This standard is applicable to outdoor gas (pressure below 8 kg/cm2) and thermal (pressure below 14 kg/cm2) engineering facilities with seismic assessment and reinforcement intensity of degrees to degrees. It is not applicable to engineering facilities with special seismic requirements. GBJ 44-1982 Seismic Assessment Standard for Outdoor Gas and Thermal Engineering Facilities GBJ44-1982 Standard download decompression password: www.bzxz.net

Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Outdoor Gas Heating Engineering Facilities
Seismic Assessment Standard
GBJ44-82
1982 Beijing
Engineering Construction Standard Full-text Information System
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National Standard of the People's Republic of China
Outdoor Gas Heating Engineering Facilities
Seismic Assessment Standard
GBJ44—82
(Trial)
Editor: Beijing Capital Construction Committee Approval Department: National Capital Construction Committee of the People's Republic of China Trial Date: 1982 September 1, 2002
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Notice on Issuing
"Standards for Seismic Assessment of Outdoor Water Supply and Drainage Engineering Facilities" and "Standards for Seismic Assessment of Outdoor Gas and Thermal Engineering Facilities"
(82) Jianfashezi No. 125
According to the requirements of the Notice No. (78) Jianfashezi No. 562 of the State Capital Construction Commission, the "Standards for Seismic Assessment of Outdoor Water Supply and Drainage Engineering Facilities" and "Standards for Seismic Assessment of Outdoor Gas and Thermal Engineering Facilities" edited by the Beijing Capital Construction Commission and jointly compiled by the Beijing Earthquake Resistance Office and relevant units have been reviewed by relevant departments. The "Standards for Seismic Assessment of Outdoor Water Supply and Drainage Engineering Facilities" GBJ43-82 and the "Standards for Seismic Assessment of Outdoor Gas and Thermal Engineering Facilities" GBJ44-82 are hereby approved as national standards and will be implemented on a trial basis from September 1, 1982.
Both standards mentioned above are managed by Beijing Capital Construction Committee. The specific interpretation of water supply and drainage is the responsibility of Beijing Municipal Design Institute; gas and heat are the responsibility of Beijing Gas and Heat Design Institute. State Capital Construction Committee
March 30, 1982
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Preparation Instructions
This standard is edited by our committee in accordance with the requirements of the Notice No. 562 of the State Capital Construction Committee (78) Jianfashezi, and is jointly compiled by the Municipal Anti-seismic Office and Beijing Gas and Heat Design Institute and other relevant units. During the preparation of this standard, we followed the principle of "prevention is the priority in earthquake work", based on the relevant provisions of the current "Seismic Design Code for Outdoor Water Supply and Drainage and Gas Thermal Engineering", "Seismic Design Code for Industrial and Civil Buildings" and "Seismic Appraisal Standard for Industrial and Civil Buildings", combined with the actual situation of outdoor gas thermal engineering facilities in my country, carefully absorbed the experience of the Haicheng and Tangshan earthquakes, and widely solicited opinions from relevant units across the country, repeatedly discussed and revised, and finally reviewed and finalized with relevant departments. This standard is divided into four chapters and two appendices. Its main contents are: general provisions, seismic appraisal requirements and reinforcement treatment regulations for pipelines, storage tanks, and field and station facilities. This standard is compiled for the first time. During the trial implementation, please combine engineering practice, carefully summarize experience, and pay attention to accumulating information. If you find that there is a need for modification and supplementation, please send the relevant information and opinions to Beijing Gas Thermal Design Institute for reference during revision.
