1 General Provisions
1.0.1 This code is formulated with a view to controlling the construction and acceptance behavior of chimney engineering, ensuring the construction quality of chimney engineering and achieving state-of-art technology, safe and applicable, and economy and rationality.
1.0.2 This code is applicable to the construction and acceptance of the masonry chimney, reinforced concrete chimney and steel chimney engineering.
1.0.3 The chimney engineering shall be constructed according to design documents.
1.0.4 The new technologies shall be positively adopted in the construction of chimney. The new technologies shall pass the test and verification and shall not be popularized or used until the specific regulations are formulated.
1.0.5 The construction and acceptance of chimney engineering shall not only comply with this code, but also shall comply with those specified in the in the current relevant standards of the nation.
2 Terms
2.0.1 Confining bed
It refers to the part of outermost layer in the brick inside tube of telescope-feed and multibarrel chimney, which is used for sealing the flue gas.
2.0.2 Inside tube
It refers to the smoke emission canister in the telescope-feed and multibarrel chimney shaft.
2.0.3 Warning sign
It refers to the aviation obstacle light and color codes used for marking the outline and height of high structures or high-rise buildings and have warning actions on aerocrafts.
2.0.4 Hydraulic sliding form
It refers to the process of lifting the working platform, sliding shuttering, and serial construction by adopting electromotor or hydraulic jack with the embedded stand bars in tube (wall) wall as supporting points.
2.0.5 Motor-driven (hydraulic) promote form
It refers to the process of lifting the working platform, formwork, reverse mould and intermittent construction by adopting electromotor or hydraulic jack with the preformed holes on tube (wall) wall or the embedded support as supporting points.
2.0.6 Two-side sliding form
It refers to the process by carrying out the constructions of tube wall and the lining hydraulic sliding form simultaneously.
2.0.7 Hydraulic jacking
It refers to the method of installing the steel chimney or steel inside tube from top to bottom in segments (sections) by adopting hydraulic jacking device.
2.0.8 Hydraulic lifting
It refers to the method of installing the steel chimney or steel inside tube from top to bottom in segments (sections) by adopting hydraulic lifting device.
2.0.9 Pneumatic jacking
It refers to the method of installing the steel chimney or steel inside tube from top to bottom in segments (sections) by adopting air pressure jacking device.
3 Basic Provisions
3.0.1 In the construction projects, the chimneys may be divided into unit engineering or subunit engineering. The partitioned project chimney may be divided according to the foundation, tube body, chimney platform, corrosion protection of chimney, and ancillary works. Framed steel chimney may be divided into such two partitioned projects as tower and tube body. The tube body may be divided into several sub-partitioned projects according to the different types of chimney. When one partitioned project includes only one subdivisional work, this subdivisional work shall be partitioned project.
Table 3.0.1 Division of Chimney Engineering into Partitioned Project, Sub-partitioned Project and Subdivisional Work
3.0.2 The subdivisional work of chimney shall be composed of one or several inspection lots, and the inspection of each subdivisional work shall be divided according to the relevant regulations specified in this code.
3.0.3 The acceptable quality level of inspection lot shall meet the following requirements:
1 The quality of dominant item shall comply with the relevant regulations specified in this code. When the inspection quantity is not noticed, the dominant items shall be wholly inspected;
2 The quality of general items shall be qualified through the sampling inspection. When adopting counting inspection, except for special provisions, the inspection result shall be that 80% or above shall comply with the requirements on the acceptable quality level specified in this code and shall not be with critical defect or the maximum deviation shall not exceed 1.2 times of the permissible variation value;
3 It shall be with such data as intact construction operating criteria, quality inspection record file and certificate documents.
3.0.4 The acceptable quality level of subdivisional work shall meet the following requirements:
1 The inspection lots contained in the subdivisional work all shall comply with the provisions on specified quality;
2 The quality control data shall be intact.
3.0.5 The acceptable quality level of partitioned and sub-partitioned projects shall meet the following requirements:
1 The quality of the subdivisional works included in the partitioned and sub-partitioned projects all shall be qualified in the acceptance inspection;
2 The quality control data shall be intact;
3 The relevant inspections on safety and functions and the sampling inspection results shall comply with the relevant regulations specified in this code;
4 The impression quality acceptance shall meet the requirements.
3.0.6 The acceptable quality level of chimney engineering shall meet the following requirements:
1 The quality of the partitioned and sub-partitioned projects included in the chimney engineering all shall be qualified in the acceptance inspection;
2 The quality control data shall be intact;
3 The relevant data of the safety and function inspections of partitioned and sub-partitioned projects included in the chimney engineering shall be intact;
