AASHTO M 294:2016 Standard Specification for Corrugated Polyethylene Pipe, 300- to 1500-mm (12- to 60-in.) Diameter

AASHTO M 294:2016 Standard Specification for Corrugated Polyethylene Pipe, 300- to 1500-mm (12- to 60-in.) Diameter.
1.1. This specification covers the requirements and methods of tests for corrugated polyethylene (PE) pipe, couplings, and littings for use in surface and subsurface drainage applications.
1.1.1. Nominal sizes of 300 to 1500 mm (12 to 60 in.) are included.
1.1.2. Materials, workmanship, dimensions, pipe stiffness, slow crack growth resistance, joining systems, brittleness, and form of markings are specified.
1 .2. Corrugated PE pipe is intended for surface and subsurface drainage applications where soil provides support to its flexible walls. Its major use is to collect or convey drainage water by open gravity flow, as culverts. storm drains, etc.
Note 1- —When PE pipe is to be used in locations where the ends may be exposed. consideration should be given to protection of the exposed portions due to combustibility of the PE and the deteriorating effects of prolonged exposure to ultraviolet radiation.
1 .3. Units—The values stated in SI units are to be regarded as standard. Within the text, the U.S. Customary units are shown in parentheses, and may not be exact equivalents.
1 .4. This specification does not include requirements for bedding. backfill, or earth cover load. Successful performance of this product depends upon proper type of bedding and backfill, and care in installation. The structural design of corrugated PE pipe and the proper installation procedures are given in AASHTO LRFD Bridge Design Specifications, Section 12, and LFRD Bridge coiistruc,ion Specifications, Section 30, respectively. Upon request of the user or engineer, the manufacturer shall provide profile wall section detail required for a full engineering evaluation.
3 TERMINOLOGY
3.1 The terminology used in this standard is in accordance with the definitions given in ASTM D83 and ASTM F412 unless otherwise specified.
3.2. buckling—During pipe stiffness testing, any decrease or downward deviation in the pipe stiffness test curve at or below the calculated buckling deflection limit shall be considered a buckling point. Additionally, any irrecoverable longitudinal crease or similar irrecoverable artifact that spans three or more corrugations and is present after 30 minutes following removal of the test specimen from the parallel plate test machine shall be considered as buckling.
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