AASHTO M 294:2011 Standard Specification for Corrugated Polyethylene Pipe, 300- to 1 500-mm (12- to 60-in.) Diameter

AASHTO M 294:2011 Standard Specification for Corrugated Polyethylene Pipe, 300- to 1 500-mm (12- to 60-in.) Diameter.
1 .1. This specification covers the requirements and methods of tests for corrugated polyethylene (PE) pipe, couplings, and fittings for use in surface and subsurface drainage applications.
1.1.1. Nominal sizes of 300 to 1500mm (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 construction 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.
6 MATERIALS
6.1 Basic Materials:
6.1.1. Extruded Pipe and Blow Molded Fittings—Pipe and fittings shall be made of virgin PE resin compounds meeting the requirements of ASTM D 3350 and cell classification 435400C, except that the carbon black content shall not exceed 5 percent, and the density shall not be less than 0.948 gm/cc nor greater than 0.955 gm/cc. The cell classification shall be based on the virgin PE resin compounds without carbon black. Resins that have higher cell classifications in one or more properties, with the exception of density, arc acceptable provided product requirements are met. For slow crack growth resistance, acceptance of resins shall be determined by using the notched constant ligament-stress (NCLS) test according to the procedure described in Section 9.4. For slow crack growth resistance, acceptance of pipe shall be determined by tests on the finished pipe using the NCLS test according to the procedure described in Section 9.4. The average failure time of the pipe liner shall not be less than 18 hours. If profile geometries do not have a flat portion of sufficient length to produce an NCLS tensile specimen of 25 mm (1 in.) length, usually 15-in. diameter or less, the pipe sample shall be ground and a test plaque made in accordance with ASTM D 4703 Procedure C at a cooling rate of 15°C/mm (27°F/mm) and tested per ASTM F 2136. The average failure time of test specimens from plaques shall not be less than 24 hours.AASHTO M 294 pdf download.