STAINLESS STEEL SS FLANGE

Stainless steel flanges are highly regarded for their corrosion resistance, strength, and durability. They are used in various industries, including chemical processing, oil and gas, and food and beverage, where resistance to oxidation and staining is critical. Here’s a comprehensive overview of stainless steel flanges, including specifications and grades:1. Stainless Steel Flange Grades and SpecificationsCommon Stainless Steel Grades:1. Grade 304(1.4301)/304L(1.4306/1.4307): o Chemical Composition:? Carbon: 0.08% max? Manganese: 2.00% max? Silicon: 1.00% max? Chromium: 18.00-20.00%? Nickel: 8.00-10.50%2. Grade 316 (1.4401)/316L (1.4404):o Chemical Composition:? Carbon: 0.08% max? Manganese: 2.00% max? Silicon: 1.00% max? Chromium: 16.00-18.00%? Nickel: 10.00-14.00%? Molybdenum: 2.00-3.00%o Properties: Better corrosion resistance than 304, especially against chlorides. Ideal for marine and chemical environments.o Applications: Marine environments, chemical processing, medical devices.3. Grade 321:o Chemical Composition:? Carbon: 0.08% max? Manganese: 2.00% max? Silicon: 1.00% max? Chromium: 17.00-19.00%? Nickel: 9.00-12.00%? Titanium: 5 times the carbon contento Properties: Enhanced resistance to high temperatures and oxidation compared to 304 and 316. Stabilized with titanium.o Applications: High-temperature applications like exhaust systems and heat exchangers.4. Grade 347:o Chemical Composition:? Carbon: 0.08% max? Manganese: 2.00% max? Silicon: 1.00% max? Chromium: 17.00-19.00%? Nickel: 9.00-12.00%? Columbium (Niobium): 10 times the carbon contento Properties: Similar to 321 but with better resistance to intergranular corrosion due to the addition of columbium.o Applications: Applications in high-temperature environments and where resistance to intergranular corrosion is required.5. Grade 904L:o Chemical Composition:? Carbon: 0.020% max? Manganese: 1.50% max? Silicon: 1.00% max? Chromium: 19.00-23.00%? Nickel: 23.00-28.00%? Copper: 1.00-2.00%o Properties: Excellent corrosion resistance, especially in acidic environments, and high strength.o Applications: Chemical processing, oil and gas, and marine applications.2. Dimensions and Standards• Standards:o ASME B16.5: Covers dimensions, tolerances, and pressure-temperature ratings for flanges and flanged fittings up to 24 inches.o ASME B16.47: Applies to large diameter flanges, ranging from 26 inches to 60 inches.o ISO 7005: International standard for metallic flanges.o API 6A: For flanges used in the oil and gas industry.• Flange Types:o Weld Neck Flanges: Provide a strong connection through welding, ideal for high-pressure applications.o Slip-On Flanges: Easy to align and install, suitable for moderate pressure applications.o Blind Flanges: Used to seal the end of a pipe or vessel.o Socket Weld Flanges: Used for small-diameter pipes with high-pressure service.o Threaded Flanges: Have internal threads that screw onto the pipe; less common in high-pressure applications.• Dimensions:o Nominal Pipe Size (NPS): Typically from 1/2 inch to 24 inches in ASME B16.5; larger sizes are covered in ASME B16.47.o Pressure Classes: Standard pressure classes include 150, 300, 600, 900, 1500, and 2500.o Bolt Circle Diameter: Defined by flange size and pressure class.o Number and Diameter of Bolt Holes: Varies based on flange size and class.3. SPECFICATIONS:• Manufacturing Range: DN 15 (1/2”) to DN 1500 (60”)• Rating/Class: 150/300/600/900/1500/2500 & PN 10/16/25/40/63/100 etc.• Dimension Standard: ANSI/ASME B16.5/B16.47/B16.36/B16.48/DIN/EN 1092-1, etc.• Face Finish: Raised Face (RF) Finish, Flat Face (FF) Finish, Ring Type Joint (RTJ) Finish• Material Type: STAINLESS STEEL: ASTM A182 F304 (1.4301), F304L (1.4306/1.4307), F316 (1.4401), F316L (1.4404), F304H, F309S, F309H, F310S, F310H, F316TI, F316H, F316LN, F317, F317L, F321, F321H, F11, F22, F91, F347, F347H, F904L,  UNS S 31254 (1.4547)