Scheme 1: Anti-corrosion construction scheme of steel structure
1. Anti-corrosion measures for steel structures
(1) Weathering steel: Steel with better corrosion resistance than general structural steel is called weathering steel, which generally contains metals such as phosphorus, copper, nickel, chromium and titanium, thus forming a protective layer on the metal surface and improving corrosion resistance. Its low temperature impact toughness is also better than that of general structural steel. The standard is Weathering Steel for Welded Structures (GB4 172-84).
(2) Hot-dip galvanizing: Hot-dip galvanizing is to immerse the derusted steel members in high-temperature molten zinc at about 600℃, so that a zinc layer is attached to the surface of the steel members. The thickness of zinc layer of thin plate below 5 mm shall not be less than 65 microns, and that of thick plate shall not be less than 86 microns. So as to achieve the purpose of anticorrosion. The advantages of this method are good durability, high degree of industrialization and stable quality. Therefore, it is widely used in outdoor steel structures with serious atmospheric corrosion and difficult maintenance. Such as a large number of transmission towers and communication towers. In recent years, a large number of profiled steel plates have appeared in the light steel structure system. Hot dip zinc is also widely used to prevent corrosion. The first process of hot dip galvanizing is pickling and derusting, and then cleaning. The incompleteness of these two processes will leave hidden dangers for anticorrosion. So it must be dealt with thoroughly. For steel structure designers, it is necessary to avoid designing components with joint surfaces, so as to avoid incomplete pickling or unclean pickling of joint surfaces. Causing yellow water to flow on the galvanized surface. Hot dip galvanizing is carried out at high temperature. For tubular members, both ends should be open. If both ends are closed, the air in the pipe will expand and the head plate will burst, which will cause safety accidents. If one end is closed, the circulation of zinc liquid is not smooth and it is easy to accumulate in the tube.
(3) Hot spraying aluminum (zinc) composite coating: this is a long-term anti-corrosion method equivalent to the anti-corrosion effect of hot dip zinc. The specific method is to first carry out sand blasting and rust removal on the surface of steel members to expose metallic luster and roughen the surface. The continuously sent aluminum (zinc) wire is melted by the heat source (acetylene-oxygen combustion flame, electric arc, plasma arc, etc.) of thermal spraying equipment. ), and compressed air is blown to the surface of the steel member to form a honeycomb aluminum (zinc) spray coating (thickness is about 80μm~ 100μm). Finally, epoxy resin or neoprene coating is used to fill the pores to form a composite coating. This method cannot be used to construct the inner wall of the tubular member, so both ends of the tubular member must be sealed to prevent the inner wall from corrosion. The advantage of this process is that it has strong adaptability to the size of components, and the shape and size of components are almost unlimited. A ship lock as big as Gezhouba was built in this way. Another advantage is that the thermal influence of this process is local and constrained, so thermal deformation will not occur. Compared with hot dip galvanizing, this method is less industrialized and the labor intensity of sandblasting aluminum (zinc) is greater.
(4) Painting method: The corrosion resistance of painting method is generally not as good as that of long-term anti-corrosion method (but the corrosion resistance of fluorocarbon coatings can even reach 50 years at present). So there are many indoor steel structures or outdoor steel structures that are relatively easy to maintain. The one-time cost is low, but the maintenance cost is high when used outdoors. The first step of painting construction is derusting. A good coating depends on thorough rust removal. Therefore, the demanding painting generally adopts sand blasting and shot blasting to remove rust, exposing metallic luster and removing all rust and oil stains. The paint used for site construction can be derusted by hand. The selection of coatings should consider the surrounding environment. Different coatings have different tolerance to different corrosion conditions. Coatings are generally divided into primer (layer) and topcoat (layer). Primer contains more powder and less base material. Rough film formation, strong adhesion to steel and good adhesion to topcoat. The topcoat has a lot of base materials, and the film is shiny, which can protect the primer from atmospheric corrosion and has good weather resistance. There is a compatibility problem between different paints, so we should pay attention to their compatibility when choosing different paints before and after. Coating construction should have proper temperature (5~38℃) and humidity (relative humidity is not more than 85%). There should be little dust in the construction environment of paint, and there should be no condensation on the surface of components. Don't get wet in the rain within 4 hours after painting. Coating is usually done 4~5 times. The total thickness of dry paint film for outdoor engineering is 150μm, and that for indoor engineering is 125 μm, with an allowable deviation of 25μ m. In seaside, sea or strongly corrosive environment, the total thickness of dry paint film can be thickened to 200~220μm m..
