stainless steel flange304It is one of the most widely used stainless steel flanges, each stainless steel has good performance in its specific field of application. The first thing is to figure out the purpose of the flange and then determine the correct grade of stainless steel. Commonly used stainless steels are 304, 304L, 316, 316L, etc. They all contain chemical components such as chromium and nickel. If molybdenum is added, atmospheric corrosion, especially resistance to chloride-containing atmosphere. 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 closelyte connected, flange connection refers to the flange, joint and bolt three interconnected as a set of detachable connection combined sealing structure, pipe flange refers to the flange used in the piping device, used in the equipment refers to the inlet and outlet flange of the equipment.
304 stainless steel flange is made of SUS304 material forging, and other commonly used stainless steel materials at home and abroad are: (304, 304L, 316, 316L, S30408, S30403, S31608, S31603, SUS304, ASTM A403, TP321, TP317L, 347, 0Cr18Ni9, 00Cr19Ni10, 00Cr17Ni14Mo2, 1Cr18Ni9Ti, 06Cr17Ni12Mo2, 022Cr17Ni12Mo2, etc. );
Commonly used 304 stainless steel flange types and codes: 1, PL plate flat weld flange, 2, SO with neck flat weld flange, 3, WN neck butt weld flange, 4, weld flange SW socket, 5, Th thread flange, 6, BL flange cover, 7, figure eight blind, 8, PJ/SE with neck butt weld ring loose sleeve flange, 9, ring loose sleeve flange PJ/PR flat weld, 10, reducing flange, 11, stainless steel flange, 12, pressure vessel flange, 13, American standard flat weld flange, 14, American standard SO with neck flat weld flange, 15, American Standard WN with Neck Butt Weld Flange
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 implementation standards for flanges: 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 standards: ASME B16.5, ASME B16.47
Machinery Department Standards: JB81-59~JB86-59, JB/T79-94~JB/T86-94, JB/T74-1994
