Processing Machinery
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Polyolefin plastomer pipe pressure resistance test unqualified (Variant: Enhanced Measures)
Fenómeno del problema
The pipe ruptures or leaks in the hydraulic test, and the pressure resistance performance is not up to standard.
Unqualified pressure resistance directly threatens the safety of pipe use and is a fatal defect in water supply and gas pipelines.
In particular, additional attention is needed on the original basis; this problem is more prominent and requires focused attention.
Análisis de la causa
（1）The pipe wall thickness is insufficient or uneven
（2）Material degradation causes the molecular weight to decrease
（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 welding is poor
（6）On the original basis, additional attention is needed: fluctuations in process parameters or changes in equipment status have aggravated this problem
Solución
（1）Check and adjust the pipe wall thickness to ensure the wall thickness of each part is uniform and up to standard
（2）Control the extrusion temperature within the range of 180-230°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 the crystallinity of the polyolefin plastomer is appropriate
（5）Optimize the screw design to ensure sufficient plasticization
（6）And strengthen process monitoring; on the original basis, additional attention is needed to pay special attention to parameter stability
Conclusión clave
Unqualified pressure resistance is caused by insufficient wall thickness, material degradation, or internal defects, and needs to be solved systematically from process and material quality.
Targeted preventive measures need to be taken in different production scenarios.
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