(5) Cathodic protection method: more active metals are attached to the surface of steel structure to replace the corrosion of steel. Usually used in underwater or underground structures.
2. Key points of steel structure installation
(1) friction coefficient: where f is the force that causes the initial slip of the specimen measured in the anti-slip test, nf is the number of friction surfaces, and it is the sum of the measured pre-tension values of the high-strength bolts corresponding to f. ..
(2) Torque coefficient: where d is the nominal diameter (mm) of the high-strength bolt, m is the applied torque value (n ~ m), and p is the pre-tightening force of the bolt. 10.9 grade high-strength hexagon bolt connection, the average torque coefficient k must be 0.110 ~ 0.150. Its standard deviation should be less than or equal to 0.0 10.
(3) Initial tightening torque: In order to reduce the influence of steel plate deformation when bolts are tightened, secondary tightening can be adopted to reduce the mutual influence between successively tightened bolts. The first tightening of high-strength bolts is the initial tightening, so that its axial force reaches 60% ~ 80% of the standard axial force.
(4) Final screwing torque: The final screwing torque of high-strength bolts is final screwing torque. Considering all kinds of prestress losses, the final torsional moment is generally 5% ~ 10% greater than that calculated according to the design pretension theory.
3. Steel structure acceptance
(1) Warranty items: Warranty items are important inspection items to ensure engineering safety or use function. Whether the quality rating is qualified or excellent, it must meet the requirements of the specified indicators. For different subdivisional works, GB502 1-95 clearly stipulates the contents of warranty items, which only require satisfaction, and there is no distinction between excellent and qualified.
(2) Basic items: Basic items are basic inspection items to ensure the safety or use function of the project, and their indicators are divided into "qualified" and "excellent", which is one of the conditions for evaluating the quality grade of sub-projects
(3) Allowable deviation items: Allowable deviation items refer to items within the allowable deviation range specified in the measured inspection of sectional works. During inspection and evaluation, the measured values of a few sampling points are allowed to slightly exceed the allowable deviation range.
(4) Evaluation of visual quality: The visual quality should be evaluated by three or more people. Inspection items and standards for steel structure processing and installation are as follows. When evaluating the visual quality, each item will be scored as 10, and will be graded according to the qualified rate. For standards, please refer to the table of visual quality evaluation standards.
Knowledge of surface treatment before painting
In the process of processing, transportation and storage, the surface of workpiece often contains scale, molding sand left by rust mold, welding slag, dust, oil pollution and other dirt. In order to make the deep layer firmly adhere to the surface of the workpiece, the surface of the workpiece must be cleaned before painting, otherwise it will not only affect the bonding force and corrosion resistance between the coating and the base metal, but also make the base metal continue to corrode even with the protection of the coating, so that the coating will peel off and affect the mechanical properties and service life of the workpiece. Therefore, the surface treatment of workpiece before painting is an important guarantee and measure to obtain excellent protective layer and prolong the service life of products.
In order to provide a good workpiece surface, the surface treatment of the workpiece before painting is as follows:
1. No oil and moisture.
2. No rust and oxide
3. No sticky impurities
4. No residue such as acid and alkali.
5. The surface of the workpiece has certain roughness.
Commonly used surface treatment methods are:
Manual treatment: such as scraper, wire brush or grinding wheel. Rust and scale on the surface of workpiece can be removed by hand, but manual treatment is labor intensive, low in production efficiency, poor in quality and incomplete in cleaning.
