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RESEARCH PAPERS

Application of an Enhanced RBI Method for Petrochemical Equipments

[+] Author and Article Information
Sang-Min Lee, Yoon-Suk Chang, Jae-Boong Choi

SAFE Research Center, School of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu, Suwon, Kyonggi-do 440-746, Korea

Young-Jin Kim1

SAFE Research Center, School of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu, Suwon, Kyonggi-do 440-746, Koreayjkim50@skku.edu

1

Corresponding author.

J. Pressure Vessel Technol 128(3), 445-453 (Jul 01, 2005) (9 pages) doi:10.1115/1.2218350 History: Received June 13, 2005; Revised July 01, 2005

The American Petroleum Institute guideline provides a methodology for calculating the risks of equipments installed in refineries or petrochemical plants. However, especially in connection with consequence analysis, there are limitations of its direct application to petrochemical plant. As a principal cause, only representative material is recommended for the risk evaluation while the equipment contains numerous materials. The objectives of this paper are to propose an enhanced risk-based inspection (RBI) method to resolve above shortcomings and to assess the risks of typical petrochemical equipments. In this respect, a RBI program including a material management database is developed to fully incorporate the characteristics of different materials. The proposed program consists of qualitative, semi-quantitative, and quantitative evaluation modules in which representative material, as well as toxic materials, is selected automatically for comparison to those getting from the current guideline. It has been applied to assess the risks of major equipments in ethylene facility such as vessel and column. Thereby, realistic evaluation results were obtained and applicability of the proposed RBI program was proven.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

Risk evaluation process of the qualitative, semi-quantitative, and quantitative RBI approaches based on API code

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Figure 2

RBI process based on ASME code

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Figure 3

COF estimation process of the proposed semi-quantitative method

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Figure 4

Initial screen of interface program to the material management database

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Figure 5

Three-tier structure of the proposed RBI program

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Figure 6

Result screens of proposed RBI program: (a) the qualitative module, (b) the semi-quantitative module, and (c) the quantitative module

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Figure 7

Schematic drawings of typical major equipments in petrochemical plant: (a) column and (b) vessel

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Figure 8

Risk assessment results of columns using semi-quantitative and quantitative RBI modules: (a) semi-quantitative risk matrix using API 581 method, (b) semi-quantitative risk matrix using the proposed method, and (c) quantitative results using the proposed method

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Figure 9

Risk assessment results of vessels using semi-quantitative and quantitative RBI modules: (a) semi-quantitative risk matrix using API 581 method, (b) semi-quantitative risk matrix using the proposed method, and (c) quantitative results using the proposed method

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