How are gasket sizes measured?

The Ring Gasket is the possibly the most common shape of gasket. It is also the easiest to measure. Simply measure the diameter of the inside of the circle – also called and inside diameter or I.D. Then, measure the diameter the outside of the circle, also called the outside diameter- or O.D.

How thick is a flange gasket?

The most commonly used thicknesses for Standard Flange gaskets are 1/16″ and 1/8″.

What is a full face flange gasket?

A full face gasket covers the entire face of the flange. This means it has the same outer diameter measurement as the flange, and will also have the necessary holes for the securing bolts pre-cut into the gasket. Positioning the gasket is made easier with the presence of the securing bolt holes.

How is a full face gasket measured?

Full Face Gasket Use a tape measure or ruler and measure across the gasket from the 9:00 position to the 3:00 position. Measure the inside edges for the I.D. and the outside edges for the O.D. Next, count the number of BH (Bolt Holes) around the face of the gasket.

How do you measure the diameter of a flange?

First, to measure the standard pipe flanges, measure the outer diameter of the flange (O.D.). It can be achieved by measuring from the outer edge of the flange to the opposite outer edge and then measuring the flange’s inner diameter from these two outer reference points.

How thick is a pipe gasket?

Common thicknesses of gasket material for pipe flanges are 1.5mm and 3mm.

Can you use a full face gasket on a raised face flange?

The full-face gasket is typically used with flat face flanges but can also be used with RF flanges. It sits on the raised flange faces but has the same outside diameter of the flange. For that reason, it has to have holes for the bolts securing the flanges to pass through.

Can you use a raised face flange with a flat face flange?

Flat face flanges are never to be bolted to a raised face flange. ASME B31. 1 says that when connecting flat face cast iron flanges to carbon steel flanges, the raised face on the carbon steel flange must be removed, and that a full face gasket is required.

How do you find the area of a gasket?

When measuring a circular gasket, think of it as a clock. Use a tape measure or ruler and measure across the gasket from the 9:00 position to the 3:00 position. Measure the inside edges for the I.D. and the outside edges for the O.D. Next, count the number of BH (Bolt Holes) around the face of the gasket.

What gasket thickness should I use in my flange system?

Apply a continuous bead of silicone to the mating surface.

What are the types of flange gaskets?

Types of flange gaskets: Standard pipe flange gasket line includes two basic styles: Ring Type and; Full Face; Both ring type and full face pipe flange gaskets are available in both low and high pressure options.

What is the size of a flange?

The types are based on the material from which they are made, that is aluminum, copper, brass, stainless steel, plastic, and cast iron. The sizes also range from a four by three, four-inch, or three inches flange. Each of these choices has its features, advantages, and disadvantages.

How to select the right flange gasket?

Flange face type and dimensions