Chemical treatment: mainly uses acid or alkaline solution to react with oxide and oil stain on the surface of workpiece, and dissolves it in acid or alkaline solution, thus achieving the purpose of removing rust, scale and oil stain on the surface of workpiece. Chemical treatment is suitable for cleaning thin plate parts, but the disadvantage is that if the time is not properly controlled, even if corrosion inhibitor is added, it will corrode steel. For parts with complicated structures and parts with holes, it is difficult to completely remove the residual acid immersed in gaps or holes after pickling with acidic solution. If it is not handled properly, it will become a hidden danger of future corrosion of the workpiece, and the chemicals are volatile and costly, so it is difficult to discharge the treated chemicals. If it is not handled properly, it will cause serious pollution to the environment. With the improvement of people's environmental awareness, this treatment method is being replaced by mechanical treatment.
Mechanical treatment: mainly including shot blasting and shot blasting. Shot blasting cleaning is a method of using centrifugal force to accelerate the projectile and throw it at the workpiece for derusting and cleaning. However, the flexibility of shot blasting is poor, and due to the limitation of the site, there is a certain blindness in cleaning the workpiece, which is easy to produce a dead angle on the inner surface of the workpiece that cannot be cleaned. The equipment structure is complex, and there are many wearing parts, especially the parts such as blades, which wear quickly, have many maintenance hours, high cost and large one-time investment.
Shot peening is divided into shot peening and sand blasting. The surface treatment of shot blasting has great impact and obvious cleaning effect. However, shot peening is easy to deform the thin plate workpiece, and the steel shot hits the surface of the workpiece (whether shot peening or shot peening) to deform the metal matrix. Because Fe3o4 and Fe2o3 are not plastic, they peel off after crushing, and the oil film deforms with the matrix, so shot peening and shot peening can't completely remove the oil on the greasy workpiece. Among the existing surface treatment methods of workpieces, sandblasting is the best cleaning effect. Sand blasting is suitable for cleaning the surface of workpieces with high requirements. However, at present, the general sandblasting equipment in China is mostly composed of original heavy sand conveying machinery such as hinges, scrapers and bucket elevators. Users need to build a deep pit and make a waterproof layer to install machinery. The construction cost is high, the maintenance workload and cost are extremely high, and a large amount of silica dust generated in the sand blasting process cannot be removed, which seriously affects the health of operators and pollutes the environment.
With the continuous progress of science and technology, with people's constant requirements for product quality, with the continuous application of high-tech equipment in enterprises, with the improvement of people's environmental awareness and the strict requirements of environmental protection departments, it is urgent to control dust pollution and noise environment. The competition among enterprises is becoming more and more fierce, and how to gain an advantage in the fierce competition has become the key to the development of enterprises. Facts tell us that strict control of production links is the premise of ensuring the quality of enterprise products, and it is everyone's responsibility to control environmental pollution.
Scheme 2: Anti-corrosion construction scheme for new steel structure
First, planning standards.
1) is formulated with reference to the requirements of national standards for high-stage closure: the primer and topcoat used outside the construction of responsible painting steel structure do not meet the relevant requirements of the state for the construction of anticorrosive primer and topcoat for steel structure engineering, and all the materials available at the time of * * * have corresponding product failure certificates.
Second, the tools needed in the project:
Spray gun: including spray gun and sand blasting gun. Return tools: including air pump, painting air pump and large compactor; In addition, there are some rare building tools borrowed from the library.
Third, the construction work is:
3. 1 Responsible paint steel structure workers must have a special type of work operation certificate and be laid off.
3.2 There should be sufficient insurance protection measures at the steel structure paint anticorrosion painting job site, and the staff should be equipped with waterproof and ventilation measures to avoid flooding or poisoning accidents of their own personnel during anticorrosion painting.
