ANALISA KERUSAKAN WATERWALL TUBE BOILER PADA PEMBANGKIT LISTRIK TENAGA UAP 150 MW

PERKASA, LUGANTHA and Mataram, Agung and Irsyadi, Yani (2021) ANALISA KERUSAKAN WATERWALL TUBE BOILER PADA PEMBANGKIT LISTRIK TENAGA UAP 150 MW. Master thesis, Sriwijaya University.

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Abstract

A Steam Power Plant (PLTU) that uses an environmentally friendly type of boiler, namely the CFB (Circulating Fluidized Bed) type boiler. Failure of the boiler pipe has a big impact on the process or the losses it causes. This study will analyze the failures that occur in the boiler tube waterwall of Pembangkit Listrik Tenaga Uap (PLTU) 150 MW which suffered damage by testing chemical content, hardness test, tensile test, metallographic testing, and Scanning Electron Microscopy (SEM) testing. The test results show that the chemical composition contained in the boiler tube waterwall still complies accordance with the standards. Then the mechanical properties of watertube boilers are still in accordance with the standards. Leaks that occur in pipes predicted caused by welding failure. So the failure of weld make creeping cracks and causing fatigue so that the damage begins with thermal fatigue which causes cracks in certain weld seams. These open cracks produce leaks which cause the discharge of high velocity fluids which hit adjacent surfaces creating an 'erosion' failure which then results in thinning of the walls of the tube. The thinning of the walls then causes another leak. Therefore, a series of erosions occurred which resulted in several leaks. The fact is that the failure is preferably located in the area of the weld seam which makes it the root cause of the failure.

Item Type: Thesis (Master)
Uncontrolled Keywords: Tube Air Boiler, Kelelahan termal, Kebocoran, Erosi
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ1-1570 Mechanical engineering and machinery
Divisions: 03-Faculty of Engineering > 21101-Mechanical Engineering (S2)
Depositing User: Users 2476 not found.
Date Deposited: 19 Nov 2021 07:59
Last Modified: 19 Nov 2021 07:59
URI: http://repository.unsri.ac.id/id/eprint/57691

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