Stafford cables in Tibet

Stafford-based Flexicon has supplied 40 kilometres of flexible conduit to protect cabling installed in 361 high altitude carriages used on the world’s highest railway in Tibet. The railway rises to an altitude of 5,000 metres above sea level and the conduit has to withstand temperatures down to -50oC to protect the cabling from snow, grit, dirt and ball lightening.

The flexible conduit has a metal interior to provide strength over a plastic outer covering. It also carries an IP68 rating as it is often immersed in freezing water with the build up of snow.

The carriages have enriched oxygen and UV protection systems and the air has up to 40 per cent less oxygen than at sea level. Several oxygen factories are positioned along the length of the railway to replenish this internal environment. In addition, the water in the toilets is heated to avoid freezing conditions.

Flexicon export manager Jeremy Curtis said: ‘Clearly it is vital to protect the cabling for such high altitude carriages.’

He added: ‘This flexible conduit has been developed to withstand the harshest of conditions and will last for more than ten years.’