How To Replace A Gasket For Flange Connections

It takes several steps to replace a gasket between two bolted flanges(flange connection).

Before the replacement, make sure the pipeline is empty. Any residue remained inside may cause uncontrolled damage to operators.
Loosen fasteners(bolts and nuts) in an opposite way/sequence they were tightened.
Check again whether the line is empty before completely opening the flange connection.
Using manual or hydraulic flange spreader to spread flange faces open.
Remove the gasket. If some gasket parts stick to flange faces, try to scrape it away. Be careful not to scratch flange face. Clean both flange faces.
Put on a brand new gasket. Align it to both flange faces.
Tighten all freshly lubricated bolts in cross-over pattern.
Clean the site and retrieve all tools.

Views: Author：hbmetals Date:15/01/06