PETRONAS GAS BERHAD (PGB) GAS TRANSMISSION & REGASIFICATION (GTR) – PRESSURE RELIEF DEVICE (PRD) CONTINGENCY ANALYSIS WORKSHOP FOR LIQUID LINE (KERTEH, KUANTAN & GURUN)

Abstract

ABSTRACT This project explores whether some of the Pressure Relief Devices (PRDs) installed on PETRONAS Gas Berhad’s liquid transmission pipelines can be safely removed to cut down on maintenance costs. PRDs play a key role in preventing dangerous pressure build- up but maintaining them across a vast pipeline network can be costly. Following the success of earlier studies that showed certain PRDs in gas pipelines were no longer needed, this study examines if the same approach can work for liquid pipelines. We focused on 64 PRDs located at scrapper and metering stations across the Peninsular Gas Utilization (PGU) pipeline network. By reviewing historical pressure data and assessing various overpressure scenarios like blocked outlets, external fires, and temperature changes, we aimed to determine if these safety devices are still necessary. Our findings indicate that the risk of overpressure is minimal, thanks to the design of the pipeline system, which naturally controls pressure through the discharge limits of compressors and pumps. The study concludes that discontinuing certain PRDs in low-risk areas could lead to significant cost savings without compromising safety, as long as the existing integrity programs and regular inspections continue. These insights could help PGB GTR streamline its operations and focus resources on more critical areas, ensuring a safe and efficient pipeline system for the future.