4 The impression quality acceptance shall meet the requirements.
3.0.7 When the quality of chimney engineering fails to meet the requirement, it shall be disposed according to the following requirements:
1 After remanufacturing or replacing the apparatus, the inspection lot of equipments shall be inspected for acceptance again;
1 General Provisions
2 Terms
3 Basic Provisions
4 Foundation
4.1 Earthwork and Foundation Pit Engineering
4.2 Reinforcing Work
4.3 Formwork
4.4 Concrete Works
4.5 Quality Inspection
5 Tube Wall of Masonry Chimney
5.1 General Provisions
5.2 Masonry Engineering
5.3 Quality Inspection
6 Tube Wall of Reinforced Concrete Chimney
6.1 General Provisions
6.2 Reinforcing Work
6.3 Formwork Engineering
6.4 Concrete Works
6.5 Quality Inspection
7 Steel Chimney and Steel Inside Tube
7.1 General Provisions
7.2 Manufacturing and Pre-erecting Engineering of Steel Chimney and Steel Inside Tube
7.3 Welding Engineering
7.4 Installation Works of Steel Chimney and Steel inside Tube
7.5 Quality Inspection
8 Chimney Platform
8.1 Platform Manufacturing and Installation Work
8.2 Quality Inspection
9 Linings and Thermal-insulating Layers
9.1 General Provisions
9.2 Brick Linings (tubes) and Thermal-insulating Layers
9.3 Unshaped Material Lining
9.4 Quality Inspection
10 Anticorrosion of Chimney
10.1 General Provisions
10.2 Coating Anticorrosion
10.3 Soluble Glass Acid-proof Cement and Acid-proof Mortar Anticorrosion
10.4 Acid-proof Brick Anticorrosion
10.5 Soluble Glass Lightweight Acid-proof Concrete Anticorrosion
11 Ancillary Works
12 Winter Construction
12.1 General Provisions
12.2 Foundation
12.3 Masonry Stack Tube Wall
12.4 Tube Walls of the Reinforced Concrete Chimney
12.5 Steel Stack, Steel Inside Tube and Steel Member
12.6 Lining
13 Construction Safety
14 Acceptance of Construction Quality
15 Chimney Drying
Annex A Inspection Record of Quality Management on Construction Site
Annex B Quality Acceptance Record of Inspection Lot
Annex C Quality Acceptance Record of Subentry Project
Annex D Acceptance Record of Construction quality of Subsection (Sub-subsection)
Annex E Final Acceptance Record of Engineering Quality of Work Unit (Sub-work unit)
Wording Explanations
1 General Provisions
1.0.1 This code is formulated with a view to controlling the construction and acceptance behavior of chimney engineering, ensuring the construction quality of chimney engineering and achieving state-of-art technology, safe and applicable, and economy and rationality.
1.0.2 This code is applicable to the construction and acceptance of the masonry chimney, reinforced concrete chimney and steel chimney engineering.
1.0.3 The chimney engineering shall be constructed according to design documents.
1.0.4 The new technologies shall be positively adopted in the construction of chimney. The new technologies shall pass the test and verification and shall not be popularized or used until the specific regulations are formulated.
1.0.5 The construction and acceptance of chimney engineering shall not only comply with this code, but also shall comply with those specified in the in the current relevant standards of the nation.
2 Terms
2.0.1 Confining bed
It refers to the part of outermost layer in the brick inside tube of telescope-feed and multibarrel chimney, which is used for sealing the flue gas.
2.0.2 Inside tube
It refers to the smoke emission canister in the telescope-feed and multibarrel chimney shaft.
2.0.3 Warning sign
It refers to the aviation obstacle light and color codes used for marking the outline and height of high structures or high-rise buildings and have warning actions on aerocrafts.
2.0.4 Hydraulic sliding form
It refers to the process of lifting the working platform, sliding shuttering, and serial construction by adopting electromotor or hydraulic jack with the embedded stand bars in tube (wall) wall as supporting points.
2.0.5 Motor-driven (hydraulic) promote form
It refers to the process of lifting the working platform, formwork, reverse mould and intermittent construction by adopting electromotor or hydraulic jack with the preformed holes on tube (wall) wall or the embedded support as supporting points.
2.0.6 Two-side sliding form
It refers to the process by carrying out the constructions of tube wall and the lining hydraulic sliding form simultaneously.
2.0.7 Hydraulic jacking
It refers to the method of installing the steel chimney or steel inside tube from top to bottom in segments (sections) by adopting hydraulic jacking device.
2.0.8 Hydraulic lifting
It refers to the method of installing the steel chimney or steel inside tube from top to bottom in segments (sections) by adopting hydraulic lifting device.
2.0.9 Pneumatic jacking
It refers to the method of installing the steel chimney or steel inside tube from top to bottom in segments (sections) by adopting air pressure jacking device.
