Failure analysis of natural gas pipes

Majid, Zulkifli Abdul; Mohsin, Rahmat; Yaacob, Zulkefli; Hassan, Zulkafli

doi:10.1016/j.engfailanal.2009.10.016

Cited by 103 publications

(44 citation statements)

References 8 publications

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“…In work [17] significant issues related to ensuring the safety of pipelines, through research methods and the improvement of the technical condition were presented. Such composition was also prescribed in [10,14,16,19] as to identify the most common failure causes in sciENcE aNd tEchNology addition to the existing design and construction data, as well as visual physical inspection. Nevertheless random character of failure occurrence makes analysis and assessment in this area very complex and based mainly on the analysis of operational data and implementation of methods and analysis of the failure mechanisms under real conditions as shown in works [9,22,25,32,33].…”

Section: Introductionmentioning

confidence: 99%

“…In work [17] significant issues related to ensuring the safety of pipelines, through research methods and the improvement of the technical condition were presented. Such composition was also prescribed in [10,14,16,19] as to identify the most common failure causes in TchórzewskA-cieślAk B, PieTruchA-urBAnik k, urBAnik M. Analysis of the gas network failure and failure prediction using the Monte carlo simulation method. eksploatacja i niezawodnosc -Maintenance and reliability 2016; 18 (2) …”

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confidence: 99%

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Analysis of the gas network failure and failure prediction using the Monte Carlo simulation method

Tchórzewska-Cieślak

Pietrucha-Urbanik

Urbanik

2016

EiN

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Article citation info: IntroductionIn the report of the Committee of Union Gas in the World Congress in Nice in 1972, the issue connected with the failure intensity of the gas network was presented. Operation of Gas Supply System is inseparably linked with the occurrence of the fire and explosion risk. Failures, explosions and fires long-term statistics conducted by the gas services and organizational units of the State Fire Service indicate that despite the continuous increase of the safety level of gas supply system and number of actions taken in this regard, still many failures are recorded, which often generate serious threat for the external and the inner environment of a man, as well as create risk for human health and life. The consequences of failures, during which the release and dispersion of natural gas occurs, depend on its type, nature and causes, as well as from the efficiency of its removal.Failure frequency evaluation in the operation of gas supply subsystem should be one of the priorities of the gasworks, which should attach greater importance to assess the proper functioning of the newly designed, as well as the implemented systems [31]. With the increasing pressure from the environmentalists and stricter standards for acceptable environmental pollution and structures vulnerability in terms of its protection, it seems to be a necessity [6,24,28]. The issue connected with failure gas pipeline analysis in perspective of improper design, construction and maintenance is presented in work [11], the increased failure affected by the lack or improper conduct of repairs and modernization, also incorrect or lack of risk management program. When planning renovations or modernization of gas networks the gasworks employees should make the classification of pipelines, that means determine which sections of the network require immediate repair, and which can be repaired later [7,15,26]. For this reason, making the appropriate maintenance (repair, renovation, replacement) only after the damage of the element may be irrational, control human intervention detects and removes faults being a potential source of failure. Widely used solution become the preventive renewals, aimed at reducing the loss of utility of a given element in different environment [4,8,21]. Very important from operator perspective is the failure reason [18,20,29], as well as modernizing actions that should be taken to avoid such undesirable situations. The strategy of the preventive renewals is to establish such timing of the renewals which will enable to achieve the maximum profitability of the project, through the use of the periodic strategies involving the renewals after a certain period of element operation [5,11]. Such classification can be made, for example, on the basis of failure prediction for certain sections of the gas network, using the Monte Carlo method [30,34]. The Monte Carlo methods include all proceedings aimed at finding approximate solutions of some problems (mathematical, technical or operational) [27]. The Monte Carlo ...

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Section: Introductionmentioning

confidence: 99%

“…In work [17] significant issues related to ensuring the safety of pipelines, through research methods and the improvement of the technical condition were presented. Such composition was also prescribed in [10,14,16,19] as to identify the most common failure causes in TchórzewskA-cieślAk B, PieTruchA-urBAnik k, urBAnik M. Analysis of the gas network failure and failure prediction using the Monte carlo simulation method. eksploatacja i niezawodnosc -Maintenance and reliability 2016; 18 (2) …”

mentioning

confidence: 99%

Analysis of the gas network failure and failure prediction using the Monte Carlo simulation method

Tchórzewska-Cieślak

Pietrucha-Urbanik

Urbanik

2016

EiN

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“…(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13) and (25)(26) have been applied to calculate the impingement probability on the target pipe and the final failure frequency of this pipe. The values obtained for both cases are shown in Table 3.…”

