DISINTEGRATION OF QUICK COUPLINGDISINTEGRATION OF QUICK COUPLING

THE RESULT: SIGNIFICANT WATER DAMAGE

THE RESULT: SIGNIFICANT WATER DAMAGE

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

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

Failure of 4” QC due to corrosion

Which was caused by water seeping from the Pipe. .

Water Damage to stored Books.

The Quick-Coup.

The Quick-Coup.

The bolt was consumed by the Corrosion

The 4” Pipe: Extensive Corrosion

Imperfection enabled water seeping below the Seal.

Example No. 2- Surface Imperfection causing Leakage below the Seal

Example No. 2- Surface Imperfection causing Leakage below the Seal

Imperfection in the Pipe Seam.

Imperfection in the Pipe Seam.

Imperfection in the Pipe Seam.

Water Seeping Direction

The Result: Multiple Dripping

Case No. 3- Internal Leakage causing disintegration Case No. 3- Internal Leakage causing disintegration

The Bolt Was Destroyed by Corrosion

The Bolt Was Destroyed by Corrosion

The QC was just Replaced. The Cause remained.

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

Too Deep Groove helped the failure.

Bolt Was Left Open

The Contractor did not close the QC properly leaving a significant Gap between the two parts of the QC

Case No. 5- Disengaging 2” Pipe from 2” Quick Coup Causes Significant Water Damage in Apartment in High Rise Building

2” Pipe within the Gypsum wall in an apartment. Following a repair of a failed QC

The 2” Pipe section and the QC were replaced

Too deep Grooves.

Too Deep Groove caused the Dis-engagement

Pressure exceeded 225PSI