Air Tightness Testing Methods for Pneumatic Fenders
Air tightness is a critical performance indicator for pneumatic fenders, directly affecting their durability, energy absorption, and operational reliability. To ensure high product quality and long-term performance, several testing methods are commonly applied to evaluate air tightness.
1. Pressure Drop Method
- Inflation and Stabilization: Inflate the fender according to the specified working pressure and allow it to rest until the internal pressure stabilizes.
- Pressure Monitoring: Observe the pressure gauge for abnormal pressure drops. A continuous decrease indicates poor air tightness or a possible leak.
2. Air Tightness Tester Method
- Positive-Pressure Inflation: Use a professional air tightness tester to inflate the fender to a preset pressure, with the filling process controlled by solenoid valves.
- Stabilization Stage: After closing the inflation valve, record the initial stabilized pressure (P1).
- Leakage Evaluation: Monitor the pressure change (△P) throughout the test. If △P exceeds the allowable limit or the pressure cannot reach the required standard, the fender is considered non-compliant.
- Deflation: Release all internal air after testing for further inspection or processing.
3. Soapy Water Bubble Method
- Apply Soapy Water: Brush a layer of soapy water evenly on the surface of the fender.
- Leak Detection: Observe whether continuous bubbles form at any point while the fender is pressurized. Pay special attention to pinholes, seams, and critical areas.
- Surface Cleaning: Clean the fender surface after testing to remove residues.
4. Long-Term Pressure-Holding Test
- Pressure Retention: Inflate the fender and maintain the pressure for at least 48 hours.
- Result Assessment: If the internal pressure shows no significant drop over time, the fender passes the test. Otherwise, further leak inspection is required.
5. Real-Time Monitoring with Pressure Sensors
By installing high-precision pressure sensors, the internal pressure of the fender can be continuously monitored. Combined with data analysis software, this method enables precise assessment of leakage rates and helps locate potential leak points, making it one of the most accurate testing solutions available.
Nanjing Deers Industrial Co., Ltd
Tel:86-25-84507790
Fax:86-25 84660486
Whatsapp:+86 13376094258
Email: benny@chinarubberfender.com