CECS 122-2001 in English

Scope

This procedure applies to the design, construction and acceptance of newly built, expanded and renovated buried drainage pipeline projects without internal pressure. This regulation applies to rigid polyvinyl chloride pipes laid underground, including double-wall corrugated pipes, annular ribbed pipes, spiral ribbed pipes and other special-shaped wall pipes and flat-walled pipes. The nominal diameter range of the pipes is DN110~DN630. Note: The pipe structure type is shown in Appendix A. In addition to complying with the provisions of this regulation, the pipe structure type should also comply with the relevant parameters for special-shaped wall pipes provided by the manufacturer. This procedure is suitable for burial under general geological conditions or in acidic, alkaline and other corrosive soils. In areas with collapsible loess, expansive soil, and permafrost, it should still comply with the relevant national standards.