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ANSI standard flange dimensions are designated as 150, 300, 400, 600, 900, 1500, and 2500, in sizes NPS 1/2 through NPS 24.

The term “flange” comes from the Old French word “flanchir” which means “to bend”. Flanges have long been used to connect pipes and cylinder-shaped fixtures. While primarily used in plumbing, flanges can also be found in train wheels and camera lenses.

The most common flange types are: Welding Neck Flange. Slip-on Flange. Socket Weld Flange.

Flanges are helpful to connect pumps, valves, pipes, and other parts to form a piping system. Flanges are typically welded or thread screwed to connect. The use of flanges allows a person for maintenance and easy repair of the pipe system.

A flange is the protruding rim that enable pipes, valves and other equipment to form a connection. Flanges also increase strength at the joint. They enable you to create a piping system while also allowing for fast disassembly.

The key difference between 304 vs 316 stainless steel that makes them different is the addition of molybdenum, an alloy that drastically enhances corrosion resistance, especially for more saline or chloride-exposed environments. 316 stainless steel contains molybdenum, but 304 does not.