Which measurement is used specifically for long radius elbows in relation to face and center?

Which measurement is used specifically for long radius elbows in relation to face and center?

• A. NPS x 1.5
• B. NPS x 1.2
• C. NPS x 2.0
• D. NPS x 0.5

Answer: (A)

For long-radius elbows, the distance from the face of the fitting to the centerline is defined by multiplying the Nominal Pipe Size by 1.5. This 1.5x factor accounts for the gentler bend and standardizes how far the centerline sits from the face across sizes, helping with proper alignment and clearance when assembling or welding. For example, a 4-inch NPS elbow has a face-to-center distance of 4 x 1.5 = 6 inches. Other multipliers don’t reflect this standard long-radius face-to-center dimension, though different measurements exist for other fittings or contexts.

For long-radius elbows, the distance from the face of the fitting to the centerline is defined by multiplying the Nominal Pipe Size by 1.5. This 1.5x factor accounts for the gentler bend and standardizes how far the centerline sits from the face across sizes, helping with proper alignment and clearance when assembling or welding. For example, a 4-inch NPS elbow has a face-to-center distance of 4 x 1.5 = 6 inches. Other multipliers don’t reflect this standard long-radius face-to-center dimension, though different measurements exist for other fittings or contexts.