Stainless Steel (SS) flanges (e.g., 304, 316) offer high corrosion resistance, strength, and durability for chemical and food industries. Carbon Steel (CS) flanges (e.g., ASTM A105) provide high strength and cost-efficiency for oil, gas, and high-pressure, non-corrosive, or structural applications. Both are available in various types (weld neck, slip-on, blind). Stainless Steel (SS) Flanges Key Features Composition: Contains chromium, nickel, and sometimes molybdenum for superior corrosion resistance. Common Grades: SS 304 (general-purpose, food-grade), SS 316 (enhanced corrosion resistance, marine use). Applications: Chemical processing, water treatment, pharmaceutical, and high-temperature environments. Key Advantage: Long-lasting in harsh environments with minimal maintenance. Carbon Steel (CS) Flanges Key Features Composition: Primarily iron with carbon, offering high structural strength. Common Grades: ASTM A105 (most common), ASTM A350 for low temperatures. Applications: Oil and gas pipelines, steam lines, construction, and general waterworks. Key Advantage: Cost-effective, sturdy, and well-suited for high-pressure, non-corrosive environments. Common Flange Types (Applicable to both SS & CS) Weld Neck: Suitable for high pressure/temperature with a tapered hub. Slip-On: Slides over the pipe, usually cheaper than weld neck. Blind: Used to seal the end of a pipe system. Socket Weld: For small-diameter, high-pressure piping.