G - Physics – 01 – M
Patent
G - Physics
01
M
73/118
G01M 3/28 (2006.01) G01M 3/02 (2006.01) G01N 3/12 (2006.01)
Patent
CA 1198295
ABSTRACT OF THE INVENTION A method of performing hydraulic pressure test of tubes in which the step of filling a test tube with water is separated from the step of performing hydraulic pressure test of the tube, comprising the steps of sealing a test tube by using closing caps at the respective opposite ends of the test tube which has been filled with water under the completely air-purged condition; holding the closing caps during conveyance of the test tube with the opposite ends thereof sealed by the closing caps, to a position at which the test tube is subject to the steps of hydraulic pressure test; sealing to prevent the filled water from leaking; introducing high pressure water in the hydraulic pressure test step with the closing caps attached to the test tube; maintaining the inner high pressure of the test tube due to the high pressure water; reducing the inner pressure of the test tube through the closing caps, upon the completion of the hydraulic test; and removing the closing caps from the test tube, upon the completion of the hydraulic pressure test.
429342
Fujita Takeshi
Mori Koichi
Onizuka Katsumi
Sasaki Kazuo
Watase Tosio
Kabushiki Kaisha Yamamoto Suiatsu Kogyosho
Riches Mckenzie & Herbert Llp
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