Method and apparatus for connecting a tap to a pipeline

摘要: According to the invention a fitting having an outlet passageway is initially located on pipeline be tapped. The includes cylindrical cutting blade and expandable sealing wafer internally of radially tubular insert. blade, insert are threadably advanced fitting, causing remove coupon portion from provide aperture through sidewall. partially inserted into pipeline, with being expanded expand engagement within When portion, cutter removed interior will communicate which operatively couples pipeline. Additionally, interference fit sidewall encircles assures positive pressuretight seal encircling