How many types of flanges are there?

How many types of flanges are there?

5 are: Welding Neck, Slip On, Socket Weld, Lap Joint, Threaded and Blind flange. Below you will find a short description and definition of each type, completed with an detailed image.

How do I know what flange I have?

You need to find the outer diameter, the inner diameter, the number of bolt holes, bolt hole diameter, and the bolt circle diameter. Bolt circle diameter (B.C.) is one of the most important measurements to make when identifying a flange.

What are the two main types of flanges available?

We usually consider two main families of flanges, the standard flanges and the special ones.

What is the classification of flanges?

The ASME pressure classes for flat-face flanges are Class 125 and Class 250. The classes for ring-joint, tongue and groove, and raised-face flanges are Class 150, Class 300, Class 400 (unusual), Class 600, Class 900, Class 1500, and Class 2500.

How do I choose a flange?

Guidelines for Selection of Various Types of Flanges

1. Pressure Temperature Rating of Flanges.
2. Flange Dimensional Standards.
3. Flange Facings.
4. The bore of Welding Neck Flanges and Hub Design.
5. Flange Material Limitations.
6. Iron Flanges.
7. Carbon Steel Flanges.
8. Low and Intermediate Alloy Steel Flanges.

What is the difference between RF and FF flange?

Flat face (FF) flanges are similar to the RF flanges, but they do not have the raised area like the RF flange. Instead, the whole surface is flat. They are commonly used in low temperature and pressure environments such as pump suctions or water treatment flanges.

What is the difference between ASME and DIN flanges?

RE: DIN Standard Flanges vs ASME Flange Ratings DN is not short for DIN, but in metric units is the same as ND for ASME pipe and fittings. Hence DN 150 is directly equivalent to 6″ pipe. PN on the other hand is max pressure rating in barg. This goes in the sets 2.5, 6,10,16,25,40,64,100.

What is slip on flange?

Slip on Flange is essentially a ring that is placed over the pipe end, with the flange face extending from the end of the pipe by enough distance to apply a weld bead on the inside diameter. Slip on flange may also be used a lap joint flanges if Type B or Type C stub ends are used.

What is FF flange?

Flat faced flange, abbreviated as FF, is a flange that is machined flat and does not have a ridge like a raised face or ring type joint flange. The flat surface allows for the gasket to have full contact with the entire mating surface. Usually gaskets are made from non-metallic materials such as EPDM or Viton.

What is the difference between RF and RTJ flange?

Answer: RF means “Raised Face.” RTJ means “Ring Type Joint.” RF flanges seal with a flat gasket, formerly made of asbestos but now made of more environmentally friendly material, designed for installation between the raised faces of two mating flanges (both with raised faces).

Is ASME same as ANSI?

ANSI establishes and accredits performance and quality standards for products and services in a wide variety of sectors, while ASME is primarily focused on boilers and pressure vessels.

What do the different types of flanges look like?

How do they look like? The key types of flanges are the welding neck, long welding neck, slip-on, socket weld, lap joint, threaded and blind flanges. In addition to these standard flanges, some special ones exist, called Weldoflange/Nipoflange and Elboflange, swivel flange, expander/reducer flange, and orifice flanges.

What are the different types of weld neck flanges?

A weld neck flange (also known as a high-hub flange and tapered hub flange) consists of a circular fitting with a protruding rim around the circumference. There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant.

Which is the best flange for socket weld?

Slip-On Flange is suitable for low pressure and temperature application. This type of flange is available in large size also to connect big bore piping with storage tank nozzles. Socket Weld Flanges are used for small-size and high-pressure piping that do not transfer highly corrosive fluids.

What do you use to connect two flanges?

Bolts are used to connect two flanges which are typically attached to pipe ends with a gasket in between.