Overview
ISO 5620-1:1992 specifies general requirements for filling connections used to supply drinking water tanks aboard ships. The standard covers the composition, designation and basic installation guidance for a complete ship piping filling connection intended for attachment to piping from another ship or a land distribution system. Its primary objective is to safeguard potable water tanks and supply piping from contamination by other fluids and to ensure interoperable, secure connections between ship and shore services.
Key topics and technical requirements
- Connection principle: Uses special watering flanges (A, B, C) with a five‑point connection (see figure references in the standard) to mate ship and supply flanges.
- Nominal size and pressure: Flange connections and piping are specified as DN 65 and PN 16 respectively.
- Materials and mechanical properties: Flange connections shall be of weldable steel with tensile strength ≥ 360 MPa.
- Corrosion protection: Hot‑dip galvanizing in accordance with ISO 1461 or an alternative coating that poses no health hazard.
- Sealing: A gasket suitable for drinking water systems is required on the ship watering flange.
- Security: The ship’s blind flange is to be secured by a corrosion‑resistant padlock fitted to a securing bolt at the lower part of the connection to prevent unauthorized access.
- Component fixation: Stud‑bolts and securing bolts are to be spot‑welded or adhesively fastened into the ship watering flange.
- Composition and designation: The standard defines a composition code (example: composition Z) and a designation format for ordering (e.g., “Connection ISO 5620-1 - Z”).
- Installation recommendation: The ship flange connection is recommended to be installed in a suspended position with use of a bent pipe to facilitate connection and drainage.
Applications and users
ISO 5620-1 is intended for:
- Shipbuilders and marine structural engineers specifying potable water filling connections.
- Naval architects and ship outfitters integrating shore/ship water supply interfaces.
- Ship operators and fleet managers procuring standardized, interoperable connections.
- Marine equipment manufacturers and suppliers of watering flanges, gaskets and padlocks.
- Classification societies, port authorities and surveyors assessing compliance and safety.
Practical uses include new construction, retrofits, maintenance, procurement specifications and ensuring compatibility between ship and shore water services.
Related standards
- ISO 5620-2:1992 - Part 2: Components (detailed component specifications)
- ISO 1461 - Metallic coatings - Hot dip galvanized coatings (corrosion protection)
Note: National port regulations and statutory rules for drinking water distribution remain applicable and should be observed in conjunction with ISO 5620-1.
Open preview (PDF)Shipbuilding and marine structures — Filling connection for drinking water tanks — Part 1: General requirements