Unlike other mechanical connectors, because the flange can be disassembled quickly and easily, the flange can be used instead of the welding connection for maintenance operations. Therefore, they are often used for temporary or mobile installations, piping system disassembly, transitions between dissimilar materials, or connections in areas that are not suitable for solvent cementing.
Because they are cost-effective, easy to understand, reliable, and available from various suppliers, they are the most common mechanical connectors. Likewise, their moment-carrying capacity is much more important than other connectors, which makes them very suitable for systems where lateral buckling or pipe walking occurs due to pressure and temperature changes.
Basically, a pipe flange is a flange, flange, or rib used to connect two pipes, a channel, and any assembly equipment. They come in different types and can be designed to meet various application requirements and functions, including corrosion resistance and high temperature. They are relatively simple and have proven effective in high-pressure pipeline applications.
Before purchasing a suitable flange, the required strength of the flange connection must be considered, as this will determine the correct pipe flange size and type.
There are mainly six different types of flanges. However, these designs can be modified to meet the requirements of specific functions and applications. Therefore, it is necessary to understand the pressure at the marked joints, the required strength and the pipe size involved. With the correct information, individuals can choose six types of flanges. These include:
In addition, according to the application and function, the flange can be modified to other types. These unique designs can meet specific needs and applications, such as reducing flange size to adapt to size requirements and orifice flanges to match orifice installation. Other examples in this category include:
They have a long tapered hub that helps transfer pressure from the flange to a single pipe and provides strength enhancement to resist sagging. Its sturdy structure enhances strength and rigidity, making it suitable for temperature and pressure fluctuation ranges, and is an ideal choice for high temperature/low pressure and high pressure pipelines.
They are mainly used to seal the ends of pipes or valves. Their surface is round and has no central hole, so they are very suitable for plugging pipes. Likewise, they are designed to fit standard channels of various sizes and higher pressure rates than other types.
They are easier to connect to pipes than other types. They are screwed into the hole according to the external thread of the pipe and gradually become thinner to form a seal between the pipe and the flange. Therefore, the process does not require welding.
They are suitable for small pipes and low pressure connections. However, they cannot withstand very low or highly fluctuating temperatures. In order to improve efficiency, flanges need to operate at a temperature not higher than 260 degrees Celsius and not lower than ˗40 degrees Celsius.
They are most commonly found in galvanized street pipes and have previously been used in the production of synthetic ammonia. They are not suitable for any system that may cause cyclic loading, crevice corrosion or severe corrosion. When using them, it is also important to avoid large loads and high torques.
This design of the flange slides at the end of the pipe and then welds it in place. They provide a simple and cost-effective way to install and are suitable for low-voltage applications. Due to easy alignment, other applications include non-purified compressed air and circulating water.
Their main application is on pipes with overlapping short ends. They will never come into contact with the medium, and are easy to rotate around the tube, and the bolt holes can be easily aligned and assembled even after welding. Therefore, they are ideal for systems that require frequent assembly of pipes and flanges. Because they do not contact the medium, they are more suitable for pipelines containing corrosive liquids, and are most suitable for saving non-ferrous metals, stainless steel and other valuable corrosion resistant materials.
They are the best choice for high pressure, small pipelines. Slip-in flanges are made larger than them, but their internal recesses provide better fluid flow and smooth holes. When internally welded, the fatigue strength of these flanges is 50% higher than the strength of their double welded slidable flanges.
In addition to the six main types of flanges, as we mentioned earlier, most other special types of flanges have been modified to meet specific functions and applications. These include:
Welding flange is a combination of welding neck flange and weldolet. Unlike most flanges where special flanges are connected together by welding, flange welding is made of a single piece of forged steel
nipoflange is mainly used for branching pipelines. It is made of welded neck flange and forged Nipolet.
Swivel flanges have various standard shapes, including lap joints, sockets, welding necks, etc. Its main application is to align the bolt holes between double mating flanges, thereby helping to install large diameter pipelines, including offshore and offshore pipelines. Subsea pipeline or shallow water pipeline.
They are ideal for gas, hydrocarbon, chemical, petroleum, water and other fluids that are challenging in water management and petrochemical applications.
They are the least common type of flange olets. Elboflange is a combination of letletlet and flange, while latroflange is a combination of lattrolet and flange. They provide assistance in applications that require a 45-degree branch pipe.
As the name suggests, shrinking flanges can help reduce holes in pipes from one point to another, or to connect pipes to other mechanical equipment, including compressors, pumps, or valves with different inlet sizes.
The reducing flange can only reduce the running pipe diameter by two sizes. If this is not enough for the application, then consider a final alternative solution combining butt reducer and standard flange. If reducing flanges can provide the desired results, they will be better in terms of cost.
They work as reducing flanges in an alternating manner. They are useful in extending the hole of a pipe from a given point to another point. Like the reducing flange, the reducing flange can only increase the hole by two sizes.
The most common way to classify flanges is to consider the shape of the flange. However, it must be understood that there are other ways to classify flanges, because these methods are very useful when there is a question about durability, function and application. These include:
The plane or flush surface of the flange is perpendicular to the connected pipe. The attachment process involves the use of bolts, adhesives, collars or welding to mechanically connect two or more surfaces.
Due to the requirements for accessories, flanges must be suitable for the equipment or pipes for which they are designed. Therefore, all possible specifications and dimensions must be checked to ensure that they are of the correct size, type and material.
Laila Azzahra is a professional writer and blogger who likes to write articles about technology, business, entertainment, science and health.
Post time: Mar-09-2021