Beijing Capital Construction Committee
March 1982
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 1 General Provisions·
Chapter 2 Pipelines·
Section 1
General Provisions
Section 2 Overhead Pipelines
Section 3 Underground Pipelines
Chapter 3 Storage Tanks
Section 1
Section 2
Section 3
General Provisions
Equatorial Spherical Tanks, Horizontal Tanks, Vertical Tanks
Water Tank Gas Tanks
Chapter 4 Field and Station Facilities
Section 1
General Provisions||tt ||Section 2 Equipment
Section 3 Yard, Station Buildings and Pipelines
Seismic Verification of Overhead Pipe Racks
Appendix 1
Appendix 2 Explanation of Terms Used in This Standard
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Chapter 1 General Provisions
Article 1.0.1 This standard is formulated in order to implement the principle of "prevention should be the main focus in earthquake work", do a good job in seismic appraisal and reinforcement of outdoor gas and thermal engineering facilities in earthquake-stricken areas, avoid serious damage to outdoor gas and thermal engineering facilities during earthquakes and cause serious secondary disasters, and protect the safety of people's lives and property and important production equipment.
Article 1.0.2 For outdoor gas and thermal engineering facilities that meet the seismic assessment and reinforcement requirements of this standard, when encountering an earthquake with an intensity equivalent to the seismic reinforcement intensity, the seismic damage to facilities such as pipelines and storage tanks shall be controlled within a local area, generally not causing serious secondary disasters, and convenient for emergency repair and rapid restoration of use: their buildings generally will not fall down to injure people or damage important production equipment, and can continue to be used after repair. Article 1.0.3 This standard applies to outdoor gas (pressure below 8 kg/cm2) and thermal (pressure below 14 kg/cm2) engineering facilities with a seismic assessment and reinforcement intensity of 7 to 9 degrees, and does not apply to engineering facilities with special seismic requirements. Note: ① Outdoor gas includes artificial gas, natural gas, and liquefied petroleum gas. ② Liquefied petroleum gas engineering facilities are not subject to the pressure limit of 8 kg/cm2. Article 1.0.4 The seismic assessment and reinforcement intensity should be adopted according to the basic intensity. For key parts of gas and heat systems in large and medium-sized cities, if the intensity must be increased, the seismic appraisal reinforcement intensity can be increased by one degree compared to the basic intensity after approval is requested in accordance with the approval authority stipulated by the state. For underground gas and heat pipeline branches laid on Class 1 site soil in earthquake zones with a basic intensity of 7 or on solid and uniform Class I sites, seismic appraisal reinforcement is not required.
Note: The classification of site soil should comply with the following regulations Class I stable rock
Class I general stable soil except Class I and Class I site soil, Class II saturated loose sand, soft plastic to fluid light sub-clay, silt and silty soil, backfill and other loose artificial fill, etc.
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Article 1.0.5 When conducting earthquake-resistant appraisal and reinforcement, first of all, a comprehensive investigation and study shall be conducted on the design, construction, use status of facilities such as pipelines, storage tanks and buildings, and the impact of strong earthquakes in the area, and the favorable or unfavorable factors for earthquake resistance shall be judged in combination with the site and foundation soil conditions.
The quality defects such as the long-term use and corrosion of facilities such as pipelines and storage tanks, the inappropriate design of building structures, the improper arrangement of machines, pumps and horizontal tanks, the cracking of walls, cracks and damages on beams and column brackets shall all be considered as unfavorable factors in the structure and construction, and earthquake-resistant measures shall be strengthened. For pipelines, storage tanks and buildings built on the edge of Class III site soil and rivers, lakes, ditches and pits (including old river courses, hidden ditches, pits, etc.), which may cause landslides, ground fissures, ground subsidence and other unfavorable areas, earthquake-resistant measures shall be strengthened. Article 1.0.6 The seismic appraisal of buildings in gas and thermal engineering facilities shall comply with the requirements of the current national "Standards for Seismic Appraisal of Industrial and Civil Buildings". The seismic appraisal of some equipment of gas sources and thermal sources may refer to the requirements of the current "Standards for Seismic Appraisal of Industrial Equipment". Fire-fighting facilities at sites and stations with storage tank equipment in gas projects shall comply with the requirements of the current national "Code for Fire Protection Design of Buildings". Engineering 2 Construction Standards Full-text Information System
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Chapter 2 Pipelines
Section 1 General Provisions
Article 2.1.1 The layout of urban gas and thermal pipelines shall meet the following requirements:
1. Gas trunk lines should be connected into a ring; 2. Connecting lines should be set between the main lines of heat sources. Article 2.1.2 The seismic appraisal of gas and heat pipelines should focus on checking the site soil conditions of the main line, the setting of valves, the quality of pipeline welds at branches and corners, the material properties of auxiliary equipment and accessories, the strength and quality of brackets and wells (rooms), etc. Article 2.1.3 The gas and heat pipeline diagrams should indicate the diameter, material, interface method, and burial depth of the pipeline. The equipment, accessories, well (room) brackets, etc. on the pipeline should be numbered, and the pipeline direction should be marked with coordinates. The trunk line should also have geological and hydrological data along the line. Article 2.1.4 High- and medium-pressure gas trunk lines and heat trunk lines should be equipped with section valves. There should also be valves at the starting points of high- and medium-pressure gas branches and heat branches. If the above requirements are not met, additional valves should be installed.