3.4 When painting, if the anti-corrosion construction is stopped underground, the weather suitable for the construction site must be selected.
Four. Introduction of steel structure painting operation and construction technology;
1, process flow:
A, steel structure surface muddy (including dust removal and rust removal, etc. ) → Then apply the primer for the first time → Apply the topcoat for the second time → Check the engineering quality by circle repair.
(1) Cleaning technology for structural appearance construction during steel structure painting;
A, the nominal muddy reason has replaced the priming of steel structure, so before stopping priming, the parts that need to be painted and removed should be cleaned up accordingly, that is, in the current construction, the important muddy parts should be painted with dust, rust and oil stains. B, the liquefaction of the coating part will indirectly affect the poor quality of the top coat. Therefore, in order to improve the construction technology, the nominal rust removal quality of steel structures is always replaced by primary rust removal and secondary rust removal.
C, the so-called primary rust removal should make the steel surface present a unique color without metal.
D, the so-called secondary rust removal, refers to in addition to make the steel surface appear metallic luster, but also rub the wrong metal surface, make the primer contact with the steel structure surface worse, and achieve worse anti-corrosion effect.
Fifth, the secondary rust removal method often adopts process selection.
1 sandblasting derusting method is the most widely used method at present, and it is also the last one before the project. Its working principle is to use a pressure pump to distribute compressed air on quartz sand or iron sand in the west, quickly scrub the surface of the steel structure, and clean up pure substances such as rust and oil stains on the surface of the steel structure through friction and bumping. This is the least used derusting method before the project. After this construction,
2 pickling and derusting method, which is a kind of derusting construction method often used in the past. Its working principle is to remove the height of steel structure and soak it in acid solution for rust removal. This method is also very effective, and the rust removal is absolutely thorough. However, the construction is more troublesome. It is very important that the structure after pickling and rust removal must be washed with cold fire or clear water. However, if there is acid residue below, it is even more wrong.
Manual derusting method, which is a relatively tender derusting method compared with today, has not been used for a long time before, and has a quick effect. The derusting effect is the worst in the second-class table, and the foundation has been eliminated.
Six, steel structure before derusting brush paint agronomy:
6. 1 When the primer is sprayed, the first paint is generally red lead antirust paint, and the viscosity of red lead paint must be controlled before painting or spraying, so that the color and viscosity of the missing primer are uniform.
6.2 When painting or spraying primer, we should pay attention to the lazy and undercoating construction technology to change the situation that the brush drops too much paint, which will frustrate extravagance and waste.
6.3 When painting or spraying for the second time, you must wait until the rheumatism is cured for the first time before painting the second layer. Never do it again after the first drying, which will wrinkle the appearance of the steel structure and reduce the quality.
6.4 In some cases, before the second wet drying, pay attention to the music of the main layer and the second layer and prevent corrosion, which will make the film thickness uniform and different.
6.5 Only 5 ~ 7 hours after the primer coating is realized can we judge who can achieve the surface drying, and do not brush the top coat before the surface drying.
Seven, steel structure paint coating application process:
7. 1 It takes less time to apply and remove the top coat of steel structure responsibility paint, and some paint can be obtained. Because it will appear before the primer is brushed, it can still enter the steel structure outside the duty paint, but the consequences will be discounted, so we must find a shop exhibition with cheap prices and efficient products.
7.3 When painting the responsible paint and topcoat of steel structure, the paint needs to be constantly stirred during the application process, and the painting method and the direction of circling are the same as the following process.
7.4 The main reasons for coating and unloading the duty paint of steel structure are: the nozzle for dispensing glue and dropping quickly, the hose for calibrating the gun, which can be freely pushed to the work area, and the air pressure of the air compressor should be 0.5 ~ 0.8 N/mm2.
7.5 When spraying steel structure, the interval between nozzle and coating shall be observed. Generally, the distance between the spray gun and the service point should be 120 mm. 8.2 the responsible coating for steel structure, and the coating sprayed by the nozzle is in the name of the building on average, so as to ensure the consequences of coating without feet.
