Overview
EN ISO 12216:2022 (identical to ISO 12216:2020) is a CEN-adopted international standard that specifies strength and watertightness requirements for windows, portlights, hatches, deadlights and doors on small craft with hull length (LH) up to 24 m (as defined in ISO 8666:2016). The standard covers technical requirements, test methods and assessment procedures for appliances that are critical to a craft’s watertight integrity and safety. It takes into account craft type, design category, and the location of the appliance; openings fitted below Area I are excluded.
Key topics and requirements
- Scope and definitions: Precise definitions of openings, plates, device types, and location areas (Area I, IIa, etc.).
- General requirements: Mandatory consideration of other applicable international standards and minimum requirements for strength and watertightness.
- Plate materials: Guidance and restrictions for materials such as acrylic sheet and glass, including special rules for laminated or high-impact-resistant glass.
- Fastening and end-connections: Requirements for plate end-connections, simply supported vs semi-fixed plates, glued plates, frames, fastenings and stiffeners.
- Watertightness tests: Minimum degree of watertightness and additional requirements for appliances affecting hull integrity; normative test methods are included (see Annex D).
- Strength assessment methods: Several options for verifying structural adequacy:
- Direct calculation methods for monolithic plates (including selection of thickness, aspect-ratio coefficients, design pressure and safety factors)
- Laminated glass calculation
- Advanced calculation methods
- Pressure test assessment method
- Annexes and tools: Normative and informative annexes cover unsupported plate dimensions (Annex C), test methods (Annex D), high-impact glass (Annex E), precalculated tables (Annex F) and location-area diagrams (Annex A).
Practical applications and users
This standard is essential for:
- Naval architects and boat designers specifying windows, hatches and doors to meet regulatory and safety requirements.
- Manufacturers of portlights, hatches and companionways ensuring product compliance and durability.
- Shipyards and fitters performing installations and repairs in accordance with accepted test methods and fastening rules.
- Classification societies, surveyors and regulators assessing conformity with CE/EU directives and national standards.
- Marine equipment testers performing strength and watertightness tests defined in the standard.
Using EN ISO 12216:2022 helps reduce water ingress risk, supports regulatory compliance across CEN member countries, and provides robust, harmonized procedures for design verification and type-testing.
Related standards
- ISO 8666 (small craft - principal data, including hull length LH)
- EN ISO 12216:2018 (superseded by this version)
Keywords: EN ISO 12216:2022, ISO 12216:2020, small craft, windows, portlights, hatches, deadlights, doors, strength requirements, watertightness, test methods, plate materials.