Throat flange

What is a necked flange?

One of the most widely used types of flanges is the welded throat flange. Weld Neck Flange has a conical neck (Tapered Hub) shape. The end of the diameter of this neck is also the same as the diameter of the pipe. Necked flange is another name for this model of high pressure connections. This part is divided into two types of normal neck flange and long neck. Like other flanges, this piece is used to connect pipes and valves in piping. In this article, we intend to introduce you to this highly demanded piece in the high pressure fittings market.

Throat structure

One of the most obvious features of the Weld Neck Flange is its neck, which makes it easy to distinguish it from other flanges with a simple glance. This valuable connector, as the name suggests, connects to a cone-shaped connector. This throat condition increases the pressure tolerance of the flange. Its conical part is the same diameter as the disk on one side, which is welded to it in the same place. Its conical shape helps to gradually distribute the pressure force. This problem makes this flange model to be used in pressure, tension and high temperatures.

Flange welding process

As mentioned earlier, the inner part of the conical part of this flange is machined and polished to match the diameter of the pipe or other connections. This allows the piece to be welded perfectly to the pipe or other fittings. In the welding process, efforts are made to avoid any protrusions to prevent the passage of fluids in the welding place.

Material and type of welded neck flange

The throat flange is made of many alloys and materials. These materials are evaluated based on specific ASTM and ASME standards. But its most widely used material is carbon alloy. Perhaps one of the most important reasons for choosing this material is the resistance of carbon steel. In addition to carbon and carbon steel, steel is also produced and sent to the market. Also, in addition to stainless steel, the throat flange is also made with nickel.

Application of throat flange

Welded throat flange is generally used in piping lines to connect all kinds of pipes and fittings. This piece has the ability to connect to valves, refinery units, pumps and other connections. Due to having a throat section or a conical neck, this flange is suitable for use in high-pressure fluid transmission lines.

Note about use!

The use of throat flange in piping is often for high pressures. Hence, these flanges are usually ring faced.

Benefits of use

As mentioned, this flange has a conical section at its end, which is attached to a disc with a slight slope. In this way, this flange has the following advantages:

It has high resistance to compressive stresses.
It has good sealing against fluids.
It has high resistance in sub-zero and very low temperatures.
The installation cost of this high pressure connection is low.
It is suitable for use in the transmission lines of flammable and explosive materials.
Easily deforms.
Buy throat flange

It is very important to pay attention to the manufacturing standards as well as the quality of the material used in the purchase of this part. We at Alborz Part Jahanwarah always try to deliver the best welded flange to the market by taking these things into consideration.

The price of throat flange

All the things mentioned above have an effect on the price of the throat flange. These can be size, anti-corrosion and rust. So, to know its price, you can contact our colleagues and benefit from a free consultation.