Eight, steel structure paint construction quality inspection standards.
1. Overview of anticorrosive coatings for steel structures;
1. 1 job coating for steel structure Before painting the steel structure, the steel structure that has been wrongly painted should be maintained to avoid dust or some pure objects sticking again when the paint is not dry.
1.2 Review of coating treatment of steel structure responsibility paint, ensure that the painted decorative layer has different colors, no bubbles and bright colors.
1.3 The theoretical film thickness of steel structure anticorrosive paint should be different from the standards required by the project. Anticorrosive paint should not be painted too thick or too thick. Too thick has no bad anti-corrosion effect, and too thick will lead to a waste of funds.
2, steel structure paint quality inspection score.
2. 1 All types, models and quality of paints used for steel structures outside buildings must meet the regulations and requirements of the national concealed irrelevant scale.
2.2 Before painting the steel structure, the derusting process of all steel surfaces that need to be constructed shall be carried out in accordance with national standards and regulations, and the rusty steel surfaces shall be free of any purity and burr.
2.3 In the process of coating the steel structure with the responsibility paint, there should be no scene of incorrect coating or missing coating, and the phenomenon of skin penetration and rust return will inevitably occur in the coating of the steel structure with the responsibility paint.
Scheme 3: Anti-corrosion construction scheme of steel structure
I. Compilation basis:
1, construction contract and Party A's technical requirements;
2. Rust grade and derusting grade of steel surface before painting GB/T 8923-88;
3. Code for Construction and Acceptance of Industrial Equipment and Pipeline Anticorrosion Engineering HGJ 229-91;
4. Safety Regulations for Painting Operation and Pretreatment Process Safety before Painting (GB 7692-87);
5, other relevant national anti-corrosion construction technical specifications and standards;
6, my unit's existing technical equipment and similar engineering construction experience and data accumulated for many years.
Second, the construction preparation:
1, material preparation:
1. 1 All materials that meet the needs of this project are purchased from material suppliers, and their performance meets the requirements of Party A and relevant standards and specifications.
1.2 All kinds of anticorrosive coatings should have written quality certification materials such as factory certificate, quality inspection report or product manual.
1.3 All kinds of raw materials shall be transported to the construction site, reported to the quality management personnel of Party A for acceptance, and then put into use.
1.4 If there is any doubt about the material quality of some materials, samples can be taken from local authorities for secondary testing and identification.
2, personnel preparation:
2. 1 Appoint Cheng, the experienced deputy manager of our company in construction management, as the project manager to be responsible for the overall work of the project;
2.2 Assign an engineer to be responsible for the technical work of the project;
2.3 Assign a safety officer and a quality inspector to be responsible for the safety and quality inspection of the project respectively;
2.4 Assign 20 skilled derusting and anticorrosion workers to participate in the construction.
3, construction equipment preparation:
The project started ahead of schedule, and all kinds of construction instruments to be put into the project were put into the site, and the construction instruments were working normally. Construction personnel involved in this project include: mixers, angle grinders, etc.
Third, the construction process:
Construction Preparation-Surface Treatment-Inspection Qualified-Primer Painting Qualified-Additional Primer Painting Qualified-Intermediate Paint Painting Qualified-Top Paint Painting Qualified-Additional Top Paint Painting Qualified-Acceptance.
Four, the main construction methods of partial projects:
1, surface treatment:
1. 1 The metal surface should be derusted before anticorrosion, and the derusting method is a combination of electric tools and manual derusting. The metal surface after derusting shall meet the St3 standard specified in GB/T8923-88 "Rust Grade and Derusting Grade of Steel Surface before Painting". The back corner that is not easy to clean should also meet the St2 standard.
St3: It means that the treated corroded surface should present metallic luster.
St2: It means that the treated corroded surface has no visible dust, moisture, oil stain, dirt and weathered scale, rust layer and paint.
