This standard specifies the method of spark test for plastic lining steel Pressure Vessel, including the principle of the test, equipment requirements, sample preparation, test steps, result judgment and preparation of test report. It is suitable for Pressure Vessel with steel shell and hard polyvinyl chloride (PVC-U), polyethylene (PE) (PE) and other plastic materials. Whether there are micropores or crazing defects in the lining is detected by spark. This standard provides an important basis for ensuring the mass and safety of the lining of Pressure Vessel, ensuring its Reliability during use.