Orange rubber hose with a black inner lining for the fluids named in EN 16436-1. Orange is the cover colour that identifies this duty. Ordered by bore, working pressure class and the published standard the hose is marked to.
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Rubber hose of this class is identified by its cover colour before anything else. Orange is the cover colour for the duty covered by EN 16436-1; blue is oxygen and red is the fuel side in welding service. The hose photographed is orange with a black rubber lining, which is what the Gulf trade stocks.
Two published standards cover hose of this appearance and they are different products. EN 16436-1 covers rubber and plastics hose in the vapour phase - the hose that connects a cylinder, a regulator and an appliance - for working pressures from 0 to 30 bar in three classes, in ambient temperatures from -30 °C to +70 °C. EN ISO 3821 covers hose for welding, cutting and allied processes, at 2 MPa (20 bar) normal duty or 1 MPa (10 bar) light duty for bores up to 6.3 mm, and -20 °C to +60 °C. Check which of the two is printed on the hose before it goes on a line.
A length of hose and a made-up hose assembly are also different products under different standards: the assembly with its fittings is EN 16436-2, or ISO 8207 for welding hose. Fittings on the fuel side are left-hand threaded and notched around the nut, oxygen fittings are right-hand and plain, and the two must never be adapted to one another. State the bore, the length, the required standard and class, and whether the hose is wanted loose or made up with fittings.
| Colour and Duty Identification | Orange cover. ISO 3821 designates a hose by bore, duty and colour/media service; its own worked examples give blue for oxygen and "red and orange" for universal fuel media. In the Gulf trade orange is the medium named in its standard, the fluid named in the standard and utility supply cover colour and red is the fuel side. The standard's full colour table is not public, so confirm the media printed on the hose rather than relying on colour. |
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| Applicable Standard | Either EN 16436-1 (rubber and plastics hose in the vapour phase) or EN ISO 3821 (hose for welding, cutting and allied processes). They are different products - confirm which is printed on the hose supplied. |
| Working Pressure (EN 16436-1) | 0 bar to 30 bar. Three classes are defined in the standard's Table 1 by maximum working pressure and minimum ambient temperature - confirm the class marked on the hose supplied. |
| Ambient Temperature (EN 16436-1) | -30 °C to +70 °C |
| Working Pressure (EN ISO 3821) | 2 MPa (20 bar) normal duty; 1 MPa (10 bar) light duty for bores up to 6.3 mm |
| Temperature Range (EN ISO 3821) | -20 °C to +60 °C |
| Bore Sizes (EN ISO 3821 Table 1) | 4.0, 4.8, 5.0, 6.3, 7.1, 8.0, 9.5, 10.0, 12.5, 16.0, 20.0, 25.0, 32.0, 40.0 and 50.0 mm, with tolerances of ±0.4 to ±1.25 mm by size |
| Construction (EN ISO 3821) | Rubber lining not less than 1.3 mm (1.5 mm where the total wall exceeds 3.0 mm), reinforcement, and a rubber cover not less than 1.0 mm |
| Hose Assemblies | A hose with fittings attached is covered by a different standard - EN 16436-2 for the medium named in its standard, ISO 8207 for welding hose. The hose standard alone does not cover a made-up assembly. |
