FAT Checks for a Twin-Strand PVC Pipe Extrusion Line
How buyers can turn the pipe diameter range, output figures and power rating into practical pass or fail checks during a factory acceptance test.
For a twin-strand PVC pipe extrusion line, the central FAT decision is whether both strands run together at the agreed output while producing pipe inside the 20–63 mm range. Agree in the RFQ which diameter and wall thickness will be run, and whether the 250–300 kg/h figure is a combined or per-strand value; the brief lists it only as a maximum output, so treat it as a reference point to confirm, not a guarantee.
Ask the supplier to state the test recipe, screw speed, haul-off speed and cooling conditions, then witness a run long enough to show stable dimensions on both strands. Useful pass or fail checks include: pipe outside diameter and wall thickness measured against the agreed tolerance at set intervals; visual checks for surface defects, ovality and weld-line quality; and a record of output weighed over a defined period. Confirm how the 105 kW total power is measured and whether it covers both extruders and auxiliaries.
Before requesting a quote, confirm with the supplier which pipe sizes and outputs the FAT will cover, how output and power are defined and measured, what instrumentation and records are provided, and who supplies material and witnesses the test.