Short answer
Root cause analysis of a hose failure investigates use, assembly, material and operating conditions together, rather than simply labeling the damage as a product defect. The final point of rupture may not be where the failure started or where the sole cause lies.
Technical explanation
Manufacturer safety resources treat incorrect selection, overpressure, improper bending, torsion, abrasion and environmental effects as separate risks. These effects can occur together. Declaring a definitive root cause from a photograph is not sufficient in most cases; the assembly history, fluid information and a physical sample that can be examined are required. An uncontrolled pressure event can also affect an assembly that appears sound.
Topic-specific checkpoints
| Item | Description |
|---|---|
| Event | Time, conditions and last interventions |
| Evidence | Photographs, sample and measurement records |
| Hypothesis | Possible cause and supporting finding |
| Action | Temporary correction and permanent prevention |
How to evaluate it in practice
First apply the authorized operating procedure that makes the area safe; then preserve the evidence. Before cleaning or cutting the hose, document its position and connection orientations. Collect recent operational changes, pressure records and maintenance interventions. Separate possible causes into proven, possible and excluded. Fitting a new hose may be a correction; a routing or process change that prevents recurrence is a separate action.
Original editorial recommendation; not a clause of a standard.
Frequently asked questions
If the hose has pulled out of the fitting, is it definitely a crimping error?
Crimping is one possibility; wrong components, tension, pressure events and service conditions must also be investigated.
Source coverage
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S017
Parker Safety Guide, Publication 4400-B.1 Parker Hannifin · accessed 2026-10-20 PDF page 3; 3.7 Minimum Bend Radius, 3.8 Twist Angle and Orientation and 3.13 Routing | PDF page 4; 5.1 Maintenance Programme, 5.2 Visual Inspection, 5.3 Other Inspection and 5.6 Hose Inspection and Failure | PDF page 2; 2.2 Pressure | PDF page 2; 2.9 EnvironmentPDF page 4; 5.1 Maintenance Programme, 5.2 Visual Inspection, 5.3 Other Inspection and 5.6 Hose Inspection and Failure | PDF page 3; 3.1 Component Inspection, 3.2 Hose and Fitting Assembly and 3.3 Related Accessories | PDF page 2; 2.5 Fluid CompatibilityPDF page 3; 3.1 Component Inspection, 3.2 Hose and Fitting Assembly and 3.3 Related Accessories | PDF page 2; 2.2 Pressure
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S036
Industrial Hose Safety Connections Gates · accessed 2026-10-19 PDF pp. 6–8 construction and selection; pp. 10–19 maintenance; pp. 21–27 special services