1. Flange type according to national standard: integral flange, thread flange, butt weld flange, neck flat weld flange, neck socket weld flange, butt weld ring with neck loose flange, plate flat Welded flange, butt welded ring plate loose flange, flat welded ring plate loose flange, flanged ring plate loose flange, flange cover.
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Fresh Onion Fresh Onion,White Onion,Dried Onion,Big Size Onion Jining Fuyuan Fruits And Vegetables Co., Ltd. , https://www.fuyuanfv.com
2, flange type according to chemical industry standards: integral flange (IF), threaded flange (Th), plate flat welding flange (PL), with butt welding flange (WN), with neck flat welding flange (SO), socket weld flange (SW), butt weld ring loose flange (PJ/SE), flat weld ring loose flange (PJ/RJ), lining flange cover (BL(S)), Flange cover (BL).
3, flange type according to petrochemical industry standards: threaded flange (PT), butt welding flange (WN), flat welding flange (SO), socket welding flange (SW), loose flange (LJ) , flange cover (not shown).
4. According to the mechanical industry standard: integral flange, butt welding flange, plate flat welding flange, butt welding ring plate loose flange, flat welding ring plate loose flange, flanged ring plate loose flange, Flange cover.
Flat welded steel flange: suitable for carbon steel pipe connection with nominal pressure not exceeding 2.5MPa. The sealing surface of flat welded flange can be made into three types: smooth type, concave and convex and grooved type. Smooth type flat welded flange The application quantity is large. It is mostly used in the case where the medium condition is moderate, such as low pressure non-purified compressed air and low pressure circulating water, and its advantage is that the price is relatively cheap;
Butt-welded steel flange: used for the butt welding of flange and pipe, its structure is reasonable, the strength and rigidity are large, it can withstand high temperature and high pressure and repeated bending and temperature fluctuation, and the sealing performance is reliable. The nominal pressure is 0.25-2.5MPa. The welded flange has a concave and convex sealing surface.
Socket welding flange: commonly used in pipelines with PN≤10.0MPa and DN≤40;
Loose flange: loose flange is commonly known as loop flange, split ring loop flange, flanged loop flange and butt sleeve flange. Commonly used for medium temperature and pressure are not high and medium corrosive Strong situation. When the medium is highly corrosive, the part of the flange that contacts the medium (the cuffed short section) is a corrosion-resistant high-grade material such as stainless steel, while the outside is clamped with a flanged ring of a low-grade material such as carbon steel. To achieve a seal;
Integral flange: It is often the integration of flanges with equipment, pipes, fittings, valves, etc. This type is commonly used on equipment and valves.
Sealing surface form: plane (FF), convex surface (RF), convex surface (M), concave surface (F), concave and convex surface (MF), hollow surface (T) groove surface (G), groove surface (TG), ring Connection face (RJ).