Note: The division of high, medium, and low-pressure gas pipelines should be implemented in accordance with the provisions of the current national "Regional and Municipal Gas Design Code".
Article 2.1.Article 5 When the seismic assessment reinforcement intensity is 7 degrees, 8 degrees and the foundation soil is a liquefiable soil section and 9 degrees and the site soil is Class III, the cast iron valves and accessories at the starting points of gas (steel pipe laying), heat main lines and branches should all be ductile iron or cast steel valves and accessories.
Article 2.1.6 The valves of gas and heat pipelines should be flexible, tight and reliable; the equipment and accessories should not be seriously corroded. Otherwise, they should be repaired or replaced. Article 2.1.7 The manhole covers and ladders of the pipeline inspection platform, escalator and inspection well (room) should be safe and reliable, and should be reinforced or replaced if damaged. Engineering Construction Standard Full Text Information System
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Article 2.1.8 If the pipeline passes through the wall or foundation of the building and is embedded, a casing must be added. The gap between the casing and the pipeline should be filled with flexible materials. Section 2 Overhead Pipelines
Article 2.2.1 The movable supports of overhead pipelines shall take measures to prevent the pipelines from falling sideways during earthquakes, such as setting baffles. When the pipeline is supported by an articulated support (along the pipeline direction), measures to prevent the support from axially tipping over shall also be set at the support of the pipeline. Article 2.2.2 When the seismic assessment reinforcement intensity is 7 degrees, 8 degrees and the foundation soil is a liquefiable soil section and 9 degrees and the site soil is Class III, the pipe welds at the branches and corners of the pipeline shall be reinforced when the welding quality is poor or the corrosion is serious.
Article 2.2.3 The supports and hangers of the pipeline shall meet the following requirements: 1. The steel supports (hangers) erected on the wall and column shall be firmly anchored; 2. The supports at the branches and corners shall not have serious corrosion, open welding, deformation, cracks, and the bolts and nuts shall not have serious corrosion, looseness and slip buckles; 3. The spring supports shall not have serious corrosion and failure. If it does not meet the above requirements, it shall be repaired, reinforced or replaced. Article 2.2.4 Pipeline supports shall be verified for seismic resistance in accordance with the provisions of Appendix 1 of this standard; when the seismic identification reinforcement intensity is 7 degrees or 8 degrees and the site soil is Class I or I, the reinforced concrete supports or steel supports with good performance, no damage and no increase in load during operation may not be verified.
Section 3 Underground Pipelines
Article 2.3.1 Steel pipes should be used for gas trunk lines with foundation soil in liquefiable soil sections. For gas trunk lines passing through earthquake-causing fault zones and liquefiable soil sections, valves should be added at both ends, and flexible interfaces should be set on the pipeline on one side of the valve. Article 2.3.2 When the inspection well (room) that needs to be operated during an earthquake is adjacent to a dangerous building (referring to a building that lacks seismic resistance), the position of the well (room) should be adjusted or the seismic resistance of the building should be improved.
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Article 2.3.3 Gas valves that need to be operated during earthquakes should all have valve wells. The walls, covers and fixed brackets of the inspection wells (rooms) should be reinforced or replaced if they are cracked or severely corroded.
