The formula, not a rule of thumb
ENGAGE calculates minimum allowable wall thickness to ASME B31.3 as t = PD / [2(SEW + PY)], where P is internal design pressure, D outside diameter, S allowable stress, E the quality factor, W the weld joint strength reduction factor and Y the design code coefficient, all held against your pipe classes and materials.
Two corrosion rates, one honest projection
The historic rate runs from the first reading to the last; the present rate uses the last two readings. ENGAGE projects the date each CML reaches MAWT at both, so accelerating corrosion stands out.
Reports from live data
Wall Thickness and Inspection Summary reports for a circuit or vessel are generated from the same data, with trend charts comparing multiple features and projecting to minimum allowable thickness.
