Category:730 Corrugated Polyethylene Pipe Culverts
|High Density Polyethylene (HDPE) Pipe Culverts|
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730 Construction Inspection for Sec 730
An inspection of all new installed pipe should be made (See Sec 730.3.5). It should be tested for the criteria set forth in the Inspection heading in the spec. book for the applicable pipe. The inspector should make sure the pipe is from an approved source and is properly marked. The inspector should not accept any pipe that does not have a MoDOT pipe identification number listed on the bill of lading.
Please note, each type, size, class, etc. of pipe on the bill of lading should have a unique MoDOT identification number. The associated SiteManager records should be reviewed to confirm that the details recorded there are representative of the material on the job site. A disposition remark should be made on each sample record indicating arrival of the materials, its condition, and the accuracy of the record. Plastic pipe is sampled at the project. District Construction and Materials should be contacted when the material arrives on site. Although, the specifications require testing of only a minimum of 25% of the pipe, until further notice, 100% of the pipe will be inspected. Care should be made so that sampling does not leave the contractor short of certain sizes and length of pipe. Plastic pipe should have an industry quality control stamp, i.e., PPI. There will not be a MoDOT OK stamp. Tape measures or other devices can be used for a preliminary measurements for diameter deflection. If the results are in question the mandrel test will serve as the definitive test for deflection.
Always make sure that when testing the right measurement unit is used. Pipe can be produced in either English or Metric units. Make sure the measurements are taken in the same units as the pipe was produced. The Qualified List for each type of pipe will indicate the manufacturer's identification mark and the units (English or metric) that was used to fabricate the pipe.
Material Inspection and Laboratory Testing for Sec 730