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When it comes to selecting the right flange for a piping system, it is important to understand the differences between raised face (RF) and flat face (FF) flanges. These two types of flanges have distinct features and applications. In this article, we will explore the characteristics of raised face and flat face flanges, their benefits, and the factors to consider when choosing between them.
The raised face flange is the most popular type of flanged faces. As the name suggests, it has a raised surface above the bolting circle where the gasket is placed. This raised area surrounds the pipe bore, providing a sealing surface. The purpose of the raised face is to focus more pressure on the smaller gasket area, enhancing the pressure containment capabilities of the joint.
Raised face flanges are versatile and suitable for use in various applications, including high and low temperatures and pressures. They are commonly found in process plant applications. Pressure ratings of raised face flanges dictate the dimensions. Increasing the pressure ratings involves increased flange diameter, number of bolts and flanges thickness as well raised faces.
II. Flat Face Flange:
The flat face flange, on the other hand has no raised area. The flange surface is flat across the entire face, where the gasket sits. The purpose of the flat face flange is to avoid the bending moment that occurs when the bolts are torqued. This is particularly important for materials such as cast iron and fiberglass, which can easily break under such stress.
Flat face flanges are commonly used on low-pressure and temperature applications such as water piping system. They are good for pump suctions and water treatment flanges as well. A no raised face makes it easier to install as there is no need for alignment of the gasket.
III. Gaskets to Seal Flanges:
There are two types of gasket can be used – full-face and ring-type to seal both raised face flanges, as well were a flat face flange.
A full-face gasket is typically used with flat face flanges, although it can also be used with raised face flanges. The outer diameter of the flange is identical to factory, and this gasket seats on top of where the raised flange faces butt together. Has holes for the bolts to facilitate precise alignment. The full-face gasket extends over the outside diameter of the flange for enhanced protection against dirt and contaminants.
A ring-type gasket can be usable either with raised face or flat face flanges. It sits around the pipe bore and inside the flange bolts. Its position is on the raised surface for Raised face flanges. The ring-type gasket is a drop-in gasket which can be inserted into the joint without having to disassemble it. This gasket is smaller in size and requires less material as well as cutting than full-faced gaskets but it could be a little more difficult to clamp into position.
When selecting the appropriate flange face, several factors should be considered:
1.Pressure And Temperature: In high pressure and temperature applications, RF Flanges are the better choice as they provide improved pressure containment capabilities. FF flanges are more suitable for lower pressure and temperature environments.
2.Material Compatibility: You will also need to consider the particular materials which are used in your system, and ensure that the Tree Removal flange face you chose is compatible. This will prevent issues such as corrosion or degradation.
3.Application Based Requisites – Determine specific necessities of the application like kind of fluid, flow rate and operating conditions It will decide which flange- RF or FF, is most suitable for it.
Qingdao Fluido is a prominent manufacturer specializing in industrial valves and flanges, known for its commitment to high-quality products tailored to customer needs. Their offerings include both raised face and flat face flanges, suitable for a wide range of industrial applications.
Qingdao Fluido adheres to international standards during its production processes, ensuring that each flange exhibits excellent corrosion resistance and thermal stability. With advanced manufacturing techniques and stringent quality control measures, the brand continuously improves product performance, earning the trust and support of its clients. Additionally, Qingdao Fluido is dedicated to providing comprehensive solutions, including technical consultation and after-sales service, to meet the diverse needs of its customers.
