Failure Analysis of Shaft Circulating Water Pump (CWP) used in Power Plant

Abdul Hamid,Khaeroman Khaeroman,Gunawan Dwi Haryadi,Sri Nugroho,B.H Setiadji,A.L Han,J.U.D Hatmoko,A Widodo,J.D Setiawan,O Kurdi

doi:10.1051/matecconf/201815902027

Abdul Hamid, Khaeroman Khaeroman + Show 8 more

Open Access

https://doi.org/10.1051/matecconf/201815902027

Copy DOI

Journal: MATEC Web of Conferences	Publication Date: Jan 1, 2018
Citations: 3	License type: CC BY 4.0

Affiliation: Diponegoro University

Abstract

Pump shafts are generally exposed to the liquid being pumped either on a continual basis or at certain locations along the length of the shaft. The shaft material is austenitic stainless steel, description ASTM AU 79 TY 316. The purpose of this study is to determine the failure of the water pump shaft used in the power plant. Metallography is the study of structure metal shaft can used as a means for CWP metal pelleting (Circulating Water Pump), for the purpose of damaged or deeply degraded areas. SEM test is used to know the beginning of the crack (crack initiation). EDS test is used to chemical composition and Vikers hardness test is also used to know the hardness material. These three tests to support in analyzing the failure of the pump shaft. The conclusion of this failure analysis is the shaft material has porosity. Fatigue cracking comes from the outer surface area.

Highlights

Pump shafts are generally exposed to the liquid being pumped either on a continual basis or at certain locations along the length of the shaft [1]
This study investigated the failure analysis of a rotating shaft of a circulating water pump injection, located in an power plan
Visual examination of the failed end gave the appearance that the shafts of CWP failed by fatigue

Summary

Introduction

Pump shafts are generally exposed to the liquid being pumped either on a continual basis or at certain locations along the length of the shaft [1]. The pump shaft usually occurs degradation due to corrosion and or mechanical degradation, usually in the form of fatigue failure. In many cases corrosion precedes fatigue failure and can accelerate the rate of failure [1]. The most common cause of failure on pump shafts is fatigue [1]. Fatigue failures on centrifugal shafts are most commonly of the rotating-bending type. Schematic diagrams of the various fractures, which can be expected from rotating bending conditions, are presented in Fig. 1[2].

Objectives

Discussion

Conclusion