Overview
ISO 10547:2009 defines requirements and designation rules for polyester fibre ropes with double braid construction (coaxial ropes). It covers both standard double-braided polyester ropes and high‑strength (hr) variants, specifying construction, physical properties, marking and manufacturing/labeling requirements to ensure consistent performance and clear identification across industries.
Key topics and technical requirements
- Scope and designation
- Applies to double braid (coaxial) ropes made of polyester; provides rules for naming and marking (examples: Cordage en fibres ISO 10547 - 20 - PES or … - PES (hr)).
- Construction
- Double-braid (coaxial) design: a separately produced hollow inner braid (core/âme) with an outer braid (cover) applied in a second operation.
- Mass of inner OR outer braid must not exceed 55% of total rope mass; construction must comply with ISO 9554.
- Braid element counts
- Minimum number of strands in outer braid: 16 for reference numbers 6–16; 24 for reference numbers >16.
- Splicing and strand changes
- Strand changes permitted with defined overlap and spacing rules: overlap equal to 8 × reference number, but not less than 600 mm for reference ≤72; spacing between changes ≥ 12 m. Limited strand changes allowed for typical lengths ≤200 m; additional changes allowed for longer lengths as needed.
- Core strand changes must be documented and made available for inspection.
- Physical properties and testing
- Linear mass (ktex) and minimum breaking forces (kN) are specified in tabulated form for reference numbers (6–240); linear mass measured under reference tension per ISO 2307.
- Breaking forces refer to new ropes (dry and wet) and are measured according to ISO 2307; notes warn that terminations, knots, winding and service history affect real-world strength.
- Marking
- Marking, packaging and supply lengths per ISO 9554.
- High‑strength identification: blue yarn in centre for reference