ISO 4079:2020

Overview

ISO 4079:2020 - Rubber hoses and hose assemblies - Textile‑reinforced hydraulic types for oil‑based or water‑based fluids - Specification - defines construction, dimensions and performance requirements for textile‑reinforced hydraulic hoses and hose assemblies (nominal sizes 5 to 100). The sixth edition (2020) covers five hose types and is intended for use with oil‑based hydraulic fluids (HH, HL, HM, HR, HV) at −40 °C to +100 °C, water‑based fluids (HFC, HFAE, HFAS, HFB) at −40 °C to +70 °C, and water at 0 °C to +70 °C. The standard specifies hoses and hose assemblies but does not set requirements for end fittings; compatibility with fluids is the user’s responsibility in consultation with manufacturers.

Key topics and technical requirements

• Hose types and classification: Type 1TE, 2TE, 3TE, R3 and R6 (distinguished by reinforcement layers, working pressure and minimum bend radius).
• Materials & construction: Rubber inner lining compatible with oil/water fluids, textile reinforcement layers, and weather/oil‑resistant cover; designed to accept fittings without removing the cover.
• Dimensions & tolerances: Inside/outside diameters, concentricity and length guidance (nominal sizes 5–100); some dimensions harmonized with EN 853.
• Performance testing: Hydrostatic tests (proof and minimum burst pressure), change in length at working pressure, minimum bend radius, impulse resistance (oil and water‑based), leakage and low‑temperature flexibility.
• Durability checks: Resistance to vacuum, abrasion, ozone, fluid exposure, adhesion between components. Specific test methods reference ISO standards such as ISO 1402, ISO 6605, ISO 6803, ISO 7233 and ISO 1817.
• Marking & quality control: Requirements for hose and assembly marking, type and routine test frequencies, and recommended production acceptance tests (Annexes A–C).

Applications and users

ISO 4079:2020 is aimed at professionals specifying, manufacturing, testing or maintaining hydraulic hose systems:

• Hose manufacturers and assemblers - design, production and QA of textile‑reinforced hydraulic hoses.
• OEMs and system integrators - selection of hoses for mobile and industrial hydraulic equipment.
• Procurement and specification engineers - writing performance and test requirements into contracts.
• Test laboratories and maintenance teams - performing hydrostatic, impulse and durability testing and verifying compliance.

Practical tip: always confirm hose/fluid compatibility and correct end‑fitting selection with the hose manufacturer before installation.

Related standards

Normative references include ISO 1402, ISO 6605, ISO 6743‑4, ISO 6803, ISO 7233, ISO 1817, ISO 8033, ISO 7326, ISO 8330 and ISO 10619 (parts 1 & 2). These provide the test methods and fluid classifications used by ISO 4079:2020.