Processing Machinery
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Pressure test failure of random copolymer polypropylene pipe special material pipes (Variant: strengthened measures)
Fenómeno del problema
The pipe breaks or leaks in the hydraulic test, and the pressure resistance is not up to standard.
Pressure test failure directly threatens the use safety of the pipe, and is a fatal defect in water supply and gas pipelines.
In particular, extra attention is needed on the original basis, this problem is more prominent and needs key attention.
Análisis de la causa
（1）The pipe wall thickness is insufficient or uneven
（2）Material degradation leads to a decrease in molecular weight
（3）There are bubbles or impurities in the pipe
（4）The crystallinity is inappropriate, and the mechanical properties are poor
（5）The melt plasticization is insufficient, and the fusion is poor
（6）On the original basis, extra attention is needed: process parameter fluctuations or equipment status changes have aggravated this problem
Solución
（1）Check and adjust the pipe wall thickness to ensure that the wall thickness of each part is uniform and up to standard
（2）Control the extrusion temperature within the range of 200-220°C to avoid material degradation
（3）Fully dry the raw material to ensure the raw material is clean
（4）Optimize the cooling conditions to ensure appropriate crystallinity of random copolymer polypropylene pipe special material
（5）Optimize the screw design to ensure sufficient plasticization
（6）And strengthen process monitoring; on the original basis, extra attention is needed, with special attention to parameter stability
Conclusión clave
Pressure test failure is caused by insufficient wall thickness, material degradation, or internal defects, and needs to be systematically solved from process and material quality.
In different production scenarios, targeted preventive measures need to be taken.
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