Technical aspects of the DIN 2696 standard application
This regulatory document specifies the design and performance characteristics of flange connections equipped with sealing lenses. This type of execution is critical for ensuring tightness in high-pressure piping systems (above 63 bar), where traditional gasket solutions may prove insufficiently effective.
The standard establishes strict requirements for the geometric parameters of the lenses and the geometry of the mating contact surfaces of the flanges. The application range covers nominal diameters from DN 10 to DN 200 at nominal pressures in the range of PN 63 – PN 400. EV Group China specialists emphasize that the precision of the seating surface machining is a determining factor for the reliability of the assembly under extreme operating conditions.
To ensure compatibility with various types of pipe fittings and main pipelines, the standard provides for two design sizes of sealing lenses. The choice of a specific execution depends on the strength class of the flange pair and the specifics of the working medium.