ISO 1825:2017

Overview

ISO 1825:2017 - "Rubber hoses and hose assemblies for aircraft ground fuelling and defuelling - Specification" defines the construction, dimensions and performance requirements for four types of rubber hoses and hose assemblies used in all ground aircraft fuelling and defuelling operations. The standard covers compatibility with petroleum fuels (aromatic content ≤ 30% by volume), environmental and storage temperature limits, and a maximum working pressure of 2.0 MPa (20 bar) including pressure surges.

Key topics and technical requirements

• Hose types and classification
  • Four types: B, C, E, F with grades indicating electrical properties (electrically bonded M or electrically conductive Ω).
  • Type C: general pressure applications on fuelling vehicles.
  • Type F: high-flow plane delivery where Type C is unsuitable.
  • Types E & F: improved kink resistance for vehicle/rail loading, trailer transfers and riser supply.
• Materials & construction
  • Inner lining: synthetic rubber resistant to petroleum fuel.
  • Reinforcement: woven, braided or spiral textile layers; types E/F include an embedded helix (type E helix: galvanized hard steel).
  • Outer cover: synthetic, electrically conductive, abrasion- and weather-resistant.
  • Types B and E include low-resistance conductive wires for electrical bonding.
• Dimensional and mechanical limits
  • Specified nominal internal diameters and tolerances (examples: 19.0 mm ±0.8 mm, 100.0 mm ±1.6 mm).
  • Minimum lining and cover thicknesses (not less than 1.6 mm for lining; cover thickness depends on bore).
  • Designed to remain circular when reeled - specified service reeling diameters for common hose sizes.
• Performance and testing
  • Tests and normative annexes cover hydrostatic strength, cold flexibility, crush recovery, cyclic kinking resistance, flammability and fuel contamination/fuel-soluble matter tests.
  • Electrical resistance/conductivity and secure attachment of couplings are specified (see Clause 9 and associated test methods).

Practical applications and users

ISO 1825:2017 is intended for:

• Hose manufacturers and R&D teams specifying materials, construction and test methods for aviation fuelling hoses.
• Airport operations, fuelling contractors and ground handling companies selecting hoses for refuelling/defuelling, vehicle/rail loading, trailer transfers and riser supply.
• Procurement, maintenance and safety engineers ensuring hoses meet temperature, pressure, electrical bonding and contamination resistance requirements.
• Testing laboratories and certification bodies applying the standard’s normative test methods and acceptance criteria.

Related standards

ISO 1825:2017 references several related ISO documents used for test methods and definitions, including ISO 1402 (hydrostatic testing), ISO 8031 (electrical resistance), ISO 4671 (dimensional measurements), ISO 1817 (effect of liquids) and others listed in Clause 2.

Keywords: ISO 1825:2017, rubber hoses, hose assemblies, aircraft ground fuelling, defuelling, aviation refuelling hoses, electrically bonded, electrically conductive, hose specifications.