Piping fabrication repair rates are usually calculated and used as benchmarks for quality. The two most commonly used rates are the "butt rate" (butts repaired vs. butt tested) and "linear rate" (length repaired vs. length tested).
Is there any industry standard repair rates for piping for both "butt rate" and "linear rate" for carbon steel, stainless steel, duplex stainless steel, inconel, and CuNi materials?