load for 10min, and the test was conducted by magnifying glass or other methods. No cracks, cracks or residual deformation should be found.5. Three dangerous sections should be cleaned with kerosene and examined for cracks with a magnifying glass.Check the wear of bushing and pin on the plate hook.6.The defects on the hook shall not be repaired by welding.ApplicationFactoriesminespetroleum,chemicalsship terminalscrane ProfileWe supply hooks ranges from 1.6# to250#,the size is as below tables.I