ISO 9650-3:2009

Overview

ISO 9650-3:2009 - Small craft - Inflatable liferafts - Part 3: Materials - specifies requirements and test methods for materials used in inflatable liferafts covered by ISO 9650-1 and ISO 9650-2. The standard focuses on the properties, performance criteria and laboratory tests for coated fabrics, adhesives and exposed metallic parts to ensure durability, safety and regulatory compliance for small craft liferafts.

Key topics and technical requirements

• Scope: Materials for buoyancy chambers, floor, canopy support and canopy shall be single- or double-faced coated fabrics with an inherently rot‑proof base fabric.
• Mechanical strength:
  • Tensile strength (buoyancy/floor): ≥ 1500 N/50 mm (warp) and ≥ 1300 N/50 mm (weft); canopy ≥ 650 N/50 mm in warp and weft.
  • Tear strength (constant-rate method): buoyancy ≥ 80 N, canopy ≥ 30 N.
• Coating adhesion: Buoyancy materials ≥ 15 N/10 mm, canopy ≥ 5 N/10 mm (for glued/welded assemblies).
• Low-temperature performance: Low-temperature bend tests (ISO 4675) - specified test temperatures vary by component (e.g., buoyancy chambers and floor have specific −15 °C to −50 °C conditions depending on construction).
• Environmental resistance tests:
  • Ozone resistance (ISO 3011): no visible cracking.
  • Porosity test: no bubbles visible within 5 minutes after immersion procedure.
  • Ageing (ISO 1419 method B): no cracking, blistering or stickiness after 7 days at 70 °C.
  • Hydrolysis (ISO 1419 method C): 14 days at 70 °C, 95% RH with subsequent folding tests.
  • Oil resistance (ASTM No.1 oil): 2 h at 20 °C with no tackiness or coating separation.
  • Resistance to blocking (ISO 5978) and chamber seam strength (ISO 1421) with specified retention after ageing.
• Metals and adhesives: Exposed metallic parts must pass salt‑spray corrosion testing (ISO 9227: two 24 h cycles separated by a 2 h dry period). Adhesives must be compatible and tested using the same preparation and application methods used in manufacture.
• Testing conditions: Standard atmospheres per ISO 2231 (Atmosphere B) and specified specimen preparation and methods.

Applications and users

ISO 9650-3:2009 is essential for:

• Liferaft and small craft manufacturers specifying or qualifying materials
• Material suppliers and coated-fabric producers
• Test laboratories and conformity assessment bodies
• Classification societies, maritime safety inspectors and procurement teams seeking compliance with marine safety standards

Using this standard helps ensure inflatable liferafts meet durability, safety and performance expectations under mechanical, thermal and environmental stress.

Related standards

• ISO 9650-1, ISO 9650-2 (liferaft types)
• ISO 1419, ISO 1421, ISO 2231, ISO 2411, ISO 3011, ISO 4674-1, ISO 4675, ISO 5978, ISO 9227
• ISO/TR 6065; IMO Res. A.689 / MSC.81(70) (testing recommendations)

Keywords: ISO 9650-3:2009, inflatable liferafts materials, coated fabrics, liferaft materials testing, marine safety compliance, buoyancy chamber materials.