Article 2.3.4 Gas trunk lines and important branches with spigot-type joints should be equipped with flexible joints at the following locations:
1. Both sides of the pipeline crossing the river;
2. Both sides of the railway and important highways crossing; 3. The connection between the tee, cross, elbow accessories greater than 45 degrees and the straight section. Article 2.3.5 Gas trunk lines and important branches with spigot-type joints should be equipped with flexible joints within a certain length of the straight pipe section. The spacing of flexible interfaces shall be determined by earthquake-resistant calculation in accordance with the current national "Seismic Design Code for Outdoor Water Supply and Drainage and Gas Thermal Engineering".
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Chapter III Storage Tanks
Section I General Provisions
Article 3.1.1 The earthquake-resistant appraisal of storage tank facilities shall comply with the following provisions: 1. For equatorial spherical tanks, horizontal tanks, and vertical tanks, the strength of the supporting structure, the connection between the tank body and the support (pier), the support and the foundation, the rods, connectors, valves, pipelines and other parts prone to accidents shall be checked; 2. For water tank spiral rail and vertical rail gas storage tanks, the strength and structure of the guide wheel, guide rail (guide rail frame) shall be checked, and the operating conditions of the guide wheel, guide rail (guide rail frame) when the tower body is raised or lowered shall be checked.
Article 3.1.2 The valves installed on the storage tanks shall be flexible to open and close, the instruments shall be accurate and reliable, and the installation shall be firm.
Article 3.1.3 The supporting structures of equatorial spherical tanks and horizontal tanks and the guide wheels and guide rails of water tank spiral rail gas storage tanks shall be verified for seismic strength in accordance with the current national "Seismic Design Code for Outdoor Water Supply and Drainage and Gas Thermal Engineering". If the requirements are not met, they shall be reinforced. Article 3.1.4 In the liquefied petroleum gas storage tank area, a liquid-proof dike shall be set up to control the scope of the accident. When the seismic appraisal reinforcement intensity is 7 degrees and 8 degrees and the foundation soil is a liquefiable main section and 9 degrees and the site soil is Class III, a reinforced concrete liquid-proof dike should be built. Liquefied petroleum gas storage tanks must be equipped with safety valves and vent pipes. Section 2 Equatorial spherical tanks, horizontal tanks, and vertical tanks Article 3.2.1 The supporting structure of equatorial spherical tanks, horizontal tanks, and vertical tanks shall meet the following requirements:
1. The rods and connectors shall not be seriously rusted, welded, or deformed, and the bolts and nuts shall not be damaged or loose;
2. When the seismic appraisal reinforcement intensity is 9 degrees, the horizontal tank shall have a saddle support, and the support shall be connected to the pier with bolts (one end is fixed and the other end is slidable);
3. The pier shall not have obvious defects or cracks;
4. The floating vertical tank shall be stabilized. If it does not meet the above requirements, it shall be reinforced or replaced. Article 3.2.2 When the connecting platform between tanks is fixed on the tank body at both ends, one end shall be changed to a movable support. Article 3.2.3 For equatorial spherical tanks located on Class II sites, when the foundation under the pillar is set separately, the foundations should be connected with connecting beams or other effective reinforcement measures should be taken.
Article 3.2.4 When the seismic appraisal reinforcement intensity is 7 degrees, 8 degrees and the foundation soil is a liquefiable soil section and 9 degrees and the site soil is Class III, elbow compensation or other flexible connections should be set on the gas and liquid phase pipes of the equatorial spherical tank. Section 3 Water Trough Gas Storage Tanks
Article 3.3.1 Water Trough Spiral Rail and Vertical Rail Gas Storage Tanks shall meet the following requirements:
1. When the tower body is raised or lowered, the guide wheel and guide rail (guide rail frame) shall be flexible and reliable, and the meshing shall be uniform.
