Molding Process
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PVC Chemical Resistance Advantage
Fenómeno del problema
PP used for chemical pipeline fittings was corroded by the medium; after switching to PVC, service life doubled
Análisis de la causa
PVC has excellent resistance to acids, alkalis and most chemicals, and is the standard material in the fluid handling field; its chemical resistance spectrum complements PP, and PVC is more reliable in strong acid and strong alkali scenarios
Solución
①Prioritize PVC in chemical fluid scenarios; ②conduct compatibility verification according to medium concentration and temperature; ③leverage chemical resistance advantages for pipes, valves and fittings; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusión clave
Chemical resistance is the foundation of PVC; for material selection in the fluid handling field, PVC is an answer verified over a hundred years; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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