Materials & Standards

Types of Flanges

Domax offers a wide variety of flanges to suit different piping needs. Key flange types include:

• Weld Neck Flange: Has a long tapered hub, which helps distribute stress evenly. Ideal for high-pressure and high-temperature applications.
• Slip-on Flange: Slips over the pipe and is welded both inside and outside. More economical and suited for moderate pressure systems.
• Socket-Weld Flange: The pipe is inserted into a recessed “socket” and then fillet-welded. Suitable for small bore and high-pressure applications.
• Threaded Flange: Has internal threads for screwing onto a pipe; no welding required. Ideal for systems where welding is difficult or not allowed.
• Blind Flange: A flat, solid disc without a bore, used to seal pipe ends or pressure vessel openings.
• Lap Joint Flange: Used together with a stub end; allows for easy alignment and disassembly.
• Reducing Flange: Connects pipes of different sizes (i.e., flanges with different bore diameters). Commonly used when there is a change in pipe diameter.

Types of Fittings

In addition to flanges, Domax manufactures a wide range of forged fittings, including:

• Elbows (90° / 45°)
• Tees (equal / reducing)
• Crosses
• Couplings, Unions, and Adapters
• Caps, Plugs, and Bosses
• Reducers (concentric / eccentric)

These fittings are available in socket-weld, threaded, and butt-weld variants, conforming to industry standards like ASME B16.11.