The standard specifies the inspection method for the composition of fresh mortar in the centrifugal lining of ductile cast iron pipes. Including the ratio of mortar, physical properties and test methods, etc., to ensure the mass and performance of the lining. Proposed by the National Machinery Industry Bureau, the National Metal and Non-metallic Coating Standardization Technical Committee is centralized, and Wuhan Institute of Material Protection and Xuzhou Guangda Xinxing Foundry Pipe Co., Ltd. are responsible for drafting, which ensures the accuracy and reliability of the detection method.