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This document provides a procedure for drying and nitrogen purging of pipelines after hydrotesting. It involves using pigs to remove water and oxygen from the pipelines. The pipelines will be dried to a dew point of -20°C using desiccant dryers and foam pigs. After successful drying, nitrogen will be used to purge the pipelines and displace any remaining water vapor or oxygen. The pipelines will then be blocked with nitrogen for at least 12 hours at a pressure above ambient. Appropriate health, safety and e

Author

Adaghara

Language

EN