METHOD TO ACCELERATE A DRYING PROCESS IN THE INSIDE FOR A PRE-COMMISSIONING PROCESS OF AN UNDERWATER PIPELINE, CAPABLE OF REDUCING THE TIME TO DRY AIR INSIDE THE PIPELINE

摘要

PURPOSE: A method to accelerate a drying process in the inside for a pre-commissioning process of an underwater pipeline is provided to satisfy the condition of a dew point with minimum costs of nitrogen gas and to shorten the time to dry for the pre-commissioning process.;CONSTITUTION: A method to accelerate a drying process in the inside for a pre-commissioning process of an underwater pipeline comprises the steps of: cleaning an inner part of the pipeline by injecting high pressure water inside the pipeline (S101); removing foreign substance inside the pipeline (S102); checking a section where water is leaked in the pipeline (S103); cleaning the inner part of the pipeline and removing the foreign substance (S104); drying the inner part of the pipeline by injecting hot air into the inner part (S105); and heating nitrogen gas and injecting the same into the pipeline (S106).;COPYRIGHT KIPO 2013;[Reference numerals] (S101) Cleaning step; (S102) Picking operation step; (S103) Leakage checking step; (S104) Dehydrating step; (S105) Drying step; (S106) Heating and injecting nitrogen gas step