ISO 24045:2021 PDF

Overview

ISO 24045:2021 specifies requirements for adjustable roller‑type chain stoppers used in ships and marine technology. The standard covers design, strength, safety, function, operation, structure, materials, acceptance and marking for these devices. Adjustable roller‑type chain stoppers are fixed to the ship structure (installed between the windlass and hawse pipe) to guide, lock and bear anchor chain loads during navigation and anchoring.

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Key topics and technical requirements

• Design and strength
  • Must withstand a design load equal to 80% of the nominal breaking load of the corresponding anchor chain (aligned with ISO 6325 Class A cable stoppers).
  • Design stress shall not exceed the material yield stress; calculations are specified in Annex A (strength calculations).
  • Components and dimensions given as reference in tables; final sizing should be based on strength calculations.
• Function and operation
  • Installed between windlass and hawse pipe to control and lock anchor chain and bear specified loads.
  • Manual operation required under no load; maximum operating forces specified:
    • Anchor chain diameter