POE worked with CNOOC Installation Company to perform the dewatering, drying, nitrogen purging and air- tight leak test for two gas pipelines: a Dry Gas 12 "gas pipeline and a Wet Gas 12" gas pipeline. Dry Gas 12 "gas pipeline is between PL19-3 RUP and TEE, the length is approximately 42.69km. And the length of wet Gas 12" gas pipeline is approximately 16.8km, it is between CFD11-6 and WYE .