Short answer
Single and double wire braid distinguish the construction of the reinforcement layers; on their own they do not indicate a specific working pressure. Comparisons should be made at the same size, and the products' actual catalog limits should be read. More layers do not mean a more suitable product in every application.
Source: S017
Technical explanation
In addition to the number of braids, pressure resistance depends on the wire, braid geometry, inner tube and product design. Compact and conventional series may show different dimensional and flexibility properties. A hose's working pressure can also vary across diameters. Therefore, a table independent of product and size in the form 'single wire is this pressure, double wire is that pressure' is not a reliable selection tool. In addition, the assembly match between hose and fitting cannot be derived from the number of layers.
Source: S017
Topic-specific checkpoints
| Item | Description |
|---|---|
| Number of braids | Structural identification; not a pressure value on its own. |
| Same size | The starting point of comparison; different diameters are not mixed. |
| Compactness | Outside diameter and bend data are compared separately. |
| Assembly | An approved combination and crimp table are sought for each candidate. |
Source: S017
How is it assessed in practice?
In an example comparison, list the two candidates at the same nominal diameter, the same fluid and the same temperature. If both meet the required pressure, continue the assessment based on bending space, external protection, weight, supply and a verified assembly system. Instead of summarizing the comparison as 'two wires are always better', write which requirement is met by which product. If the pressure threshold is not met, other advantages do not close the technical gap. Do not make an equivalence decision from the number of braids without the pressure, bend and assembly data for the product code and size.
Original editorial recommendation; not a clause of a standard.
Frequently asked questions
Can I fit a double wire hose directly in place of a single wire one?
Do not accept it directly. Size, bending, fluid and connection system may change. A change should not be made based only on the seemingly higher pressure before the equivalence assessment is completed.
Source: S017
Source coverage
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S017
Parker Safety Guide, Publication 4400-B.1 Parker Hannifin · accessed 2026-10-20 PDF page 2; 2.2 PressurePDF page 2; 2.7 SizePDF page 3; 3.1 Component Inspection, 3.2 Hose and Fitting Assembly and 3.3 Related Accessories