MSS-SP-83 is a standard developed by the Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry. It focuses on Class 3000 and 6000 pipe unions, specifically for socket welding and threaded connections. The standard covers essential aspects like dimensions, finishes, tolerances, testing, marking, materials, and performance requirements. It applies to unions made from carbon steel, alloy steel, stainless steel, and nickel alloys, ensuring consistent quality and compatibility in their production and use.
Socket weld fittings connect with pipe to transport air, water, natural gas, oil, and steam in plumbing applications and food and dairy processing. Socket weld (SW) fittings attach by inserting the pipe into the recessed area of the fitting. The pipe and the fitting are square cut for easy fillet welding and installation. Stainless steel is durable, resists corrosion from caustic chemicals, corrosive fluids, oils, and gases, and withstands pressure and high temperatures.
Class 3000 socket weld fittings connect with high-pressure (1000-3000 psi) pipe. Socket weld (SW) fittings attach by inserting pipe into the recessed area of the fitting. The pipe and the fitting are square cut for easy fillet welding and installation. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.
Class 6000 socket weld fittings connect with high-pressure (1000-3000 psi) pipe. Socket weld (SW) fittings attach by inserting pipe into the recessed area of the fitting. The pipe and the fitting are square cut for easy fillet welding and installation. Type 304 stainless steel, a chromium-nickel material, resists corrosion caused by water, heat, saltwater, acids, minerals, and peaty soils. Type 316 stainless steel has a higher nickel content than 304 stainless, plus molybdenum, for even greater corrosion resistance.
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Maximum Operating Pressure: 3000 psi
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Standards: ASME SA182; MSS SP-83