Apparatus for permeability analysis

An apparatus for permeability analysis transmitting a testing fluid into a tubular specimen and measuring said testing fluid permeating through said tubular specimen, comprising;

• a carrier gas supply unit,
• a cylindrical frame that is shorter than said tubular specimen and accommodates part in a certain length of said tubular specimen therein,
• two sealing joints that are located on each end of said cylindrical frame and are used to seal up the inner surface of said cylindrical frame and the outer surface of said tubular specimen,
• a carrier gas flow inlet leading from the outside of said cylindrical frame to the inside of said cylindrical frame,
• a carrier gas flow outlet leading from the inside of said cylindrical frame to the outside of said cylindrical frame,
• a detection device, and
• a pump,
• wherein one end of said tubular specimen and another end of said tubular specimen are connected to each other via said pump, and
• wherein said apparatus for permeability analysis circulates said testing fluid through said tubular specimen continuously or intermittently by means of said pump, introduces carrier gas supplied by said carrier gas supply unit to said carrier gas flow inlet, conveys said carrier gas flowing out of said carrier gas flow outlet to said detection device, and then measures the volume of said testing fluid contained in said carrier gas by means of said detection device.