ISO 2398:2024
Rubber hoses, textile-reinforced, for compressed air

Standard No.

ISO 2398:2024

Release Date

2024

Published By

International Organization for Standardization (ISO)  IX  /  ISO

Latest

ISO 2398:2024

Introduction

Analysis of the core content of the standard

The seventh edition of ISO 2398:2024 has comprehensively updated the technical specifications for textile-reinforced rubber compressed air hoses, which are mainly suitable for industrial scenarios with working pressure ≤2.5MPa (25bar) and working temperature range of -40°C to +70°C. The standard uses the three-dimensional system of type-grade-category to achieve accurate product classification.

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Classification system and technical parameters

Dimension	Classification	Technical indicators
Pressure type	Type 1 (low pressure)	1MPa(10bar)
	Type 2 (medium pressure)	1.6MPa(16bar)
	Type 3 (high pressure)	2.5MPa(25bar)
Oil resistance grade	Class A (non-oil resistant)	-
	Class B (conventional oil resistant)	Volume expansion ≤115%
	Class C (high oil resistant)	Volume expansion ≤30% (inner layer) ≤75% (outer layer)
Temperature category	NT (normal temperature)	-25°C~+70°C
	LT (low temperature)	-40°C~+70°C

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Key performance indicators

1. Dimensional tolerance requirements

Inner diameter tolerance follows ISO 4671 standard, typical values such as Φ25mm hose allowable range is 23.75-26.25mm. Concentricity requirements: ≤76mm pipe diameter deviation ≤1.0mm, >76mm pipe diameter deviation ≤1.5mm.

2. Physical performance benchmarks

• Rubber compound: Tensile strength ≥7MPa, elongation at break ≥250%
• Aging performance: Tensile strength change after aging at 100°C×3 days ≤±25%
• Burst pressure: Type 3 hose must reach 10MPa (100bar)

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Test specification update highlights

Main revisions to the 2024 version:

1. Delete the original Appendix B and optimize the test requirements table A.1
2. When the type test cycle is clearly 5 years or the process is changed
3. Add a 3-point sampling rule for production batches for routine testing (first/middle/last)

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Implementation suggestions

Selection Guide

Mining equipment is recommended to use the Type 3/Class C/LT combination, which can meet the requirements of high pressure, oil resistance and low temperature conditions. Ordinary workshop pneumatic tools can meet the requirements using Type 1/Class A/NT.

Quality Control Points

• Focus on the minimum thickness of the lining layer (Type 3 requires ≥2.0mm)
• Low-temperature applications must verify the pressure resistance after the -40°C bending test
• Oil-resistant hoses need to monitor the volume expansion rate after 72 hours of oil immersion

ISO 2398:2024 Referenced Document

• ISO 10619-1 Rubber and plastics hoses and tubing - Measurement of flexibility and stiffness- Part 1:Bending tests at ambient temperature
• ISO 10619-2 Rubber and plastics hoses and tubing - Measurement of flexibility and stiffness - Part 2: Bending tests at sub-ambient temperatures
• ISO 1307 Rubber and plastics hoses - Hose sizes, minimum and maximum inside diameters, and tolerances on cut-to-length hoses
• ISO 1402 Rubber and plastics hoses and hose assemblies - Hydrostatic testing
• ISO 1817 Rubber, vulcanized or thermoplastic
• ISO 188 Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
• ISO 37 Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
• ISO 4671 Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of hoses and the lengths of hose assemblies
• ISO 7326:2016 Rubber and plastics hoses - Assessment of ozone resistance under static conditions
• ISO 8033 Rubber and plastics hoses - Determination of adhesion between components
• ISO 8330 Rubber and plastics hoses and hose assemblies — Vocabulary

ISO 2398:2024 history

• 2024 ISO 2398:2024 Rubber hoses, textile-reinforced, for compressed air
• 2016 ISO 2398:2016 Rubber hoses, textile-reinforced, for compressed air - Specification
• 2006 ISO 2398:2006 Rubber hoses, textile-reinforced, for compressed air - Specification
• 1995 ISO 2398:1995 Rubber hose, textile-reinforced, for compressed air - Specification
• 1987 ISO 2398:1987 Industrial rubber hose for compressed air (up to 2,5 MPa)
• 1978 ISO 2398:1978 Industrial rubber hose for compressed air (up to 2,5 MPa)
• 1975 ISO 2398:1975 Title missing - Legacy paper document

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