The total length of process pipelines converted into inch-diameter equivalents is 1,400 inch-diameters, of which 664 inch-diameters have been completed, leaving a remaining 736 inch-diameters; 2,000 meters of high-pressure pipelines have been dismantled and 532 meters installed; 25 process valves have been repaired or replaced; all-position automatic welding is adopted for the welding of process pipelines made of special materials such as nickel-based alloys, chrome-molybdenum steel and stainless steel.
