Molding Process
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PVC Chemical Resistance Advantage
Fenómeno do problema
PP used for chemical pipeline fittings was corroded by the medium; after switching to PVC, service life doubled
Análise das causas
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
Solução
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
Conclusão principal
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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