ISO 13733-2020 PDF

Full title and description

Ships and marine technology — Ship's mooring and towing fittings — Universal fairleads with upper roller. This International Standard specifies the types, nominal sizes, dimensions and materials, and sets construction, manufacturing and marking requirements for universal fairleads with upper roller(s) used to lead the mooring rope of a ship.

Abstract

ISO 13733:2020 defines design and dimensional requirements, nominal sizes, permitted materials and essential manufacturing and marking provisions for universal fairleads fitted with one or more upper rollers. The standard is intended to ensure interchangeability, safe operation and consistent performance of fairleads used in ship mooring and towing applications.

General information

• Status: Published.
• Publication date: August 2020 (2020-08).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 47.020.50 (Deck equipment and installations); developed by ISO/TC 8/SC 4.
• Edition / version: Edition 2 (2020).
• Number of pages: 20 (official ISO edition details).

Scope

Specifies the types, nominal sizes, dimensions and materials, and the construction, manufacturing and marking requirements for universal fairleads with upper roller(s) installed to lead the mooring rope of a ship. It replaces the previous edition ISO 13733:2012 and applies to fairleads intended for normal mooring and towing operations on ships.

Key topics and requirements

• Definition of universal fairlead types and nominal sizes (dimensional tables and roller diameters).
• Material and manufacture requirements for rollers, shells and mountings suitable for marine service.
• Construction and welding/assembly criteria to ensure mechanical integrity under mooring loads.
• Marking and traceability requirements (identification of size/type and manufacturer).
• Design considerations for single and multiple rope-pass openings and load arrangements.
• Requirements to ensure compatibility with shipboard mooring ropes and related deck fittings.

Typical use and users

Used by shipbuilders, naval architects, deck-equipment manufacturers, classification societies, shipowners/operators, shipyards and procurement/specification teams when selecting, manufacturing, certifying or installing universal fairleads with upper rollers. It is referenced in technical specifications for newbuilds, refits and equipment procurement to ensure fitness for purpose and compliance with international practice.

Related standards

Other standards in the "ship's mooring and towing fittings" family and related deck-equipment standards include ISO 13767 (shipside roller fairleads), ISO 13797 (cruciform bollards), ISO 13798 / ISO 13799 (recessed bitts — plate and casting types), ISO 13776 (pedestal fairleads), ISO 3730 (mooring winches) and more recent/adjacent items such as ISO 18824 (horizontal roller fairleads). These form a coordinated set of documents covering bitts, bollards, fairleads and mooring machinery.

Keywords

universal fairlead, upper roller, mooring fittings, towing fittings, deck equipment, ship mooring, ISO 13733, dimensions, marking, marine fittings

FAQ

Q: What is this standard?

A: ISO 13733:2020 is an International Standard that specifies types, sizes, dimensions, materials, construction and marking requirements for universal fairleads fitted with upper roller(s) used in ship mooring and towing.

Q: What does it cover?

A: It covers nominal sizes, dimensional specifications, acceptable materials, construction/manufacturing requirements and marking/identification for universal fairleads with upper rollers, intended to lead mooring ropes on ships. It ensures safe, consistent design and compatibility with other deck fittings.

Q: Who typically uses it?

A: Shipyards, equipment manufacturers, classification societies, ship designers, purchasers and marine engineers use the standard when specifying, producing, testing or certifying fairleads for ships.

Q: Is it current or superseded?

A: ISO 13733:2020 is the current edition published in August 2020; it replaces ISO 13733:2012. Users should check for any amendments or newer related standards published after 2020 when preparing specifications.

Q: Is it part of a series?

A: Yes — it belongs to a group of ISO documents covering ship's mooring and towing fittings and deck equipment (same ICS 47.020.50), which together cover fairleads, bollards, bitts and mooring machinery; purchasers often reference multiple related ISO items for complete deck equipment specifications.

Q: What are the key keywords?

A: Universal fairlead, upper roller, fairlead dimensions, mooring rope, deck equipment, towing fittings, marking, ISO 13733, ship mooring.