Section: Tablementioning

confidence: 99%

“…Mazzola [6] assessed the consequences of high pressure releases of flammable gas from different rupture sizes in two parallel natural gas pipelines. Other authors [7][8][9][10][11][12][13][14][15][16] have focused on the metallurgical failure analysis of specific accidents in pipelines, caused by the action of a high-pressure jet issuing from a source pipe and damaging a second one. Wang et al [17] analyzed the possible domino effect, in the event of the release from a pipeline, associated to thermal radiation, blast and ejected fragments.…”

Section: Introductionmentioning

confidence: 99%

Analysis of domino effect in pipelines

Ramírez-Camacho

Pastor

Casal

et al. 2015

Journal of Hazardous Materials

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Parallel pipelines are frequently installed over long distances, due to the difficulty in creating or maintaining the required corridor. This implies that a release in one pipeline can seriously affect another one. The main risks associated with this domino effect are the erosive action of fluid-sand jets and the thermal action of jet fires. In this paper a survey has been performed on the accidents that have occurred, and the diverse possibilities and the associated domino sequences are analysed. The probability of occurrence of this domino effect is a function of the location of the hole, the direction of the jet, the solid angle that the jet is outlining, the diameter of both pipelines, and the distance between them. A mathematical model has been developed to estimate this probability. The model shows how the probability of domino effect decreases with the distance and diameter of the source pipe, and increases with the diameter of the target pipe. The frequency of the domino effect can be estimated from this probability and from the frequency of the initiating pipe failure plus, in the case of jet fire impingement, the probability of ignition. The frequency of the secondary pipe failure thus calculated, always higher than the individual frequency of this pipe, allows obtaining more realistic risk analysis results. HIGHLIGHTS In parallel pipelines domino effect can have a significant influence.  Domino effect will be originated by jet erosion or jet fire impingement.  The domino effect probability depends on the geometric arrangement of the system.  A mathematical model has been developed to estimate domino effect probability.  This probability allows a more realistic estimation of failure frequencies. ABSTRACTParallel pipelines are frequently installed over long distances, due to the difficulty in creating or maintaining the required corridor. This implies that a release in one pipeline can seriously affect another one. The main risks associated with this domino effect are erosion by fluid-sand jets and the thermal action of jet fires. In this paper a survey has been performed on the accidents that have occurred, and the diverse associated domino sequences are analyzed. The probability of occurrence of domino effect is a function of the location of the hole, the jet direction and solid angle, the diameter of both pipelines and the distance between them. A mathematical model has been developed to estimate this probability. The model shows how the probability of domino effect decreases with the distance and diameter of the source pipe, and increases with the diameter of the target pipe. Its frequency can be estimated from this probability and from the frequency of the initiating pipe failure plus, in the case of jet fire impingement, the probability of ignition. The frequency of the target pipe failure thus calculated, always higher than its individual frequency, allows a more realistic risk analysis.

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“…Natural gas is often described as ecologically clean or environmentally friendly [7]. As a result of controlled natural gas combustion, there is practically no dust emission, and the gas emissions in relation to the units of chemical energy of fuel are much lower compared to those of solid and liquid fuels [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Approaches for Safety Analysis of Gas-Pipeline Functionality in Terms of Failure Occurrence: A Case Study

et al. 2018

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Abstract:The development of appropriate assessment methods of gas-pipeline functionality contributes to the reduction of failure consequences and helps engineers to make the right decisions as to the optimal solution choice for technical facilities, as well as provides procedures to protect their users and the surrounding environment. This paper presents methods for the assessment of gas network operation. Pipe failure data were collected from a gas distribution network. A statistical analysis of the failure of gas networks was made. An attempt was made to isolate seasonal and accidental fluctuations in the tested failure stream. The Poisson distribution was proposed as a model of failure distribution of gas networks. The conducted analysis allowed us to propose the forecasting method of acceptable failure consequences using the homogeneous Markov chain. The obtained results are valuable for supporting the management of urban gas networks, mainly in terms of the strategic modernization plans and the rehabilitation techniques.

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Failure analysis of natural gas pipes

Cited by 103 publications

References 8 publications

Analysis of the gas network failure and failure prediction using the Monte Carlo simulation method

Analysis of the gas network failure and failure prediction using the Monte Carlo simulation method

Analysis of domino effect in pipelines

Approaches for Safety Analysis of Gas-Pipeline Functionality in Terms of Failure Occurrence: A Case Study

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