What is the formula for a rolling offset?

Answer 1

In pipefitting, a rolling offset is used to connect two pipes that are not aligned in the same plane. The formula for calculating a rolling offset involves using trigonometry, specifically the Pythagorean theorem and the tangent function. The formula is: Offset = (Travel x tan(Angle)) + (Run / 2), where Travel is the vertical distance between the two pipes, Angle is the angle of the offset, and Run is the horizontal distance between the two pipes.

Answer 2

Offset=Square Root of Roll squared+ Rise squared

For Example:

To find the travel and run for a 45 degree rolling offset with a roll of 11.5 inches and a rise of 15.5 inches:

Solution Steps:

Offset= Square Root of 11.5 inches squared +15.5 inches squared

Offset= Square Root of 132.25 inches+240.25 inches

Offset= Square Root of 372.5 inches

Offset= 19.3 or 19 5/16 (closest 16th of an inch)