Steel Pipe Flanges and Fittings

A steel flange is a pipe connection component manufactured from a steel material such as carbon steel, stainless steel, alloy steel, or nickel alloys. The selected material should align with the application, operating conditions, and project specifications. Twinco Industrial offers steel flange options for industrial piping, pipeline, petrochemical, testing, construction, and maintenance applications.

A flange pipe fitting connects sections of piping or joins pipe to equipment through a flanged, usually bolted, interface. Common configurations include weld neck, slip-on, blind, lap joint, socket weld, threaded, and API flanges. Selection involves the required connection type, flange face, material, size, pressure class, and applicable standard.

Common flange fitting types include weld neck, slip-on, blind, lap joint, socket weld, threaded, and API flanges. Flange faces may include raised face, flat face, ring-type joint, or seal ring groove configurations. The appropriate type depends on the piping design, connection method, isolation or testing requirement, material, and pressure specification.

A flange creates a practical connection point between pipe sections, valves, vessels, and other equipment. Its bolted design supports installation, disassembly, inspection, maintenance, pressure testing, and system isolation. Blind flanges are commonly used to close piping or isolate process systems during hydrostatic testing, maintenance shutdowns, inspections, and construction work.

Yes. Twinco Industrial provides flanges through both rental and purchase options. Rental blind flanges support hydrostatic testing, vessel and process-system isolation, maintenance shutdowns, turnarounds, and pipeline projects. Customers can also request purchased flanges and related components for new construction, industrial piping systems, petrochemical projects, and ongoing maintenance.

Available flange offerings include ASME B16.5 and ASME B16.47 Series A and B standards, along with API standards and stated ASME pressure classes. Materials include carbon steel, stainless steel, alloy steel, duplex, and nickel alloys across the listed products. Rental studs and nuts include specified ASTM materials, with finishes available for selected applications.