JB/T 6505-1992 General process regulations for rust prevention of steam turbines
Some standard content:
K54 | | tt | | JB | ||1993-05-01
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Theme content and scope of application
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JB/T65051992
JB/Z16481||tt| |This standard specifies the general processes for steam turbine manufacturing processes, intermediate inventory, assembly process, and finished product storage and rust prevention. This standard applies to steam turbines.
2 Reference standards
JB/T2901
SY1373
SY1374
SY1575
SY1576
3 Basic requirements|| tt||Technical conditions for steam turbine rust prevention
Vulcanized cutting oil
Emulsified oil
Petroleum grease type anti-rust grease
Replacement type anti-rust oil
3.1 During the manufacturing process of steam turbines, factories should do rust prevention work in accordance with JB/T2901 regulations, combined with the climate characteristics of the region and specific production practices, and refer to the process procedures recommended by this standard. 3.2 The anti-rust materials used in the factory must comply with the technical requirements for anti-rust materials in JB/T2901. 4 Anti-rust between processes
4.1 Anti-rust between processes is the basis of anti-rust work for finished products. To do a good job in anti-rust between processes, you must first select the cutting fluid and pre-cut oil according to the standard requirements, and use them during use Regular inspection and replacement are required, and the use of deteriorated cutting fluid and cutting oil is prohibited. 4.1.1 Pre-cutting fluid
The emulsified oil currently suitable for steam turbine processing is No. 1 and No. 2 emulsified oil in SY1374. Among them, No. 1 emulsified oil has better anti-rust performance and is suitable for general turning, milling, Used for lubrication and cooling in planing, drilling and other processing. Recommended products include No. 1 metal emulsified cutting fluid, 76-2 anti-rust emulsified oil, 73-8 emulsified oil, G-3 synthetic cutting fluid, 852 water-fat cutting fluid, etc. No. 2 emulsified oil has better cleaning performance, is suitable for grinding processing, and has certain anti-rust properties. The products include 69-1 emulsified cutting oil, H-1 fine grinding oil, NL anti-rust emulsified oil, and 76-3 anti-rust emulsified oil. Oil etc. 4.1.2 Cutting oil
The cutting oils currently suitable for steam turbine processing are vulcanized cutting oil, extreme pressure cutting oil and anti-rust cutting oil. The recommended products are F-43 anti-rust cutting oil and F68-4 cutting oil. wait.
4.2 During the finishing process of parts, if anti-rust cutting fluid or cutting oil is used, the residence time generally exceeds 1 day; when anti-rust cutting fluid or cutting oil is not used, the residence time exceeds 4 hours, the finishing surface must be When using vulcanized cutting oil for anti-rust treatment, the parts must be cleaned in time and anti-rust measures must be taken.
If the stay time does not exceed two months, you can use No. 4 anti-rust oil products in SY1576 (such as F-23, 661, etc.). If the stay time exceeds two months, handle it according to the intermediate inventory anti-rust measures. Note: 1) The stay time can be changed appropriately according to the specific conditions of each region. 4.3 The surface of the parts that will not be processed after heat treatment must be cleaned of residual salt and oil and subjected to anti-rust treatment. 4.4 After the parts undergo the hydrostatic test, their finished surfaces should be cleaned immediately, dried and then subjected to anti-rust treatment. 1992-12-21
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1993-05-01
5 Intermediate inventory rust prevention
JB/T65051992
5.1 Parts must be stored before storage Check the rust condition. Rusty parts must be removed and can only be delivered to the warehouse after passing the inspection. 5.2 The parts entering storage must be cleaned, and different anti-rust materials should be used for anti-rust treatment according to the storage period. 5.2.1 For parts whose inventory period does not exceed half a year, No. 3 anti-rust oil in SY1576 can be used. Products include 201, 204-901 anti-rust oil, No. 2 soft film, No. 7 hard film anti-rust oil, etc.
