1.1 This specification covers requirements and test methods for annular, corrugated profile wall polyethylene pipe and fittings with an interior liner. The nominal inside diameters covered are 12 to 60 in. [300 to 1500 mm]. 1.2 The requirements of this specification are intended to provide pipe and fittings for underground use for gravity-flow storm sewer and subsurface drainage systems. Note 1: Pipe and fittings produced in accordance with this specification shall be installed in compliance with Practice D2321. 1.3 This specification covers pipe and fittings with an interior liner using a corrugated exterior profile (Fig. 1). FIG. 1 Typical Annular Corrugated Pipe Profile 1.4 The products manufactured under this standard use either virgin or recycled (post-industrial or post-consumer) materials in accordance with the requirements specified for each. 1.5 Units-The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.6 The following precautionary caveat pertains only to the test method portion, Section 7, of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.