1.0.1 This standard is developed with view to implementing the national basic policies on construction in electric power construction, reflecting the national economic policies, promoting regional cooperation in overhaul of power device, and improving the utilization and production efficiencies of maintenance device, the benefits and management level of power plant.
1.0.2 This standard is applicable to the newly-built coal-fired power plants with 2~6 units of 50~600MW capacity installed.
For extended power plants, the maintenance workshop area shall be furnished comprehensively considering this standard and the realities of the existing plant.
1.0.3 For gas-fired and oil-fired power plants, the devices under consideration to be furnished may be appropriately increased or decreased by reference to this standard.
1.0.4 This standard can play as the basis for maintenance device selection in fossil fuel power plant engineering and for engineering budget review by competent departments.
2 Classification of Maintenance Production Task
2.0.1 The maintenance production tasks of fossil fuel power plant may be classified into three classes:
Class I: Where there are good conditions for regional cooperation, the processing of both large and medium-sized parts and accessories can be outsourced, and the maintenance production tasks of the plant mainly are to address the maintenance of common parts and accessories in routine maintenance and to process common spares.
Class II: For the power plants located in remote areas where there are no regional cooperation conditions for machining, the parts and accessories to be processed for major and minor overhauls can be undertaken by the plant itself.
Class III: Major and minor overhauls can be consigned or bidding-based outsourced. The fossil fuel power plants by which the purchasing and processing of spares and accessories are entrusted to affiliated company shall not be arranged with workshop.
2.0.2 The class of maintenance production task of fossil fuel power plant shall be defined at preliminary design stage by competent grid (provincial) administration or by the investor (owner) and be determined through design review.
3 Scale of and Furnishing Device to Maintenance Workshop
3.0.1 The scales of and device to be furnished to maintenance workshop of fossil fuel power plants may be classified by unit capacity into three levels—100MW or below, 300 MW or below, 600 MW or above.
3.0.2 Newly-built power plants, regardless of the units installed at the current phase, are uniformly equipped with 2 sets of standard maintenance device and are generally arranged with one maintenance workshop.
3.0.3 Maintenance devices, in principle, shall be so furnished that no frame planer or vertical lathe (surfacing lathe) is arranged (power plants with fan mill may be arranged with one set of vertical lathe). Power plants in remote areas which are of poor local cooperation conditions may be arranged with one set of vertical lathe or lightweight frame planer.
