Standard Practice for Leaks Using Bubble Emission Techniques

Importancia y uso:

6.1 The immersion technique is frequently used to locate leaks in sealed containers. Leaks in a container can be seen independently. Leak size can be approximated by the size of the bubble. It is not suitable for measurement of total system leakage.

6.2 The liquid film technique is widely applied to components and systems that can not easily be immersed and is used to rapidly locate leaks. An approximation of leak size can be made based on the type of bubbles formed, but the technique is not suitable for measuring leakage rate. It can be used with a vacuum box to test vessels which cannot be pressurized or where only one side is accessible.

6.3 Accuracy—This practice is not intended to measure leakage rates, but to locate leaks on a go, no-go basis. Their accuracy for locating leaks of 4.5 × 10 ⁻¹⁰ mol/s (1 × 10⁻⁴ Std cm³/s)2 and larger is ±5 %. Accuracy for locating smaller leaks depends upon the skill of the operator.

6.4 Repeatability—On a go, no-go basis, duplicate tests by the same operator should not vary by more than ±5 % for leaks of 4.5 × 10 ⁻⁹ mol/s (1 × 10⁻⁴ Std cm³/s).2

6.5 Reproducibility—On a go, no-go basis, duplicate tests by other trained operators should not vary by more than 10 % for leaks of 4.5 × 10 ⁻⁹ mol/s (1 × 10⁻⁴ Std cm³/s)2 and larger.

Subcomité:

E07.08

Referida por:

D5641_D5641M-16, D3078-02R21E01, D3078-02R21E01, F1973-21, F1948-20, E0543-21, E2533-21, E0543-21

Volúmen:

03.03

Número ICS:

19.100 (Non-destructive testing)

Palabras clave:

bubble leak testing; film solution leak test; immersion leak test; leak testing; vacuum box leak testing ;