Overview
ISO 6134:2024 - "Rubber hoses and hose assemblies for saturated steam - Specification" sets requirements for rubber hoses, hose assemblies and metal hose fittings intended to convey saturated steam and hot‑water condensate. The fifth edition defines two pressure types (low and high) and two cover classes (oil‑resistant or non‑oil‑resistant), and details construction, dimensions, performance testing and marking for safe, reliable steam hoses.
Key Topics
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Scope & classification
- Type 1 (low pressure): maximum working pressure 0.6 MPa (6 bar).
- Type 2 (high pressure): maximum working pressure 1.8 MPa (18 bar).
- Each type is split into Class A (non‑oil‑resistant cover) and Class B (oil‑resistant cover). Options for electrically bonded (marked “M”) or electrically conductive (marked “Ω”) hoses are included.
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Materials & construction
- Steam‑resistant linings, textile reinforcement for Type 1 and steel‑wire reinforcement for Type 2, and covers designed to resist heat, wear and environment. Covers must be evenly pricked to relieve inter‑ply pressure.
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Dimensions & flexibility
- Standard inside diameters cover a range (examples in the standard from about 9.5 mm to 102 mm) with specified minimum bend radii and concentricity tolerances.
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Performance & testing
- Hydrostatic/burst and proof testing (ISO 1402), steam resistance tests (ISO 4023), adhesion (ISO 8033), bending (ISO 10619‑1), ozone resistance (ISO 7326) and electrical resistance (ISO 8031) are specified. Burst pressure and proof pressure multiples of maximum working pressure, steam short‑ and long‑term exposure cycles, and acceptance criteria are all defined.
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Practical requirements
- Prohibits quick‑release couplings, requires fittings that allow tightening to compensate for rubber creep, and provides cautions about service life reduction under superheated steam and risk of lining separation under vacuum.
Applications
ISO 6134 is essential for manufacturers, end‑users, procurement teams, safety and maintenance engineers, test laboratories and compliance officers involved with steam systems. Typical uses include industrial steam distribution, condensate return lines, steam cleaning equipment and process plant connections where standardized, tested rubber steam hoses and assemblies are required.
Related Standards (if applicable)
Standards referenced or aligned with ISO 6134:2024 include ISO 1402, ISO 4023, ISO 8031, ISO 10619‑1, ISO 4671, ISO 37, ISO 188, ISO 1817, ISO 4649, ISO 7326, ISO 8033 and ISO 8330 - all governing testing methods, properties and terminology for rubber hoses and components.
Keywords: ISO 6134, rubber hoses, steam hose specification, saturated steam, hose assemblies, maximum working pressure, steam hose testing, hose fittings.