Aging Test Of Safety Valves In UV Aging Chamber

According to the requirements of EN 14129:2024 Liquefied Petroleum Gas Equipment and Accessories - Pressure Relief Valves for Liquefied Petroleum Gas Pressure Vessels, LPG pressure relief valves need to undergo high and low temperature ultraviolet aging tests. Below, we will provide an overview of this test.

Pressure Relief Valve High and Low Temperature Ultraviolet Test:

Test Equipment: Huanyi Instruments High and Low Temperature Ultraviolet Aging Chamber

Test Standard: EN 14129:2024 Liquefied Petroleum Gas Equipment and Accessories - Pressure Relief Valves for Liquefied Petroleum Gas Pressure Vessels

Test Conditions:

1. Test Temperature: Cyclic between -20 and 60°C

2. Ultraviolet Radiation: The energy received by the sample shall be (65±10) W/m²; the wavelength range shall be (360±40) nm.

3. Rainwater: Rainwater shall be tested under the following conditions:

a) Deionized water with a resistivity greater than 250 Ωm;

b) The water shall be neutral, with a pH of 7±0.2;

c) A suitable device shall be used to simulate heavy rain, generating small water droplets. The water shall be incident on the sample at an angle of 30° to 45°;

d) The flow rate of the water droplets shall be sufficient to keep the sample moist.

Aging parameters:

1) Time 0~10min, Temperature 20℃ (constant temperature), Humidity 96%.

2. Time 10~50min, Temperature 20℃→-20℃, cooling rate 1℃/min, Humidity 96%→0%.

3. Time 50~90min, Temperature -20℃ (constant temperature), Humidity 0%.

4. Time 90~127.5min, Temperature -20℃→55℃, heating rate 2℃/min, Humidity 0%→95%.

5. Time 90~127.5min, Temperature 55℃ (constant temperature), Humidity 95%.

6. Time 187.5~190min, Temperature 55℃→60℃, heating rate 2℃/min, Humidity 95%→40%.

7. Time 190~250min, Temperature 60℃ (constant temperature), Humidity 40%, Irradiation 65W/㎡.

8. Time 250~290 min, temperature 60℃→20℃, cooling rate 1℃/min, humidity 40%→96%.

9. Time 290~300 min, temperature 20℃ (constant temperature), humidity 96%.

10. Time 300~340 min, temperature 20℃→-20℃, cooling rate 1℃/min, humidity 96%→0%.

11. Time 340~380 min, temperature -20℃ (constant temperature), humidity 0%.

12. Time 380~420 min, temperature -20℃→60℃, heating rate 2℃/min, humidity 0%→40%.

13. Time 420~1400 min, temperature 60℃ (constant temperature), humidity 40%, irradiation 65 W/m².

14. Time: 1400~1440 min; Temperature: 60℃→20℃, cooling rate: 1℃/min; Humidity: 40%→96%.

After 1000 hours of operation, the pressure relief valve should operate stably for 48 hours at (20±5)℃ and (50±5)% humidity.