减粘塔管线的检测及安全评定

某石化公司减粘反应塔管线经过多年的运行,已经超过其设计寿命,因此有必要对其进行全面的检测和安全评定。通过对管线出入口端节的化学成分及金相组织分析,发现材料的显微组织有一部分片状珠光体组织已转变成球状珠光体组织,通过分析珠光体球化对机械性能的影响,得出15CrMo钢的热强性能还未完全老化。通过现场对管线硬度及壁厚的检测,以及随后对管线的壁厚进行的理论校核,得出减粘反应塔管线在目前的工况条件下,仍可继续使用。这为该设备的安全运行提供了科学的依据,同时也提出了一些使用建议。

Detection and Safety Assessment of Viscosity Reducing Tower Pipelines

The viscosity reducing tower pipeline has been used in a certain petrochemical company for many years, which has already exceeded its design lifetime. Therefore, it is necessary to carry on overall detection and safety assessment. By analyzing the chemistry composition and metallurgical structure locating the pipeline exit and entrance, in the metallurgical structure of materials, partial platelike pearlitic structures have been changed into the globular pearlitic structures. Analyzing the influence of pearlitic spheroidization on machine behavior shows that thermal-intensity capability of 15CrMo steel has been not totally aged. Hardness and wall thickness of pipelines on the spot are detected, and subsequently, the wall thickness of pipelines is theoretically verified. The results show that under the current work condition, the viscosity reducing tower can keep on using. It provides a scientific reference for safety operation of the equipment. At the same time, some usage suggestions were given.