The purpose of a RF flange is to concentrate more pressure on a smaller gasket area and thereby increase the pressure containment capability of the joint. Diameter and height are in ASME B16.5 defined, by pressure class and diameter. Pressure rating …

2022年11月5日 · The flange face is the surface area that hosts the gasket. The 6 available types of flange face are flat (FF), raised (RF), ring joint (RTJ), lap joint, male and female (M&F), tongue and groove (T&G). Flanges with different faces require different gaskets and shall never be mated to prevent leakage of the joint.

2017年9月20日 · The two main types of non-asbestos gaskets for flanges are the “full face” (FF) for FF flanges and the “flat ring” type for raised face flanges (RF). These two key sub-types are shown in the image below:

Instead of bolt holes, these gaskets have tines that easily fit around flange bolts to ensure they’re properly aligned with pipe openings. The tine design also means you won’t have to retorque the flange for alignment, saving time.

The gasket type used with FF flanges is usually a full-face gasket. Advantages: Simplifies alignment during installation due to the flat surface. Ideal for low-pressure, low-temperature applications. Reduces the risk of flange warping or cracking under bolt pressure. Disadvantages:

2021年4月20日 · Gaskets suitable for raised face sealing surface flanges include various non-metallic flat gaskets, coated gaskets; metal-wrapped gaskets; spiral wound gaskets (including outer ring or inner and outer ring). The two types of sealing surfaces, Male Face and Female Face, are a pair, one female and one male. They must be used together.

2024年12月31日 · In high-pressure environments, Class 600 RF (Raised Face) flanges paired with spiral wound gaskets ensure a durable and safe seal. The raised face of the flange allows for more effective compression of the gasket, enhancing its sealing capability.

2025年1月5日 · Spiral wound gaskets compliant with ASME B16.20 Class 2500 for RF flanges feature a construction that includes a combination of winding materials such as 316L stainless steel and flexible graphite filler, ensuring high-temperature …

The main difference between RF and RTJ flanges and other flange face lies in their sealing mechanism, appearance, installation, requirement of maintenance and more. RF flanges typically used in systems with low or medium pressure and temperature areas.

Ring Gasket fits inside the bolt area of a flange and is typically used on raised-face (RF) flange.It can be dropped into a flange assembly without fully disassembling the joint. Full-Face Gasket covers the full surface area of the flange with holes to insert and align the flange bolts.The joint must be fully disassembled to install.