Summary of disclosure: component production

Disclosure content:

1Lofting, blanking and cutting shall be carried out first for steel structure fabrication. During lofting and blanking, weld shrinkage allowance and equal machining allowance for cutting, edge planing and milling during fabrication and installation shall be reserved according to process requirements.Before gas cutting, rust and dirt on the surface of steel cutting area shall be removed, and slag and spatter shall be removed after gas cutting;

2There should be no obvious concave surface or damage on the steel surface after correction, and the scratch depth shall not be greater than 0.5mm.When edge processing is required for gas cutting or mechanical cutting parts, the planing amount shall not be less than 2.0 mm

3When making holes, the accuracy and allowable deviation of bolt holes shall comply with the specifications. When the allowable deviation of bolt holes exceeds the specification, steel blocks shall not be used for filling. Welding rods matching with the base material can be used for repairing and re drilling. Before assembly, parts and components shall be inspected and qualified, and each side of connecting contact surface and weld edge shall be 30mm –The rust, burr, dirt, ice and snow within the range of 50 mm shall be removed, and the splicing of plates and profiles shall be conducted before assembly; the assembly of components shall be carried out after component assembly and welding correction, and the assembly sequence shall be determined according to the structural form, welding method and welding sequence.When the fixture is used for assembly, the base metal shall not be damaged when the fixture is removed; the residual welding scar shall be polished and leveled, and more than 75% of the contact surface shall be close to each other;

4During welding, the construction unit shall evaluate the welding process of the steel, welding materials, welding methods and post weld heat treatment adopted for the first time, and determine the welding process according to the evaluation report; during welding, the welding rod with coating falling off or the core rusted, the welding flux affected by damp caking and the fused welding shell shall not be used.The oil and rust of welding wire and welding nail shall be removed before use. During welding, the welder shall comply with the welding process, and shall not weld freely or strike arc on the base metal outside the weld bead. The corner of Welding Corner shall be welded continuously around the corner.When cracks appear in the welding corner, the welder shall not deal with it without authorization. The reason shall be found out and the repair process shall be determined before treatment.The same part of the weld should not be repaired more than twice.After welding, the welder shall clean the slag on the surface of the weld and the spatter on both sides, and check the appearance quality of the weld. After passing the inspection, the welder’s steel seal shall be made on the welding seam and parts specified in the process;

5When the grinding wheel is used to grind the friction surface, the grinding range shall not be less than 4 times of the bolt hole diameter, and the grinding direction shall be vertical to the force direction of the component. For the processed friction surface, the anti sliding coefficient test shall be conducted according to the batch before delivery. During transportation, the friction surface of the test piece shall not be damaged, and the treated friction surface shall not have flash, burr, welding scar or dirt;

6The steel structure shall be derusted before painting. The coating shall be uniform without obvious wrinkling and sagging, and the attachment shall be good. After coating, the original number of the component shall be marked on the component, and the weight, center position and positioning mark of the large component shall be marked.

Summary of disclosure: steel structure installation

Disclosure content:

1Before the installation of steel structures, the quality of steel members shall be inspected. The deformation and defects of steel members shall not exceed the allowable deviation. The measurement and correction of steel members installation shall be carried out according to the characteristics of the project.For the welding of thick steel plate and dissimilar steel plate and the main installation process of high strength bolt, the process test shall be carried out before the installation, and the corresponding construction technology shall be prepared.

2When the steel structure is installed by expanded assembly unit, the strength and stability of steel members that are easy to deform shall be checked, and reinforcement measures shall be taken if necessary; when the steel components are installed comprehensively, they shall be divided into several independent units, and the space steel unit shall be formed after all steel members of each unit are installed.

3After the columns, beams, roof trusses, supports and other main components of the steel structure are installed in place, they should be corrected and fixed immediately.The steel members installed on the same day form a stable space system.During the installation and rectification of steel structure, corresponding adjustment measures should be taken according to the influence of external environment such as wind, temperature difference, sunshine and welding deformation;

4When using the installed steel structure to lift other components and equipment, it shall be approved by the design unit, checked and calculated, and corresponding measures shall be taken.

