1.1 This specification covers requirements and test methods for materials, dimensions, workmanship, flattening resistance, impact resistance, pipe stiffness, extrusion quality, and a form of marking for folded (vinyl chloride) (PVC) pipe for existing s This specification covers the material, dimensional, and requirements and corresponding test methods for folded poly(vinyl chloride) (PVC) pipes suitable for the rehabilitation of existing nonpressure sewers and conduits, wherein the folded PVC pipe is