Processing Machinery
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PVC Pipe Cracking
Problem Phenomenon
PVC pipes cracked after installation and use
Cause Analysis
Pipe residual stress or installation stress exceeds strength, and low-temperature brittleness also participates; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Reduce stress in pipe extrusion process; standardize installation to avoid brute force; select impact-resistant formulation for low-temperature environments; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
Pipe cracking must be prevented in three aspects: process, installation, formulation; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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