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Repair of High Pressure NG / LPG Pipeline

Query Raised By: Renu Raina, Joint Director, OIDB Bhawan, Sector-73, Noida, U.P.

What are the methods for repair of High Pressure Natural Gas / LPG Pipeline in operating condition, their selection criteria and comparison w.r.t safety and integrity?

(1)  Comments

  • Gautam Chakravarty, CGM (Gas-O&M), GAIL(Expert)   -   15-Apr,2019 15:03

    Cutting out a cylindrical piece of pipe having damage / defect and replacing it with equivalent grade and thick pre tested pipe section is the preferred repair option. In case online repair is necessary, installing clamp-on / bolt-on leak clamps is a temporary measure and welding of Type A or Type B sleeve are considered permanent repair based on type of defect to be addressed. Strengthening by composite sleeves is also acceptable in certain cases.