STUDY ON THE SAFETY INTEGRITY OF THE PRESSURE RELIEF CAPACITY OF PRESSURE BEARING SYSTEMS WITH RELIEF CHARACTERISTICS CONSIDERATION

摘要

The relief characteristic of safety valve plays an important role on system relief capacity. Based on the analysis of the influence of setting pressure, back pressure, discharger area on relief capacity, a relief curve development method was proposed that takes into account the backpressure based on API 520 standard. The relief curve method is then applied in the analysis of the relief capacity of pressure bearing systems. By taking into consideration the multiple pressure relief characteristics in pipe network, the safety integrity of multiple pressure reliefs was studied and an associated assessment procedure was proposed. The method and corresponding procedure are important contributions for the assessment of safety integrity of relief capacity in pressure bearing system.