importance of safety zone calculations and the selection of appropriate testing equipment to ensure worker safety and accurate results. The preparation of testing equipment, such as flanges, gaskets, and stud bolts, must adhere to flange management procedures to prevent leaks outside the tested system. The results indicated that all weld joints previously inspected were able to withstand the test pressure without any indication of leakage at the weld joints. This study demonstrates that pneumatic pressure testing is the most effective for verifying the weld joints of offshore piping systems with limited access.