ISO 1825:2026

Overview

ISO 1825:2026 specifies the dimensions, construction, and requirements for four types of rubber hoses and hose assemblies intended for use in aircraft ground fuelling and defuelling operations. Developed by the International Organization for Standardization (ISO), this standard harmonizes safety, performance, and quality requirements, ensuring compatibility and reliability across the aviation industry worldwide. The hoses covered by this specification are designed for use with petroleum fuels containing up to 30% aromatic hydrocarbons by volume and function reliably in a broad range of temperatures.

Key Topics

• Classification and Types: The standard outlines four types of hoses (B, C, E, F) distinguished by their construction and electrical properties, as well as two temperature classes (normal and low temperature).
  • Types B and E: Electrically bonded with low-resistance conductive wires.
  • Types C and F: Electrically conductive hose with a conductive rubber compound.
• Performance Requirements: Addresses working pressure (up to 2.0 MPa), temperature resistance (service from −30°C to +65°C and storage from −40°C to +70°C; LT hoses operate from −40°C, store up to −48°C), and resistance to petroleum fuels.
• Material and Construction: Specifies synthetic rubber liners, layers of textile reinforcement, conductive covers, and embedded helix reinforcement for certain types, ensuring durability and resistance to abrasion and weathering.
• Physical and Electrical Properties: Detailed criteria on tensile strength, elongation, abrasion resistance, fuel resistance, ozone resistance, flexibility, crush recovery, cyclic kinking, flammability, hydrostatic strength, and electrical continuity.
• Marking and Certification: Requirements for clear hose marking, identification, and certification for traceability and safety verification.
• Testing and Quality Assurance: Includes comprehensive testing protocols for routine and type approval, cleanliness after manufacture, and protection during shipment and storage.

Applications

ISO 1825:2026 is essential for manufacturers, suppliers, and operators involved in the production and use of aircraft ground fuelling equipment. Its practical value includes:

• Aircraft Ground Handling: Ensures hoses and assemblies reliably deliver aviation fuels to aircraft and safely remove residual fuel, minimizing the risk of spills and static discharge.
• Airport Fuel Infrastructure: Standardizes hoses for hydrant carts, fuel trucks, and refuelling pits, supporting safe operation under wide-ranging environmental conditions.
• Manufacturing and Quality Control: Assists hose manufacturers and assembler companies to comply with international aviation standards, streamlining approval and procurement for airports and airlines.
• Maintenance and Safety Inspection: Provides a framework for periodic inspection, hydrostatic testing, and electrical continuity checks, ensuring ongoing safety in ground fuelling operations.

Related Standards

Organizations referring to ISO 1825:2026 should also consider the following relevant standards:

• ISO 1402: Hydrostatic testing of rubber and plastics hoses and assemblies.
• ISO 1817: Determination of the effect of liquids on rubber.
• ISO 8031: Determination of electrical resistance and conductivity in hoses.
• ISO 4649: Determination of abrasion resistance.
• ISO 7326: Ozone resistance testing under static conditions.
• ISO 10619-2: Flexibility and stiffness measurement at low temperatures.
• EI 1529: Aviation fuel handling hoses, referenced for temperature and testing alignment.

Compliance with ISO 1825:2026 ensures that rubber hoses and hose assemblies meet international expectations for safety, reliability, and durability in the demanding environment of aircraft ground fuelling and defuelling operations. Adopting this standard promotes operational confidence, regulatory compliance, and streamlined maintenance across the aviation fuel supply chain.