AASHTO M 326-18 PDF Download

AASHTO M 326-18 is a standard specification that specifically addresses the use of polyethylene (PE) liner pipe for pipe relining and culvert rehabilitation in various applications including industrial waste, sanitary sewer, and surface and subsurface drainage. It covers the requirements and methods of tests for PE liner pipe of controlled outside diameter in the nominal sizes ranging from 300 to 1600 mm.

The standard outlines the specific material and workmanship requirements for the PE liner pipe, including dimensions, pipe stiffness, joining systems, and markings. It emphasizes the importance of using PE liner pipe to minimize disruption to traffic and subsurface damage during the rehabilitation process of existing sewers and culverts.

However, the standard does not provide guidelines on how to fill the annular space between the existing pipe and the PE liner pipe, or details on insertion techniques and termination techniques. For this information, reference is made to ASTM F 585, which is the standard practice for the insertion of flexible polyethylene pipe into existing sewers.

It is also noted that if the PE liner pipe is used in locations where the ends may be exposed, precautions should be taken to protect the exposed portions due to the combustibility of polyethylene and the potential effects of prolonged exposure to ultraviolet radiation.