This document specifies the technical requirements, test methods, inspection rules, markings, quality certificates, packaging, storage and transportation requirements for C5 petroleum resins. This document applies to C5 petroleum resin products made from mixed C5 or piperylene as the main raw materials, through pretreatment, polymerization, water washing, distillation and granulation under the action of a catalyst. Other uses of C5 petroleum resin and modified C5 petroleum resin not specified in this document can be implemented with reference to this document.