Metal flanges are mechanical parts that join two or more elements of a piping system, be they valves, pumps, or other pipes. The method of tightening flanges is due to the perforated neck where bolts are placed in radial sequence so that a leak-free coupling is achieved. For this reason, it is also called a perforated metal flange or, in smaller sizes, screw metal flanges.
Since its invention, its application has been generally industrial, highlighting its application in the oil and gas industry, which is why it is common to find large metal flanges. Because they are subjected to high-pressure fluid systems, they must resist high-temperature heat. There are standardized metal flanges to function in all the industries that require them. They are metal flanges that meet international quality and safety standards.
Types of metal flanges
Until now, A105 Flange manufacturer produces different types of metal flanges, and these are the metal flanges for pipes that are manufactured under strict control. However, under the metal flange, there are also pieces for the fastening of steel cables, stainless steel cables, and conduit tubes, among others, which could be grouped under metal clamps.
Metal pipe flanges
Over the years, different types of metal flanges from ss 304 flanges manufacturer in india have been created to meet specific requirements depending on the industry or type of system in which it is applied. Beyond flange measurements, the variation of flange types lies in the shape of the parts of a flange: the flange, the neck, or the mating face features. ss 304 pipe fitting manufacturer india can produces the following main types:
Welding Neck Flanges
They are long metal flanges whose main characteristic is a neck that must be welded to one of the tubes, remaining fixed at that end while the coupling face with bolts remains at the other. They are recommended in high pressure or temperature systems with corrosive, toxic, or flammable fluids.
Slip On Flanges
These adjustable metal flanges are the most used due to their easy assembly with flange nuts. They only require sliding over the tube and are fixed by double fillet welding internally and externally. Alignment is easier and does not change the length of the tube. Its use is limited to low pressures and temperatures with a lower installation cost.
Flanges with seat for welding (Welding Socket)
They have a flanged seat into which the tube sits. The joint is finished with external welding and has the advantage of not creating interruptions or turbulence in the pipeline. Its application covers low and high pressures and temperatures, but the diameter limits it since they are metal flanges for pipes no larger than 3”.
Blind flanges (Blind)
This type of safety metal flange is a cover when closing pipe terminals, either for later replacement or maintenance. Its use is recommended together with the neck ones for high-pressure networks. astm a420 wpl6 pipe fittings manufacturer produces this type of flanges.
Threaded Flanges
They can be large metal flanges and withstand high pressures and temperatures. Still, they are not recommended in systems with these changes to avoid leaks due to the expansion and deformation of the metal.
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