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  • What is the minimum cover for the pipe?
  • What is the minimum cover for the pipe?
    The minimum cover for HDPE pipe is 1'-0" for H-20 traffic loads if installed in accordance with AASHTO Section 30. This is based on empirical calculation of load response, manufacturer's testing and field experience with the pipe....

    • Type：Industry News     Time:2016-04-25

  • Product/Technical FAQs
  • Product/Technical FAQs
    No. Many native soils are well suited for backfill provided they are compacted properly. These soils meeting the unified soil classifications of a GW, GP, SW, SP (ASTM D-2321 Class II) and GM, GC, SM, SC (ASTM D-2321 Class III)...

    • Type：Industry News     Time:2016-04-25

  • Cable Installation
  • Cable Installation
    Most producers can lubricate the conduit during this process to allow easy movement of the cable in the conduit for future removal and replacement. Cable can be tested prior to and following installation to guarantee the integrity of the cable. Check with the conduit producer for specific informati...

    • Type：Industry News     Time:2016-04-25

  • Conduit Network Pulling
  • Conduit Network Pulling
    In the telephone and electrical utility industries, the underground plant is often comprised of a network of3”,4”, and6”conduit banks. These “rigid” conduits are composed of clay tile, cement conduit, or more recently, PVC constructions. They are usually separated by manhole vaults or buried pull...

    • Type：Industry News     Time:2016-04-25

  • Friction in Conduit Systems
  • Friction in Conduit Systems
    Friction is a critical limiting factor in determining the type and length of cable installation. Although very little information on cable installation is provided in this guide, this section has been made available as a background reference on frictional properties....

    • Type：Industry News     Time:2016-04-25

  • Cable Dimension Considerations
  • Cable Dimension Considerations
    Determination of a conduit’s dimensions begins with the largest cable, or group of cables or innerducts, intended for occupancy. From a functional viewpoint, selection of diameter can be broken down into the following general considerations...

    • Type：Industry News     Time:2016-04-25

  • Conduit vs Pipe
  • Conduit vs Pipe
    In general, plastic conduits and plastic pipes are very similar in structure and composition, but deployment is where they differ....

    • Type：Industry News     Time:2016-04-25

  • Conduit Wall Determination
  • Conduit Wall Determination
    Conduit and duct products come in a wide range of sizes, spanning 1/4 -inch (5mm) to 24-inch (610mm) bore casings. The standard dimension ratio, SDR, of a conduit is defined as the ratio of the average conduit diameter divided by the minimum wall thickness....

    • Type：Industry News     Time:2016-04-25

  • Installation Method vs. Short-Term and Long-Term Stress
  • Installation Method vs. Short-Term and Long-Term Stress
    The viscoelastic nature of PE results in differences in the observed mechanical properties as a function of time (and/or temperature). The apparent stress/strain behavior of the material is time dependent under the influence of a sustained load....

    • Type：Industry News     Time:2016-04-25

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