However, care should be taken to properly install them for safe operation. Subsequent investigation found that the alloy 600 nickel-chromium-iron material on the burst disk failed at pressures below the design specification, indicating that the material is adversely affected by exposure to the combination of stresses and hydrogen. Increasing the sampling rate could rectify portions of this problem. Such losses normally include nozzle entrances and exits, elbows, tees, reducers, valves, and the rupture disk. Subsequently, corrective action was taken to increase the vent line diameter and to add bracing. Required fields are marked *. When the damaged portion of the tube bank was isolated, filling operations resumed with the unaffected portion of the tube bank until the second burst disk failed. Twelve applicable burst-disk incidents from the H2Incidents.org database are highlighted below in chronological order of occurrence date, from the earliest to the most recent. Failure Analysis of High Pressure Rupture Discs and Effective - ASME The burst disk must be rated and installed correctly for its application. In such a case, a sampling rate of a few times per minute may suffice. Due to the metal-to-metal sealing surfaces, any re-installation of a rupture disc is likely to seal less effectively. Weve learned to believe what our monitors tell us and to rely on the data they report. The ability of a system to react properly depends upon having adequate and appropriate data available. The rupture disc used for safety in Chemical & Petro-Chemical Industries is one of the critical components where the design has to be done for failure of thematerial than the usual design problem of Engineering Design which is designing for strength. Permissible overpressure or vacuum pressure, Necessary vent area, or required flow rate, Alarm system to transfer the signal for rupture disc opening. This results from a combination of wrong rupture-disc-selection and poor piping-design. Interteks findings serve as evidence of what we at CDC already know our products are the finest that money can buy. Since the vent stack was open, some water entered and froze, plugging the stack and sealing off the only hydrogen pressure-relief exit path. The experimental process was as follows: (1) the rupture disc was fixed between the top and bottom holders; (2) the holders were heated to the preset temperature and held for 30 min; and (3) the pressure was applied by filling with compressed air until the fracture happened.

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