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Views: 3 Author: Shirley Publish Time: 2025-05-06 Origin: Site
SMO 254Flanges are flange fittings made from an austenitic stainless steel alloy called SMO 254. This alloy contains higher levels of molybdenum, chromium, and nitrogen, providing exceptional resistance to corrosion, especially in highly acidic environments. SMO 254 Flanges are known for their excellent strength, impact resistance & low maintenance requirements. The benefits of SMO 254 Flanges include superior corrosion resistance, even in highly acidic and chloride-rich environments. They offer excellent strength and toughness, making them suitable for demanding applications. Additionally, SMO 254 Flanges require minimal maintenance, reducing downtime and operating costs. Their exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking ensures the reliability and longevity of the system, making them a preferred choice in corrosive environments.
SMO 254 Flanges are made up of an austenitic stainless steel with 19% chromium, 17% nickel and 6% nickel with copper and sulfur in the composition. This unique composition provides the material with high mechanical properties. JN Alloy is a leading supplier and manufacturer of these flanges. The Class 150 SMO UNS S31254 Flanges belong to one of the lower classes among a range of classes ranging from 150 to 2500 and PN6 through PN64. They are strong and corrosion resistant to most corrosive media, especially to chloride ion rich media. There are different types of flanges such as the 254 SMO Orifice Flange and others. All these flanges are strong with 650MPa minimum tensile strength and 300MPa minimum yield strength. The ANSI B16.5 ASTM A182 SMO 254 Blind Flange is one of the types used specifically to close a piping connection. The flanges belong to the specification ASTM A182. They could be specified according to different specifications such as the SMO Werkstoff No 1.4547 Slip-On Flanges as well.
There are other structural types such as the 254 SMO RTJ Flange which is essentially a pair of rings connected to each pipe end. We also supply the SMO 254 Weld Neck Flange and any other custom designs as per customer requirements. Please contact us to know more about these flanges and their prices. We, JN Alloy, an ISO enterprise, always focuses on providing you the with the best quality products and services. We aim to serve premium products, customer-centric service, complete assistance and a quick product delivery strategy. We go the extra mile to meet all our customer's requirements. We are a manufacturer, supplier and exporter of SMO 254 Flanges in a number of specifications, class, schedule, grade and size to meet the demands of your industry.
254 SMO Weld Neck Flanges | Stainless Steel S31254 1.4547 Paddle Blank Flanges |
UNS S31254 F44 WNRF Flanges | ASTM A182 SMO 254 Paddle Spacer Flanges |
Alloy 254 6mo Slip On Flanges | SMO 254 Duplex Spectacle Blind Flanges |
254 SMO Stainless Steel SORF Flanges | 1.4547 Stainless Steel Nippo Flanges |
F44 UNS S31254 Spectacle Blind Flanges | ASTM A182 UNS S31254 Lap Joint Flanges |
Stainless Steel S31254 1.4547 Socket Weld Flanges | 254 SMO Screwed (SCRD) Flanges |
ASTM A182 SMO 254 SWRF Flange | UNS S31254 F44 LJ Flange |
SMO 254 Duplex Blind Flanges | Alloy 254 6mo Closet Flange |
1.4547 Stainless Steel BLRF Flange | 254 SMO Stainless Steel Companion Flange |
ASTM A182 UNS S31254 Threaded Flanges | F44 UNS S31254 Pipe Flange |
254 SMO Forged Flanges | Stainless Steel S31254 1.4547 Blank Flange |
UNS S31254 F44 Plate Flange | ASTM A182 SMO 254 Exhaust Flange |
Alloy 254 6mo Orifice Flange | SMO 254 Duplex Girth Flange |
254 SMO Stainless Steel High Hub Flanges | 1.4547 Stainless Steel Quick Flange |
F44 UNS S31254 Flat Flange | ASTM A182 UNS S31254 Split Flange |
Stainless Steel S31254 1.4547 Loose Flanges | 254 SMO Swivel Flange |
ASTM A182 SMO 254 Square Flange | Industrial UNS S31254 F44 Flange |
SMO 254 Duplex Ring Type Joint Flanges | 254 SMO Stainless Steel Reducing SORF Flanges |
1.4547 Stainless Steel RTJ Flange | F44 UNS S31254 SORF Flange RTJ |
ASTM A182 UNS S31254 Groove & Tongue Flanges | Stainless Steel S31254 1.4547 SORF Flanges with Hub |
254 SMO Expander Flanges | ASTM A182 SMO 254 SORF Flange 150# |
UNS S31254 F44 Screwed Flanges | SMO 254 Duplex WNRF Reducing Flanges |
Alloy 254 6mo Awwa Flange | 1.4547 Stainless Steel WNRF RTJ Flange |
254 SMO Stainless Steel Long Weld Neck Flanges | ASTM A182 UNS S31254 WNRF Flange Class 300 |
Alloy 254 SMO Flanges , also known as UNS S31254 or 6Mo Flanges , is a high-performance stainless steel designed to withstand extremely corrosive environments. Its carefully balanced chemical composition enhances both its corrosion resistance and mechanical properties, making it ideal for use in challenging conditions.
