AASHTO M 326:2018 Standard Specification for Polyethylene (PE) Liner Pipe, 300- to 1 600-mm Diameter, Based on Controlled Outside Diameter

AASHTO M 326:2018 Standard Specification for Polyethylene (PE) Liner Pipe, 300- to 1 600-mm Diameter, Based on Controlled Outside Diameter.
4.2. Standard Dimension Ratios covered by this specification are SDR 41, SDR 32.5, and SDR 26.
4.3. Where existing conditions or special requirements make other SDR classifications necessary, other sizes or dimension ratios or both shall be acceptable for engineering applications when mutually agreed on by the customer and the manufacturer. This is provided that the pipe is manufactured from plastic compounds meeting the material requirement of this specification.
5. ORDERING INFORMATION
5.1. Orders using this specification shall include the following information as necessary to adequawlv describe the desired product:
5.2. AASI ITO designation and year of issue;
5.2.1. Type of pipe (Section 4.2);
5.2.2. Diameter and length required, either total length or length of each piece and number of pieces;
5.2.3. Certification, if desired (Section 12.1).
6. MATERIALS
6.1. Basic Materials:
6.1.1. Extruded Pipe and Fittings—Pipe and fittings shall be made of virgin PE conforming with the requirements of cell class 345464C as defined and described in ASTM D3350. Resins that have higher cell classifications in one or more properties are acceptable provided that product requirements arc met.
6.1.2. Rotational Molded Fittings and couplings—Fittings and couplings shall be made of virgin PE resins that conform with the requirements of cell classification 213320C as defined and described in ASTM D3350, except that the carbon black content shall not exceed 3 percent. Resins that have higher cell classifications in one or more properties are acceptable provided that product requirements arc met.
6.2. Reworked Plastic—In lieu of virgin PE, clean reworked plastic may be used by the manufacturer, provided that it meets the cell class requirements as described in Section 6. 1.
6.3. The manufacturer shall not blend resins to meet the cell classification specified in Section 6.1.1 or
6.1.2. Blending of reworked plastic and virgin plastic is allowed provided that both the reworked resin and the virgin resin meet the requirements of Section 6.1.
7. REQUIREMENTS
7.1. Workmanship- The pipe and fittings shall be free of foreign inclusions and visible defects as defined herein. The ends of the pipe shall be cut squarely and cleanly so as not to adversely affect joining or connecting. Field cuts shall be dc-burred and free of defects.
7.2. Visible Defi?cts—Cracks, creases, delarninations, and unpigmented or nonuniformly pigmented pipe arc not permissible in the pipe or fittings as furnished. There shall be no evidence of cracking or delamination when tested in accordance with Section 9.2.AASHTO M 326 pdf download.