The flange cover (blind flange) achieves removable sealing of the pipe port through a solid structure,It adopts solid structure and has various sealing surface forms (flat/ convex surface / tongue and groove surface, etc.), including bolt hole blind flange and welding blind plate.

The welded blind plate achieves a pressure resistance of hundreds of bar through full penetration, while the blind flange relies on gasket sealing and requires maintenance every 12-24 months.

The flange cover is suitable for pipeline isolation (maintenance/pressure test), safety isolation (8-shaped blind plate to prevent leakage) and other scenarios.

The flange covers are made of carbon steel/stainless steel/alloy steel, and lining blind plates are optional for corrosive conditions. The implementation standards include the national standard GB/T 9123 (flange cover) and the chemical standard HG/T 20592 (high temperature conditions allow the use of 0Cr18Ni9Ti material at 500°C).

Technical selection suggestions: give priority to welding blind plates for complete isolation, and use plug-in plates for temporary blocking; high voltage/ Select special material flange cover for corrosive conditions. Accurate selection requires comprehensive consideration of pressure level, medium characteristics and operating frequency, and balancing safety and economy.