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API 527 bubble size

API 527 bubble size

(OP)
Hi All,

Struggling with my geometry.

API 527 states a tube of 6.12 ID (7.9 OD x 0.89 WT) at a depth of 12.7mm under the water surface to measure the bubble leakage.

Although not stated in API 527 the bubble volume is 0.295 cm3, however using 4/3.pi.r^3 this does not equate to 0.295 cm3.

I dont imagine the depth of the water has a significant effect upon the bubble geometery, can someone explain where I'm going wrong or offer the solution please.

Thanks,
DT

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