Analisis Tegangan Pipa Existing Pada Pompa Injeksi Line Discharge Akibat Desain Ulang Peletakan Support

Abstract

The existing discharge pipe line system was designed for a temperature of 200°F and a pressure of 1360 psig, while the operating condition is at 86°F and 600 psig. Due to the impact of a landslide, support points 4, 2, 7, 6, and 8 failed to function properly, based on isometric data. Analysis results showed a sustained stress of 200,415.1 lb/in², which significantly exceeds the allowable stress of 20,000 lb/in², with displacement values of DX = -58.331 in, DY = 132.987 in, and DZ = -0.0026 in. Therefore, a redesign of the support spacing using resting-type pipe support was necessary, following the existing piping layout by using the calculation method for the allowable distance between supports which has a maximum distance of 3.27 meters. After the redesign, the sustained stress was reduced to 13,812.7 lb/in², a ratio of 69.1% to the allowable stress, and expansion thermal stress was 4,486.0 lb/in², with a ratio of 10.2%. Displacement values were reduced to DX = -0.0246 in, DY = 0.3128 in, and DZ = 0.0987 in. Therefore, new design is considered safe and suitable for fabrication.