What are the marking methods for different types of wire ropes?
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The term "detailed" fits best when referring to steel wire ropes. Steel wire ropes come in various types, each with complex specifications. Every number and letter in their markings carries unique significance. In the following sections, we’ll explain how different types of wire ropes are labeled.
1. Full Marking Method for Single-Lay and Enclosed Steel Wire Ropes
When marking these ropes, start from the outer layer and move toward the core, listing the number of wires in each layer, including the central wire, separated by a "+" sign. For instance, a single-lay wire rope would be marked as 12+6+1.
For wire ropes with non-circular cross-sections, add the corresponding symbols to the wire count. For example, an enclosed wire rope would be marked as 23Z+9H+12+6+1.
2. Full Name Marking Method for Double-Lay Wire Ropes
Mark the rope from the outer layer to the core, layer by layer. The total number of strands is noted first, followed by the structure of each strand in parentheses. The structure of each strand is marked from the outermost layer inward, showing the number of wires in each layer, including the central wire or fiber core, separated by a "+" sign. Layers within layers are also separated by a "+" sign. For natural fiber core ropes, the strand is separated from the fiber core by a "+" sign as well. A multi-strand rope with a natural fiber core might be marked as 12(6+1)+6(6+1)+NF.
For metal strand core wire ropes, separate the structure of the strand from the IWS marker with a "+". For example, a metal strand core wire rope could be marked as 6(6+1)+IWS(6+1).
For metal rope core wire ropes, separate the rope core's wire rope structure from the IWR marker with a "+", and indicate the strand structure of the rope core in brackets. An example of a metal rope core with a Silu rope would be 6(10+10+1)+IWR[6(6+1)+IWS(6+1)].
For filler wire ropes, denote the filler wire with the letter "F" and separate it from the corresponding layer using a "+". A metal rope core filler rope could be marked as 6(12+6F+6+1)+IWRC6(6+1)+IWS(6+1).
For Walinzon wire ropes, wires of varying diameters in the same layer are separated by "/". A natural fiber core Walinzon wire rope might be marked as 6 (6/6+6+1)+NF.
For special-shaped ropes, add the appropriate symbol to the stock count. For instance, a natural fiber core triangular rope would be marked as 6V (9+12+1V)+NF.
3. Marking Method for Triple-Lay Wire Ropes
Mark the rope from the outside to the center, indicating the total number of sub-ropes, and then note the structure of the sub-ropes in parentheses. The full name of a triple-lay steel wire rope would be marked as 6[6(6+1)+NF]+NF, while its abbreviated form would be 6×6×7+7NF.
4. Marking Method for Braided Wire Ropes
The marking method is similar to that of double-lay wire ropes, except that the total number of strands is indicated first, followed by the "Y" symbol. For example, the full name of a braided wire rope would be Y8 (12+6F+6+1).
5. Marking Method for Flat Steel Wire Ropes
The marking method is the same as for triple-lay wire ropes, but the symbol "P" is added before the total number of sub-ropes. The full name of a flat steel wire rope would be P8[4(6+1)+NF], with its abbreviation being P8×(4+7+NF).
6. Abbreviation Marking Method for Wire Ropes
The simplified marking of a wire rope separates the total number of strands in its full name from the total number of wires per strand with the "×" sign, and then uses the "+" sign to separate the core code. For example, the abbreviation would be 6×7+NF.
For wire contact wire ropes like Xilu wire ropes, the abbreviation codes are S, W, and Fi. For hybrid and composite structural wire ropes made from these, the abbreviation code of their structure is marked after the total number of wires per strand. For example, the abbreviation of a metal rope core Varintoshilu rope would be 6×41WS+IWR. Another example is the abbreviation of a braided wire rope: Y8×19Fi.
7. Marking Method for Surface Contact Wire Ropes
Surface contact wire ropes are marked using the same method as their corresponding double-lay wire rope structures, but with the code T followed by the total number of strands. A fiber core surface contact wire rope 6T (6+1)+NF would have the abbreviation 6T×7.
This detailed explanation should help you understand how various types of steel wire ropes are labeled, ensuring proper identification and selection based on specific needs.
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