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<p>The results of experimental studies on the assessment of the manufacturing quality of a pilot batch of high-pressure metal cylinders for technical gases in accordance with the requirements of DSTU EN ISO 9809-3:2019 are presented. Static (to failure) and cyclic pressure tests were conducted on the pilot batch of cylinders manufactured from seamless tubes. Non-compliance with the standard requirements was identified for certain geometric parameters across several cylinder sizes in the tested batch. It was established that all cylinder sizes passed static tests for both strength parameters and failure mode and met the requirements of the standard. Cylinder failure occurred in the longitudinal direction due to hoop stresses. At the same time, the strength characteristics of the cylinders obtained during internal pressure testing to failure are in good agreement with the results of tensile testing of laboratory specimens. It has been experimentally established that under a static load of increasing internal pressure, failure occurs via a quasi-static mechanism with signs of limited accumulated deformation. The limitation on deformation accumulation is likely related to the biaxial nature and the dynamic character of the failure process.</p>

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Experimental Evaluation of Test Batch Quality of Metal Cylinders Using Full-Scale High-Pressure Hydraulic Tests. Part 1. Results of Full-Scale Static Tests

  • 期刊论文

  • 发表日期：

    2026年5月28日

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  • O. P. Gopkalo,
  • R. I. Dmytrienko,
  • O. L. Palienko,
  • A. E. Lytvynenko,
  • A. V. Kravchuk

摘要

The results of experimental studies on the assessment of the manufacturing quality of a pilot batch of high-pressure metal cylinders for technical gases in accordance with the requirements of DSTU EN ISO 9809-3:2019 are presented. Static (to failure) and cyclic pressure tests were conducted on the pilot batch of cylinders manufactured from seamless tubes. Non-compliance with the standard requirements was identified for certain geometric parameters across several cylinder sizes in the tested batch. It was established that all cylinder sizes passed static tests for both strength parameters and failure mode and met the requirements of the standard. Cylinder failure occurred in the longitudinal direction due to hoop stresses. At the same time, the strength characteristics of the cylinders obtained during internal pressure testing to failure are in good agreement with the results of tensile testing of laboratory specimens. It has been experimentally established that under a static load of increasing internal pressure, failure occurs via a quasi-static mechanism with signs of limited accumulated deformation. The limitation on deformation accumulation is likely related to the biaxial nature and the dynamic character of the failure process.