CONSTRUCTION METHOD FOR HIGH PRESSURE NATURAL GAS PIPE LINE UTILIZING FLANGED PIPES

摘要

The present invention relates to a pipe construction method for transporting high-pressure natural gas using a flange pipe. According to a pipe body and a flange pipe where a flange is welded to both ends of the pipe body, a gasket groove is formed on a connection surface of the flange pipe, and width of a cross-sectional surface of the gasket groove is formed to get wider from the connection surface toward the inside.