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Machine translation
1. (WO1981002631) LEAKAGE DETECTION METHOD USING HELIUM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002631    International Application No.:    PCT/JP1981/000048
Publication Date: 17.09.1981 International Filing Date: 06.03.1981
IPC:
G01M 3/20 (2006.01), G01M 3/22 (2006.01)
Applicants:
Inventors:
Priority Data:
80/29946 10.03.1980 JP
Title (EN) LEAKAGE DETECTION METHOD USING HELIUM
(FR) PROCEDE DE DETECTION DE FUITE UTILISANT DE L"HELIUM
Abstract: front page image
(EN)A method for detecting leakage in a vacuum or high-pressure apparatus, piping, or the like using a helium detector (5), which comprises increasing the relative partial pressure of helium reaching a helium detector (5) by means of membrane (6), allowing helium gas to selectively permeate therethrough, and detecting the resulting helium. A sample of gas from a system which is to be detected for leakage, or a sniffer probe, is introduced into test port (1), helium in the gas permeates through the helium-permeating membrane (6) and is detected by helium detector (5) in the course of being discharged via pump (3). The helium-permeating membrane (6) maintains partial pressure of air in the helium detector at a level of 10-4 Torr or less, and also functions as a filter.
(FR)Un procede de detection de fuite dans un appareil, tuyau, ou autre a vide ou a haute pression utilisant un detecteur a helium (5), consiste a augmenter la pression partielle relative de l"helium atteignant un detecteur a helium (5) a l"aide d"une membrane (6), a permettre au gaz d"helium de passer selectivement au travers de celle-ci, et a detecter l"helium resultant. Un echantillon de gaz provenant d"un systeme que l"on doit controler pour en detecter des fuites eventuelles, ou une sonde a renifler, est introduite dans un orifice de test (1), l"helium dans le gaz passe au travers de la membrane d"infiltration de l"helium (6) et est detecte par le detecteur (5) pendant sa decharge a l"aide d"une pompe (3). La membrane (6) d"infiltration de l"helium maintient une pression partielle d"air dans le detecteur a helium a un niveau de 10-4 Torr ou moins, et joue egalement le role de filtre.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)