This standard is part of the "Plastics—Recycled Plastics" series, providing unified technical specifications for powdered unplasticized (rigid) and granular plasticized (soft) recycled plastics made from waste polyvinyl chloride (PVC) plastics. It clearly defines the classification, naming, technical requirements, test methods, packaging, storage, and other full-process requirements for these two types of recycled PVC, aiming to standardize and enhance the quality and application level of recycled PVC materials. The test methods covered in the standard typically require the use of a melt flow indexer to determine the melt flow rate, a universal material testing machine to test mechanical properties such as tensile strength, and may also involve instruments such as a thermogravimetric analyzer for material thermal stability analysis.