Session: OAC-06-02 Continued Safe Operation of Existing Assets - 2

Paper Number: 105780

105780 - Corrosion Rate Determination of Heat Exchanger Tubes 

Abstract

Purpose –The purpose of this paper is to review the impact of sampling inspection to heat exchanger tube remaining life. In sample inspection, we need a margin when calculating the residual life. From this point of view, the paper also contains the result of comparing data case analysis.

Design/ methodology/ approach – The paper uses extreme analysis, case-study, and data comparisonanalysis about each turn around case. We utilize data from actual tube inspection results.

Findings – The insights obtained through extreme interpretation are as follows. In sample inspection, data trend follows an extreme value distribution rather than a normal distribution. Also, It was confirmed that the margin value applied to the IRIS inspection quantity was reasonable.

Research Limitations/ implications – IRIS inspection accuracy is high, but it may vary depending on the inspector who operates it. In the past, not enough data has been obtained in the longitudinal direction of the tube.

Originality/ value – Corrosion rate of heat exchanger tubes is an essential factor in calculating residual life. And these calculation process will be used on Non-destructive testing(NDE) by system, which are being developed later in GS Caltex.

Keywords Tube Inspection, Sampling Inspection, IRIS, Extreme Analysis, Corrosion data

Paper Type Case Study

Presenting Author: Lee Junhang GS Caltex

Presenting Author Biography: 1) Years and experience : 1 year in GS Caltex Reliability Planning

2) Education : Bachelor of Mechanical Engineering, 2022, Kyung Hee University, Republic of Korea

Authors:

Lee Junhang GS Caltex
Eui Jong Yoo Gs caltex
Hyun Woo Kim Gs caltex