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316L butt welding flange

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Welding neck flange

Neck butt welded steel pipe flange. The gasket is placed between the two flange sealing surfaces. After the nut is tightened, the specific pressure on the gasket surface reaches a certain value, which causes deformation, and fills the uneven parts on the sealing surface, so that the connection is tight. Flange connection is a detachable connection. According to the connected parts, it can be divided into vessel flange and pipe flange; according to the structural type, it has integral flange, looper flange and threaded flange. Common integral flanges include flat welding flange and butt welding flange. The flat welding flange has poor rigidity and is suitable for the occasion with pressure P ≤ 4MPa; the butt welding flange, also known as high neck flange, has high rigidity and is suitable for the occasion with high pressure and temperature.

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