Molding Process
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HDPE pipe low welding strength
Problem Phenomenon
The butt fusion weld strength of HDPE pipe is insufficient.
Cause Analysis
Improper welding temperature/pressure/time three elements; uneven pipe end face, oxide layer not milled; wall thickness unevenness caused by sag also affects the weld.
Solution
①Standardize welding parameters; ②mill the pipe end flat; ③clean the end face; ④verify the weld bead quality.
Key Takeaway
Weld strength = end face treatment + parameter standardization.
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