ISO 5614:1988

Overview

ISO 5614:1988 - Locked coil wire ropes for mine hoisting - Technical delivery requirements - defines the technical delivery requirements, acceptance criteria and testing procedures for locked-coil wire ropes used in mine hoisting. The standard covers rope composition (round and shaped wires), construction, tensile grades, dimensional tolerances, protective coatings and the tests and certificates required for supply and acceptance.

Key topics and requirements

• Components and construction
  • Ropes may use combinations of round and shaped wires; outer layer is shaped wire, inner layers may be round or shaped.
  • Lubricants and impregnating compounds conform to ISO 3156 requirements.
• Dimensions and tolerances
  • Nominal vs actual rope diameter: actual diameter measurement tolerance is ±2% (subject to a maximum deviation rule for large ropes); measurement method specified.
  • Length and mass: nominal/actual length tolerances and nominal rope mass per metre are agreed at order.
• Mechanical properties
  • Breaking loads: two acceptance methods (Method A - single-piece measured breaking load; Method B - aggregate breaking load) are defined. Measured breaking load must not be more than 5% below nominal.
  • Wire tensile grades: nominal tensile strength grades for round and shaped wires are specified and must be agreed between supplier and purchaser.
• Wire manufacture and quality
  • Diameter tolerances for bright and galvanized wires; limits on tensile strength variation; minimum numbers of reverse bends and torsions for wire samples.
  • Zinc coating: minimum surface density for galvanizing - typically 65 g/m² for certain wires and 45 g/m² for shaped wires (as specified).
• Testing and inspection
  • Tests on completed rope (diameter, length, mass, breaking-load test to destruction), and on wires removed from ropes.
  • Test-piece rules: clear test length ≥ 30× rope diameter or not less than 1.5 m; testing machine accuracy ±1%.
  • Sampling and galvanized-coating testing on a percentage of wires.
• Certification and packing
  • Works certificates, full works certificates and acceptance certificates are required; annexes provide example certificate formats.

Applications

• Ensures safe, reliable supply of locked-coil wire ropes for mine hoisting, used in hoists, skips, cages and other underground lifting systems.
• Guides procurement specifications, manufacturer quality control, factory and acceptance testing, and regulatory compliance for mining operations.

Who uses this standard

• Rope manufacturers and suppliers
• Mining operators and maintenance engineers
• Design and procurement teams specifying hoisting systems
• Testing laboratories and inspection authorities

Related standards

• ISO 2232 (drawn wire), ISO 2532 (wire rope vocabulary), ISO 3156 (lubricants), ISO 6892 (tensile testing), ISO 7800 / 7801 (wire torsion/reverse-bend tests).

For procurement or technical specification drafting, reference ISO 5614:1988 where locked-coil rope dimensional, mechanical and testing requirements must be explicit and mutually agreed between purchaser and supplier.