Corrosion Induced Explosion of a High-Pressure Fire-Extinguishing Gas Cylinder

Conducting tensile experiment with high pressure gas cylinder materials to analyze its acoustic emission (AE) signals, can realize the stretch features and AE signals regularity, which is very important to distinguish high pressure gas cylinder detection. The AE signals are divided into four different stages through the tensile experiment, which show that AE signals and theory analysis are fitted well and thus be used to distinguish materials defects.

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The Properties of the Steel for High Pressure Gas Cylinder

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.757.45 ◽

2015 ◽

Vol 757 ◽

pp. 45-49

Author(s):

Qiu Juan Lv ◽

Xiu Yu Li ◽

Chang Jiang Liu ◽

Zhi Qing Guo ◽

Yan Jiao Li

Keyword(s):

Mechanical Properties ◽

High Pressure ◽

Structural Steel ◽

Experimental Analysis ◽

Gas Cylinder ◽

Plastic Strength ◽

Tension Strength

The gas cylinder is used in most cases, which is often made from alloy structural steel. When it is used in high pressure gas cylinder, the larger volume, higher weight, and larger length will produce. It is found that both in theoretical and experimental analysis that this kind of material has syntactical mechanical properties such as the tension strength and plastic strength, so it can be reused many times.

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Ultrafine Spray of Gas-Water Compositions Investigation for Fire Extinguishing Systems

Occupational Safety in Industry ◽

10.24000/0409-2961-2021-7-60-65 ◽

2021 ◽

pp. 60-65

Author(s):

A.V. Kazakov ◽

◽

N.V. Smirnov ◽

A.V. Gladilin ◽

◽

...

Keyword(s):

Import Substitution ◽

Laser Diffraction ◽

Volumetric Method ◽

Gas Composition ◽

Water Droplets ◽

Original Design ◽

Droplet Dispersion ◽

Fire Extinguishing ◽

Water Composition ◽

Fire Extinguishing Gas

The analysis of information about domestic and foreign installations of the volumetric fire-extinguishing with gas-water compositions is carried out. Pneumoacoustic sprayers of original design were developed, which make it possible to obtain a gas-water composition containing fire-extinguishing gas and water droplets of the ultrafine spray (10–60 microns). It is shown that gas-water compositions combine the advantages of fire-extinguishing gas and fine-sprayed water, since the volumetric method of gas fire-extinguishing and the cooling effect of water are preserved. The deposition (movement) of drops of the gas-water composition occurs together with the fire-extinguishing gas; therefore, the gas-water composition of the ultra-dispersed spray can be conventionally considered as a whole, i.e., new extinguishing agent. It is noted that the most promising is the application of gas-water compositions in the extinguishing of solid smoldering materials. In this case, when designing domestic fire-extinguishing installations, the amount of gas can be reduced by 20% or more, and the elimination of smoldering can be achieved by cooling with water from the gas-water composition. At the same time, the fire-extinguishing environment suitable for breathing for at least 3 minutes is formed in the room. The influence of gas in the gas-water composition on the dispersion of water droplets is studied. The sedimentation rate of water droplets in the gas-water composition was estimated. The droplet dispersion was measured by laser diffraction using the Malvern Spraytec system. It is shown that the substitution of nitrogen for argon or gas composition Argonite in the gas-water composition does not significantly affect the dispersion of droplets. Sedimentation of ultrafine spray water droplets in the volume of the room occurs within a few minutes. Nitrogen has the best characteristics for use in the gas-water compositions. Conducted studies make it possible to conclude that the installations based on domestic gas-water compositions allow for import substitution of the foreign analogues certified in Russia.

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Experimental Verification of Fracture Toughness Requirement for Leak-Before-Break Performance for 155–175 ksi Strength Level Gas Cylinders

Journal of Pressure Vessel Technology ◽

10.1115/1.3264927 ◽

1987 ◽

Vol 109 (4) ◽

pp. 435-439 ◽

Cited By ~ 8

Author(s):

M. D. Rana

Keyword(s):

Fracture Toughness ◽

High Pressure ◽

Plane Stress ◽

Experimental Work ◽

Strength Level ◽

State Problem ◽

Gas Cylinder ◽

Gas Cylinders ◽

Leak Before Break

This paper deals with a determination of the fracture toughness requirement to obtain leak-before-break performance for a 155–175 ksi strength level high-pressure gas cylinder. Analytical LEFM methods along with Irwin’s KIc-Kc equation related by the parameter βIc were used to predict the fracture toughness requirement for the plane-stress fracture state problem. Experimental work was conducted on flawed cylinders to quantify the fracture toughness requirement for leak-before-break performance. The results indicated that the analytically predicted toughness requirement is 4 to 25 percent higher than that established experimentally. The results also indicated that the minimum specified KIc(J) value of 85 ksi in. (93.5 MPam) for the gas cylinder is sufficiently higher than the analytically and experimentally established toughness values to provide the desired leak-before-break performance.

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