What is the take-off of 12" in 45° butt weld ells?

The take-off for a 12-inch 45° butt weld elbow is 7½ inches. This measurement represents the distance from the end of the pipe to the tangent point where the elbow begins to change direction. The standard calculations for take-offs are typically based on specific fittings, and for a 45° elbow, the take-off value can differ based on the nominal pipe size and the angle involved.

In the case of a 12-inch pipe and a 45° elbow, the common practice is to use established reference tables or formulas that provide these values. The 7½ inches take-off is derived from the geometry of the elbow, which allows for proper fitting and alignment in piping systems.

Understanding the correct take-off is essential for pipefitters as it ensures precise cuts and fittings that will lead to leak-free connections and an overall efficient piping system. Miscalculating the take-off could result in increased labor as adjustments would be necessary to accommodate any discrepancies.