Wide application of steam led to the first industrial revolution and the steam has never been out of the industrial production field after entering the electric age. Heavy-duty machinery enterprise, electronic instrument company, textile dyeing and printing enterprise, food processing enterprise and all kinds of industrial manufacturing industries involve production process requiring the use of steam all the time. Steam are generated by their own boiler or transported from thermal power plant. Steam is transported from the steam source to operating station through the pre-insulated heating piping system, which features low temperature, low pressure and high concentration on the using effect of pipeline. Such pipelines are usually laid inside the factory, of small work amount but complicated and overloaded workload, plus high requirements on the coordinate organization of participants involved.