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本文通过对车用LNG焊接绝热气瓶定期检验,对发现的裂纹、螺纹损伤、泄漏等缺陷和问题进行原因初步分析,简要介绍了外观、焊缝、螺纹、附件的检查及气密性试验、静态蒸发率测量等项目和方法,提出定期检验过程中气瓶及附件需拆卸后检验、用氮气做气密性试验和不需漏率检测、气压试验、抽真空处理、真空度测量及加强气瓶制造质量控制、日常检查维护等建议。
In this paper, through the regular inspection of automotive LNG welding adiabatic gas cylinders, the defects, such as cracks, thread damage and leakage discovered, are preliminarily analyzed. The appearance, weld, thread, accessories inspection and air tightness test are briefly introduced. Static evaporation rate measurement projects and methods, proposed during the regular inspection of gas cylinders and accessories to be disassembled after testing, with nitrogen gas tightness test and no leak rate test, pressure test, vacuum processing, vacuum measurement and enhanced gas Bottle manufacturing quality control, routine inspection and maintenance and other recommendations.