Project Overview

As part of the Client’s process hazard assessment, an action item was generated to review the need to provide overpressure protection for the tube side of two coolers for the tube rupture case. Both coolers have cooling water on the tube side, and high-pressure hydrogen on the shell side. The Client’s process engineering reviewed this item and identified that there is currently no effective overpressure protection on these exchangers in the event of a tube rupture. The only protection in place is a common thermal relief PSV on the combined cooling water discharge line, which is not adequately sized for the tube rupture case.

Overpressure Protection main

Risk Mitigation

In the event of a tube rupture, the high-pressure hydrogen would enter the low pressure tube side and the overpressure may result in a release or further equipment damage.

The Client’s process engineering recommends adding overpressure protection for the tube side of the coolers for the tube rupture case.

Scope of Work

Rally provided process support for the sizing of the rupture discs, preliminary pipe routing and pipe stress analysis, and structural engineering support for the pipe supports required.
Rally provided a Capital Cost Estimate based on the IFC construction work packages, to support the Client’s AFE process.

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