| 摘要 |
<p>A high pressure pipe tester plug for insertion into a pipe having a joint such as a weld to be tested includes a stem terminating in a fixed tapered washer, a plurality of grip segments arranged about the stem, an annular floating mandrel positioned about the stem and having an upper retaining section, a cylindrical section and a tapered entry section, an O-ring positioned in an internal recess of the floating mandrel and a ring-shaped seal, rectangular in cross section, positioned about the cylindrical section of the floating mandrel and retained by the upper retaining section. When tightened by a nut, the floating mandrel is forced into the top end of the grip segments, the washer is forced into the bottom end of the grip segments and the ring-shaped seal engages the pipe interior to isolate the joint to be tested.</p> |
