When it comes to hoses, determining the source of the failure can be difficult.
Facts About Diagnosing Hose Failures
Andrasik explains that there are many factors that you must understand when encountering a hose failure. All of these conditions must be considered when determining the cause of the failure.
- Hose failures are time, temperature, and stress development.
- Failure modes are unknown until you test
- Service conditions often vary and so will the results
- In complex applications, it can be impossible to fully replicate the service condition in an accelerated test
- Failure mechanisms are not always progressive, a stepwise change in properties can occur.
In his talk, Andrasik goes on to explain some of the common conditions that can cause a failure including construction or design flaws, improper assembly, or incompatible environment. He also explains the corresponding test methods used to determine the source of the failure. The major categories for hose evaluations include Pressure testing, Temperature Aging, Vibration Testing, and Fluid Compatibility.
More to Consider
Along the typical industry standards and routine testing protocols, Andrasik also explains the various test setup considerations his team use to evaluate hose performance including: orientation of the part, torque, fluid exposure, motion during operation, etc.
The Value of External Testing
In summary, Andrasik illustrates the value of external testing to new product development efforts by demonstrating how the Smithers Rapra Testing Cost Comparison Calculator can be used to assess product and testing costs. He determines that with the addition of external testing, bottlenecks caused by internal testing delays can be reduced resulting in a positive effect to your bottom line.