This invention offers a method to install a wear-resistant polymeric sleeve in a pipe bend stiffener with a metal inner wall, including the following steps: calculate thickness of the internal wall of the stiffener that can removed; remove the thickness of at least a portion of the calculated inner wall; and apply a polymeric material sleeve in the inner wall of the stiffener, where the polymeric material sleeve has the thickness of the inner wall removed.

A testing apparatus for onsite creation of cured sample liners necessary for confirming proper rehabilitation of pipelines includes a testing box having a base with a plurality of upstanding side walls defining an open upper end of the testing box. The testing box also includes an electrical power control assembly and an ultraviolet light assembly. A liner support manifold is shaped and dimensioned for supporting a sample liner and for attachment to the open upper end of the testing box for exposing the sample liner to pressure and ultraviolet light. In practice, and with the sample liner secured to the liner support manifold and the liner support manifold secured to the testing box, the sample liner is exposed to pressure and UV light in a highly controlled manner allowing for replication of actual in-line curing processing.

[Problem] To provide a cover bonding product fabrication method with which it is possible to perform complex sewing such as zigzag stitching, double stitching, and embroidery with a pattern sewing machine via automated operation, regardless of the size of a curved surface of the cover bonding product. [Solution] According to the present invention, a method for determining a sewing pattern on a base material includes: (1) an analysis step for measuring and analyzing an expansion rate of a cover when the cover is vacuum-formed on the base material; (2) a specifying step for specifying, on the basis of the measured expansion rate, a range where the expansion rate is 130% or lower; and (3) a sewing pattern determination step for determining a sewing pattern in the range where the expansion rate is 130% or lower.

A system and method for efficiently inserting pull-in-place lining systems into an existing pipeline are provided. The system and method compensate for the effect of tension in an insert as the insert is being pulled through the pipeline. Specifically, the degree of sag of a portion of the insert in a sag zone is determined from data provided by one or more proximity sensors positioned adjacent the insert as the insert is advanced downstream along a feed path. The speed of the advancing of the insert is adjusted based on the determined degree of sag and a predetermined optimal sag range.