An elbow provides a change in material-flow direction. This adds pressure losses to the system due to impact, friction and re-acceleration.
As product enters the inlet of the elbow, it typically continues moving straight ahead to the first (or primary) impact zone. The product is then deflected at an angle toward the outlet of the elbow.
The deflection angle is determined by the elbow design, the product’s characteristics, the conveying velocity, and specific load (also called the product-to-gas ratio). In many designs, the product will hit one or more secondary impact zones before exiting the elbow.
There are several different types of material that are used in the manufacturing of pipe elbows. Some of which include:
Copper
Iron
Cast iron
Brass
Nickel
Aluminum
Bronze
Stainless Steel
Plastic