NB/T 10218-2019Technical code for wind turbines foundation maintenance of offshore wind farm (English PDF)

Foreword

This standard is drafted in accordance with the rules given in "Guidelines for Standardization Work Part 1: Standard Structure and Compilation" (GB/T 1.1-2009).

Certain contents of this standard may involve patents. The issuing organization of this standard does not bear the responsibility for identifying these patents.

1 Scope

This standard specifies the basic procedures and technical requirements for the basic maintenance, inspection, inspection and operation of wind turbines in offshore wind farms. begging.

This standard is applicable to foundations such as single-pile foundations, jacket foundations, high-pile cap foundations, and gravity foundations for offshore wind farms. Type of maintenance work.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version is suitable Used in this document. For undated references, the latest version (including all amendments) applies to this document.

GB 5210 Coating adhesion determination method Pull open method

GB/T 9286 Cross-cut test of paint and varnish film

GB/T 13288.3 Steel surface treatment before coating, steel surface roughness characteristics after blast cleaning, part 3 Points. ISO surface roughness comparison specimen calibration and surface roughness measurement method microscope Focusing method

GB/T 13452.2 Determination of film thickness of paints and varnishes

JTJ/T 271 Port Engineering Concrete Bonding Repair Technical Specification

JTJ 275 Technical Code for Corrosion Prevention of Concrete Structures in Seaport Engineering

3 General

3.1 According to the characteristics of offshore wind farms, an outline for basic maintenance of wind turbines should be formulated. The outline should include inspections, inspections, Test, maintenance and emergency plan, etc.

3.2 Offshore wind farm operators should be proficient in offshore operation skills, familiar with the local marine environment and basic information about wind farms, Master the necessary marine hydrology knowledge and participate in various types of sea rescue exercises at least once a year. Have the corresponding qualifications.

3.3 Proper safety precautions should be taken for the basic maintenance of offshore wind turbines, and the relevant offshore wind farm safety should be observed. Provisions for the entire operation.

3.4 Labor protection equipment for offshore operations should be qualified and complete. Before going to sea, check whether the tools, equipment and spare parts you bring are Is it intact and complete.

3.5 The ship type, berthing speed, berthing method, berthing location and operating conditions of the offshore wind turbine operation and maintenance ship should meet Design regulations. The speed of the ship when navigating near the structure (50 meters) should not be greater than 1 kn.

3.6 Excavation and other operations that hinder the safety of the foundation shall not be carried out within 200 meters of the foundation of the wind turbine.

3.7 Offshore wind farms should establish basic maintenance files for wind turbines, which should include the following.

a) The foundation design, construction plan, construction record, inspection record, commissioning record, acceptance conclusion and Completion acceptance data;

b) Steel, concrete, anti-corrosion materials, grouting materials, anti-scouring facilities, measurement Relevant qualification certificates for measuring equipment and facilities;

c) Daily monitoring records;

d) Inspection records for patrol inspections, regular inspections and special inspections. The inspection records include wind turbine Check method, date, environmental conditions, abnormal location, phenomenon, degree, etc.;

e) Regular inspections, special inspection reports, analysis conclusions and handling opinions, basic maintenance data;

f) Abnormal marine meteorological and hydrological records such as typhoons, freezing, earthquakes, and tsunamis;

g) Related photos and video data;

h) Other materials that need to be archived.

4 Check

4.1 The inspection of the foundation of the wind turbine can be divided into three forms. patrol inspection, regular inspection and special inspection.

4.2 The inspection can be carried out by means of visual inspection, photography, measurement, online monitoring, etc.

4.3 The basic patrol inspection of the wind turbine generator should be combined with the maintenance of the equipment.

4.4 The basic patrol inspection cycle of wind turbine generator sets is 3 months-6 months. The inspection contents.

4.5 The period of regular inspection of the foundation of the wind turbine is 6-12 months. In addition to the inspection content, the inspection The following inspections should be included.

a) Whether the bollard and mooring ring are stable and intact;

b) Whether the J-tube is corroded or perforated;

c) Whether the anchoring device is in good condition;

d) When using sacrificial anodes for cathodic protection, check the sea mud surface elevation, anode size, and fixing conditions, and sacrificial anodes The underwater inspection should be determined according to its design life;

e) The shape and depth of scouring pits on the foundation and pipeline surface of the wind turbine.