570% of the contact surface of the joints which are required to be tightened in the design shall be close to each other.With a 0.3mm thick feeler gauge, the sum of the insertable areas shall not be greater than 30% of the total contact area, and the maximum edge clearance shall not be greater than 0.8mm;

6When installing high-strength bolts, the bolts shall be free to penetrate into the holes and shall not be used as temporary installation bolts.The installation of high-strength bolts should be tightened in a certain sequence, and should be screwed outward from the center of the bolt group, and should be finished in the same day.

Abstract: steel structure painting

Disclosure content:

1Before coating, the steel surface shall be derusted, and the steel surface after chemical derusting shall be exposed with metallic luster. After treatment, the steel surface shall be free of welding slag, welding scar, dust, oil stain, water and burr, and there shall be no false coating, missing coating, coating falling off and rust returning.

2The rust removal grade of steel surface before coating shall meet the requirements of design and current national specifications,

The painting should be uniform, without obvious wrinkle, falling, bubbles and other phenomena, good adhesion, clear and neat color separation line.

Summary of disclosure: safety disclosure of welders

Disclosure content:

1Strictly abide by the basic regulations on safety production of construction and installation workers

2The shell of electric welding machine must be well grounded, and the installation and disassembly of its power supply should be carried out by electricians;

3The electric welding machine shall be equipped with a separate switch, which shall be placed in the rain proof gate box, and shall be operated laterally with gloves when closing;

4Welding tongs and handle wires must be well insulated and firmly connected. Gloves should be worn when replacing welding rods.When working in wet place, stand on insulating rubber board or wood board;

5It is strictly forbidden to weld on pressure vessels or pipes. The power supply of live welding equipment must be cut off first.

6Welding containers or pipes that have stored inflammable, explosive and toxic substances must be cleaned and all orifices shall be opened;

7It is forbidden to contact the wire rope with the wire rope or replace the zero line with wire rope or electromechanical equipment. All ground wire joints must be firmly connected;

8When changing the handle wire in the site, the power supply should be cut off, and it is not allowed to climb the ladder or climb the height with the handle wire in hand;

9When cleaning the welding slag and using electric gouging to clean the root, wear protective glasses or mask to prevent the splashing of iron slag to hurt people;

10In case of thunderstorm, outdoor operation shall be stopped;

11Explosive materials shall be removed around the welding site, or covered and isolated.

At the end of the work, the power supply of the welding machine should be cut off, and the operation site should be checked to ensure that there is no fire danger before leaving.

Summary of disclosure: safety disclosure of painters

Disclosure content:

Basic regulations on safety production of painters

1All kinds of paint and other inflammable and toxic materials shall be stored in the special warehouse and shall not be mixed with other materials. Volatile paint shall be put into closed containers and kept properly.

2The warehouse should be well ventilated and no one is allowed to live. Fire fighting equipment and obvious signs of “no fireworks” should be set up. The warehouse should keep a certain safe distance from other buildings.

3Sand blasting shall be used to remove rust, and the nozzle joint shall be firm, and it is not allowed to face people.If the nozzle is blocked, it can be repaired or replaced after stopping the machine to eliminate the pressure;

4Use of kerosene, gasoline, pine perfume, acetone and other oil mix, wear protective equipment, and strictly prohibit smoking.

5. cotton yarn, rags, oil paper and other wastes contaminated with paint shall be collected and stored in covered metal containers for timely treatment;

6Keep good ventilation when spraying indoors or in containers. No fire is allowed around the spraying operation

7Electrostatic spraying is adopted. In order to avoid electrostatic accumulation, the spraying room (shed) shall be equipped with grounding protection device;

8The safety belt must be hung in a firm place when the window sash is opened outside. The eaves Board shall be brushed and the scaffold or hanger shall be set up for the downpipe. When painting on the iron sheet roof with a temperature greater than 25 degrees, movable plate ladder, protective railing and safety net shall be set.

When using blowtorch, the oil should not be too full, the air should not be too long, and the nozzle should not be aimed at people when igniting.

Summary of disclosure: safety disclosure of lifting workers

Disclosure content:

（1） Basic regulations on safety production of crane workers

1Crane driver

A. Drivers must be trained by provincial and municipal labor departments or designated units, or by professional schools. The training time shall not be less than six months. The training content shall include two parts: basic theoretical knowledge and practical operation.

