In the side of the table should be black and yellow safety signs
In the side of the table should be black and yellow safety signs , lift platform must be installed in table and floor entrances and exits from the obvious position " without permission , shall not enter ," the warning signs .
5.3 inspection of metal structures
5.3.1 Important weld
Important visual inspection of weld tables, lifting devices , bearing steel , etc., should be smooth, plump , oxide liftstar shop cranes should be divisible , without visible weld , cracks, slag , undercut crater , burn and not welded through other defects, weld geometry and dimensions shall comply with design patterns .
5.3.2 Butt welds NDT
Bearing steel butt welds shall comply with the design requirements , butt weld length should be 20% of non-destructive testing.
Ray examination in accordance with GB/T3323-2005 " metal fusion welded joints radiography " provides power pallet jack radiographic quality level of not less than AB , qualified at Level Ⅱ; ultrasonic testing in accordance with GB/T11345-1989 " steel welds manual ultrasonic testing method and classification of testing results "provides test grade of not less than B grade, qualified at Level Ⅰ.
5.3.3 There should be no structural members overall instability , severe plastic deformation and cracks and other phenomena
5.3.4 fasteners should be complete and securely locked