What is the take off for a 8 butt weld elbow?

The take-off for an 8-inch butt weld elbow typically refers to the length of pipe that is required to accommodate the elbow's angle and diameter when calculating pipe runs. For a standard 90-degree elbow, the take-off is generally about 8 inches plus the radius of the elbow, which is typically 10 inches for an 8-inch elbow, resulting in a total take-off of approximately 18 inches. For other angles (like 45 degrees), the take-off measurements would differ accordingly. Always consult specific piping codes or standards for precise measurements.