The refinery and petrochemical production facilities process and produce the gaseous and liquid flammable hydrocarbons. Most of the processes are operated under high pressure. In case of any failure, improper design or human mistake there must be autonomous and independent pressure relieving systems activated to release the pressure to the flare systems to protect the equipment against the overpressure, damages and other consequences. The article describes a safety assessment of key process pressure relief valve installation at the Steam Cracker in Litvinov, Czech Republic. The intent of the safety assessments was evaluation the functionality of the process relief valve installation, to ensure the system meets the appropriate recognized and generally acceptable engineering practices and to confirm that the system can be operated safely. The article provides results and recommendations for the Ethylene Fractionator pressure relief valves, pipes, and support modifications as well as results of the relieving scenarios determinations and calculation.

中文翻译：

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乙烯分馏塔减压系统评估与改造

炼油厂和石化生产设施加工和生产气态和液态易燃碳氢化合物。大多数过程是在高压下进行的。如果出现任何故障、设计不当或人为错误，必须启动自主和独立的压力释放系统，将压力释放到火炬系统，以保护设备免受超压、损坏和其他后果的影响。本文介绍了捷克共和国利特维诺夫蒸汽裂解装置关键过程减压阀安装的安全评估。安全评估的目的是评估过程安全阀安装的功能，以确保系统符合适当的公认和普遍接受的工程实践，并确认系统可以安全运行。