The Challenge
Two newly installed gas compressors were fitted with blowdown piping that was undersized. During emergency shutdowns, excess back pressure caused the pressure safety valves (PSVs) to lift—posing operational and safety risks. A compliant, engineered solution was urgently required to prevent PSV activation during shutdown sequences.
Our Solution
We engineered and fabricated new low-temperature pipework capable of managing the increased gas flow during shutdown events. Our team cut new tie-ins to the existing lines, installed upgraded outlet piping, fabricated new pipe supports, and modified the compressor skids to accommodate the larger diameter system. All fabrication was performed to low-temperature welding procedures suitable for service at -45°C.
The Outcome
Following installation, both compressors can safely shut down without lifting the pressure safety valves. The system now complies with operational safety parameters and reduces shutdown risks across the plant.