The steel wire rope of tower crane is an important part for carrying and transferring loads, and its service life and safety are critical to the operation of tower crane. The following are some common bases for scrapping standards of tower crane wire ropes:

1. National standards: China's standards for steel wire ropes for tower cranes and slings are GB 10055-2015 Technical Conditions for Tower crane and GB/T 8918-2014 Steel Wire Rope Inspection Procedures. These standards provide specific requirements for the design, manufacture, installation, use and inspection of tower crane wire ropes.

2. Service life: The service life of tower crane wire rope is usually specified according to national standards. In general, the service life of steel wire ropes is between 3 and 5 years, depending on factors such as usage conditions, working environment, and maintenance.

3. Stress loss: During use, steel wire ropes may experience stress loss due to factors such as load and friction. When the stress loss of the steel wire rope reaches a certain level and exceeds the limit value specified in the national standard, even if there is no obvious damage on the surface, it should be considered for scrapping.

4. Wire breakage and wear: The wire breakage and wear on the surface of the steel wire rope is one of the important indicators for determining scrap. Broken wire refers to the phenomenon of the steel wire of a steel wire rope breaking or falling off during use, and wear refers to the grooves and wear formed on the surface of the steel wire rope due to friction and wear. If wire breakage and wear seriously affect the structure and strength of the steel wire rope, it should be scrapped in a timely manner.

5. Corrosion and rusting: Steel wire ropes are susceptible to corrosion and rusting, especially in humid and corrosive environments. If severe corrosion and rusting occur on the steel wire rope, resulting in a decrease in its strength and reliability, it should be scrapped in a timely manner.

6. Local deformation during bending: Steel wire ropes may experience local deformation due to bending and twisting during use. If these deformations exceed the limit values specified in national standards, it will affect the strength and safety of the steel wire rope, and scrapping should be considered.

7. Records and trajectories: Each wire rope should have relevant records, including information such as purchase source, installation date, usage, maintenance records, and inspection reports. These records help track the service life and condition of steel wire ropes, ensuring their timely scrapping.

It should be noted that the above standards and basis should be comprehensively considered when determining scrap. If you have any questions, it is recommended to consult professional technical support or tower crane manufacturers. Scrapped steel wire ropes should be immediately stopped from use and treated safely to prevent accidental injury or equipment damage caused by scrapped steel wire ropes.