2. The shaft seat of each set of guide wheels shall have a good overall structure; 3. The angle steel connecting the upper hanging ring and the guide rail extending from it shall be welded firmly; 4. The water trough shall be free of serious corrosion and leakage. If it does not meet the above requirements, it should be reinforced or replaced. Article 3.3.2 When the capacity of the water tank type spiral rail gas storage tank is equal to or greater than 5000m3 and the guide rail is less than 24 kg/m light rail, the section of the guide rail extending from the upper hanging ring should be increased.
Engineering Construction Standard Full Text Information System
W.bzsoso.cOm1. Steel pipes are suitable for gas trunk lines with liquefiable soil as foundation. For gas trunk lines passing through seismic fault zones and liquefiable soil sections, valves should be added at both ends, and flexible interfaces should be set on the pipeline on one side of the valve. Article 2.3.2 When the inspection well (room) that needs to be operated during an earthquake is adjacent to a dangerous building (referring to a building that lacks earthquake resistance), the position of the well (room) should be adjusted or the earthquake resistance of the building should be improved.
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Article 2.3.3 Gas valves that need to be operated during an earthquake should all have valve wells. The walls, covers and fixed brackets of the inspection well (room) should be reinforced or replaced if they are cracked or severely corroded.
Article 2.3.4 Gas trunk lines and important branches with spigot-and-socket joints shall be provided with flexible joints at the following locations:
1. Both sides of the pipelines crossing the river;
2. Both sides of the pipelines crossing the railway and important highways; 3. The connection between the tee, cross, elbow accessories greater than 45 degrees and the straight section. Article 2.3.5 Gas trunk lines and important branches with spigot-and-socket joints shall be provided with flexible joints within a certain length of the straight section. The spacing of the flexible joints shall be determined by earthquake resistance calculation in accordance with the current national "Seismic Design Code for Outdoor Water Supply and Drainage and Gas Thermal Engineering".
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter III Storage Tanks
Section I General Provisions
Article 3.1.1 The seismic appraisal of storage tank facilities shall comply with the following provisions: 1. For equatorial spherical tanks, horizontal tanks, and vertical tanks, the strength of the supporting structure, the connection between the tank body and the support (pier), the support and the foundation, the rods, connectors, valves, pipes and other parts prone to accidents shall be checked; 2. For water tank type spiral rail and vertical rail gas storage tanks, the strength and structure of the guide wheel, guide rail (guide rail frame) shall be checked, and the running condition of the guide wheel, guide rail (guide rail frame) when the tower body is raised or lowered shall be checked.
Article 3.1.2 The valves installed on the storage tanks shall be flexible to open and close, the instruments shall be accurate and reliable, and the installation shall be firm.
Article 3.1.3 The supporting structures of equatorial spherical tanks and horizontal tanks and the guide wheels and guide rails of water tank spiral rail gas storage tanks shall be verified for seismic strength in accordance with the current national "Seismic Design Code for Outdoor Water Supply and Drainage and Gas Thermal Engineering". If the requirements are not met, they shall be reinforced. Article 3.1.4 In the liquefied petroleum gas storage tank area, a liquid-proof dike shall be set up to control the scope of the accident. When the seismic appraisal reinforcement intensity is 7 degrees and 8 degrees and the foundation soil is a liquefiable main section and 9 degrees and the site soil is Class III, a reinforced concrete liquid-proof dike should be built. Liquefied petroleum gas storage tanks must be equipped with safety valves and vent pipes. Section 2 Equatorial spherical tanks, horizontal tanks, and vertical tanks Article 3.2.1 The supporting structure of equatorial spherical tanks, horizontal tanks, and vertical tanks shall meet the following requirements:
1. The rods and connectors shall not be seriously rusted, welded, or deformed, and the bolts and nuts shall not be damaged or loose;
2. When the seismic appraisal reinforcement intensity is 9 degrees, the horizontal tank shall have a saddle support, and the support shall be connected to the pier with bolts (one end is fixed and the other end is slidable);
3. The pier shall not have obvious defects or cracks;
4. The floating vertical tank shall be stabilized. If it does not meet the above requirements, it shall be reinforced or replaced. Article 3.2.2 When the connecting platform between tanks is fixed on the tank body at both ends, one end shall be changed to a movable support. Article 3.2.3 For equatorial spherical tanks located on Class II sites, when the foundation under the pillar is set separately, the foundations should be connected with connecting beams or other effective reinforcement measures should be taken.
