What is a flange joint?

  •   What is a flange joint?

      Flange joint is the connection between the pipeline and another pipeline equipment (for example, another section of pipeline, valve, or pressure vessel). The operation of the piping system requires hundreds or even thousands of flange joints.

      The three main components of Non-Asbestos Gaskets Factory's flange joints are:

      Two mating flanges ("main" flange and "matching" flange).

      The number of stud bolts used for flanges (flanges with different diameters, grades, and surface finishes require different numbers and sizes of stud bolts and nuts to be properly sealed);

      The two washers can be metallic (spiral wound, ring joint, jacket, and Kammprofile) or non-metallic (non-asbestos washers).

      The steel pipe can be welded to the flange (this is the case of butt welding flanges, socket welding flanges, socket flanges, and lap flanges) or screwed to flanges (threaded flanges). Welded connections between pipes and flanges are used for high pressure and high-temperature applications and have a diameter of more than 2 inches. Threaded connections are used for small diameter pipe systems that are not affected by mechanical forces (such as expansion, vibration, contraction, and oscillation).

      Ring Joint Gaskets Manufacturer's flange insulation kits can also be used for flange connections to protect flanges, bolts, and gaskets from corrosion caused by static current flowing through the pipeline (this is called "cathodic protection").

      To prevent dangerous leaks in the pipeline, flange joints can only be performed by trained personnel (standard TSE-TS EN 1591 Part 1-4 "Flanges and joints" is a reference specification).