This article will look at some of the basics of reducing flanges and what you need to know about using them in various situations. We’ll also look at some of the most common reducing flange applications and discuss some of the standards and drawing symbols you’ll need to use when drafting these types of flanges.
Common flange standards
A reducing flange is a special flange that is used in pipe-to-pipe connections. It has a reduced bore to match the diameter of the smaller pipe. Reducing Flanges are usually available in blind, slip-on, or threaded. They are generally manufactured in alloy steel or carbon steel.
A reducing flange is usually fixed by welding equal-sized flanges together to make a connection. The two flanges are then glued. These flanges can be fabricated using a reducing spool.
The common standards for reducing flanges are DIN, ASME, and ANSI. Some flanges are created according to ISO specifications. Many flange distributors stock flanges that have been manufactured to these specifications.
Flanges can be made from many different types of metals. The most commonly used materials are carbon steel, “high-temp. carbon steel, ” and stainless steel. Other materials include cast iron and ductile iron. Usually, the materials that are used are listed under the ASME designation.
Weld neck, slip-on, or threaded flanges
Weld neck, slip-on, or threaded flanges are common when selecting the correct flange for your application. They are designed to work in both low and high-pressure applications. Some key features to look for include the material used, the manufacturing process, and the overall performance.
Slip-on flanges are similar to socket weld flanges. The main difference is that the Slip-on flange is fillet welded from the inside, whereas the socket weld flange is double-welded. But both flanges are available in various sizes, from small to very large.
Threaded flanges are very easy to install, but they are not recommended for use in high-pressure situations. Socket weld flanges have a higher fatigue strength, making them an excellent choice for smaller lines.
Weld neck flanges are recognizable by the long tapered hub that gradually tapers from a bolted connection to the pipe. Because they are welded to the pipe, they are compatible with high-pressure and subzero temperatures. This provides increased joint integrity and strength.
Standard reducing flange drawing symbols
Reducing flanges are designed to change the size of a pipe. They are often used to connect valves, pumps, and compressors. These flanges are available in several different styles. Some of these are forged, while others are manufactured from cast steel.
These flanges are usually manufactured as slip-on flanges. The stub end of the flange is welded to the pipe, while the other end is inserted along the OD on top of the hub. This type of flange is especially suitable for low-temperature applications.
Another reducing flange is the Weld Neck flange. This is a flange that features a 37.5-degree angle. It will also have a 1/16″ landing at the point of the weld. A threaded reducing flange has a matching male thread on the inside. This flange type can be manufactured from stainless steel or standard carbon steel. Reducing Flanges are manufactured according to the ASME B16.5 specification. These flanges are available in classes from 150 to 2500.
Common reducing flange applications
A reducing flange is an alternative to connecting two different pipe sizes. It has a smaller bore than the larger pipe and is attached to the smaller size by either gluing or clamping. They are commonly used in installations with limited space.
Flanges can be manufactured in various materials, including stainless steel, carbon steel, or ductile iron. The flange’s face is either raised or flat. Depending on the flange type, the face may have a ring, depression, or other dimensional feature.
Flanges are used to connect valves in the pipework. Also, their rounded ends allow a good seal. These joints are very reliable and can hold any desired pressure. Reducing flanges are particularly suitable for applications where the pipes are changing diameters. However, they should not be used for pump applications.
Reducing flanges are also known as slip-on flanges. This type of flange has a straight-through ID and can be used for reducing connections. As a result, they are prevalent for use in liquid pipelines.