Threaded Flange

What is a threaded flange?

The threaded flange (also called a ‘screwed flange’) uses a screw thread to connect the flange to a pipe. A male thread is cut onto a pipe end whilst a female thread is cut into the bore of the flange; the male threaded pipe is then screwed into the female threaded flange.

The pipe has a male thread, generally NPT per ASME B1.20.1.

Even though the threaded flange design is available in many sizes and pressure ratings, it is mainly used for small-sized piping systems. Its usage is also typically restricted to non-toxic systems, low pressure systems, and low temperature systems. ½ inch to 2-inch size threaded flanges are much more common than sizes of 2 inches and above. Due to their lower pressure applications, threaded flanges use flat and raised faces only. They are not suitable for high temperature applications because the thread geometry would distort, which often leads to leakage.

The major advantage of threaded flanges is that they can be connected to a pipe without the need for welding. Forming joints without needing to weld is a considerable advantage, and is essential in some locations and industries e.g., explosive areas (Ex rated areas) such as petrol stations, hexane plants, stores with flammable fluids etc.
If no welding is required, a potential source of ignition is removed.

Another advantage is that it is quicker and easier to assemble and disassemble a threaded flange joint than a welded flange joint.

Application

Threaded flanges are available in sizes up to 4 inches and multiple pressure ratings; however, they are used mostly, small size piping in low pressure and low-temperature applications, like water and air utility services.

Threaded flanges are also a mandatory requirement in explosive areas, such as gas stations and plants, as the execution of welded connections in such environments would be dangerous.

The production process of Rayoung threaded flange

Explore Our Range of Industrial Pipe Flanges and Solutions

As a trusted steel pipe fittings and flanges manufacturer, RAYOUNG offers a comprehensive range of products engineered to meet international standards, including:

Standards Complied With:
ASME、ANSI，gost, EN, BS, SANS, DIN, JIS.
Material :
Carbon Steel (ASTM A105, A350 LF2)
Stainless Steel (ASTM A182 F304/F316)
Alloy Steel (ASTM A694 F42-F70)
Duplex & Super Duplex (ASTM A182 F51/F53/F55)
Nickel Alloys (Inconel, Monel, Hastelloy)
Coated flange:
General coated flange: Black Painting, Anti-rust Oil, red Painting, Gold Painting
Specially coated flange:Epoxy coated flange, Galvanized flange, PP coated flange

Production of every flanges follows precise manufacturing processes to achieve leak-proof connections while strengthening durability and performance stability with high-pressure systems.