What Kinds Of Flanges Are There?

1. According to the national standard flange classification: overall flange, threaded flange, butt welding flange, flat welding flange with neck, socket welding flange with neck, butt welding ring with neck loose sleeve flange, flat welding flange, butt welding ring plate loose sleeve flange, flat welding ring plate loose sleeve flange, flanged ring plate loose sleeve flange, flange cover. 2. Classification of flanges according to the chemical industry standard: Integral flange (IF), threaded flange (Th), plate welded flange (PL), butt-welded flange (WN), butt-welded flange (SO), socket welded flange (SW), butt-welded ring loose flanges (PJ/SE), butt-welded ring loose flanges (PJ/RJ), lined flange covers (BL (S)), flange covers (BL). 3. According to the petrochemical industry standard flange classification: threaded flange (PT), butt welding flange (WN), flat welding flange (SO), socket welding flange (SW), loose sleeve flange (LJ), flange cover

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