Article 3.2.4 When the seismic appraisal reinforcement intensity is 7 degrees, 8 degrees and the foundation soil is a liquefiable soil section and 9 degrees and the site soil is Class III, elbow compensation or other flexible connections should be set on the gas and liquid phase pipes of the equatorial spherical tank. Section 3 Water Trough Gas Storage Tanks
Article 3.3.1 Water Trough Spiral Rail and Vertical Rail Gas Storage Tanks shall meet the following requirements:
1. When the tower body is raised or lowered, the guide wheel and guide rail (guide rail frame) shall be flexible and reliable, and the meshing shall be uniform.
2. The shaft seat of each set of guide wheels shall have a good overall structure; 3. The angle steel connecting the upper hanging ring and the guide rail extending from it shall be welded firmly; 4. The water trough shall be free of serious corrosion and leakage. If it does not meet the above requirements, it should be reinforced or replaced. Article 3.3.2 When the capacity of the water tank type spiral rail gas storage tank is equal to or greater than 5000m3 and the guide rail is less than 24 kg/m light rail, the section of the guide rail extending from the upper hanging ring should be increased.
Engineering Construction Standard Full Text Information System
W.bzsoso.cOm1. Steel pipes are suitable for gas trunk lines with liquefiable soil as foundation. For gas trunk lines passing through seismic fault zones and liquefiable soil sections, valves should be added at both ends, and flexible interfaces should be set on the pipeline on one side of the valve. Article 2.3.2 When the inspection well (room) that needs to be operated during an earthquake is adjacent to a dangerous building (referring to a building that lacks earthquake resistance), the position of the well (room) should be adjusted or the earthquake resistance of the building should be improved.
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Article 2.3.3 Gas valves that need to be operated during an earthquake should all have valve wells. The walls, covers and fixed brackets of the inspection well (room) should be reinforced or replaced if they are cracked or severely corroded.
Article 2.3.4 Gas trunk lines and important branches with spigot-and-socket joints shall be provided with flexible joints at the following locations:
1. Both sides of the pipelines crossing the river;
2. Both sides of the pipelines crossing the railway and important highways; 3. The connection between the tee, cross, elbow accessories greater than 45 degrees and the straight section. Article 2.3.5 Gas trunk lines and important branches with spigot-and-socket joints shall be provided with flexible joints within a certain length of the straight section. The spacing of the flexible joints shall be determined by earthquake resistance calculation in accordance with the current national "Seismic Design Code for Outdoor Water Supply and Drainage and Gas Thermal Engineering".
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter III Storage Tanks
Section I General Provisions
Article 3.1.1 The seismic appraisal of storage tank facilities shall comply with the following provisions: 1. For equatorial spherical tanks, horizontal tanks, and vertical tanks, the strength of the supporting structure, the connection between the tank body and the support (pier), the support and the foundation, the rods, connectors, valves, pipes and other parts prone to accidents shall be checked; 2. For water tank type spiral rail and vertical rail gas storage tanks, the strength and structure of the guide wheel, guide rail (guide rail frame) shall be checked, and the running condition of the guide wheel, guide rail (guide rail frame) when the tower body is raised or lowered shall be checked.
Article 3.1.2 The valves installed on the storage tanks shall be flexible to open and close, the instruments shall be accurate and reliable, and the installation shall be firm.
