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Discharge Pipe Resonance Fracture — Excessive Support Spacing
Likely causes
Support spacing exceeds 1.5m — vibration load concentrated on copper pipe
Check: Measure actual support spacing — 1/2" copper: exceed 1.0m threshold; 3/4" and above: exceed 1.2m threshold; fracture typically within 30mm downstream of bracket
What to do: Readjust support spacing (1/2" → 1.0m, 3/4"+ → 1.2m); replace fractured copper pipe, nitrogen test at 600kPa for 24h; touch pipe during startup to verify vibration is resolved
No flexible joint installed near compressor — vibration transmitted directly to piping
Check: Check if flexible hose is installed within 300mm of compressor discharge; if absent, verify that vibration transmits throughout discharge line
What to do: Install flexible hose within 300mm of compressor discharge outlet; replace brackets with anti-vibration clamps with rubber inserts
Systems with fracture history: recheck all supports 3 months after restart; fatigue fractures show characteristic beach marks (clam shell pattern) on the fracture surface
All 565 cases work offline in R-Pro, with error codes for 62 brands and P-T data for 108 refrigerants.
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