GBJ 126-1989 Specification for construction and acceptance of thermal insulation projects for industrial equipment and pipelines
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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Industrial Equipment and Pipeline Insulation Engineering
Construction and Acceptance Specifications
GBJ126—89
1989 Beijing
Engineering Construction Standard Full-text Information System
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National Standard of the People's Republic of China
Industrial Equipment and Pipeline Insulation Engineering
Construction and Acceptance Specifications
126—89
Editor Department: Ministry of Chemical Industry of the People's Republic of China Approval Department: Ministry of Construction of the People's Republic of China Implementation Date ：January 1, 1990
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Notice on the Release of the National Standard "Industrial Equipment and Pipeline Insulation Engineering Construction and Acceptance Specification"
(89) Jianbiaozi No. 151
According to the requirements of the former State Planning Commission's Document No. 10 [1984], the "Industrial Equipment and Pipeline Insulation Engineering Construction and Acceptance Specification" compiled by the Ministry of Chemical Industry and relevant departments has been reviewed by relevant departments and is now approved as the national standard "Industrial Equipment and Pipeline Insulation Engineering Construction and Acceptance Specification" GBJ126-89, which will be implemented from January 1990. This specification is managed by the Ministry of Chemical Industry, and the specific interpretation and other work is the responsibility of the Construction Technology Research Institute of the Ministry of Chemical Industry. The publication and distribution is the responsibility of China Planning Press. Ministry of Construction of the People's Republic of China
March 27, 1989
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Compilation Statement
This specification is based on the requirements of the former National Planning Model [1984] No. 10 document, edited by our Construction Technology Research Institute, and compiled together with relevant units. In the process of compiling this specification, the specification compilation team conducted extensive investigations and studies, carefully summarized the practical experience in the construction, design and production of thermal insulation engineering since the founding of the People's Republic of my country, especially in the past ten years, referred to relevant international standards and foreign advanced standards, carried out scientific research and experimental verification work on major technical issues, and widely solicited opinions from relevant units across the country. Finally, our ministry and relevant departments reviewed and finalized the draft. In view of the fact that this specification is compiled for the first time, we hope that all units will combine engineering practice and scientific research, carefully summarize experience, and pay attention to accumulating data during the implementation process. If you find that there are places that need to be modified and supplemented, please send your opinions and relevant materials to our Construction Technology Research Institute (mailing address: Huaizhong Middle Road, Shijiazhuang City, Hebei Province) for reference in future revisions. Ministry of Chemical Industry
March 1989
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 1 General
Chapter 2 Materials
Section 1 Quality Requirements
Section 2 Quality Inspection
Chapter 3 Preparation and Requirements for Construction
Section 1 General Provisions
Section 2 Preparation and Requirements before Construction
Chapter 4 Construction of Insulation Layer
Section 1
General Provisions
Section 2 Installation of Fixings and Supports
Section 3 Bundling Construction
Section 4 Masonry and Wrapping Construction
Section 5 Filling Construction
Section 6 Pasting Construction·
Section 7 Pouring Construction·
Section 8 Spraying Construction
Section 9 Construction of Removable Insulation Layer
Section 10 Expansion Joints and Expansion Gaps·Chapter 5 Construction of Moisture-Proof Layer
Section 1 General Provisions
Section 2 Asphalt Glue, Waterproof Cold Glue Glass Cloth Moisture-Proof LayerSection 3 Construction
Chapter 6 Construction of Protective Layer
Section 1 Metal Protective Layer||tt| |Section 2 Felt, foil and cloth protective layers
Section 3 Plastering protective layers
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Chapter 7 Safety Technology
Chapter 8 Project Acceptance
Section 1 Quality Inspection
Section 2 Handover Documents
Appendix 1 Glossary
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Explanation of terms used in this specification
Appendix II
(39)
Appendix III Conversion table of legal measurement units and non-legal measurement units (40)
Additional explanation
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Chapter I Generalbzxz.net
Article 1.0.1 This specification is formulated to implement the national energy conservation policy, improve the construction technology level of insulation engineering, ensure construction quality, reduce energy loss of process equipment, pipelines and their accessories, improve working conditions and increase economic benefits. Article 1.0.2 This specification applies to the construction and acceptance of external insulation engineering of industrial equipment and pipelines with a medium temperature range of greater than or equal to minus 196°C and less than or equal to plus 850°C.
This specification does not apply to the insulation engineering of equipment and pipelines in the nuclear power, aviation and aerospace industries, long-distance pipelines and furnace wall insulation engineering of industrial furnaces. Article 1.0.3 The construction of industrial equipment and pipeline insulation projects must be carried out in accordance with the design documents and the provisions of this specification. When it is necessary to modify the design, substitute materials, or use new materials, the original design unit must agree. Article 1.0.4 The construction of industrial equipment and pipeline insulation projects can only be started after the following conditions are met.
1. The design documents and relevant technical documents are complete, and the construction drawings have been reviewed; 2. The construction organization design or construction plan has been approved, and the technical briefing and technical training of construction personnel have been completed.
