3 Inch Pipe Flange

A standard 3 inch, Class 150 flange typically uses four 5/8-inch diameter bolts, while a Class 300 flange typically requires eight 5/8-inch bolts. Bolt size and quantity vary by pressure class and flange facing type, so always verify against ANSI/ASME B16.5 tables or manufacturer specifications for your exact configuration.

A pipe flange is a component that connects pipes, valves, pumps, and other equipment to form a piping system, allowing for easy assembly and disassembly for cleaning, inspection, or modification. Flanges are typically welded or screwed onto the pipe end and joined using bolts and a gasket to create a sealed connection.

Our 3 inch pipe flanges are manufactured from carbon steel, chosen for its strength and durability in demanding industrial and pipeline environments. Carbon steel flanges offer good mechanical properties and cost-effectiveness for oil, gas, and water transport applications compared to alternative materials like stainless steel or brass.

Common flange facings include raised face (RF), flat face (FF), and ring-type joint (RTJ), each suited to different pressure and sealing requirements. Raised face is the most widely used for general industrial pipelines, while RTJ facings are typically reserved for high-pressure oil and gas applications requiring superior sealing performance.

Yes, carbon steel 3 inch pipe flanges are suitable for water, oil, and gas transport pipelines, as well as broader industrial fluid and gas management systems. Selection should account for the specific pressure class, temperature range, and chemical compatibility required by your particular application.

Yes, our team provides technical support and installation guidance to help you select the correct flange type, pressure class, and material for your pipeline system. We work with a distributor network to ensure you get the right part for upstream, midstream, or downstream applications.