It is a comprehensive problem to select a suitable cooling steel structure workshop. In order to solve this problem, we need to find out the key factors affecting the temperature of steel structure workshop. We should focus on the treatment of key factors. This method can be targeted to deal with other relatively small factors to achieve a good indoor environment and the highest performance and price. Than.
Steel, welding materials, coating materials and fasteners used in steel structure shall have quality certificate, and must meet design requirements and current standards.
In addition to the manufacturer's quality certificate, raw materials entering and leaving the factory shall be sampled, sent, inspected and inspected in accordance with the contract requirements and relevant current standards witnessed by Party A. Changzhou steel structure inspection record shall be made. Provide inspection report to Party A and supervise.
In the process of processing, if the defects of raw materials are found in Changzhou steel structure, they must be studied and treated by inspectors and technicians.
The manufacturer shall submit the material application Certificate (technical approval order) in advance, submit it to Party A for supervision and inspection, and the designer shall confirm the replacement before.
It is strictly forbidden to use peeling or rusty cores, wet caking or melted flux and rusty wires. The surface of stud used for stud welding shall be free from defects such as crack, strip, indentation and burr that may affect its use.
Welding materials should be centralized management, Changzhou steel structure and should establish a special warehouse. The warehouse should be dry and well ventilated.
Bolts shall be stored in a dry and ventilated room. The inspection and acceptance of high strength bolts shall be carried out in accordance with the requirements of the current national standard "code for design, construction and acceptance of high strength bolt connections in steel structures". It is strictly prohibited to use high strength bolts, rust, pollution, damp, bruise and mixed batches.
The coating shall meet the design requirements, Changzhou steel structure and be stored in special warehouse. Expired, deteriorated or caked coatings shall not be used.
(1) Non penetration: the blunt edges of the middle (x slot) or root (V, U groove) of the parent metal joint are not fully fused together, while the left part is not fused. The mechanical strength of the welded joint will be reduced by the non penetrating weld. The stress concentration point will be formed at the unpenetrated notch and end of the welded joint. When the welded joint bears the load, it is easy to cause cracking.
(2) Incomplete fusion: partial incomplete fusion between solid metal and filler metal (weld and base metal), or between filler metal (multi pass bead or weld layer), or spot weld (resistance welding) metal between base metal and substrate is not fully fused together, sometimes accompanied by slag inclusions.
(3) Porosity: in the process of melting and welding, the gas in the weld metal of Changzhou steel structure http://lasfinanzascambian.com/will overflow before the molten pool metal cools and solidifies, forming voids or voids on the weld. The interior or surface of the metal can be divided into single void, chain void and dense void (including honeycomb void) according to its morphology. In arc welding, due to the short metallurgical process time, the metal in the molten pool solidifies rapidly. The gas generated in the metallurgical process, the gas absorbed by the liquid metal, or the flux of the electrode decomposes to produce gas at high temperature. Even if the humidity in the welding environment is too high, the gas will decompose at high temperature. When some gases can not be precipitated in time, pore defects will be formed. Although the tendency of pore stress concentration is less than other defects, it destroys the compactness of weld metal, reduces the effective cross-sectional area of weld metal, and thus reduces the strength of weld metal.
Changzhou Longrui Steel Structure Co., Ltd. has introduced advanced technology and equipment, specializing in sandwich panel activity room, Jiangsu container type mobile room, color steel tile, C-section steel, light steel movable board house, etc Changzhou steel structure Activity room, color steel activity room, sandwich board, stainless steel products, road guardrail production, processing and installation; metal materials, building materials, thermal insulation materials sales.
In addition, the company is engaged in the construction of municipal engineering, foundation engineering, indoor and outdoor architectural decoration engineering, Changzhou container, thermal insulation engineering, Garden Road chemical engineering (the project that must be approved according to law can be carried out after the approval of relevant departments); the design of light steel production rooms with large and small spans such as activity exhibition hall, office, hospital, cold storage, etc., Jiangsu steel structure production and Installation. Adhering to the principle of customer first, our product design is reasonable and firm; set load-bearing, thermal insulation, waterproof, fire-proof structure, to give its long-term protection.
The company has been strict with quality management for a long time, adhere to the down-to-earth, dare to open up, continuous innovation as the purpose, in strict accordance with the quality management system standards, the pursuit of excellence, adhering to continuous innovation, for environmental protection and energy-saving color steel products and continuous efforts. After years of efforts, the company in Changzhou and neighboring cities have achieved good reputation. This makes a good foundation for building the brand of Longrui steel structural steel activity room. Warmly welcome the new and old customers to come to discuss guidance, sincere cooperation, create brilliant.
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