Structure design and characteristic analysis of a foam jetting pig for high-sulfur gas-liquid mixed pipelines

Yu, Zhenwen; Li, Changjun

doi:10.1016/j.jngse.2021.104070

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…Such events are widespread and are triggered by a variety of causes. The causes of cooking-gas explosions in residential neighborhoods are stipulated by a range of interconnected factors (circumstances) of a technical or regulatory nature or involve human factors [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Specifics of Explosion-Venting Structures Providing Acceptable Indoor Explosion Loads

et al. 2021

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This article experimentally and theoretically demonstrates that the presence of blast-relief openings (windows) equipped with explosion-venting structures (EVS) allows explosive pressure to be reduced to a safe level (2–4 kPa). We provide results of model and full-scale experiments aimed at studying the influence of EVS parameters of blast-relief openings in explosion-hazardous buildings on the intensity of explosive loads. It was demonstrated that the maximum explosive-pressure value inside EVS-equipped buildings depends on the EVS start-to-open pressure, the structure’s response rate (lag), and characteristic dimension of the premises. Thus, each particular building requires individual selection of EVS parameters, which provide a safe level of excessive pressure in case of an explosive accident. This aspect, however, prevents the widespread use of EVS at explosion-hazardous sites. This article offers an modest upgrade of the explosion-venting structure that provides an indoor pressure equal to the EVS start-to-open pressure. The suggested innovation excludes the possibility of a significant increase in explosive pressure due to an EVS response delay. The efficiency of the suggested technical upgrade was proven by numerical experiments and indirectly by experimental studies aimed at exploring the physical processes associated with the opening of EVSs after an explosion accident. The use of upgraded EVSs will allow for provision of a known maximum level of the explosion load should an explosion event occur in an EVS-equipped room.

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Section: Introductionmentioning

confidence: 99%

Specifics of Explosion-Venting Structures Providing Acceptable Indoor Explosion Loads

et al. 2021

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A Hydraulically Activated Power Launching Method for Pigs for Gas-Gathering Pipeline Networks in Gas Fields

2022

J. Pipeline Syst. Eng. Pract.

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Experimental determination of glazing efficiency in case of indoor explosions caused by accidents

Комаров

Korolchenko

Громов

2023

Požarovzryvobezopasnostʹ

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Introduction. The authors present the results of testing single and double glazing, used as explosion relief structures (ERS) to ensure the explosion resistance of buildings and structures in case of indoor explosions caused by accidents. The criterion of comparative effectiveness of ERS is the value of maximum pressure inside the premises caused by an emergency deflagration explosion and the response of an explosion relief structure. The lower the maximum pressure under otherwise equal conditions (the volume of the room, the area of the relief opening, the type of the explosive mixture), the higher the ERS effectiveness.Goal and objectives. The purpose of this study is to experimentally determine the effectiveness of glazing used as an explosion relief structure in case of emergency deflagration explosions inside buildings. It is necessary to solve the following tasks to attain the pre-set goal:experimentally determine the relief pressure of ERS, or single and double glazing during an indoor deflagration explosion;determine the maximum pressure inside the explosion chamber using glazing as ERS;conduct the comparative (also numerical) analysis of the results of experimental studies to confirm the accuracy of the ERS relief pressure value;compare the results of experimental studies with the calculated values of the ERS relief pressure obtained using the methods recommended in the regulatory documents.Research methods. In the course of ERS testing, an explosion chamber, having the operating volume of 8 m3 and the relief opening area of 1.3 m2 was used. Hence, the specific area of the ERS was 0.16 m2 per 1 m3, which is 3.2 times higher than that recommended in the regulatory documents. Therefore, any pressure, exceeding the threshold values (5–7 kPa) inside the explosion chamber, unambiguously shows the ERS inefficiency. Results and their discussion. The results of testing the 4 mm single glazing and the area of 1 m2 (meeting the requirements of paragraph 6.2.30 of SP (Construction Regulations) 56.13330.2021) show that such glazing is ineffective as the ERS. Excessive relief pressure and maximum pressure in a room with an extra area of the relief opening have high values: Prel = 11 kPa; Pmax = 12 kPa. Such loadings are destructive for industrial buildings and structures.High values of relief and maximum pressures (14.7 and 17.7 kPa) in a chamber (17.7 and 20.5 kPa) allow drawing a conclusion about the inefficiency of double glazing as ERS.In the course of testing both single and double glazing, considerable glass fragment dispersion (up to 30 m deep and up to 13 m wide) was observed, which could result in the injury of people near the building during an accident.Conclusions. Experiments have shown that the assumed (calculated) glazing deflagration pressures, recommended by a number of regulatory documents and research publications, may differ significantly from the actual values, which may cause building collapses as a result of indoor explosions.

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Structure design and characteristic analysis of a foam jetting pig for high-sulfur gas-liquid mixed pipelines

Cited by 3 publications

References 23 publications

Specifics of Explosion-Venting Structures Providing Acceptable Indoor Explosion Loads

Specifics of Explosion-Venting Structures Providing Acceptable Indoor Explosion Loads

A Hydraulically Activated Power Launching Method for Pigs for Gas-Gathering Pipeline Networks in Gas Fields

Experimental determination of glazing efficiency in case of indoor explosions caused by accidents

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