GB 50046-1995 Code for design of corrosion protection for industrial buildings

This specification is applicable to the anti-corrosion design of industrial buildings and structures subject to corrosive media, but not to corrosion caused by stray current. GB 50046-1995 Industrial Building Anti-Corrosion Design Specification GB50046-1995 Standard download decompression password: www.bzxz.net

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National Standard of the People's Republic of China
50046-95
Code for anticorrosion design of industrial constructions
1995-07-03 Issued
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
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1996-01-01 Implementation
Jointly Issued
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National Standard of the People's Republic of China
Code for anticorrosion design of industrial constructions industrialGB50046—95
constructions
Editor: Ministry of Chemical Industry of the People's Republic of ChinaApproval department: Ministry of Construction of the People's Republic of ChinaEffective date: January 1, 1996
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Notice on the release of the national standard
"Design Code for Anti-Corrosion of Industrial Buildings"Jianbiao [1995] No. 390bzxz.net
According to the requirements of the State Planning Commission's Document No. [1991] 290, the "Design Code for Anti-Corrosion of Industrial Buildings" revised by the Ministry of Chemical Industry and relevant departments has been reviewed by relevant departments. The "Design Code for Anti-Corrosion of Industrial Buildings" GB50046—95 is now approved as a mandatory national standard and will be implemented from January 1, 1996. The original national standard "Design Code for Anti-Corrosion of Industrial Buildings" GBJ46—82 will be abolished at the same time. This specification is managed by the Ministry of Chemical Industry, and its specific interpretation and other work is the responsibility of China Huanqiu Chemical Engineering Company. The publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
July 3, 1995
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Engineering Construction Standard Full Text Information System
Basic Provisions
Corrosive Classification
General Plan and Building Layout
Concrete Structure
Steel Structure
Masonry Structure
Wooden Structure
Pile Foundation
Building Protection
Equipment Foundation
Trenches and Pit
Surface protection of components
Storage tanks, sewage treatment pools
Outdoor pipe racks
Exhaust pipes
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General provisions
Cement mortar and concrete
Corrosion-resistant blocks
Metal ·
Asphalt materials
Water glass materials
Resin materials.
Anti-corrosion coatings
Appendix A
Appendix B
Appendix D
Appendix E
Appendix F
（40）
（43）
（44)
Examples of corrosive media in production areas
中*中**电*（46）
Corrosion resistance of commonly used materials
Physical properties of commonly used materials Mechanical properties
Mix ratio of corrosion-resistant materials
Common coating matching
Explanation of terms used in this specification
Additional explanation
Appendix: Explanation of clauses·
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Engineering construction standard full text information system
1.0.1 This specification is formulated to prevent or reduce the corrosive effects of corrosive media on buildings and structures, and to make the anti-corrosion design of industrial buildings technologically advanced, economically reasonable, safe and applicable, and ensure quality.
1.0.2 This specification is applicable to the anti-corrosion design of industrial buildings and structures affected by corrosive media, and is not applicable to corrosion caused by stray current. 1.0.3 The anti-corrosion design of buildings should be prevention-oriented. According to the corrosiveness of the media generated in the production process, environmental conditions, production, operation, management level and maintenance conditions, etc., measures should be taken according to local conditions, differentiated treatments, and comprehensive consideration of anti-corrosion measures. Protection should be strengthened for parts with a greater impact on production, parts that endanger personal safety and are difficult to repair, and important load-bearing components. 1.0.4 In addition to complying with this specification, the anti-corrosion design of buildings shall also comply with the provisions of relevant current national standards and specifications.
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Engineering Construction Standard Full-text Information System
2 Terms
sclassification
2.0.1 Corrosiveness classification
Corrosiveness
According to the degree of damage to building materials by corrosive media, that is, factors such as changes in appearance, weight changes, strength loss, and corrosion rate, the corrosiveness level is comprehensively evaluated and divided into four levels: strong corrosion, medium corrosion, weak corrosion, and no corrosion. 2.0.2 Corrosive water Corrosive water
Water containing anions and cations that are corrosive to building materials. 2.0.3 Contaminated soilContaminatedsoil
Soil whose original physical, mechanical and chemical properties have been changed by corrosive media.
