Flange
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Lined flange cover (code BL (S))
The full name is “Lined Flange Cover,” designated as BL(S). It is a special type of blind flange (flange cover) that features an additional corrosion-resistant lining on the sealing surface side, used to seal pipelines while providing protection against media corrosion.
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8-character blind flange (code name BLF)
The full name is “8-shaped blind flange,” with the code BLF. It’s a special type of flange cover that resembles the shape of the number “8.” It consists of two parts: a “blind flange (sealing end)” and a “ring flange (flow-through end).”
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The full name is “Welding Neck Flat-Face Flange,” designated as SO. Its defining feature is its short-neck structure; after the pipe is inserted into the flange’s neck opening, it is connected by a flat weld (with the weld located on the outer side of the flange neck).
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The “welding-neck flange,” designated as WN, is one of the commonly used types of flanges. It is characterized by a short, tapered neck that is welded to the pipe using a butt-weld connection.
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