Direct answer The most reliable furnace-part failure analysis uses several evidence types together: an intact or labeled failed sample, clear photographs, measurements from defined datums, the current drawing, installation records, operating history, and previous inspection or repair records. No single photograph or symptom usually proves the cause. Evidence becomes stronger

Direct answer Document a failed heat-treatment furnace part in five layers: identify the part, preserve its orientation, photograph the whole and damaged areas, measure from useful datums, and add installation and operating history. Keep observations separate from suspected causes. A supplier can make a better replacement or inspection plan when

Direct answer When a heat-resistant casting shows a defect, record the observable symptom before naming a root cause. Photograph its location and scale, measure the affected area, identify the part orientation, and compare the condition with the drawing and manufacturing record. Cracks, porosity, surface irregularity, distortion, and dimensional deviation can

Direct answer A useful furnace-roll inspection record separates what is visible from what is suspected. Record the roll identity and orientation, line position, wear location and pattern, crack location, surface condition, runout, support and bearing observations, drive condition, and recent line changes. Add photographs and measurements from defined datums. Only

Direct answer Inspect furnace-roll runout by first confirming the roll’s orientation, datum, supports, bearing condition, drive interface, and measurement setup. Measure the body and shaft features listed as critical on the drawing, then record runout at agreed locations with the method and instrument identified. Note wear, cracks, grooves, contact marks,