ANSI/ASME B16.5 & B16.47 Tongue and Groove Flange

What is Tongue and Groove Flange?

A Tongue and Groove Flange is a specialized type of pipe flange designed for a secure and leak-proof connection in piping systems. The unique joint configuration resembles the interlocking connection of a tongue and groove, providing a reliable sealing mechanism. This design is particularly effective in preventing leaks under various pressure conditions.

Tongue and groove flanges are chosen for their ability to provide a secure and durable connection, meeting the stringent requirements of industrial applications. It's important to adhere to industry standards, such as ASME, DIN, EN, or other relevant specifications, to ensure the proper design and dimensions of tongue and groove flanges for specific use cases.

Key characteristics of Tongue and Groove Flanges

1. Joint Configuration:

   • The flange features a raised portion (tongue) on one side and a corresponding groove on the mating side. When these flanges are connected, the tongue of one flange fits into the groove of the other, creating a tight and interlocking joint.

2. Sealing Mechanism:

   • The tongue and groove design ensures an effective sealing mechanism, making it suitable for applications requiring leak-proof connections. This design is commonly used in systems handling liquids or gases.

3. Applications:

   • Tongue and groove flanges are widely used in various industries where positive sealing is crucial. They offer reliability under both low and high-pressure conditions, making them suitable for diverse applications.

4. Pressure Classes:

   • Available in different pressure classes, tongue and groove flanges accommodate a range of operational pressures. The pressure class indicates the maximum working pressure the flange is designed to withstand.

5. Materials:

   • Manufacturers produce tongue and groove flanges from materials such as carbon steel, stainless steel, alloy steel, and others. Material selection depends on factors like the conveyed fluid, temperature, and corrosion resistance requirements.

6. Facing Types:

   • Tongue and groove flanges come with different facing types, with raised face and flat face being common options. The facing type influences the sealing surface and compatibility with gaskets.

7. Installation:

   • Installation involves aligning the tongue with the groove and securing the flanges using bolts. The interlocking nature of the joint ensures proper alignment during installation.

The Main Components of A Tongue and Groove Flanged Joint Are?

Tongue:

The tongue is a raised, protruding portion on one of the flanges. It is typically machined or formed to interlock with the corresponding groove on the mating flange. The tongue plays a key role in creating a secure and leak-resistant connection.

Groove:

The groove is a recessed, complementary feature on the mating flange that receives the tongue. When the tongue is inserted into the groove, it forms an interlocking joint that helps prevent leaks. The groove is designed to match the shape and dimensions of the tongue.

Facing:

The facing of the flange refers to the surface where the gasket is placed to ensure a proper seal. In tongue and groove flanged joints, the facing may be raised or flat, depending on the specific requirements of the application. The facing type influences the choice of gasket and the sealing characteristics of the joint.

Gasket:

A gasket is placed between the facing surfaces of the tongue and groove flanges to provide a tight seal. The gasket material is chosen based on factors such as the type of fluid or gas being conveyed, temperature, and pressure conditions.

Bolts and Nuts:

Bolts and nuts are used to secure the two flanges together, compressing the gasket and creating the necessary pressure to form a leak-resistant joint. The number, size, and material of the bolts and nuts depend on the flange size and the pressure class of the joint.

Flange Faces:

The flange faces refer to the outer surfaces of the flanges that come into contact with each other during assembly. The flange faces, along with the tongue and groove features, contribute to the overall integrity and strength of the joint.