1.2 electric tools and manual derusting:
Use wire brush, shovel, sandpaper and grinding wheel net to remove rust, scale and old paint film with weak adhesion on metal surface.
1.3 derusting procedures shall be carried out according to the top-down construction sequence.
1.4 After the metal surface is derusted, the paint construction can be started only after it is accepted by the on-site supervision engineer of Party A and the concealed works are recorded.
2. Preparation of coating:
2. 1 The coating should be mixed evenly before preparation. If there are hard shells or other sundries, they must be removed before use. After the paint is opened, it must be sealed and preserved.
2.2 The prepared coating shall be fully mixed evenly and tested; Painting preparation should be determined according to the size of painting area and the thickness of paint film.
2.3 When preparing coatings, control the viscosity, not too thin or too thick. When adjusting the viscosity, use the special thinner for the paint to be adjusted; Don't use it indiscriminately. Tools used for coating preparation shall be kept clean and shall not be mixed.
3, coating method:
The construction adopts the method of combining roller coating with brush coating, roller coating is adopted for large-area construction, and brush coating is adopted for small components. The specific construction method is to choose a reasonable painting method according to the site conditions.
4, paint coating:
4. 1 Before painting, the cleaning brush and cotton gauze should wipe the metal surface clean.
4.2 Roller coating construction:
4.2. 1 Roller coating shall be carried out by combining roller coating with brush coating, and the parts of the roller that are not easy to be painted or cannot be painted shall be brushed with a brush. In order to ensure no leakage, when painting different kinds of paints, the painting tools shall not be mixed together.
4.2.2 During roller coating, each layer should be criss-crossed and repeated to meet the design requirements.
4.3 Brush coating construction:
When brushing, the brush should not be dipped in paint too much, generally 1/2 is appropriate, brushing should not be too hard, and brushing times should not be too much. When brushing, it should be criss-crossed to increase the adhesion of each layer of paint and supplement the shortcomings of brushing each other.
4.4 Paint coating shall be carried out in the construction order from top to bottom and from inside to outside. After each coating is completed, the next coating construction shall be carried out after curing, and the interval shall not be too long.
4.5 In order to ensure the thickness of the coating film, the amount of coating can be controlled, that is, a certain amount of coating can be used in a certain area.
4.6 After the coating surface is completed, the thickness of the paint film must be even and smooth, and there must be no defects such as dust and sagging on the surface. If any, it needs to be repaired.
4.7 During construction, the coating interval of each coating shall be carried out in strict accordance with the coating product manual provided by the manufacturer, and the previous coating shall be dried before the next coating is applied.
4.8 In order to ensure that the paint film color meets the design requirements, a trial coating should be carried out before the topcoat is painted, and the paint film color should be painted as a whole after reaching the design standard. In order to make the overall color consistent and color-free, the top coat should be painted by the same manufacturer and the same production batch number.
4.9 Don't brush your teeth too hard and brush your teeth too often. When brushing, it should be interwoven vertically and horizontally, which can increase the mutual adhesion of each layer of paint and supplement the shortage of mutual brushing.
4. During the construction of10, the construction sequence should be from top to bottom, and the last top coat should be painted in the smooth direction. When painting, it should be carefully operated, so that the coating is uniform, and there are no defects such as missing coating, foaming, discoloration and loss of light.
4. 1 1 After the surface of each coating is dried, the next coating construction can only be carried out after the on-site management personnel of Party A pass the inspection and handle the hidden records.
Verb (abbreviation of verb) Construction environment and matters needing attention:
1, the construction environment temperature 10 ~ 30℃, the relative humidity is not more than 85%, and the steel surface temperature is at least 3℃ higher than the dew point temperature.
2, rain, fog or environmental humidity is greater than 85%, the wind is not greater than 5 and the metal surface temperature is lower than 3℃ above the dew point, brushing operation is not allowed.
