Overview
ISO 10807:1994 specifies design, material, manufacturing and testing requirements for corrugated flexible metallic hose assemblies used to protect electrical wires and cables in explosive atmospheres or fire-risk environments. The standard covers hoses intended for static protection or for cables moved infrequently (less than once per week). It includes instructions for use (Annex A), type-approval tests (Annex B) and marking/ordering details.
Key topics and requirements
- Materials
- Hose body: either topper alloy (topper content ≥ 94 %, per ISO 1634) or austenitic stainless steel (per ISO 683‑13).
- End fittings: non-alloy steels (per ISO 4948) or austenitic stainless steel.
- Braiding options: bronze wire (ISO 427) or austenitic stainless steel.
- Manufacturing and joints
- Permitted joining: braze welding, electric welding (MIG, MAG, TIG), microplasma (MP) or impulse welding.
- Excluded: adhesive bonding and tin soldering.
- Dimensions & performance
- Nominal diameters, minimum bend radii and maximum lengths are defined (tables and figures in the standard).
- Internal surfaces must be free from burrs/sharp edges to avoid cable damage.
- Testing and type approval (Annex B)
- Hydraulic test: each assembly tested at a minimum of 40 bar for at least 60 s with no leakage.
- Flexural strength test: bending over shaping cylinders as specified; dimensional and visual inspections required.
- Bending fatigue test: samples cycled (1 bar pressure, 40–120 cycles/min, 250 mm displacement); minimum cycles to failure not less than 10,000.
- Approved hoses require certification and specific marking by the authorized agency.
- Use guidance (Annex A)
- Classification of locations: Class A (protected), Class B (exposed to corrosive agents) and Class C (highly corrosive). Material choices and additional protections are specified per class.
- Marking & designation
- Example format: TMFAE ISO 10807 DN40 - 800 - stainless steel - B (manufacturer, standard ref, DN, length, material, class).
Applications and who uses this standard
- Protecting electrical cables in hazardous/explosive atmospheres (petrochemical plants, offshore installations, refineries, chemical plants).
- Suitable for static cable protection or for cables moved infrequently.
- Primary users: hose and cable assembly manufacturers, electrical/mechanical engineers, procurement officers, certification bodies, inspection agencies, and safety managers responsible for explosion-proof installations.
Related standards
Keywords: ISO 10807:1994, corrugated flexible metallic hose, explosive atmospheres, electrical cable protection, type approval, hydraulic test, bending fatigue, hose assemblies.
Open preview (PDF)Pipework — Corrugated flexible metallic hose assemblies for the protection of electrical cables in explosive atmospheres
