Journal of Japan Society for Safety Engineering
Online ISSN : 2424-0656
Print ISSN : 0570-4480
ISSN-L : 0570-4480
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JOURNAL OF JAPAN SOCIETY FOR SAFETY ENGINEERING_2024_4
Displaying 1-13 of 13 articles from this issue
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PROPOSAL FOR SAFETY
REVIEW
TECHNICAL NOTE
  • Collection and Measurements on Pressure Regulator for Gas Cutting from Industrial Sites
    Part 2: Decomposition Measurement of Inlet Filters and Diaphragms
    Masaaki Yashima
    2024 Volume 63 Issue 4 Pages 232-238
    Published: August 15, 2024
    Released on J-STAGE: August 15, 2024
    DOIhttps://doi.org/10.18943/safety.63.4_232
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    This study continues with previously reported flame arresters, gas cutting torches, and pressure regulators collected from industrial sites. In Part 1 of the previous paper, appearance and pressure fluctuation during the gas （air）supply were measured without disassembling the main body of the pressure regulators. In Part 2, the pressure regulators were disassembled, and the inlet filters and diaphragms were examined from the viewpoint of aged deterioration. The inlet filters of the collected OX pressure regulators had attached powder of something and plastic fibers. It was found that the diaphragms became harder with time, and cracks were more likely to occur. The relationship between the number of years until measurement and the hardness （durometer, type A: HDA value）of oxygen and acetylene diaphragms was determined from the experimental results. It was also found that the aged deterioration can be evaluated using the HDA value.

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  • Collection and Measurements on Pressure Regulator for Gas Cutting from Industrial Sites
    Part 3: Decomposition Measurement of Presure Gauge Windows and Springs
    Masaaki Yashima
    2024 Volume 63 Issue 4 Pages 239-246
    Published: August 15, 2024
    Released on J-STAGE: August 15, 2024
    DOIhttps://doi.org/10.18943/safety.63.4_239
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    This study was a continuation of previously reported flame arresters, gas-cutting torches, and pressure regulators lected from industrial sites. In Part 3, the pressure regulators were disassembled, and the pressure gauge windows, essure adjustment springs （large springs）, and valve springs （small springs）were examined from the viewpoint of aged erioration. The following results were obtained. a）Low visibility of the pressure gauge was mainly due to scratches on the face of the plastic window. b）Aged deterioration of the springs was noticeable with small load ranges, and the deflection reased. c）Helpful information was obtained to elucidate the cause of explosions and fires.

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SAFETY MANAGEMENT AND PROVISIONS IN THE CORPORATION
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