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API STD 521《泄压和减压系统》在油田火炬设计中有着广泛的应用,但是,在实际计算过程中,由于对相关规定的理解不同,计算出的火炬筒体高度相差很大。介绍了API STD 521《泄压和减压系统》关于火炬筒体高度的计算公式和图表,结合伊朗某油田项目,阐述了热辐射率F、热强度传导系数?及允许热辐射值K这3个重要参数的选取原则,并对F、?、K不同取值情况下火炬筒体的计算高度进行了对比分析。对采用该规范计算火炬筒体高度时F、?、K的取值提出了建议,以确保火炬筒体设计高度合理,从而达到节约投资、降低安装和操作维护难度的目的。
The API STD 521 Pressure Relief and Decompression System is widely used in field torch designs. However, in actual calculations, the calculated height of the torch body varies widely depending on the understanding of the relevant regulations. This paper introduces the calculation formulas and charts of the height of the torch cylinder of API STD 521 “Pressure Relief and Decompression System”. Combined with the Iranian oilfield project, it expounds the thermal emissivity F, the thermal conductivity and the allowable thermal radiation K The principle of selection of important parameters is discussed. The calculated height of torch cylinder under different values of F,?, K are compared and analyzed. Proposals are put forward for calculating the values of F,?, K when using the specification to calculate the height of the torch cylinder so as to ensure that the design of the torch cylinder is highly reasonable so as to save investment and reduce the difficulty of installation and operation and maintenance.