Analysis on the Leakage of the Flange Connection of the Water-Containing Hydrofluoric Acid Pipeline

Leakages of bolted pipe flange connections of water-containing hydrofluoric acid pipelines were frequently reported by the extraction section in the fluorine chemical industry. Water-containing hydrofluoric acid can cause severe injuries to human beings due to its strong causticity. The water-contai...

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Autores principales:	Kun Lu, Junhua Dong, Aoqing Zhang, Bingjun Gao
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hydrofluoric acid stress analysis of pipeline pipe flange connections leakages Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/16f59de01d654060a825f464b6fc6c23
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spelling	oai:doaj.org-article:16f59de01d654060a825f464b6fc6c232021-11-25T18:51:15ZAnalysis on the Leakage of the Flange Connection of the Water-Containing Hydrofluoric Acid Pipeline10.3390/pr91119862227-9717https://doaj.org/article/16f59de01d654060a825f464b6fc6c232021-11-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/1986https://doaj.org/toc/2227-9717Leakages of bolted pipe flange connections of water-containing hydrofluoric acid pipelines were frequently reported by the extraction section in the fluorine chemical industry. Water-containing hydrofluoric acid can cause severe injuries to human beings due to its strong causticity. The water-containing hydrofluoric acid pipe was a short lined pipe, so a lot of flange connections and supports were adopted in the pipeline. In this paper, the finite element models of the pipeline were established to analyze the internal force of the pipeline under conditions including internal pressure, temperature, self-weight, and so on. Based on this, the equivalent design pressure of the flange connections was determined. The results of the stress analyses of the pipeline showed that leakages were mainly caused by a large bending moment, due to the unreasonable layout of the piping supports under self-weight. When the pipeline was supported on the beam of the pipe gallery, which is not necessarily beneficial to reduce the bending moment of the pipeline, and the flange connection was close to the supporting beam at the same time, leakages frequently occurred in this flange connection. To support the pipeline reasonably, the flange connection should be placed at zero bending moment positions. Therefore, the positions with zero bending moments of the pipeline with equal and unequal spacing supports were obtained under gravity load, to provide a basis for the rational support of lining piping.Kun LuJunhua DongAoqing ZhangBingjun GaoMDPI AGarticlehydrofluoric acidstress analysis of pipelinepipe flange connectionsleakagesChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 1986, p 1986 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hydrofluoric acid stress analysis of pipeline pipe flange connections leakages Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	hydrofluoric acid stress analysis of pipeline pipe flange connections leakages Chemical technology TP1-1185 Chemistry QD1-999 Kun Lu Junhua Dong Aoqing Zhang Bingjun Gao Analysis on the Leakage of the Flange Connection of the Water-Containing Hydrofluoric Acid Pipeline
description	Leakages of bolted pipe flange connections of water-containing hydrofluoric acid pipelines were frequently reported by the extraction section in the fluorine chemical industry. Water-containing hydrofluoric acid can cause severe injuries to human beings due to its strong causticity. The water-containing hydrofluoric acid pipe was a short lined pipe, so a lot of flange connections and supports were adopted in the pipeline. In this paper, the finite element models of the pipeline were established to analyze the internal force of the pipeline under conditions including internal pressure, temperature, self-weight, and so on. Based on this, the equivalent design pressure of the flange connections was determined. The results of the stress analyses of the pipeline showed that leakages were mainly caused by a large bending moment, due to the unreasonable layout of the piping supports under self-weight. When the pipeline was supported on the beam of the pipe gallery, which is not necessarily beneficial to reduce the bending moment of the pipeline, and the flange connection was close to the supporting beam at the same time, leakages frequently occurred in this flange connection. To support the pipeline reasonably, the flange connection should be placed at zero bending moment positions. Therefore, the positions with zero bending moments of the pipeline with equal and unequal spacing supports were obtained under gravity load, to provide a basis for the rational support of lining piping.
format	article
author	Kun Lu Junhua Dong Aoqing Zhang Bingjun Gao
author_facet	Kun Lu Junhua Dong Aoqing Zhang Bingjun Gao
author_sort	Kun Lu
title	Analysis on the Leakage of the Flange Connection of the Water-Containing Hydrofluoric Acid Pipeline
title_short	Analysis on the Leakage of the Flange Connection of the Water-Containing Hydrofluoric Acid Pipeline
title_full	Analysis on the Leakage of the Flange Connection of the Water-Containing Hydrofluoric Acid Pipeline
title_fullStr	Analysis on the Leakage of the Flange Connection of the Water-Containing Hydrofluoric Acid Pipeline
title_full_unstemmed	Analysis on the Leakage of the Flange Connection of the Water-Containing Hydrofluoric Acid Pipeline
title_sort	analysis on the leakage of the flange connection of the water-containing hydrofluoric acid pipeline
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/16f59de01d654060a825f464b6fc6c23
work_keys_str_mv	AT kunlu analysisontheleakageoftheflangeconnectionofthewatercontaininghydrofluoricacidpipeline AT junhuadong analysisontheleakageoftheflangeconnectionofthewatercontaininghydrofluoricacidpipeline AT aoqingzhang analysisontheleakageoftheflangeconnectionofthewatercontaininghydrofluoricacidpipeline AT bingjungao analysisontheleakageoftheflangeconnectionofthewatercontaininghydrofluoricacidpipeline
_version_	1718410633515368448

Analysis on the Leakage of the Flange Connection of the Water-Containing Hydrofluoric Acid Pipeline

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