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FLANGE TYPE SPECIFICATION
2024.08.06
The flange is a part with a flange. The flange can be individual, called a flange, or it can be a combined type, such as the flanges at both ends of the valve, for easy installation of bolts. This article introduces the material of the flange, the form of the sealing surface and the type of flange according to the national standard and chemical, petrochemical and mechanical standards.
Material
No. 20, A105, Q235A, 12Cr1MoV, 16MnR, 15CrMo, 18-8, 321, 304, 304L, 316, 316L.
Sealing surface form
Plane (FF), Raised (RF), Convex (M), Concave (F), Concave and Convex (MF), Tenoning (T), Groove (G), Tongue and Groove (TG), Ring Connecting Surface (RJ).
According to national standards, it is divided into:
Integral flanges, threaded flanges, butt weld flanges, flat welded flanges with necks, socket welded flanges with necks, butt welded rings with neck loose flanges, plate flat welded flanges, butt welded ring plate loose flanges, flat welded ring plate loose flanges, flanged ring plate loose flanges, flange covers.
According to the chemical industry standard, it is divided into:
Integral Flange (IF), Threaded Flange (Th), Plate Flat Flange (PL), Butt Flange with Diameter (WN), Flat Flange with Neck (SO), Socket Flange (SW), Butt Weld Ring Loose Flange (PJ/SE), Flat Weld Ring Loose Flange (PJ/RJ), Lined Flange Cap (BL (S), Flange Cap (BL).
According to the petrochemical industry standard, it is divided into:
Threaded flange (PT), butt weld flange (WN), flat weld flange (SO), socket weld flange (SW), loose flange (LJ), flange cover (not Noted).
According to the mechanical industry standard, it is divided into:
Integral flanges, butt weld flanges, plate flat welded flanges, butt welded ring plate loose flanges, flat welded ring plate loose flanges, flanged ring plate loose flanges, flange covers.
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