Overview
ISO 2398:2024 - "Rubber hoses, textile‑reinforced, for compressed air - Specification" defines requirements for textile‑reinforced rubber hoses used with compressed air. The standard covers three hose types (low, medium, high pressure), three oil‑resistance classes (A, B, C), and two temperature categories (N‑T and L‑T). It applies to hoses up to a maximum working pressure of 2,5 MPa (25 bar) and an operating temperature range from −40 °C to +70 °C depending on type and category.
Key topics and technical requirements
- Types and classes
- Type 1 (low): max working pressure 1 MPa (10 bar)
- Type 2 (medium): 1,6 MPa (16 bar)
- Type 3 (high): 2,5 MPa (25 bar)
- Class A: non‑oil‑resistant; B: normal oil resistance; C: good oil resistance
- Category N‑T: −25 °C to +70 °C; L‑T: −40 °C to +70 °C
- Materials & construction
- Hose = rubber lining + textile reinforcement + rubber cover
- Lining and cover must be uniform, concentric and free from defects
- Dimensions & tolerances
- Inside diameters specified for sizes from ~4 mm to 102 mm (see table in standard)
- Concentricity tolerance: ≤ 1,0 mm for id ≤ 76 mm; ≤ 1,5 mm for larger sizes
- Minimum lining/cover thickness specified per type (e.g., Type 1 lining 1,0 mm / cover 1,5 mm)
- Physical properties
- Compound minimum tensile strength: 7,0 MPa; elongation ≥ 250 %
- Proof and burst pressures (finished hose): e.g., Type 1 proof 2,0 MPa (20 bar), burst 4,0 MPa (40 bar); Type 3 proof 5,0 MPa (50 bar), burst 10,0 MPa (100 bar)
- Adhesion between components ≥ 2,0 kN/m
- Ozone resistance, flexibility (T/D ≥ 0,8 at 23 °C) and low‑temperature flexibility tests specified
- Testing & conformity
- Type tests (full design qualification) and routine tests (per length or lot) defined in Annex A
- Type tests repeated at most every five years or after material/manufacture changes
- Marking
- Durable marking must include manufacturer, reference to ISO 2398, type/class, category (if L‑T), inside diameter, working pressure and date (example: XXXX/ISO 2398/2B/L‑T/25 mm/1,6 MPa (16 bar)/2Q23).
Applications and users
ISO 2398 is intended for manufacturers, designers, procurement specialists, testing laboratories and quality engineers involved with compressed air hoses, pneumatic systems, industrial workshops, and plant maintenance. It guides selection, production control, acceptance testing and product labelling for safe, reliable compressed‑air hose assemblies.
Related standards
Normative references in ISO 2398 include: ISO 37, ISO 188, ISO 1307, ISO 1402, ISO 1817, ISO 4671, ISO 7326, ISO 8033, ISO 8330, ISO 10619‑1 and ISO 10619‑2 - all relevant for testing, dimensions and vocabulary for rubber and plastics hoses.
