Corrosion and On-Line Repair Measures of LNG Pipeline Cold Insulation System

Liquefied natural gas (LNG) terminal is an indispensable and important infrastructure in production, transportation, storage and marketing of the LNG industrial chain. Due to its special function, the LNG terminal is located near the coast, which leads to the corrosion of equipment and facilities in the terminal caused by the marine atmosphere all year round. The reason for LNG pipeline cold reserving system corrosion was analyzed, based on the corrosion problems of LNG pipeline cold reserving system encountered in the existing LNG recetving station in domestic, and the repairing method of LNG pipeline cold reserving system without stopping the gas transport was proposed, to ensure the efficient operation of LNG pipeline cold reserving system, which could provide reference for the corrosion protection for cold reserving system of equipment and facilities in low-temperature operation of LNG terminals.