Wire rope quality appraisal

Steel wire rope, also known as steel rope, is a rope twisted by multiple strands of steel wires or steel wire bundles. It usually consists of three parts: outer layer, steel wire strands and core.
In construction projects, steel wire ropes are often used to hoist and transport large components and equipment, such as crane booms, tower cranes, etc. In addition, it can also be used for cleaning and repairing building exterior walls. Wire ropes are widely used in loading and unloading work in ports and terminals, such as crane spreaders, slings, etc. Some projects have very high tension requirements for steel wire ropes during loading and unloading, requiring them to have high strength and wear resistance.
In cases of wire rope quality appraisal, Zhongke Testing can provide wire rope quality appraisal services.

Steel wire ropes can be classified according to the rope making wire material, surface condition, twisting method and wire rope usage.
is classified according to material: carbon steel wire rope, stainless steel wire rope.
is classified according to surface condition: phosphate-coated steel wire rope, galvanized steel wire rope, plastic-coated steel wire rope, smooth steel wire rope.
is classified according to the twisting method: single-strand rope, double-twist rope, and triple-twist rope.
is classified according to the state: According to the contact state between adjacent layers of steel wires in the strand, it is divided into three types: point contact, line contact or surface contact.

GB/T 20119-2023 Balancing wire rope
GB/T 8358-2023 Steel wire rope Breaking tensile strength determination method
GB/T 5972-2023 Crane wire rope Care, maintenance, inspection and scrap
GB/T 33514-2017 Steel wire core conveyor belt Determination of lateral and vertical displacement of steel wire rope
GB/T 26722-2022 Steel wire rope for ropeway
GB/T 8903-2018 Steel wire rope for elevator
GB/T 20067-2017 Thick diameter steel wire rope
GB/T 14451-2008 Control wire rope
GB/T 9944-2015 Stainless steel wire rope
GB/T 34198-2017 Crane wire rope
0GB/T 33955-2017 Mine lifting wire rope
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quality product dispute situation:
The elevator equipped with the "steel wire rope" involved in the case slipped after being used for a period of time, causing the elevator car to have uneven floors, rush to the top, squat to the bottom, etc. The demander believed that the problem was caused by the unqualified "steel wire rope" involved in the case provided by the supplier. Therefore, the demander filed an application for quality appraisal of the "steel wire rope" involved in the case provided by the supplier.
In order to further clarify the cause of the "slip phenomenon", the buyer hopes to conduct a quality analysis on whether the "steel wire rope" involved meets national standards.
quality analysis results: The
quality analysis expert team conducted an investigation and sampling work on the "steel wire rope" involved in the case, and went to the elevator using the "steel wire rope" involved to investigate the slippage of the wire rope, and tested the national standard-related items related to the slippage of the wire rope. After discussion, the following suggestions and conclusions were made: The commissioned project of the "steel wire rope" involved in the
case basically complies with GB 8903-2005 "Steel Wire Rope for Elevators" and GB/T 8903-2018 "Steel Wire Rope for Elevators". However, there is a possibility that the fiber core lubricant content of some of the "steel wire rope" products involved does not meet the upper limit required by GB 8903-2005 "Steel Wire Rope for Elevators".