GBJ 94-1986 Spherical Storage Tank Construction and Acceptance Specification GBJ94-86 GBJ94-1986 Standard download decompression password: www.bzxz.net

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National Standard of the People's Republic of China
Specification for Construction and Acceptance of Spherical Storage Tanks
GBJ94-86
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National Standard of the People's Republic of China
Specification for Construction and Acceptance of Spherical Storage Tankswww.bzxz.net
94—86
Editor Department: Ministry of Petroleum Industry of the People's Republic of China Approval Department: China State Planning Commission of the People's Republic of China Effective date: January 1, 1987
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About the release of "Spherical Storage Tank Construction and Acceptance Specifications"
Ji Biao [1986] No. 962
According to the requirements of the former State Construction Commission (81) Jianfa Shezi No. 546, the "Spherical Storage Tank Construction and Acceptance Specifications" jointly compiled by the Ministry of Petroleum and relevant units has been reviewed by relevant departments. The "Spherical Storage Tank Construction and Acceptance Specifications" GBJ94-86 is now approved as a national standard and will be implemented from January 1, 1987. The Ministry of Petroleum is responsible for the management of this specification, and its specific interpretation is the responsibility of the Construction Technology Research Institute of the Ministry of Petroleum, and the basic construction standard quota research institute of our commission is responsible for publishing and issuing. State Planning Commission of the People's Republic of China June 9, 1986
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Preparation Instructions
This specification is compiled by the Ministry of Petroleum Industry in accordance with the requirements of the Notice No. 546 of the former State Construction Commission (81) Jianfashezi, and is jointly compiled by the "Spherical Storage Tank Construction and Acceptance Specification" Editorial Committee composed of the Ministry of Machinery Industry, Ministry of Metallurgical Industry, Ministry of Chemical Industry, Ministry of Urban and Rural Construction and Environmental Protection, Ministry of Textile Industry and China Petrochemical Corporation.
In the process of compilation, in the spirit of "advanced technology, economic rationality, safety and applicability, and quality assurance", based on the summary of my country's experience in manufacturing spherical storage tanks, with reference to advanced foreign standards, and widely soliciting opinions from relevant units across the country, after repeated discussions and revisions, it was finally reviewed and finalized by the Ministry of Petroleum Industry and relevant units across the country. This specification consists of nine chapters and four appendices, with the main contents including: general provisions, inspection and acceptance of parts and components, on-site assembly, welding, weld inspection, on-site post-weld overall heat treatment, product welding test plate inspection, pressure test and air tightness test, and acceptance inspection.
During the implementation of this specification, all units are requested to combine engineering practice and scientific research, and carefully summarize experience. If any modification or supplement is found, please send your opinions to the Construction Technology Research Institute of the Ministry of Petroleum (Tanggu, Tianjin) for reference in future revisions. Ministry of Petroleum Industry
April 1986
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Main Symbols
Chapter 1 General Provisions
Chapter 2
Inspection and Acceptance of Components
Section 1
General Provisions
Section 2
Section 3
Section 4
Section 5
Spherical Shell Plates
Painting, Packaging and Transportation of Product Components Chapter 3 On-site Assembly
Section 1
Section 2
Section 3|| tt||Section 4
General Provisions
Assembly of Spherical Tanks
Installation of Components
Inspection of Spherical Tank Dimensions
Chapter 4
Section 1
Section 2
Section 3
Section 4
Section 5
Welding Procedure Assessment
Qualification of Welders
Welding Requirements
Welding Construction of Spherical Tanks
Chapter 5 Inspection of Welds
Section 1
Section 2
Section 3
Section 4
Visual Inspection of Welds
Qualification of Nondestructive Testing Personnel
Radiographic and ultrasonic testing
Magnetic particle testing and penetrant testing
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Section V Re-inspection
Chapter VI On-site post-weld overall heat treatment
Section 1 General provisions ·
Section 2 Heat treatment process
Section 3
Section 4
Section 5
Insulation requirements
Temperature measurement system
Column foot treatment
Chapter 7 Inspection of product welding test plates
Preparation requirements for product welding test plates
Section 1
Section 2||tt| |Test requirements for specimens
Chapter VIII
Pressure test and airtightness test
Section I
Section II
Chapter IX
Appendix—
Appendix II
Appendix III
Pressure test
Airtightness test
Completion acceptance
Terminology explanation
Window-shaped restrained crack test
Completion acceptance form
Appendix 3.1 Completion acceptance certificate for spherical tank project Appendix 3.2
Appendix 3.3
Appendix 3.4
Appendix 3.5
Spherical tank foundation inspection record||tt| |Welding process data
Spherical tank geometry inspection report
Spherical tank support inspection record
Appendix 3.6.1
Appendix 3.6.2
Appendix 3.7
Appendix 3.8
Appendix 3.9
Appendix 3.10
Appendix 3.11
Weld seam radiographic flaw detection report
Weld seam radiographic flaw detection record
Weld seam ultrasonic flaw detection report
Weld seam magnetic particle flaw detection report
Weld seam penetrant flaw detection report
Welding repair record
Spherical tank heat treatment process report
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Appendix 3.12
Appendix 3.13
Foundation Settlement Observation Record.
Spherical Tank Pressure Test Report…
Appendix 3.14
4Spherical Tank Air Tightness Test Report
5Product Welding Test Plate Test Report
Appendix 3.15
Appendix IV Explanation of Terms Used in This Code
Additional Explanation
List of the Editor-in-Chief, Participating Units and Main Drafters of This Code....
