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  • Design and performance of underground pipe
    Pipe design has generally focused on the change in diameter across the pipe section, although levels of circumferential hoop and bend- ing stress, circumferential strain, and the possibility of circumfer- ential buckling have also been considered. .... These computational tools have the potential to ensure that the structural design of buried HDPE pipe is based on rigorous engineering principles, and that it is both safe and efficient.
  • Inspection of Fusion Joints in Plastic Pipe
    Operators use a standard bend test to test the integrity of pipe welds in the field. .... The WZIM inspection tool should be validated with the standard bend test for the sole purpose of .... HDPE and MDPE Defects and Defect Characteristics .
  • Horizontal Directional Drilling: Utility and Pipeline Applications > HDD Design
    The suppliers of the mud motor and steering tools can provide information and recommendations concerning the allowable bend radius of their products. .... Pipe Stress Criteria. .... Typical products installed by HDD construction are composed of steel, polyethylene ( HDPE and PE), polyvinyl chloride (PVC…
  • RESPONSE OF PROFILED HIGH-DENSITY POLYETHYLENE PIPE IN HOOP COMPRESSION
    Pipe design has generally focused on the change in diameter across the pipe section, although levels of circumferential hoop and bend- ing stress, circumferential strain, and the possibility of circumfer- ential buckling have also been considered. .... These computational tools have the potential to ensure that the structural design of buried HDPE pipe is based on rigorous engineering principles, and that it is both safe and efficient.
  • Design and Performance of Plastic Drainage Pipes in Environmental Containment Facilities
    For example, a plastic drainage pipe in a landfill that has deflected too much such that the passage of pipe inspection and cleaning tools is obstructed would be expected to clog rap- idly and hence quickly cease to perform its intended design … because they are most probably in a state of coupled long-term creep and relaxing bending stress. .... For HDPE landfill leachate collection pipes the question of how long the pipe retains its original properties…
  • Design and Performance of Plastic Drainage Pipes in Environmental Containment Facilities
    For example, a plastic drainage pipe in a landfill that has deflected too much such that the passage of pipe inspection and cleaning tools is obstructed would be expected to clog rapidly and hence quickly cease to per- form its intended design … they are most probably in a state of coupled long-term creep and relax- ing bending stress. .... For HDPE landfill leachate collection pipes the question .
  • Federal Register > Monday, April 23, 2012 > [77 FR 24196] Alaska Village Electric Cooperative; Notice of Preliminary Permit Application Accepted for Filing and...
    A total of 7,250 feet of HDPE would be installed from the intake and 2,850 feet of steel pipe would be installed near the powerhouse. .... The pipeline would be located such that bends would be gradual while minimizing the amount of excavation .... The building would house the turbines and associated equipment, switchgear, controls, and tools and would be placed…