Major Elements
Chromium (19.5-20.5%): Enhances general corrosion resistance by forming a protective passive layer.
Nickel (17.5-18.5%): Improves ductility and overall corrosion resistance.
Molybdenum (6.0-6.5%): Increases resistance to pitting and crevice corrosion, particularly in chloride-rich environments.
Nitrogen (0.18-0.22%): Boosts resistance to corrosion in specific areas and strengthens the alloy.
Copper (0.50-1.00%): Adds extra protection against corrosion in environments containing chlorides and enhances durability.
Minor Elements
Minor elements like carbon, manganese, silicon, phosphorus, and sulfur are carefully controlled to maintain the alloy’s mechanical properties and corrosion resistance. For example, low carbon content reduces the risk of carbide precipitation during heating, while manganese and silicon improve weldability and strength.
Standards | ASTM A182 / ASME SA182 |
Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
Size | 1/2" (15 NB) to 48" (1200NB) |
Class | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
Flange Face Types | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
Alloy 254 SMO flange is highly beneficial for the marine and offshore industry due to its strong resistance to pitting and crevice corrosion in salty, high-chloride environments like seawater.
Marine Structures and Seawater Desalination Systems: This alloy is extensively used in constructing marine structures, including ship hulls and offshore platforms, as well as in seawater desalination plants. Its high corrosion resistance ensures long-term durability and reliability in these applications.
Offshore Oil and Gas Platforms: The strength, toughness, and corrosion resistance of Alloy 254 SMO flange make it ideal for critical components in offshore oil and gas extraction, such as risers, flowlines, and production tubing.
Alloy 254 SMO flange is highly valued in the chemical and process industries for its ability to resist corrosion in extreme environments.
Chemical Processing Plants: It is employed in reactors, columns, and heat exchangers, where it withstands aggressive chemicals and high temperatures.
Pulp and Paper Plants: In the pulp and paper industry, Alloy 254 SMO is used in bleaching systems and scrubbers, ensuring long service life and reduced maintenance.
Oil Refineries: Its strong resistance to sulfur makes it perfect for key equipment in oil refineries, such as desulfurization units.
Food and pharmaceutical industries use Alloy 254 SMO for its corrosion resistance and hygienic properties.
Food Processing: The alloy is used in food processing equipment, such as mixing tanks, piping, and heat exchangers, where it resists chemical cleaning agents and maintains the purity of food products.
Medical and Pharmaceutical Plants: In pharmaceutical manufacturing, Alloy 254 SMO is employed in reactors, centrifuges, and storage tanks, providing a corrosion-resistant and clean environment essential for producing high-purity products.
In the energy and power sector, Alloy 254 SMO flange’s properties are leveraged for high-performance applications.
Fossil Fuel Power Stations: The alloy is used in power station components, such as boiler tubes and superheaters, where its high strength and resistance to high-temperature corrosion are critical.
Nuclear Reactors and Power Plants: Alloy 254 SMO flange is suitable for use in nuclear reactors and power plants, offering the necessary strength, toughness, and resistance to radiation-induced corrosion.