Article 1.0.5 In addition to implementing this specification, the construction of insulation projects shall also comply with the provisions of the current relevant national standards and specifications. Engineering Construction Standard Full-text Information System
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Chapter 2 Materials
Section 1 Quality Requirements
Article 2.1.1 The quality of insulation layer materials shall comply with the following provisions: 1. The insulation layer material shall have an equation or chart for the thermal conductivity that changes with temperature. When the average temperature of the thermal insulation materials and their products used as the heat preservation layer is less than or equal to 623K (350℃), the thermal conductivity value shall not be greater than 0.12W/(m·K) [0.103kcal/(m·h·℃l; when the average temperature of the thermal insulation materials and their products used as the cold insulation layer is less than 300K (27℃), the thermal conductivity value shall not be greater than 0.064W(m·K) [0.055kcal/(m·h·℃)].
2. Thermal insulation materials and their products used for heat preservation: their bulk density shall not be greater than 400kg/m; thermal insulation materials and their products used for cold preservation, their bulk density shall not be greater than 220kg/m. 3. The compressive strength of hard thermal insulation products used for heat preservation shall not be less than 0.4MPa (4kgf/cm2); the compressive strength of hard thermal insulation products used for cold preservation shall not be less than 0.15MPa (1.5kgf/cm2).
4. Insulating materials and their products should have data or instructions on flame retardancy, expansion performance and moisture resistance, and should meet the requirements for use. 5. The chemical properties of insulating materials and their products should be stable and should not corrode metals. When used on austenitic stainless steel equipment or pipelines, the chloride ion content index should comply with the allowable range of Figure 2.1.1, and can also be verified by the following formula: lgy≤0.123+0.6771gx
Where y is the measured Cl ion content (ppm); x is the measured Na+SiO: ion content (ppm). (2. 1. 1)
VI. Bulk insulation materials used for filling structures shall not be mixed with debris and dust. The content of slag balls greater than or equal to 0.5mm in fiber insulation materials should be: Slag wool Engineering 2 Construction Standard Full Text Information System
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Unallowed Range
ppm(Na+S10)
Allowed Range
Figure 2.1.1 Allowed range of CI content in insulation materials is less than 10%, rock wool is less than 6%, and glass wool is less than 0.4%. Porous granular insulation materials with a diameter less than 0.3mm should not be used. Section 2.1.Article 2 The quality of moisture-proof layer materials shall meet the following requirements: 1. They must have good waterproof and moisture-proof properties. 2. They should be resistant to atmospheric corrosion and biological invasion, and should not be moth-eaten or mildewed.
3. They should not corrode or dissolve other materials. 4. They should have the stability to remain intact under temperature changes and vibrations. Article 2.1.3 In addition to meeting the requirements of Article 2.1.2 of this Code, the quality of protective layer materials shall also meet the following requirements: 1. They should be non-combustible or flame-retardant materials. Engineering Construction Standard Full Text Information System
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2. Equipment or pipelines that store or transport flammable and explosive materials, as well as other pipelines erected on the same support or at intersections with such pipelines, must use non-combustible materials for their protective layers.
3. They should be non-toxic, non-smelly, beautiful in appearance, and easy to construct and repair. 4. The fireproof performance of the surface coating of the protective layer shall comply with the provisions of the current relevant national standards and specifications.
Section 2 Quality Inspection
Article 2.2.1 Insulation materials and their products must have a product quality certificate or a factory certificate, and their specifications, performance and other technical requirements shall comply with the provisions of the design documents.
Article 2.2.2 When the indicators listed in the product quality certificate or factory certificate of insulation materials and their products are incomplete or there is doubt about the product quality (including on-site self-made products), the supplier shall be responsible for re-inspecting the following properties and shall submit an inspection certificate: 1. The bulk density, mechanical strength, thermal conductivity, and external dimensions of porous granular products. 2. The bulk density, thermal conductivity, and particle size of loose materials. 3. The bulk density, thermal conductivity, operating temperature, and external dimensions of mineral wool products. 4. The bulk density, thermal conductivity, operating temperature, and fiber diameter of loose wool. 5. The bulk density, thermal conductivity, moisture content, operating temperature, and external dimensions of foam porous products.
4. Bulk density, thermal conductivity, moisture content and dimensions of cork products. 5. Insulation materials and products used on austenitic stainless steel equipment or pipelines shall be subject to the chloride ion content index.
Article 2.2.3 Insulation materials and products that have been damp shall not be used if they cannot restore qualified performance after drying. The moisture content of insulation materials and products used in cold preservation projects shall not exceed 1%. The maximum moisture content of cork products shall not exceed 5%.
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Article 2.2.4 The re-inspection of moisture-proof layer, protective layer materials and products shall comply with the following provisions:
1. The dimensions shall meet the requirements and shall not have defects such as perforation, cracking, delamination, etc. 2. The metal materials used for thermal insulation structures shall comply with the requirements of the current national standards such as "Hot-rolled Aluminum and Aluminum Alloy Plates", "Allowable Dimensional Deviations of Aluminum and Aluminum Alloy Materials", "Technical Conditions for Ordinary Carbon Structural Steel and Low-alloy Structural Thin Steel Plates" and "Continuous Hot-dip Galvanized Thin Steel Plates and Strips".
