1.1 This specification covers nonreinforced concrete pipe intended to be used for the conveyance of sewage, industrial wastes, storm water, and for the construction of culverts.1.2 This specification is the metric counterpart of Specification C This specification covers nonreinforced concrete sewer, storm drain, and culvert pipe. The pipe manufactured according to this specification shall be of three classes: Class 1, Class 2, and Class 3. The strength requirements for nonreinforced concrete