B. Without the approval of the competent department, the driver shall not allow the operation of the crane other than the driver of the crane

C. In normal operation, the driver shall obey the command signal of the commander wearing the sign, and it is strictly forbidden to follow other personnel blindly

D. The driver shall not operate the crane under any of the following circumstances

(1) Unclear command signal

(2) Dangerous command

(3) Command not conforming to crane performance

(4) Use the command signal of flag language, gesture and sound not conforming to the provisions of GB 5082

E. In the operation, if there are more than two commanders and only one commander sends out the command signal, the operation can be carried out only when two or more commanders send command signals at the same time. In the whole process of operation, the operation can only be carried out under the command of the commander. It is strictly forbidden to operate without command, let alone disobey the command signal and operate without authorization

2Commander

A. In the process of crane operation, special commanders must be designated and work under their command

B. The commander must be specially trained, pass the examination and hold the certificate of the competent department

C. Commanders must wear signs in accordance with the relevant provisions of GB 5082

D. The commander must know the performance of the crane under command

E. The commander shall check the hook of steel wire rope used in operation according to the relevant provisions of gb5144 and gb5972, and those who fail to meet the requirements are prohibited

3Crane operation

The crane shall be operated by a professional driver in strict accordance with the operation regulations of the crane.

Summary of disclosure: safety disclosure of construction and installation workers

Disclosure content:

Basic regulations on safety production of construction and installation workers

1Strictly abide by the relevant provisions of “Province construction and installation engineering operation regulations”

2All kinds of workers engaged in construction and installation engineering must strictly abide by the technical regulations for safe operation of this type of work. All kinds of mechanical operators and other types of work shall strictly abide by the safety operation regulations for operating machinery and machines and tools when operating various machines and tools.

3Workers (including apprentices, interns, training agents and migrant workers) participating in the construction shall be familiar with the safety technical operation procedures of their own type of work, and shall stick to their posts during operation, and it is strictly forbidden to operate after drinking;

4Construction and installation workers must wear safety helmet and fasten the hat belt when entering the construction site. It is forbidden to wear slippers or barefoot. Safety belt must be worn when construction is carried out at high altitude, cliff or steep slope without protective facilities

5Before working, check the machinery, instruments and tools, and use them only after confirming the safety

6The electrical equipment of construction machinery shall not be operated with defects or overload operation. If abnormal conditions are found, it shall be stopped for inspection, and shall not be inspected and repaired during operation;

7The operation of electrical, instrument, pipeline and equipment shall be carried out in strict accordance with single safety technical measures, and scrubbing and repair are not allowed during operation.It is strictly forbidden to put head and hand into the scope of machinery and travel. All kinds of construction machinery shall be operated by licensed mechanical operators, and other personnel shall operate machines and machines irrelevant to work

8、 The ladder shall be free from defects. The distance between the rungs of the ladder shall be 750px. When using, the upper and lower ends of the ladder shall be placed firmly. Anti slip measures shall be taken at the lower end. The foot of the herringbone ladder shall be firm. The ladder used in the passage shall be supervised or fenced. The angle between the single side ladder and the ground shall be 60 ~ 70 degrees. Special person shall be assigned to supervise the ladder. It is forbidden for two persons to work on the ladder at the same timeIf the ladder is working at a height of more than 2m, the personnel shall wear safety helmet and fasten safety belt.

Summary of disclosure: production and installation of profiled metal plate

Disclosure content:

1Production of profiled metal plate

The variety, material, specification, coating and appearance quality of profiled metal plate shall meet the design requirements: after molding, the base plate shall be free of cracks; the surface of the plate shall be clean, free of oil stain, mud and sand; there shall be no obvious concave convex and wrinkle in large area; the coating or coating shall be free of visible cracks, spalling and scratches.

2Installation of profiled metal plate

The profiled metal plate shall be carried out after the quality inspection and evaluation of the steel structure installation engineering meet the requirements; the profiled metal plate, flashing plate and angle plate shall be fixed reliably without looseness; the anti-corrosion coating and waterproof sealing material shall be laid in good condition; the number and spacing of connectors shall meet the design requirements and current national regulations; the appearance of profiled metal sheet shall be flat, the connection shall be smooth, and the plate surface shall be free of construction Residues and dirt