Sampling system for obtaining pipeline gas samples

G - Physics – 01 – N

Patent

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G01N 1/22 (2006.01) G01N 1/24 (2006.01)

Patent

CA 2357381

A sample probe 18 for a gas sampling system obtains a highly accurate hydrocarbon gas sample from a pipeline, particularly when ambient conditions are below the hydrocarbon dew point. A compartment 20 houses a heater 44 and a pump 30, with the pump being mounted on an upper body 50 of probe 18 by suitable nuts 56, 58. A lower probe section 48 having coarse threads 76 is mounted within pipeline 10 and has a diameter Dl of at least greater than 80% of the diameter D of internally threaded opening 14 of pipeline 10. Probe 18 has large diameter upper body 50 externally threaded for mounting compartment 20 thereon. Probe 18 is preferably formed of an anodized aluminum material having a high thermal conductivity in excess of 80 BTU/Ft Hr/Ft2/°F.

Une sonde d'échantillon 18 pour un système d'échantillonnage de gaz permet de relever un échantillon de gaz d'hydrocarbures très précis à partir d'une pipeline, en particulier lorsque des conditions ambiantes sont en dessous du point de rosée d'un hydrocarbure. Un compartiment 20 abrite un dispositif de chauffage 44 et une pompe 30, la pompe étant montée sur un corps supérieur 50 de sonde 18 par des écrous adaptés 56, 58. Une section de sonde inférieure 48 ayant des filets grossiers 76 est montée à l'intérieur de la pipeline 10 et a un diamètre Dl supérieur d'au moins 80 % au diamètre D de l'ouverture à filetage intérieur 14 de la pipeline 10. La sonde 18 possède un corps supérieure 50 de diamètre supérieur et à filetage extérieur pour fixer le compartiment 20 sur celui-ci. La sonde 18 est de préférence formée d'un matériau en aluminium anodisé ayant une conductivité thermique élevée de l'ordre de 80 BTU/ft/Hr/Ft2/°F.

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