Preservation of Piping
Piping systems on newly constructed wellhead towers required preservation from internal corrosion and degradation in the period between commissioning until operation, estimated at several years.
VpCI®-649 BD was diluted in water and introduced iteratively to various process piping systems and held for a period, after which it was drained back to a holding tank. After each “pump and dump” cycle, a pH test was performed to verify product concentration and facilitate top-up if required. Long-term corrosion control was verified through periodic corrosion coupon retrieval.
Corrosion rates in the system during the contractual preservation period were monitored via corrosion coupons, and satisfactory results were achieved.