Processing Machinery
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Random copolymer polypropylene pipe special material (Nordic standard） pipe pressure resistance test unqualified（Variant: Strengthened Measures）
Problembeschreibung
The pipe ruptures or leaks in the hydraulic test, and the pressure resistance is substandard.
Unqualified pressure resistance directly threatens pipe use safety and is a fatal defect in water supply and gas pipelines.In particular, extra attention is needed on top of the original basis, this problem is more prominent and requires key attention.
Ursachenanalyse
（1）Pipe wall thickness insufficient or uneven\
（2）Material degradation causes molecular weight decrease\
（3）The pipe contains bubbles or impurities\
（4）Unsuitable crystallinity, poor mechanical properties\
（5）Melt plasticization insufficient, poor welding\
（6）On top of the original basis, extra attention is needed: process parameter fluctuations or equipment status changes aggravate this problem
Lösung
（1）Check and adjust the pipe wall thickness, ensure the wall thickness at all parts is uniform and up to standard\
（2）Control the extrusion temperature within the 200-220°C range to avoid material degradation\
（3）Fully dry the raw material, ensure the raw material is clean\
（4）Optimize cooling conditions, ensure suitable crystallinity of the random copolymer polypropylene pipe special material (Nordic standard）\
（5）Optimize screw design, ensure full plasticization\
（6）And strengthen process monitoring; on top of the original basis, extra attention is needed, paying special attention to parameter stability
Wichtigste Erkenntnis
Unqualified pressure resistance is caused by insufficient wall thickness, material degradation or internal defects, and needs to be systematically solved from process and material quality.Targeted preventive measures need to be taken in different production scenarios.
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