This standard specifies the technical requirements for drop hammer tear test of pipeline steel pipes, including test equipment, specimens, heating and chill down, evaluation of fracture shear area, etc. It is applicable to drop hammer tear test and result evaluation of pipeline steel pipes and steel plates and coils used for pipe making. In the test, the testing machine needs to have enough energy to completely break the specimen with one impact, and should maintain a stable structure and appropriate Impact velocity and hammer edge curvature radius. The placement and alignment of the specimen are also clearly specified to ensure the accuracy and Reliability of the test.