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Main Important symbols
Chord length in any width direction
bi, b2, b3
Designed inner diameter of spherical tank
Diameter of foundation center circle
Outer diameter of flange
Misalignment of the joints
Angular deformation
Height of pillar
Welding current
Chord length of spherical shell plate
Chord length in length direction
Chord length of diagonal line
Radial distance between spherical shell and sample at maximum angular deformationRadial distance between standard spherical shell and sample
Welding line energy
Specified inner or outer radius of spherical shell
R sample
Radius of curvature of sample
Adjacent Center distance of pillar foundation
The distance between the center of the anchor bolt on the pillar foundation and the center circle of the foundationThe distance between the center of the anchor bolt reserved hole on the pillar foundation and the center circle of the foundationArc voltage
Welding speed
Groove angle
8, 81, 82Thickness of spherical shell plate
△Vertical deviation of spherical tank pillar
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Chapter 1 General
Article 1.0.1 This specification applies to the construction and acceptance of welded spherical storage tanks made of carbon steel and low alloy steel (hereinafter referred to as spherical tanks) with a design temperature higher than -20℃ and a wall thickness less than or equal to 50mm.
This specification does not apply to the following spherical tanks:
1. Spherical tanks for nuclear industry;
2. Non-fixed (such as vehicle-mounted or ship-mounted) spherical tanks;3. Spherical tanks with double-layer structures.
Article 1.0.2 For liquefied petroleum gas spherical tanks, when the design temperature is lower than or equal to -20°C, if the stress (overall primary membrane stress) under the shell working condition is not greater than 1/6 of the yield strength of the selected material, it can be treated as a normal temperature spherical tank. Article 1.0.3 The spherical tank should be constructed according to the design. If the design drawing needs to be modified, the original design unit must agree and sign the design change document. Article 1.0.Article 4 In addition to complying with the provisions of this specification, the construction and acceptance of spherical tanks shall also comply with the provisions of the current national standards and specifications. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Inspection and Acceptance of Components
Chapter II
Section I General Provisions
Article 2.1.1 The factory certificates of spherical tank shell plates, manhole flanges, pipe connections, reinforcement rings, supports and tie rods and other components shall include the following contents: 1. Factory certificate of spherical tank components;
2. Material substitution approval procedures;
3. Various material quality certificates and re-inspection reports of spherical shell plate materials; 4. Ultrasonic flaw detection report of steel plates; flaw detection records of roughness and parts; 5. Ultrasonic flaw detection report of spherical shell plate periphery; 6. Non-destructive flaw detection report of grooves and welds (including flaw detection location map); 7. Forming test plate inspection report;
8. Welding test plate test report.
Section 2 Materials
Article 2.2.1 The materials used for the pressure parts and pillars of the spherical tank shall meet the design requirements. The welding performance of the materials of the non-pressure parts of the spherical tank shall be compatible with the spherical shell plate materials. Article 2.2.2 A formed test plate shall be taken from each product for tensile, bending and room temperature impact tests. The test plate is cut from the formed spherical shell plate, and its cutting direction shall be consistent with the sampling direction of the steel plate.
Article 2.2.3 The steel plates used for the spherical shell plate shall be ultrasonically inspected according to the design requirements. Carbon steel plates shall meet the Level III requirements specified in "Ultrasonic Flaw Detection of Steel Plates for Pressure Vessels" (JB115073); low alloy steel plates shall meet the Level II requirements. Article 2.2.4 Forgings for pressure-bearing components such as shell flanges and manhole reinforcement rings shall comply with the requirements for Grade 2 forgings specified in the Technical Conditions for Pressure Vessel Forgings (JB755-85).
Section 3 Spherical Shell Plates
Article 2.3.1 The structural type of the spherical shell shall comply with the design requirements. Each spherical shell plate shall not be spliced.
Article 2.3.2 The spherical shell plates provided by the manufacturer shall have good surface quality, and defects exceeding the standard shall be repaired in accordance with the provisions of Chapter 4, Section 5 of this Code. Article 2.3.3 The actual measured thickness of the spherical shell plate shall not be less than the sum of the design thickness minus the negative deviation of the steel plate and the processing thinning amount.
Article 2.3.4 The external dimensions of the spherical shell plate shall meet the following requirements: 1. When checking the curvature of the spherical shell plate with a template, its allowable deviation shall meet the requirements of Table 2.3.4-1 (Figure 2.3.4-1~2). Allowable deviation of spherical shell plate curvature
Spherical shell plate chord length L (m) Chord length of the template to be used (m) L>2
Table 2.3.4-1
Allowable clearance E (mm) at any part
2. The allowable deviation of geometric dimensions shall meet the requirements of Table 2.3.4-2 (Figure 2.3. 4-3~4).
Allowable deviation of geometric dimensions of spherical shell plate
Chord length L1 in length direction
Chord length b1, b2, b3 in arbitrary width direction
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Table 2.3.4-2
Allowable deviation (mm)
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Diagonal chord length L2
Distance between two diagonals
2.3.4-2
Allowable deviation (mm)
Note: For spherical shell plates with thin walls and poor rigidity, the arc length can be checked. Its allowable deviation should comply with the provisions of 1, 2 and 3 in Table 2.3.4-2.
Figure 2.3.4—1
Permissible deviation of curvature of spherical shell plate
Analysis of Social Min
Figure 2.3.4—2 Permissible deviation of curvature of spherical shell plate Engineering Construction Standard Full Text Information System
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