求翻译：确保服役长输油气管线的安全运营是实现管线节能、高效输油的关键。一条长输管道自建成并投入使用后,就会存在非常规危害的风险。而建于上世纪七、八十年代的管线已经处于寿命的中后期，管线运行存在着一定的危险性。为了预测整个管线的安全状况，确定管线剩余寿命，有必要对管线进行风险评价。是什么意思？

To ensure the safe operation of serving long-distance oil and gas pipelines to the pipeline energy saving, high efficiency oil. A long distance pipeline and put into use, there will be a risk of unconventional hazards. Pipeline was built in the seventies and eighties of the last century has been lat

Ensure that service the long distance transmission oil and gas pipelines pipeline security operations is to achieve energy efficiency, and fuel-efficient the key. A pipeline was built and put into use since, there is the risk against unconventional. Built at the turn of the last century, 7, and 80 a

Guarantees serves the long oil transfer air line security operation is realizes the pipeline energy conservation, the highly effective oil transfer key.Long loses the pipeline since to complete and the operational, can have the non-conventional harm the risk.But constructed at on century seven, the

Ensure the safety of long distance oil and gas pipeline in service operations is the key to realization of energy-saving, high performance oil pipeline. A pipeline is completed and put into use, non-conventional risks of harm. The pipeline built in the eighties of the last century has been late in l

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