This specification covers the requirements and methods of tests for steel-reinforced polyethylene (PE) ribbed pipe, couplings, and fittings for use in surface and subsurface drainage applications.

Note—This specification is an extension of AASHTO M 335, but covering larger pipe diameters.

Nominal sizes of 1650 to 3000 mm (66 to 120 in.) are included.

Materials, workmanship, dimensions, perforation, pipe stiffness, impact resistance, tensile strength of seams, shape stability, joining systems, and form of markings are specified.

Steel-reinforced PE ribbed 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—When steel reinforced PE ribbed 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 effects of prolonged exposure to ultraviolet radiation as well as corrosion of the steel reinforcement.

This specification only deals with this pipe’s materials requirements. The structural design of steel reinforced thermoplastic culverts and the proper installation procedures are given in the AASHTO LRFD Bridge Design Specifications, Section 12, and AASHTO LRFD Bridge Construction Specifications, Section 26, respectively. Upon request of the user or engineer, the manufacturer shall provide profile wall section detail required for a full engineering evaluation.