Twin-Strand PVC Pipe Extrusion: Prove It With Your Own Compound
For a twin-strand PVC pipe line rated for 20–63 mm pipe, make the demonstration run on the buyer's own PVC compound and check both strands against agreed pipe samples before acceptance.
Ask the supplier to run the demonstration on your own PVC compound, not a house blend, and to produce pipe at the small and large ends of the 20–63 mm range. A twin-strand line splits output across two heads, so confirm whether both strands can run your material simultaneously and whether each strand's pipe meets your dimensional and surface requirements.
In the request for quotation, state the compound you will supply, the pipe sizes and wall thicknesses to be demonstrated, and how long the run must last. Ask how the listed 250–300 kg/h maximum output and 105 kW total power were determined, and whether those catalog figures are reference values for the model family rather than guarantees for the unit offered. Request that output be recorded per strand during the trial.
For the acceptance test, agree in advance how samples are taken from each strand, how often, and which measurements decide pass or fail. Include a check that both strands remain stable when one is stopped or restarted, if your production plan requires that.
Before requesting a quote, confirm with the supplier what compound quantity and conditioning the trial needs, which pipe sizes will be demonstrated, how per-strand output and quality will be measured, and what acceptance criteria will be written into the contract.