3. The coating should be free of quality defects, such as missing coating, sagging, bleeding, pinholes, orange peel, blistering, etc. , and the coating thickness should be consistent; Uniform color, no color difference, no slag inclusion and dust on the top coat.
Six, quality inspection:
Quality inspection runs through the whole process of construction. After the completion of each working procedure, the next working procedure can only be carried out after the management and acceptance of Party A are qualified and the engineering records are concealed. And meet the following standard requirements:
1, surface treatment inspection:
After mechanical derusting, the metal surface reaches the St2 or St3 standard specified in GB/T8923-88 "Rust Grade and Derusting Grade of Steel Surface before Painting".
St2: Thorough manual and electric tools should be used for derusting. There should be no visible grease and dirt on the steel surface, and there should be no scale, rust, paint coating and other attachments that are not firmly attached.
St3: Very thorough hand and electric tools should be used to remove the rust on the steel surface, and there should be no visible grease and dirt, and there should be no attachments such as scale, rust and paint coating that are not firmly attached. Derusting is more thorough than St2, and the exposed surface of the substrate should have metallic luster.
2, anticorrosive coating:
2. 1 appearance inspection: the coating should be smooth, uniform in color and free from defects such as pinholes, bubbles and peeling. Check with a magnifying glass of 5 ~ 10 times, and it is qualified if there are no micropores.
2.2 Inspection of coating thickness: measured with a thickness gauge, the coating thickness should be uniform, and the coating thickness and number of layers should meet the design requirements.
2.3 Adhesion inspection: use the cross method to check the adhesion of the coating.
Seven, safety construction technical measures:
1. Workers and management personnel participating in the project construction must carry out construction safety technology education before construction, and always adhere to the safety policy of "safety first, prevention first".
2, set up a professional security officer, responsible for the supervision and inspection of construction safety. Make sure the guarantee is strong.
3, the power switch should be installed according to the leakage safety protection switch, the lighting device should be protected by a protective cover to prevent the bulb from breaking and causing fire, the voltage should not be higher than 24V, and the light wire must be rubber wire, and there should be no leakage. Electrical equipment, lighting lamps and switches used in flammable and explosive environments should be explosion-proof. All electric tools must be turned off after use or not, and the power must be cut off.
4. Wear a safety helmet and a safety belt when working at heights of more than 2 meters. High blood pressure, amblyopia, deafness, flat feet and other physical abnormalities are prohibited.
5. Personnel engaged in engineering construction should be equipped with necessary labor protection articles, such as work clothes, work shoes, gloves, hats and masks.
6. Anti-corrosive paint materials are flammable, and various solvents are mostly toxic and flammable liquids. Volatile gas becomes explosive when mixed with air. Therefore, a special warehouse should be set up at the site, and the material warehouse should be ventilated and equipped with fire fighting equipment.
7, duty paint materials should be sealed, the warehouse should be cool and dry, the temperature is 65438 00℃, but not lower than 0℃. Natural ventilation or mechanical ventilation should be adopted in summer.
8, the construction site should pay attention to fire prevention, it is forbidden to smoke and use electric furnace and other fire fighting equipment.
9. When it is necessary to connect the temporary power supply during the anti-corrosion construction, an application for temporary power utilization shall be made, and the location of the construction site and the total amount of construction power consumption shall be reported to the construction unit, and the electrical engineer shall be responsible for the connection. Draw a restricted area in the construction electricity consumption area of the anti-corrosion site, set up fences and post warning signs.
10, during anti-corrosion construction, check whether the electrical devices and protection facilities are in good condition; It is forbidden to operate the equipment "with illness". Deactivated equipment must be closed and the switchboard must be locked; Find problems, report and solve them in time; The removal or dismantling of electrical equipment must be carried out after the electrician cuts off the power supply and properly handles it.
1 1, and the temporary electricity utilization works on the construction site shall be inspected once a week; Unsafe factors must be dealt with in time; And perform the examination and acceptance procedures. Attention should be paid to fire prevention and electric shock accidents in living quarters and construction sites.
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