Backing Rings

When joining two pipes, ensuring that they are properly aligned, held together, and to prevent leaks, a small piece of material called a backing ring is necessary. Backing rings can be either round, or square and are made typically from rubber or a metal such as chrome, carbon steel, or aluminum. Backing rings may also be referred to as an anti-extrusion ring or backup ring. A backing ring is applied by welding it between two pipes during the connection process.

When applying the backing ring, it is placed between two pipes to secure the joint being formed. The goal when welding is to ensure the backing ring has melted and become one with the pipe. You will know if you have applied the backing ring properly because solder will be prevented from penetrating through the pipes. It is important to be a skilled welder when applying backing rings to ensure a seamless and smooth connection is made, which no cracks or crevices are present.

The importance of a smooth crack free connection is of severe importance. Even the smallest of cracks or crevices, which may not be visible to the naked eye can create a home for bacteria, mold, or ions, such as chloride. Overtime, this will cause corrosion or leakage within your piping system.

Commonly applied in industries such as aerospace, construction, or automotive, backing rings are designed in many different types. The simplest backing rings consist of;

  • Plain backing rings
  • Machine-welded rings
  • Gasket rings

More advanced backing rings are labeled as flat, ridge, or grove type. The type of backing ring chosen for the application should depend upon the type of project at hand.

For more information on the proper type of backing ring needed for your job, or to place an order contact Detroit Nipple Works today. 1(888)698-7888