发电厂管道、容器的检修（Maintenance of power plant pipeline and container）.docVIP

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发电厂管道、容器的检修（Maintenance of power plant pipeline and container）.doc

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发电厂管道、容器的检修（Maintenance of power plant pipeline and container）

发电厂管道、容器的检修（Maintenance of power plant pipeline and container） 11 piping and vessel maintenance 11.1 general considerations 11.1.1 work shall be done for the overhaul of the penstock, the container and the underground maintenance room. Staff should be familiar with the system connection and the use of valves and accessories and methods of inspection and repair. 11.1.2 in license maintenance, operator shall make all necessary switching work, to the relevant piping, inside the container of gas and water, oil or gas, ensure the container pipe, container, maintenance work area and other safety partition. The valves shall be locked and hung. No closing, someone working.! Sign board. For power operated valves, power shall be cut off and safety signs shall be hung. 11.1.3 before starting the work, who should be responsible for the maintenance work in conjunction with the permit to work together to check, confirm the pipes, containers, the need of maintenance work area has reliable operation of the equipment and the partition, no steam, water, oil or gas flows may. Before the maintenance of the 11.1.4 pipeline, the drain door shall be opened to prevent the leakage of water or steam when the valve is not tight enough to accumulate in the pipeline. If there is no flange pipe maintenance and overhaul to use gas cutting or welding method, should open the pipe on the drain valve; when necessary, should also be carefully and slowly release the flange hydrophobic door, has confirmed the internal pressure or water, can be carried out cutting or welding work. 11.1.5 repair work is completed, the maintenance work in conjunction with the operator who should be responsible for the inspection work has been completed, with the blocking plate has been removed, the pipe has returned to normal, the workplace has been cleared, all staff have left, and then remove the warning signs and chains. When removing the blocking plate, the steam and water accumulated on the other side of the blocking