Article 3.1.3 The supporting structures of equatorial spherical tanks and horizontal tanks and the guide wheels and guide rails of water tank spiral rail gas storage tanks shall be verified for seismic strength in accordance with the current national "Seismic Design Code for Outdoor Water Supply and Drainage and Gas Thermal Engineering". If the requirements are not met, they shall be reinforced. Article 3.1.4 In the liquefied petroleum gas storage tank area, a liquid-proof dike shall be set up to control the scope of the accident. When the seismic appraisal reinforcement intensity is 7 degrees and 8 degrees and the foundation soil is a liquefiable main section and 9 degrees and the site soil is Class III, a reinforced concrete liquid-proof dike should be built. Liquefied petroleum gas storage tanks must be equipped with safety valves and vent pipes. Section 2 Equatorial spherical tanks, horizontal tanks, and vertical tanks Article 3.2.1 The supporting structure of equatorial spherical tanks, horizontal tanks, and vertical tanks shall meet the following requirements:
1. The rods and connectors shall not be seriously rusted, welded, or deformed, and the bolts and nuts shall not be damaged or loose;
2. When the seismic appraisal reinforcement intensity is 9 degrees, the horizontal tank shall have a saddle support, and the support shall be connected to the pier with bolts (one end is fixed and the other end is slidable);
3. The pier shall not have obvious defects or cracks;
4. The floating vertical tank shall be stabilized. If it does not meet the above requirements, it shall be reinforced or replaced. Article 3.2.2 When the connecting platform between tanks is fixed on the tank body at both ends, one end shall be changed to a movable support. Article 3.2.3 For equatorial spherical tanks located on Class II sites, when the foundation under the pillar is set separately, the foundations should be connected with connecting beams or other effective reinforcement measures should be taken.
Article 3.2.4 When the seismic appraisal reinforcement intensity is 7 degrees, 8 degrees and the foundation soil is a liquefiable soil section and 9 degrees and the site soil is Class III, elbow compensation or other flexible connections should be set on the gas and liquid phase pipes of the equatorial spherical tank. Section 3 Water Trough Gas Storage Tanks
Article 3.3.1 Water Trough Spiral Rail and Vertical Rail Gas Storage Tanks shall meet the following requirements:
1. When the tower body is raised or lowered, the guide wheel and guide rail (guide rail frame) shall be flexible and reliable, and the meshing shall be uniform.
2. The shaft seat of each set of guide wheels shall have a good overall structure; 3. The angle steel connecting the upper hanging ring and the guide rail extending from it shall be welded firmly; 4. The water trough shall be free of serious corrosion and leakage. If it does not meet the above requirements, it should be reinforced or replaced. Article 3.3.2 When the capacity of the water tank type spiral rail gas storage tank is equal to or greater than 5000m3 and the guide rail is less than 24 kg/m light rail, the section of the guide rail extending from the upper hanging ring should be increased.
Engineering Construction Standard Full Text Information System
W.bzsoso.cOm1. The trough-type spiral rail and vertical rail gas storage tanks shall meet the following requirements:
1. When the tower body is raised or lowered, the guide wheels, guide rails (guide rail frames) shall be flexible and reliable, and the meshing shall be uniform.
2. The axle seat of each set of guide wheels shall have a good overall structure; 3. The angle steel connecting the upper hanging ring and the guide rail extending from it shall be welded firmly; 4. The trough shall be free of serious corrosion and leakage. If the above requirements are not met, it shall be reinforced or replaced. Article 3.3.2 When the capacity of the trough-type spiral rail gas storage tank is equal to or greater than 5000 m3 and the guide rail is less than 24 kg/m light rail, the cross-section of the guide rail extending from the upper hanging ring shall be increased.
Engineering Construction Standard Full-text Information System
W.bzsoso.cOm1. The trough-type spiral rail and vertical rail gas storage tanks shall meet the following requirements:
1. When the tower body is raised or lowered, the guide wheels, guide rails (guide rail frames) shall be flexible and reliable, and the meshing shall be uniform.
2. The axle seat of each set of guide wheels shall have a good overall structure; 3. The angle steel connecting the upper hanging ring and the guide rail extending from it shall be welded firmly; 4. The trough shall be free of serious corrosion and leakage. If the above requirements are not met, it shall be reinforced or replaced. Article 3.3.2 When the capacity of the trough-type spiral rail gas storage tank is equal to or greater than 5000 m3 and the guide rail is less than 24 kg/m light rail, the cross-section of the guide rail extending from the upper hanging ring shall be increased.
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