3. Sampling inspection: Indicators such as tensile strength, compressive strength, bulk density, moisture permeability, heat resistance, cold resistance, etc. shall all comply with the requirements of standards or product specifications. Article 2.2.5 The test methods and instruments used for material inspection shall comply with the provisions of the current relevant national standards.
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Chapter 3
Preparation and Requirements for Construction
Section 1 General Provisions
Article 3.1.1 Before construction, the performance of thermal insulation materials and their products shall be checked; if there are special requirements for the storage period, environment and temperature, they shall be stored according to material classification. During storage, facilities such as moisture-proof, waterproof, anti-freeze, and anti-extrusion deformation (molded products) should be set up according to the different types of materials. The stacking height should not exceed 2m. Protective measures should be taken when stacking in the open air.
Article 3.1.2 The insulation construction of industrial equipment and pipelines should be carried out after the strength test and air tightness test of the industrial equipment and pipelines are qualified and the anti-corrosion project is completed. Article 3.1.3 When welding the fixings of the insulation layer on industrial equipment and pipelines with anti-corrosion and lining, welding and post-weld heat treatment must be carried out before anti-corrosion, lining and pressure testing.
Article 3.1.4 When constructing outdoor insulation projects on rainy and snowy days and cold seasons, rain and snow and anti-freeze measures should be taken.
Section 2 Preparation and requirements before construction
Article 3.2.1 Construction machinery and tools for processing insulation layers, moisture-proof layers, protective layers and prefabricated products must be equipped.
Article 3.2.2 The construction site must temporarily set up water supply, power supply, fire protection and other facilities, the roads should be unobstructed, and there should be corresponding processing sites, and the construction machinery and tools should be reasonably matched. Article 3.2.3 When the insulation materials and their products are shipped out, their varieties, specifications, validity periods, and appearance inspections should be carried out. Article 3.2.4 Before the insulation layer is constructed, the following conditions must be met: 1. The supporting parts and fixing parts are in place. 2. The equipment, pipeline supports, hangers and structural accessories, instrument take-over parts, etc. are all Engineering 6 Construction Standards Full Text Information System
W.bzsoso.coIArticle 2 The insulation construction of industrial equipment and pipelines shall be carried out after the strength test and air tightness test of industrial equipment and pipelines are qualified and the anti-corrosion project is completed. Article 3.1.3 When welding the fixings of the insulation layer on industrial equipment and pipelines with anti-corrosion and lining, welding and post-weld heat treatment must be carried out before anti-corrosion, lining and pressure testing.
Article 3.1.4 When constructing outdoor insulation projects on rainy and snowy days and cold seasons, rain and snow and anti-freeze measures should be taken.
Section 2 Preparation and Requirements before Construction
Article 3.2.1 Construction machinery and tools for processing insulation layer, moisture-proof layer, protective layer and prefabricated products must be equipped.
Article 3.2.2 The construction site must be temporarily equipped with water supply, power supply, fire-fighting and other facilities, the road should be unobstructed, and there should be corresponding processing sites, and the construction machinery and tools should be reasonably matched. Article 3.2.3 When the insulation materials and their products are shipped out, their varieties, specifications, validity periods, and appearance inspections should be checked. Article 3.2.4 Before the construction of the insulation layer, the following conditions must be met: 1. The supporting parts and fixing parts are in place. 2. The equipment, pipeline supports, hangers and structural accessories, instrument take-over parts, etc. are all in place.Article 2 The insulation construction of industrial equipment and pipelines shall be carried out after the strength test and air tightness test of industrial equipment and pipelines are qualified and the anti-corrosion project is completed. Article 3.1.3 When welding the fixings of the insulation layer on industrial equipment and pipelines with anti-corrosion and lining, welding and post-weld heat treatment must be carried out before anti-corrosion, lining and pressure testing.
Article 3.1.4 When constructing outdoor insulation projects on rainy and snowy days and cold seasons, rain and snow and anti-freeze measures should be taken.
Section 2 Preparation and Requirements before Construction
Article 3.2.1 Construction machinery and tools for processing insulation layer, moisture-proof layer, protective layer and prefabricated products must be equipped.
Article 3.2.2 The construction site must be temporarily equipped with water supply, power supply, fire-fighting and other facilities, the road should be unobstructed, and there should be corresponding processing sites, and the construction machinery and tools should be reasonably matched. Article 3.2.3 When the insulation materials and their products are shipped out, their varieties, specifications, validity periods, and appearance inspections should be checked. Article 3.2.4 Before the construction of the insulation layer, the following conditions must be met: 1. The supporting parts and fixing parts are in place. 2. The equipment, pipeline supports, hangers and structural accessories, instrument take-over parts, etc. are all in place.
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