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Weld Neck Flange
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- 商品名稱: Weld Neck Flange
Butt welding flange is one of our common pipe fittings, butt welding flange is also called WN neck butt welding flange. It refers to a flange with a neck and a round pipe transition and butt welding connection with the pipe. Butt welding flanges are not easily deformed, have good sealing, are widely used, have corresponding rigidity and elasticity requirements and reasonable butt welding thinning transitions. The sealing surface of butt welding flange is generally raised surface (RF), concave-convex type (concave FM convex surface M), and tongue and groove type are not commonly used. Butt welding flanges are suitable for pipelines with large fluctuations in pressure or temperature or pipelines with high temperature, high pressure and low temperature, and are also used in pipelines for transporting petroleum, chemicals, flammable and explosive media. The welding method used when connecting the flange and the pipeline of the butt welding flange is butt welding. The welding seam is similar to the welding of pipelines and pipelines. Generally, argon arc welding is used for the bottom of the small pipe diameter, and the cover surface is manually welded. Only use double-sided welding.
Flanges, also known as flanges, are parts that connect pipes to each other. There are holes on the flange, and the bolts connect the two flanges tightly. Flange connection refers to a detachable connection in which flanges, gaskets and bolts are connected to each other as a set of combined sealing structures. The flange used for piping refers to the inlet and outlet flanges of the equipment when used on equipment. The flanges are sealed with gaskets. Flanges are divided into threaded flanges and welded flanges.
WN neck butt welding flange can be divided into: carbon steel: (20#, A3, Q235, Q235A, Q235B, 20G, 16Mn, Q345, Q345R, ASTM A234WPB, ASTM A105, etc.); stainless steel: (304, 304L, 316,316L, S30408, S30403, S31608, S31603, SUS304, ASTM A403, TP321, TP317L, 347,0Cr18Ni9,00Cr19Ni10,00Cr17Ni14Mo2,1Cr18Ni9Ti, 06Cr17Ni12Mo2,022Cr17Ni12Mo2 etc.); steel: (16MnR, Cr5Mo, 12Cr1MoV, 10CrMo910 , 15CrMo, 12Cr2Mo1, A335P22, St45.8/Ⅲ, A10bB, etc.); Special alloy steel: (TP310S, 904L, Incoloy800, Incoloy825, Incoloy600, Incoloy625, etc.); Duplex stainless steel: (F51, S31803, S2205, F53, 2507 , S32750, F55, 2607, S32760, etc.);
Common types and codes of flanges: 1, PL plate flat welding flange, 2, SO flat neck flange, 3, WN neck butt welding flange, 4, SW socket welding flange, 5, Th thread Flange, 6, BL flange cover, 7, eight-character blind plate, 8, PJ/SE neck butt welding ring loose flange, 9, PJ/PR flat welding ring loose flange, 10, reducing flange , 11, stainless steel flange, 12, pressure vessel flange, 13, American standard flat welding flange, 14, American standard SO flat neck flange, 15, American standard WN neck butt welding flange
Commonly used sealing surface form codes for flanges: raised surface RF, concave surface FM, convex surface M, tenon surface T, groove surface G, full plane FF, ring connection surface RJ
Commonly used implementation standards for flanges: my country's current flange standards are divided into two systems, namely PN series (European system) and Class series (American system). The pressure marking specified in this standard is divided into PN marking and Class marking. PN marking has 12 pressure levels, namely: PN2.5; PN6; PN10; PN16; PN25; PN40; PN63; PN100; PN160; PN250; PN320; PN400. Class marked with 6 pressure levels, namely: Class 150; Class 300; Class 600; Class 900; Class1500; Class 2500. The executive standards include GB series (National Standard), JB series (Department of Machinery), HG series (Ministry of Chemical Industry), ASME B16.5 (American Standard), BS4504 (British Standard), DIN (German Standard), JIS (Japanese Standard) .
National standards: GB/T9112-2010, GB/T9119-2010, GB/T9116-2010, GB/T9115-2010
Ministry of Chemical Industry Standards: HG/T20592-2009, HG/T20615-2009, HG5010-52～HG5028-58, HGJ44-91～HGJ65-91, HG20592-97
American Standard: ASME B16.5, ASME B16.47
Mechanical Department Standard: JB81-59～JB86-59, JB/T79-94～JB/T86-94, JB/T74-1994
Pressure vessel standards: NB/T47020-2012, NB/T47021-2012 (JB/T4701), NB/T47022-2012 (JB/T4702), NB/T47023-2012 (JB/T4703), NB/T47024-2012 (JB /T4704)- Weld Neck Flange
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Mail:zfmn1234@gmail.com
Address: Meidel Industrial Park, Chengxi Development Zone, Jingxian County, Hengshui City, Hebei Province
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