4.6 When natural disasters such as typhoons, freezing, earthquakes, and tsunamis occur, or the foundation or platform is damaged by large ships or floating objects, etc.

Special inspection shall be carried out after the impact of sexual external force. The items and contents of the special inspection shall be determined according to the specific conditions.

4.7 After the inspection, the inspection record form should be filled out in time, and the damage scope, degree, and value changes should be used to determine whether Further detailed inspection and testing are required. See Appendix A for the inspection record form.

5 Detection

5.1 The basic testing of wind turbines can be divided into two forms. regular testing and special testing.

5.2 The main content of the basic regular inspection plan for wind turbine generators should include the inspection period, area, method, etc.

5.3 Testing should be done by professional and technical personnel. Testing equipment, instruments, and measuring tools should be verified or calibrated Period.

5.6 After the test, the test report should be filled in in time, and the measures and opinions should be put forward for the existing problems. Test report grid See Appendix C for the formula.

5.7 When it is found that the amount of test data is insufficient or the test data is abnormal, the test shall be supplemented in time.

5.8 Non-destructive testing should be used for on-site testing, and the test results should meet the design and standard requirements. If local sampling inspection is necessary The local damage caused by the inspection should be repaired in time, and the repaired structure or component should not be lower than the design requirements.

6 Maintenance

6.1 Before the maintenance work, the basic maintenance work instructions of the wind turbine generator should be compiled.

6.2 The maintenance of the foundation of offshore wind turbines should avoid affecting the safety of the infrastructure. For possible impact on structural safety The methods and methods of operation should be analyzed and evaluated.

6.3 The foundation of offshore wind turbine generator sets should be repaired in a dry environment and should meet the design requirements.

6.4 Facilities used for basic maintenance operations should not cause damage or damage to the foundation during installation and dismantling, and should be dealt with after dismantling Check the demolition site.

6.5 When the berthing and protective facilities are loose or damaged, they should be fastened, repaired or replaced in time, and the paint should be painted or repainted regularly.

6.6 During the maintenance of the coating, the exposure time before the coating is cut off or the damage is repaired should be shortened as much as possible.

6.7 A file card shall be established for the anti-corrosion coating system, including the completion data of the coating and the inspection and maintenance of the coating application process. Repair records, etc.

6.8 The on-site repair of steel structure anticorrosive coating shall meet the following requirements.

a) The surface cleaning of the damaged part of the coating should be powered or manually derusted, and the surface cleanliness level should reach St3;

b) The coating surface of the overlapping part should be free of pollution and attachments, and should have a certain surface roughness to meet GB/T 13288.3 requirements;

c) The paint used for repair should be the same as the original paint;

d) The detection of coating film thickness shall be implemented in accordance with GB/T 13452.2;

e) Coating system adhesion and cohesion tests are carried out according to GB/T 5210 and GB/T 9286.

6.9 The on-site repair of the anticorrosive coating of concrete structures shall meet the following requirements.

a) When painting or coating is damaged, repair it in time. The repair paint should be the same or compatible with the original paint;

b) The surface of the concrete should be treated before painting, so that the treated concrete surface is free of exposed stones, honeycombs, debris, oil, Dust and loose attachments, etc.;

c) The coating method should be selected according to the physical properties of the coating, construction conditions, coating requirements and the structure of the coating;

d) The impregnation of silane on the concrete surface shall be carried out in accordance with JTJ 275.

6.10 The repair of concrete defects shall meet the following requirements.

a) The repair of shallow concrete defects should include concrete members whose damage depth does not exceed the protective layer of steel repair;

b) Concrete structures with cracks greater than the thickness of the protective layer should be repaired by grouting;

c) For concrete structural members that are subjected to static force in bending, compression and tension, when reinforcement is required, externally bonded steel should be used Reinforcement method

d) The concrete repair in the splash area and tidal range area should be made of materials with short solidification time, high early strength and excellent performance.

Use special mortar, special concrete, accelerator, polymer mortar, epoxy mortar, special cyanide mortar, etc.;

e) Repair construction requirements shall be implemented in accordance with JTJ/T 271.

Appendix A (Informative appendix)

Basic inspection record sheet for offshore wind turbines Table A.1 Basic inspection record of offshore wind turbines