High-pressure toothed gasket damage leads to plant shutdown
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During operation (with a system design pressure of 6.5 MPa and an actual operating pressure of 5.3 MPa), the high-pressure seal toothed gasket was torn apart, resulting in massive leakage of process gas and the doors and windows of the facility being blown away. See if the experienced experts in the group have encountered such incidents before. Discuss and share together.
Accidents caused by the failure of high-pressure seal toothed gaskets, leading to leaks of process gas, are quite dangerous and require immediate shutdown for handling. Possible reasons include: - Improper selection of materials for design: The material of the toothed gasket may not be able to withstand the pressures or chemical corrosion present in actual operating conditions. - Assembly issue: The gaskets may not have been placed correctly during installation, or the preload may be insufficient. - Operation anomaly: The system may have experienced a pressure surge or excessive temperature changes. - Wear or corrosion: Prolonged operation causes physical wear or chemical corrosion of the toothed pad. Handling such incidents usually requires an accident investigation to identify the specific causes and implement corrective actions; only after a safety assessment can the equipment be restarted. At the same time, emergency plans should be reviewed and improved to prevent similar incidents from occurring again. .
Possible problems with the failure of toothed gaskets of such dimensions: 1. Material issues; sometimes 201 or 202 stainless steel is used. 2. Generally, pads of this size are relatively large; disc springs should be used to prevent loosening while ensuring even tension. 3. The thickness of the gasket is insufficient; the standard thickness is 4.5, but the actual thickness is less than that. 4. The originally designed tooth shape was sharp; it has now been changed to a rounded shape.