What is the take-off for three 3" long radius 90° elbows?

To determine the take-off for three 3" long radius 90° elbows, it's essential to understand what is meant by "take-off" in piping. Take-off typically refers to the additional length that the fittings add to a pipe run. For long radius 90° elbows, the take-off can be calculated by considering the radius and the angle of the elbow.

A 90° elbow has a take-off that roughly equals the diameter of the pipe multiplied by a factor for long radius fittings. For a long radius elbow, the take-off is often estimated as the diameter of the pipe plus half of the diameter for the elbow itself. This means each 90° elbow would approximately require 1.5 times the nominal diameter for the take-off calculation.

For a 3” long radius elbow, the take-off would be:

• For each elbow: 1.5 x 3" = 4.5"

• For three elbows: 3 x 4.5" = 13.5".

However, it seems there was a slight misinterpretation, as often the take-off is calculated simply based on the diameter alone, leading to just 1.5 times the number of elbows in consideration.

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