3 Basic Provisions
3.0.1 In the construction projects, the chimneys may be divided into unit engineering or subunit engineering. The partitioned project chimney may be divided according to the foundation, tube body, chimney platform, corrosion protection of chimney, and ancillary works. Framed steel chimney may be divided into such two partitioned projects as tower and tube body. The tube body may be divided into several sub-partitioned projects according to the different types of chimney. When one partitioned project includes only one subdivisional work, this subdivisional work shall be partitioned project.
Table 3.0.1 Division of Chimney Engineering into Partitioned Project, Sub-partitioned Project and Subdivisional Work
3.0.2 The subdivisional work of chimney shall be composed of one or several inspection lots, and the inspection of each subdivisional work shall be divided according to the relevant regulations specified in this code.
3.0.3 The acceptable quality level of inspection lot shall meet the following requirements:
1 The quality of dominant item shall comply with the relevant regulations specified in this code. When the inspection quantity is not noticed, the dominant items shall be wholly inspected;
2 The quality of general items shall be qualified through the sampling inspection. When adopting counting inspection, except for special provisions, the inspection result shall be that 80% or above shall comply with the requirements on the acceptable quality level specified in this code and shall not be with critical defect or the maximum deviation shall not exceed 1.2 times of the permissible variation value;
3 It shall be with such data as intact construction operating criteria, quality inspection record file and certificate documents.
3.0.4 The acceptable quality level of subdivisional work shall meet the following requirements:
1 The inspection lots contained in the subdivisional work all shall comply with the provisions on specified quality;
2 The quality control data shall be intact.
3.0.5 The acceptable quality level of partitioned and sub-partitioned projects shall meet the following requirements:
1 The quality of the subdivisional works included in the partitioned and sub-partitioned projects all shall be qualified in the acceptance inspection;
2 The quality control data shall be intact;
3 The relevant inspections on safety and functions and the sampling inspection results shall comply with the relevant regulations specified in this code;
4 The impression quality acceptance shall meet the requirements.
3.0.6 The acceptable quality level of chimney engineering shall meet the following requirements:
1 The quality of the partitioned and sub-partitioned projects included in the chimney engineering all shall be qualified in the acceptance inspection;
2 The quality control data shall be intact;
3 The relevant data of the safety and function inspections of partitioned and sub-partitioned projects included in the chimney engineering shall be intact;
4 The impression quality acceptance shall meet the requirements.
3.0.7 When the quality of chimney engineering fails to meet the requirement, it shall be disposed according to the following requirements:
1 After remanufacturing or replacing the apparatus, the inspection lot of equipments shall be inspected for acceptance again;
Contents of GB 50078-2008
1 General Provisions
2 Terms
3 Basic Provisions
4 Foundation
4.1 Earthwork and Foundation Pit Engineering
4.2 Reinforcing Work
4.3 Formwork
4.4 Concrete Works
4.5 Quality Inspection
5 Tube Wall of Masonry Chimney
5.1 General Provisions
5.2 Masonry Engineering
5.3 Quality Inspection
6 Tube Wall of Reinforced Concrete Chimney
6.1 General Provisions
6.2 Reinforcing Work
6.3 Formwork Engineering
6.4 Concrete Works
6.5 Quality Inspection
7 Steel Chimney and Steel Inside Tube
7.1 General Provisions
7.2 Manufacturing and Pre-erecting Engineering of Steel Chimney and Steel Inside Tube
7.3 Welding Engineering
7.4 Installation Works of Steel Chimney and Steel inside Tube
7.5 Quality Inspection
8 Chimney Platform
8.1 Platform Manufacturing and Installation Work
8.2 Quality Inspection
9 Linings and Thermal-insulating Layers
9.1 General Provisions
9.2 Brick Linings (tubes) and Thermal-insulating Layers
9.3 Unshaped Material Lining
9.4 Quality Inspection
10 Anticorrosion of Chimney
10.1 General Provisions
10.2 Coating Anticorrosion
10.3 Soluble Glass Acid-proof Cement and Acid-proof Mortar Anticorrosion
10.4 Acid-proof Brick Anticorrosion
10.5 Soluble Glass Lightweight Acid-proof Concrete Anticorrosion
11 Ancillary Works
12 Winter Construction
12.1 General Provisions
12.2 Foundation
12.3 Masonry Stack Tube Wall
12.4 Tube Walls of the Reinforced Concrete Chimney
12.5 Steel Stack, Steel Inside Tube and Steel Member
12.6 Lining
13 Construction Safety
14 Acceptance of Construction Quality
15 Chimney Drying
Annex A Inspection Record of Quality Management on Construction Site
Annex B Quality Acceptance Record of Inspection Lot
Annex C Quality Acceptance Record of Subentry Project
Annex D Acceptance Record of Construction quality of Subsection (Sub-subsection)
Annex E Final Acceptance Record of Engineering Quality of Work Unit (Sub-work unit)
Wording Explanations