4 Slightly soluble mediumSlightly soluble mediumAlkali and salt media with a solubility of less than 2g/1 in water at a temperature of 20℃. 2.0.5 Soluble mediumSoluble medium
Alkali and salt media with a solubility of equal to or greater than 2g/1 in water at a temperature of 20℃.
Slightly hygroscopic medium2.0.6
medium
Alkali and salt media with a relative equilibrium humidity of equal to or greater than 60% at a temperature of 20℃. 2.0.7 Hygroscopic mediumHygroscopic mediumAlkali and salt media with a relative equilibrium humidity of less than 60% at a temperature of 20℃. 2.0.8 Inhibitor of steel inconcrete An admixture added to concrete to prevent or slow down the corrosion of steel bars. 9 Glass flake mortar Glass-flakemasticresin 2.0.9
A mixed material that is made of resin as a binder and glass flakes and powder, and can be applied by scraping.
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3 Basic Provisions
3.1 Corrosiveness Classification
3.1.1 Corrosive media can be divided into five categories according to their corrosion to buildings: gaseous media, corrosive water, acid, alkali and salt solutions, solid media and contaminated soil; various media should be classified according to their properties and contents.
The category of corrosive media in the production area should be determined according to the production conditions and can be determined according to Appendix A of this specification.
3.1.2 The long-term corrosiveness of various media on building materials can be divided into four levels: strong corrosion, medium corrosion, weak corrosion, and no corrosion. When multiple media act at the same time, the highest corrosiveness level should be used. 3.1.3 The relative humidity of the environment should adopt the annual average relative humidity of the region or the actual relative humidity of the location of the components; the relative humidity of the environment of outdoor components can be appropriately increased compared with the annual average relative humidity according to the regional precipitation conditions. For areas where condensation is unavoidable and areas that are often in a humid state, the relative humidity of the environment should be greater than 75%. 3.1.4 At normal temperature, the corrosiveness level of gaseous media on building materials should be determined according to Table 3.1.4 based on the type of media and the relative humidity of the environment. When the content of gaseous media is lower than that in Table 3.1.When the lower limit value in 4 is reached, the corrosivity level can be reduced by one level accordingly.
Corrosiveness of gaseous media on building materials Medium
(mg/m2)
Environmental phase
Humidity
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Concrete
Concrete
Brickwork
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Ammonium oxide (metal oxide
Monoxide
(mg/m*)
Environmental phase
Humidity
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Concrete
Concrete
Brickwork
Continued Table 3.1.4
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(mg/m2)
10~200
Environmental phase||tt ||To humidity
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Concrete
Concrete
Brickwork
Continued table 3.1.4
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Monoxide
(mg/m2)
Environmental
To humidity
Concrete
Concrete
Brickwork
Note: ①The corrosiveness level of the medium to prestressed concrete can be determined according to reinforced concrete; continued table 3.1.4
②The corrosiveness level of the medium to stone masonry built with cement mortar can be determined according to plain concrete. 3.1.5
At room temperature, the corrosiveness level of corrosive water to building materials should be determined according to the type of corrosive medium in accordance with Table 3.1.5. ||tt ||Corrosive water to building materials Corrosive level Medium
Medium components
Hydrogen ion index pH value
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Concrete
Concrete
Brickwork
Engineering construction standard full text information system
Medium components
Corrosive carbon dioxide (mg/1)
Sulfate ion SO.2- content
(mg/l)
Chloride ion C1- content (mg/1)
Magnesium ion Mg2+ content (mg/1)
Ammonium ion NH+ content (mg/l)
Sodium ion Na+,
Potassium ion K+ content of caustic soda (mg/1)
1000~4000
25 0~1000
5000~10000
500~5000
3000~4000
1500~3000||tt| |800~1000
500~800
50000~100000
<50000
Concrete
Continued Table 3. 1.5
Concrete
Brickwork
Note: ①When the component is located in soil with a permeability coefficient of less than 0.1m/d, the index values ​​of S4~S18 in the category column in the table should be multiplied by a coefficient of 1.3;
②The corrosiveness level of the medium to prestressed concrete can be determined according to reinforced concrete, and ③The corrosiveness level of the medium to stone masonry constructed with cement mortar can be determined according to plain concrete. 3.1.6
At room temperature, the corrosiveness level of acid, alkali and salt solutions to building materials should be determined according to Table 3.1.6 based on the type of medium.
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