5.2.2 For parts with an inventory period of more than half a year, No. 1 anti-rust grease or dural anti-rust oil in SY1575 can be used. The products include 907, 663 anti-rust grease special seal-24 anti-rust oil and 74- 2Dural anti-rust oil, etc. 5.3 Regularly check the rust prevention of parts in stock, and deal with them promptly if rust is found. Parts that have exceeded the rust-proof guarantee period must be re-rust-proof.
6 Anti-rust during assembly
6.1 All assembled parts should be rust-free. Rusted parts should be removed and inspected before assembly can be carried out. 6.2 During assembly, the parts should be cleaned, and then coated with turbine oil or anti-rust turbine oil to ensure assembly with oil. This can not only ensure the lubrication of the parts, but also isolate hand sweat.
6.3 The test run or test part cover shall be disassembled again after the test run or test, cleaned, and treated as a finished product for anti-rust sealing. For parts that cannot be disassembled after adjustment and positioning, anti-rust turbine oil (turbine oil with rust inhibitor added) or extreme pressure anti-rust turbine oil should be used during commissioning or testing. After the commissioning or testing is completed, all the stored oil should be drained. remove, and then inject an appropriate amount of the above-mentioned anti-rust turbine oil. 6.4 When spraying steam turbine parts, all processed surfaces, electroplated parts, nameplates, hair blue parts, etc. should be protected and covered and sealed with paper or anti-rust grease to prevent mist contamination. If contaminated, they should be cleaned and sealed. Carry out anti-rust treatment. 7 Finished product storage and anti-rust
7.1 Parts and components must be strictly inspected for corrosion before being sealed. If there is no rust, they must be cleaned and sealed immediately for anti-rust. 7.2 Anti-rust materials should be selected according to the characteristics of the parts. 7.2.1 Rotor
7.2.1.1 Coat the journal part of the rotor with No. 1 anti-rust grease in SY1575 or other anti-rust grease. The following anti-rust measures are recommended.
a. Cleaning
Clean with kerosene for the first time and dry with fine cotton. Add 5% to 10% replacement anti-rust oil to kerosene for the second cleaning, and wipe clean with fine cotton (operate with gloves). b. Inspection
Inspect under sufficient light conditions, there is no visible dirt, rust, oil, hand sweat and moisture. c. Oiling
After cleaning and drying, immediately apply No. 1 anti-rust grease or other anti-rust grease and apply it twice. d. After the oil film dries, tightly wrap two layers of sodium benzoate anti-rust paper or vapor phase anti-rust paper (must be anti-rust paper with anti-rust agent on both sides). Tightly wrap two layers of polyethylene plastic film and tie tightly with plastic tape. e.
Insert the end of the polyethylene plastic bag for external use and tie it tightly, then add anti-rust agent or desiccant. f.
g. Use lead plates or other suitable materials to place upper and lower pads on the bracket at the journal position. 7.2.1.2 The coupling and the adjusting sleeve connected to the rotor are coated with No. 1 anti-rust grease or other anti-rust oil, and then sealed with a layer of sodium benzoate anti-rust paper or neutral paraffin paper.
7.2.1.3 The impeller, blades, steam seal part and other parts of the rotor are coated with anti-rust grease or sprayed with aluminum powder paint. 7.2.2 All processed surfaces of the cylinder cavity, bearings, bearing seats, partitions, partition sleeves, seats, etc. are coated with No. 1 anti-rust grease. In addition to applying anti-rust grease on each surface, use sodium benzoate anti-rust paper or Seal with neutral paraffin paper. 2 | | tt | | JB/T65051992 | 201 anti-rust oil or other anti-rust and lubricating oils.
7.2.4 The inner wall of the bearing box and the internal threads on the cylinder must be strictly cleaned and then coated with anti-rust oil (the inner wall of the bearing box can also be painted with anti-rust paint or other anti-rust measures are used).
