Overview
ISO 13363:2016 - "Rubber and plastics hoses for marine-engine wet-exhaust systems - Specification" defines construction, performance and test requirements for hoses used where exhaust gases are mixed with cooling water (wet-exhaust systems). It covers three hose types (softwall, hardwall with embedded helical wire, and short flexible connectors) and two classes (Class A for diesel engines; Class B for petrol engines and very-high-temperature diesel applications). The standard excludes outboard motors and personal watercraft.
Key topics and requirements
- Types & classes
- Type 1: softwall, oil-resistant material with synthetic-fabric reinforcement.
- Type 2: hardwall, oil-resistant with synthetic-fabric reinforcement and embedded helical wire.
- Type 3: short flexible connector, with or without reinforcement, for protected locations.
- Class A: diesel-engine service; Class B: petrol or very-high-temperature diesel service (plastics not permitted for Class B).
- Materials & construction
- Smooth-bore water- and heat-resistant lining; oil/fuel-resistant linings for Class A.
- Synthetic-fabric reinforcements (not required for Type 3); helical wire for Type 2; covers resistant to ozone, heat and abrasion (not required for Type 3).
- Dimensions
- Nominal bores covered (e.g., 32–127 mm) with defined inside-diameter tolerances and minimum bend radii measured per ISO 4671.
- Performance & physical tests
- Minimum burst pressure: ≥ 0.25 MPa (2.5 bar) (ISO 1402).
- Tensile strength / elongation minima for lining and cover (e.g., lining ≥ 8 MPa and ≥ 200% elongation; cover ≥ 7 MPa and ≥ 200% elongation).
- Accelerated ageing, heat-resistance (Annex A) - hoses must withstand 2 minutes of exhaust gas at specified temperatures (typically 370 °C for Class A and 580 °C for Class B).
- Compression set (rubber hoses) ≤ 45% after 24 h at 100 °C.
- Liquid resistance for Class A linings (ISO 1817); plastics loss-in-mass ≤ 4% (ISO 176).
- Flexibility, ozone (rubber), UV (plastics) and adhesion (≥ 1.5 kN/m) tests.
- Long-term ageing: 1 000 h at 85 °C with retention limits on burst pressure and adhesion.
- Marking & quality
- Specifies marking and test frequency, and normative test/acceptance procedures for manufacturers and purchasers.
Applications and users
ISO 13363:2016 is used for:
- Marine equipment manufacturers and hose suppliers specifying compliant wet-exhaust hoses
- Naval architects, OEMs and boat builders for component selection
- Marine surveyors, classification societies and procurement teams for acceptance testing
- Maintenance and repair yards for replacement and inspection criteria
Keywords: ISO 13363:2016, marine-engine wet-exhaust, rubber hoses, plastics hoses, exhaust hose specification, burst pressure, heat resistance, marine hoses.
Related standards
Normative references include ISO 37, ISO 48, ISO 1402, ISO 1817, ISO 4671, ISO 7326, ISO 8033, ISO 8330, ISO 10619-1, ISO 30013, ISO 176 and ISO 188 - used for the specific test methods cited in ISO 13363.
