ISO 4346:1977

Overview

ISO 4346:1977 specifies the basic requirements for lubricants used in the manufacture of steel wire ropes for general purposes. Developed by ISO Technical Committee ISO/TC 105, this international standard addresses the nature and properties of lubricants essential to protect and enhance the performance of steel wire ropes during their production. Key exclusions include service dressings and fibre core lubricants, focusing solely on the lubricants applied during manufacture.

This standard plays a critical role in ensuring the consistency, quality, and performance of lubricants within the wire rope industry. It establishes general and special requirements, qualification tests, and quality control procedures for lubricants to maintain the durability and safety of steel wire ropes used across various industries.

Key Topics

• Scope and Application
  ISO 4346:1977 applies to lubricants designed to protect steel wires from corrosion, minimize friction and fretting between wires, and ensure optimal rope functionality in a broad range of general-purpose applications.

• General Requirements for Lubricants

  • Must consist of a non-volatile base material with excellent corrosion protection and friction reduction properties.
  • Lubricants must have good covering properties, be water-repellent and water-resistant, and contain no emulsifiable compounds in water.
  • Prohibition of grit, abrasives, deliberate weighting, water, chlorides, or similar impurities.
  • Additives must not cause corrosion or damage to steel, zinc, or fibre components through moisture exposure or degradation by heat and sunlight.

• Special Requirements

  • Non-volatile base materials may be dissolved in solvents that exclude benzene and chlorinated hydrocarbons.
  • Lubricants requiring heating for viscosity reduction must return to their original state after heating without degradation – a property termed heat reversibility.
  • Emphasis on avoiding damage caused by overheating or prolonged heating during application.

• Qualification Tests

  • Lubricants must pass specified tests agreed between the lubricant supplier and the wire rope manufacturer to receive a qualification certificate.
  • Any formula changes necessitate requalification to maintain compliance.

• Quality Control

  • Supplied lubricants must conform strictly to the approved formula within manufacturing tolerances.
  • Agreed testing methods and characteristics ensure batch-to-batch consistency.
  • Suppliers provide certificates of conformity for each qualified product.

Applications

ISO 4346:1977 lubricants are primarily applied during the manufacture of steel wire ropes used in mining, construction, marine, transportation, and industrial lifting. The standard ensures that the lubricants:

• Enhance corrosion resistance of metal wires in varying environmental conditions.
• Reduce friction and fretting, which decreases wear and extends the lifespan of wire ropes.
• Maintain fibre core integrity by avoiding harmful chemical interactions.
• Facilitate smooth rope operation in dynamic applications such as cranes, elevators, and rigging.

By meeting ISO 4346 requirements, lubricant manufacturers and wire rope producers can ensure their products meet international quality standards, contribute to long-term reliability, and reduce maintenance costs for end users.

Related Standards

• ISO 2408 – Steel wire ropes-Minimum requirements
• ISO 14343 – Steel wire ropes for general purposes-Test methods
• ISO 18264 – Steel wire ropes for mining-Lubricants
• ISO 10425 – Steel wire ropes-General principles for inspection
• Industry-specific lubrication standards related to machinery and corrosion protection

Together with ISO 4346, these complementary standards provide a comprehensive framework for the manufacture, quality assurance, and maintenance of steel wire ropes, ensuring they meet rigorous international performance and safety criteria.

By adhering to ISO 4346:1977, manufacturers can guarantee the use of high-quality lubricants that support optimal wire rope performance and durability in demanding operational contexts.