7.2.5 Apply No. 1 anti-rust grease and hard film anti-rust oil to the flanges of the heater, condenser, air extractor, oil cooler, oil tank and other parts, and connect the tubes at both ends of the condenser The tube sheet should be coated with No. 3 anti-rust oil and sealed with sodium benzoate anti-rust paper or neutral paraffin paper. The loose flange should be blocked with plastic board or fiber board.
7.26 No. 3 anti-rust oil can be applied inside containers (heaters, oil coolers, air extractors) and pipes. Add a plug to the micro-opening, and use gas-phase rust inhibitor or nitrogen filling if possible. The loose opening must be sealed. 7.2.7 Unassembled hair parts, electroplated parts, nameplates and random tools should be coated with No. 3 anti-rust oil or No. 1 anti-rust grease. 7.2.8 Cylinder studs, flange studs, pipe joints and other parts should be coated with No. 1 anti-rust grease or No. 3 anti-rust oil. The threaded parts should be covered with vinyl plastic protective sleeves and neutral paraffin paper or sodium benzoate anti-rust paper. Protective case for packaging. 7.2.9 Precision spare parts should be coated with No. 1 anti-rust grease, then packaged in sodium benzoate anti-rust paper, and sealed with polyethylene plastic bags. Small units that are completely shipped from the factory are not included, and the storage of their finished products can be determined according to specific circumstances. 8 Anti-rust detection operation process
8.1 If rust is found on parts during processing, inventory, and assembly, if the use is not affected after rust removal, mechanical rust removal or chemical rust removal can be selected according to the specific conditions of the parts. The parts after rust removal must be treated with rust prevention. Avoid further corrosion. 8.1.1 Mechanical rust removal is suitable for small batches, single pieces, and heavy parts. Generally, scrapers, wire brushes, emery cloth, sandpaper, abrasive paste, etc. are used to remove rust. After the rust is removed, wash it with kerosene. 8.1.2. Chemical rust removal is suitable for rust removal of small and medium-sized parts produced in large quantities. 8.2 General parts contain varying degrees of dirt, oil, sweat and other corrosive media. Therefore cleaning is necessary. Cleaned parts must not be touched directly with hands. To avoid corrosion caused by sweat. 8.2.1 General parts should be washed roughly and finely with kerosene or solvent gasoline for lamps (automobile gasoline is corrosive and cannot be used). 5% No. 3 anti-rust oil should be added to the kerosene or gasoline used for fine cleaning. 8.2.2 The residual salt and residual oil of parts after heat treatment must be cleaned. 8.2.3 After pickling, the residual acid must be neutralized and cleaned. 8.3 After the parts are cleaned, dry or wipe the cleaning liquid before rust prevention. The rust prevention method should be based on the anti-rust materials and Anti-rust tools are selected. 8.3.1 Spraying: Dilute No. 1 anti-rust grease or No. 3 anti-rust oil with solvent gasoline to a suitable consistency, and then spray with high-pressure air or purified compressed air. This method is suitable for general exposed surfaces and internal surfaces. Anti-rust. 8.3.2 Brush coating; No. 1 anti-rust grease or No. 3 anti-rust oil can be applied directly. This method is suitable for exposed oil seals. 8.3.3 Dip coating: Dip the parts into No. 1 anti-rust grease or No. 3 anti-rust oil. It can be taken out in about 1 minute. This method is generally used for spare parts and small parts.
8.4 Apply anti-rust oil and let it dry for 6 hours. Apply anti-rust grease and wait until it solidifies before packaging. The parts after sealing must be protected and their anti-rust oil and grease coatings must not be damaged and must not be left in the open air. Additional notes:
This standard is proposed and administered by the Shanghai Power Generation Equipment Complete Design Institute of the Ministry of Mechanical and Electronic Industry. This standard was drafted with the financial support of Harbin Steam Turbine Factory, Beijing Heavy Electric Machinery Factory and Nanjing Steam Turbine Motor Factory. 3
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