Detail of DL 5190.3-2012

Introduction of DL 5190.3-2012

1 General Provisions 1.0.1 The standard DL 5011-1992 "Technical Code of Construction and Acceptance for Electric Erection" is revised partially to strengthen the technical management in the engineering construction of steam turbine generator unit and further improve the engineering quality. 1.0.2 This part is applicable to construction of steam turbine generator unit in thermal power plant, gas-steam steam turbine generator unit, steam turbine generator unit in nuclear power station, auxiliary equipment and accessory machinery. 1.0.3 The construction of steam turbine generator unit shall be based on the approved design and the technical documents of the equipment manufacturer; if the above is modified or changed, the design organization and equipment manufacturer shall issue the appropriate documentation and make some related approval procedure. The civil works of the power plant shall meet the requirements of this specification "Technical Specification for Thermal Power Erection and Construction Part 1: Civil Works"; as for the specific requirements, the relevant requirements of this part shall be complied with. 1.0.4 The construction of steam turbine generator unit shall be in accordance with the order contract for equipment, technical agreement and valid technical document of the manufacturer; this part shall prevail if there is no specific requirement or complete requirements in the contractual agreement and documents of the manufacturer. 10.5 Construction of steam turbine generator unit shall not only comply with this part but the national and professional current relevant standards. 2 Terms 2.0.1 Ellipticity The out-of-roundness of cylindrical axis or hole at some cross section, equal to the difference between the maximum diameter and the minimum diameter on this cross section. 2.0.2 Non-cylindricity The deviation of cylindrical axis or hole from the parallel line through the upper and lower lines of axial section for the center line of the axis. The value is the difference between the maximum diameter and the minimum diameter on the axial section. It is required to be a right cylinder parts and the non-cylindricity is the deflection degree from that required by the right cylinder. 2.0.3 Taper The tilt degree of conic and truncated cone shaped rotative surface from the datum plane. As for the conic one, the value is the ratio of diameter of cone datum plane to the cone height; as for the truncated cone shaped one, the value is the ratio of difference of upper and lower diameters to the truncated cone height. 2.0.4 Tilt/tilt (gradient) The tilt degree of the straight or plane if it is intersected with the datum line or datum plane. The value is the ratio of the minimum distance between the plane or straight and the datum plane or line within the given datum plane or line length to their given lengths. 2.0.5 Flatness The extent to which the actual surface deviates from the standard plane. The value is the distance of the physical plane from the farthest point of the standard plane. 2.0.6 Non-parallelism The unparallel degree between two parallel lines or planes. The value is the difference between the maximum and minimum vertical distances for either. 2.0.7 Non-perpendicularity The difference between the angles formed by two axes, axis and plane or two planes and the standard right angle, expressed by the minimum distance △ from the standard vertical line or plane within the unit length from the measured line or plane, in △/m. 2.0.8 Radial run out The extent to which the shaft surface where the measuring section is located deviates from the center line of the shaft. Use the dial indicator to point at the center line of the axis of the measured section vertically with the rotor journal turning on the supporting surface; the difference between the maximum and minimum reading at all point on the measured surface is the radial run out of journal on this section. 2.0.9 Ending run out The non-perpendicularity degree of the ending and the center line of the shaft. A dial indicator perpendicular to the ending is respectively placed at two positions into a 180° angle at the surroundings of the tested ending close to the diameter, turn the rotor, the difference between the maximum difference indicated by the two indicators and the 1/2 of minimum difference is the ending run out value. 2.0.10 Large pumps High pressure centrifugal pump with nominal diameter at outlet greater than 400mm and that at the inlet greater than 700mm. 2.0.11 High-speed pumps Pumps with rated speed higher than 1500r/min. 2.0.12 Adjustable steam seal The steam seal to close by segment with the increase of steam pressure in the starting. Its main features: in the starting, the steam seal blocks open to reach the largest clearance between the dynamic and static parts so that the impact and rubbing are avoided in the starting due to the vibration and the deformation. With the speedup and loadup of the unit, the steam seal block closes at the end to reduce the clearance between the dynamic and static parts, finally reducing the steam leakage amount of steam seal and improving the efficiency of the unit. 2.0.13 Air-cooled condenser (ACC) The surface heat exchanger using the air as the cooling medium to make condense the turbine exhaust into water, ACC for short. 2.0.14 Relative vibration The measured value of radial displacement between rotating axis and corresponding structure (e.g. bearing block or housing), unless otherwise specified in this part, the "axis vibration" refers to the relative vibration. 2.0.15 Absolute vibration The measured value of displacement of rotating axis relative to some inertial reference system. 2.0.16 Run back test The process in which the testing control system reduces the unit loads to the actual output rapidly and controls the continued operation capability within allowable parameter range if some main auxiliary machinery fails and stop and the maximum output of the unit is less than the given load.

