Process and apparatus for testing the tightness of seam joints of synthetic resin sheets by means of vacuum
Apparatus for manipulating corrosion coupons and the like Patent #: 4002059
ApplicationNo. 06/248552 filed on 03/27/1981
US Classes:73/37, WITH FLUID PRESSURE116/268, Differential285/4, Score line or groove73/86EMBRITTLEMENT OR EROSION
ExaminersPrimary: Yasich, Daniel M.
Attorney, Agent or Firm
International ClassesG01M 3/28 (20060101)
G01N 17/00 (20060101)
AbstractA system to monitor the amount of erosion taking place within a pipe in which a point of reduced strength of the pipe is made by drilling a hole or notch to a preselected depth in a selected portion of the pipe wall. A hollow casing is provided around the point of reduced strength to provide a sealed zone. A conduit in the hollow casing is connected to a sensing device to monitor pressure changes when pipe failure occurs at the hole or notch.