316L stainless steel flange is a mild steel type of stainless steel. 316L is a grade of stainless steel, AISI 316L is the corresponding American designation, SUS 316L corresponds to the Japanese designation. China's unified digital code is S31603, the standard grade is 022Cr17Ni12Mo2 (new standard), and the old grade is 00Cr17Ni12Mo2. 316L stainless steel is a widely used chromium nickel molybdenum stainless steel, with good corrosion resistance, heat resistance, low temperature resistance mechanical characteristics, corrosion resistance in the atmosphere, acid and alkali resistance . It is a material commonly used in the manufacture of fluid pipe fitting flanges.
Flanges, also known as flanges, are the parts that connect pipes to each other. There are holes in the flange, the bolt makes the two flanges closely connected, the flange connection refers to the flange, the gasket and the bolt three interconnected as a set of combined sealing structure of the detachable connection, the flange Pipe refers to the flange used in the piping device, used in the equipment refers to the inlet and outlet flange of the equipment. The flange is sealed with a gasket. The flange is divided into threaded flange and welded flange.
Flanges 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, , 1Cr18Ni9Ti, 06Cr17Ni12Mo2 , 022Cr17Ni12Mo2, etc.); Alloy 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.);
Commonly used flange types and codes: 1, PL plate flat weld flange, 2, SO flat weld flange with neck, 3, WN with neck butt weld flange, 4, SW socket weld flange, 5, Th thread flange, 6, BL flange cover, 7, figure eight blind, 8, PJ/SE with neck butt weld ring loose sleeve flange, 9, PJ/flat weld ring loose flange PR, 10, Reducing Flange, 11, Stainless Steel Flange, 12, Pressure Vessel Flange, 13, American Standard Flat Weld Flange, 14, American Standard SO Flat Weld Flange with Neck, 15, American Standard WN with Flange butt welding
The commonly used sealing surface shape codes of flanges: RF protruding, FM concave, M convex, T herringbone, G groove, FF full plane, RJ ring connecting surface
Commonly used 316L stainless steel flange implementation standards: China'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. The PN marking has 12 pressure levels, namely: PN2.5; PN6; PN10; PN16; PN25; PN40; PN63; PN100; PN160; PN250; PN320; PN400. Class markings have 6 pressure levels: Class 150; Class 300; Class 600; Class 900; Class1500; Class 2500. Implementation standards include GB series (national standard), JB series (mechanical department), HG series (chemical department), ASME B16.5 (American standard), BS4504 (British standard), DIN (standard German), JIS (Japanese standard).
National standards: GB/T9112-2010, GB/T9119-2010, GB/T9116-2010, GB/T9115-2010
Standards of the Ministry of the Chemical Industry: HG/T20592-2009, HG/T20615-2009, HG5010-52~HG5028-58, HGJ44-91~HGJ{{ 5}}, HG20592-97
American Standard: ASME B16.5, ASME B16.47
Machinery Department Standards: 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/T{{5} } (JB/T4703), NB/T47024-2012 (JB/T4704)