Contents of DL 5190.3-2012

Foreword I 1 General Provisions 2 Terms 3 Basic Requirements 3.1 Equipment Unpacking and Storage 3.2 Civil Works 3.3 Equipment and System Erection 4 Steam Turbine 4.1 General Requirements 4.2 Requirements for Foundation 4.3 Soleplate and Shims 4.4 Casing, Bearing Pedestals and Sliding Key System 4.5 Bearing and Oil Baffle 4.6 Steam Turbine Rotor 4.7 Installation of Equipment in Flow Passage 4.8 Turning Gear and Speed Reducer 4.9 Covering of Steam Turbines 4.10 Secondary Grouting and Curing 4.11 Project Documents to be Provided for Quality Acceptance 5 Generator and Excitation Device 5.1 General Requirements 5.2 Bearing Seat and Bearing 5.3 Stator 5.4 Generator Rotor 5.5 Stator Position Adjustment and Cover Closing 5.6 Shaft Sealing and Gas Cooling System of Hydrogen-Cooled and Water-Hydrogen-Hydrogen-Cooled Generator 5.7 Water Inlet/Outlet Pedestals and Cooler 5.8 Cooling Water System 5.9 Excitation Device 5.10 Project Documents to be Provided for Quality Acceptance 6 Control-protecting Device and Oil System 6.1 General Requirements 6.2 Electro-hydraulic Control and Protecting Device 6.3 Hydraulic Control and Protecting Device 6.4 Steam Valve and Its Driving Device 6.5 Centrifugal Main Oil Pump 6.6 Control Oil System 6.7 Lubricating Oil System 6.8 Sealing Oil System of Hydrogen-cooled Generators 6.9 Project Documents to Be Provided Before Quality Acceptance 7 Piping of Steam Turbine 7.1 General Requirement 7.2 Valves and Special Parts 7.3 Installation of Piping 7.4 Project Documents to Be Provided for Quality Acceptance 8 Auxiliary Equipments 8.1 General Requirement 8.2 Condenser 8.3 Air Cooling Equipment 8.4 Extraction Equipment 8.5 Heat Exchangers 8.6 Tanks and Deaerator 8.7 Attemperator and Pressure Reducing Device 8.8 Project Documents to Be Provided before Quality Acceptance 9 Accessory Machinery 9.1 General Requirement 9.2 Installation of Accessory Machinery 9.3 Common Centrifugal Pump 9.4 Feed Water Pump Units and Their Associated Devices 9.5 Vertical Pumps 9.6 Deep Well Pumps 9.7 Air Cooling and Water Cooling Fans 9.8 Rotating Filter Screen 9.9 Project Documents to be Provided before Quality Acceptance 10 Bridge Crane, Casing Insulation and Enclosure 10.1 Bridge Crane 10.2 Insulation and Painting of Steam Turbine Equipments 10.3 Enclosure, Platform, Ladder and Cover of Steam Turbine 10.4 Project Documents to be Provided before Quality Acceptance 11 Regulation, Start-up and Trial Run of Turbogenerators 11.1 General Requirement 11.2 Trial Run of Accessory Machinery 11.3 Purging and Flushing of Steam-water Pipelines 11.4 Leakage Check of Steam Turbine Vacuum System 11.5 Trial Run of Steam Turbine Auxiliary Equipment 11.6 Trial Run of Oil System and Oil Flushing 11.7 General Provisions for Entire System Start-up and Trial Run 11.8 Adjustment and Testing of the Control System and Automatic Protective Devices Prior to Start-up of Steam Turbine 11.9 Start-up and No-load Trial Run of Turbogenerators 11.10 Hydrogen Filling of Generator and Operation of Hydrogen System 11.11 Trial Run of Double Water-internally Cooled Generator and Water-hydrogen-hydrogen-cooled Generator 11.12 Hot Flushing of Air Cooling System 11.13 Trial Run of Turbo-generator with Load 11.14 Project Documents to be Provided before Quality Acceptance Appendix A Requirements for Construction of Mortar and Pads for S/T Soleplate Appendix B Mix Proportion for Cylinder Coating Appendix C Common Sealing Material Types and Scope of Application Appendix D Common Grease Types and Scope of Application Appendix E Physical Performance of Common S/T Bolting Materials Appendix F Sag Calculation Formula for Centering with Steel Wire Appendix G Standard for Leakage Test of Generator Hydrogen System Appendix H Unit Vibration Criterion Appendix J Oil Quality Rating Criterion Explanation of Wording in this Specification Normative Standards