disintegration of quick coupling · significant water damage. common causes 1. imperceptible...
TRANSCRIPT
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DISINTEGRATION OF QUICK COUPLINGDISINTEGRATION OF QUICK COUPLING
THE RESULT: SIGNIFICANT WATER DAMAGE
THE RESULT: SIGNIFICANT WATER DAMAGE
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COMMON CAUSESCOMMON CAUSES
1. Imperceptible Leakage attacking one of the QC Bolt
2. Shallow Groove causing QC to remain partly open.
3. QC that was not fully closed.
4. Groove Too Deep.
5. Pressure Surge.
6. Combination of the above
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Case No. 1- Surface Imperfection causing Leakage below the Seal and resulting 4” QC Failure
Case No. 1- Surface Imperfection causing Leakage below the Seal and resulting 4” QC Failure
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Failure of 4” QC due to corrosion
Which was caused by water seeping from the Pipe. .
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Water Damage to stored Books.
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The Quick-Coup.
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The Quick-Coup.
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The bolt was consumed by the Corrosion
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The 4” Pipe: Extensive Corrosion
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Imperfection enabled water seeping below the Seal.
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Example No. 2- Surface Imperfection causing Leakage below the Seal
Example No. 2- Surface Imperfection causing Leakage below the Seal
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Imperfection in the Pipe Seam.
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Imperfection in the Pipe Seam.
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Imperfection in the Pipe Seam.
Water Seeping Direction
The Result: Multiple Dripping
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Case No. 3- Internal Leakage causing disintegration Case No. 3- Internal Leakage causing disintegration
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The Bolt Was Destroyed by Corrosion
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The Bolt Was Destroyed by Corrosion
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The QC was just Replaced. The Cause remained.
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Case No. 4- Disengaging 4” Pipe from 4” Quick Coup Causes Significant Water Damage
Case No. 4- Disengaging 4” Pipe from 4” Quick Coup Causes Significant Water Damage
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Too Deep Groove helped the failure.
Bolt Was Left Open
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The Contractor did not close the QC properly leaving a significant Gap between the two parts of the QC
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Case No. 5- Disengaging 2” Pipe from 2” Quick Coup Causes Significant Water Damage in Apartment in High Rise Building
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2” Pipe within the Gypsum wall in an apartment. Following a repair of a failed QC
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The 2” Pipe section and the QC were replaced
Too deep Grooves.
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Too Deep Groove caused the Dis-engagement
Pressure exceeded 225PSI