What is a safety factor in pneumatic hoses?
The ratio of the working pressure to the burst pressure of a hose (at which permanent hose failure occurs) is referred to as the safety factor and is usually 3.
What is the marking of pneumatic hoses?
Pneumatic hoses are designated by specifying standards, the material of construction, outer diameter and wall thickness. For example, a hose made according to 73378 standard, from PA12 polyamide, with an outer diameter of 8mm and a wall thickness of 1mm can be marked like this: DIN 73378 PA12 S40-PHL 8x1mm.
What is hose flexibility and how is it determined?
The flexibility of a hose depends on the raw material and additives (plasticisers) used to manufacture the hose. Manufacturers determine flexibility by indicating the bending radius - the smaller the radius, the more flexible the hose.
What is a calibrated pneumatic hose?
Calibrated air hoses are manufactured in accordance with European standards, e.g. DIN 73378, DIN 74324, which ensure not only thermal but, most importantly, dimensional stability. Dimensional tolerance depends on the diameter and can vary from +/- 0,1mm (for small diameters) to +/-0,2mm (for large diameters).
How does temperature affect the working pressure of a pneumatic hose?
As the temperature increases, the pressure resistance of the hose decreases. For exact values, given as a percentage, please refer to the supplier’s data sheets.