D3 Teknologi Geomatika

Permanent URI for this collectionhttps://repository.polibatam.ac.id/handle/PL029/1767

Browse

Now showing 1 - 2 of 2

DIMENSIONAL CONTROL FOR ASSEMBLY NODE STRUCTURE CELLAR DECK MODULE OIL AND GAS PLATFORM (Studi Kasus: North Field Expansion Project NXFP – Offshore QatarGas, PT. Mcdermott Indonesia)
(2023-12-19) Fajri, Rahmat; Corrie, Rachel; Aji, Satriya Bayu
PT. McDermott Indonesia is a company engaged in fabricating Oil and Gas platforms for the manufacture of offshore platforms. Currently, one of the ongoing projects is the NXFP project which amounts to 9 modules. In this research, the author took a crucial research subject from a module, namely the Leg Deck which is an assembly of starplates and tubullar which will be placed on the Cellar Deck. The creation of Le g Decks in the NXFP project has dimensional tolerance standards that must be followed in order to achieve the specified dimensional quality. In an effort to minimize errors in Assembly activities, there is a Quality Dimensional Control department whose duty is to inspect dimensions (sizes) and ensure the results of the Assembly between Tubular and Starplate in accordance with the tolerances that have been given. Dimensional inspection is carried out using the Leica TS 11 Total Station tool which has accurate accuracy. Measurement begins with making reference points as a mapping control framework in terms of measuring object dimensions then making inspection coordinate points on objects. In the dimension calculation stage using Bestfit software which serves to assist in the calculation process. The results of the long seam review are used as a reference in the assembly process and the results of measuring and processing tubullar and starplate produce length, levelness and ovality of objects which are then adjusted to the tolerances contained in the Dimensional Control Procedure Project soas to determine the acquisition of Assembly measurements between Tubullar and Starplate which is then poured in the form of a dimensional deviation report using AutoCAD Civil 3D 2023 software.
(Measuring Saddle Pressure Vessel Dimensions with Conditions Before and After the Welding Process on the Project (Case Study: Accommodation Platform))_Alfiansyah Triezky Ramadhani Yutisyo_3322111009_&_Fitra Kurnia Raya_3322101037
(2024-05-17) Yutisyo, Alfiansyah Triezky Ramadhani; Raya, Fitra Kurnia; Aji, Satriya Bayu
A pressure vessel can be defined as a container that experiences both external and internal pressure due to the weight of the fluid it contains. To withstand the external pressure exerted on the pressure vessel, a saddle pressure vessel is required as a support. The placement of the saddle pressure vessel plays a crucial role in reducing the external load or force caused by the weight of the fluid being held (Novian Rizky, Miftachul Munir, and Indrawan, 2023). Welding itself generates tensile forces due to softening during the welding process, resulting in displacement values (Nishimura, 2021). This study aims to determine the influence of welding on the displacement values to prevent the pressure vessel from receiving excessive loads using a Leica 16 total station. The method involves collecting measurement data using the total station, followed by calculations comparing the coordinates before and after the welding process to determine the significant level of displacement that occurs. Monitoring results indicate that the displacement values of the saddle pressure vessel are relatively small, with the displacement values on the X-axis = -0.0008, Y-axis = -0.0004, and Z-axis = -0.0007, indicating that there are no significant changes occurring in the saddle pressure vessel after welding, or it can be said that the saddle position tends to be stable.