| 摘要 |
<p>A tube for railroad pressurized air braking systems comprises a tube substrate made of a synthetic rubber, at least a reinforcement fabric material layer arranged above the substrate and a further synthetic rubber layer coating the at least a reinforcement fabric material layer, the tube comprising moreover at least a layer of a heat resistant material arranged above the synthetic rubber layer and coated by an outer synthetic rubber layer. With respect to prior braking system tubes, the inventive tube has the advantage that it can resist up to a free-flame temperature, i.e. a temperature of about 700-800°C, for a time of at least 15 minutes, while preserving its operating properties (such as a pressure resistance up to 5 atm).</p> |
