GRA and AHP Analysis of Pneumatic Control Valve Failure in an LNG Plant
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RESEARCH ARTICLE-SYSTEMS ENGINEERING
GRA and AHP Analysis of Pneumatic Control Valve Failure in an LNG Plant Yuan Yang1 · Chuantao Xiao1
· Ye Yang2
Received: 31 May 2020 / Accepted: 7 October 2020 © King Fahd University of Petroleum & Minerals 2020
Abstract To analyse the causes of pneumatic valve failures in liquefied natural gas (LNG) plants, sort out the occurrence rules of failures and accurately perform failure prediction and spare parts inventory in engineering, this paper takes the damage frequency of key components of the pneumatic control valve, valve usage and instrument wind of the Kunlun Energy Hubei LNG plant from 2014 to 2019 as data samples. The Grey relational analysis model and analytic hierarchy process model are selected to perform unsupervised mathematical experiments. The results show that the faults of the pneumatic control valve can be decomposed into explicit faults, implicit faults and indirect faults. In engineering, attention should be paid to the sufficient inventory of key components of solenoid valves and positioners, and timely treatment should be administered when faults are found. In addition, targeted inspections should be regularly performed to reduce the frequency of dominant faults. At the same time, attention should be paid to the degree of damage caused by indirect faults, and regular monitoring of the water content and cleanliness of instruments should be conducted. The data of this mathematical experiment are well-coupled, and the accuracy of the model is controllable. However, the experiment shows that the basic data remain discrete. The next step should be to strengthen the data collection work, at the same time broaden the boundary of fault performance factors, and introduce data, such as the influence degree of the pneumatic control valve fault on the subordinate equipment, local process system, overall process system and its energy consumption. Standard analysis should be conducted in the process industry. Keywords GRA · AHP · Models · Pneumatic control valve · Fault
1 Introduction The pneumatic control valve is one of the industrial process control instruments widely used in industrial production. It is an important part of the industrial automation system and is used for water, steam, oil and gases and liquids in different media [1]. It has the advantages of a high adjustment precision, large adjustable range, emergency locking in the case of failure, safety and reliability, etc. An LNG plant is a kind of process industry. The production process requires precise control and strict leakage [2, 3]. Therefore, it is necessary to analyse the causes of pneumatic valve failures in a timely
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Chuantao Xiao [email protected]
1
Key Laboratory of Oil and Gas Resources and Exploration Technology, Ministry of Education, School of Geosciences, Yangtze University, Wuhan 430100, China
2
Jianghan Oil Production Plant, Jianghan Oil Field, Sinopec, Qianjiang 433123, China
manner in the production process, sort out the occurrence rules of failures, and guide the technic
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