This standard is the first part of "Road Transport Tank Vehicles for Liquid Dangerous Goods", which specifies the technical requirements for the design, manufacture, test methods, factory inspection, painting and marking, and regular inspection items of metal atmospheric pressure tanks of road transport tank vehicles for liquid dangerous goods. It is applicable to tanks with liquid dangerous goods as the transport medium, working pressure less than 0.1MPa, made of metal materials and permanently connected to the standard automobile chassis or semi-trailer frame. GB 18564.1-2006 Road Transport Tank Vehicles for Liquid Dangerous Goods Part 1: Technical Requirements for Metal Atmospheric Pressure Tanks GB18564.1-2006 Standard download decompression password: www.bzxz.net
This standard is the first part of "Road Transport Tank Vehicles for Liquid Dangerous Goods", which specifies the technical requirements for the design, manufacture, test methods, factory inspection, painting and marking, and regular inspection items of metal atmospheric pressure tanks of road transport tank vehicles for liquid dangerous goods. It is suitable for tanks with liquid dangerous goods as the transport medium, working pressure less than 0.1MPa, made of metal materials and permanently connected to the standard automobile chassis or semi-trailer frame.

ICS43.080.10;13.300
National Standard of the People's Republic of China
GB18564.1—2006
Partially replaces GB18564—2001
Road tanker for dangerous liquid goods transportation-Part 1:Technical requirements of atmospheric pressure metal tank2006-07-19Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Standardization Administration of the People's Republic of China
2006-11-01Implementation
GB 18564.1—2006
Normative reference documents
Terms and definitions
Manufacture·
Test methods
Factory inspection·
Painting and markings and identification
Factory documents
Periodic inspection
Common liquid dangerous goods media and main design parameters Appendix A (normative appendix)
Appendix B (informative appendix)
Appendix C (informative appendix)
Appendix D (normative appendix)
Compatibility of common liquid dangerous goods media with tank materials Design and calculation of safe relief devices
Tank body with non-circular cross-section
GB18564 "Road Transport of Liquid Dangerous Goods Tank Vehicles" is divided into 2 parts: Part 1: Technical requirements for metal atmospheric pressure tank bodies; Part 2: Technical requirements for non-metallic atmospheric pressure tank bodies. This part is the first part of GB18564 "Road Transport of Dangerous Liquid Goods Tank Vehicles". GB18564.1-2006
This part replaces the metal tank part of GB18564-2001 "General Technical Requirements for Atmospheric Pressure Containers (Tanks) for Transporting Dangerous Liquid Goods by Automobile".
Before the release and implementation of GB18564.2 "Road Transport of Dangerous Liquid Goods Tank Vehicles Part 2: Technical Requirements for Non-metallic Atmospheric Pressure Tanks", non-metallic atmospheric pressure tanks shall still comply with the relevant provisions of the original GB18564-2001. Compared with GB18564-2001, this part has the following major changes: the name of the standard has been changed from "General Technical Requirements for Atmospheric Pressure Containers (Tanks) for Transporting Liquid Dangerous Goods by Automobile" to "Road Transport of Liquid Dangerous Goods Tank Vehicles Part 1: Technical Requirements for Metal Atmospheric Pressure Tanks"; added safety technical requirements for transporting highly toxic media: the upper limit of working pressure has been changed from \0.072MPa" to "less than 0.1MPa", and a chapter on terms and definitions has been added;
a chapter on design has been added, stipulating design requirements for tank materials and structures; in the chapter on manufacturing, the requirements for tank molding and deviations have been supplemented; the requirements for factory inspection have been modified;
a chapter on periodic inspection of tanks has been added;
Appendix A "Common Liquid Dangerous Goods Media and Their Main The original Appendix A "Compatibility of liquid dangerous goods with tank materials" was changed to Appendix B "Compatibility of common liquid dangerous goods media with tank materials";
The original Appendix B "Registration form for annual inspection results of dangerous goods at normal pressure" (suggestive appendix) was cancelled. Appendices B and C of this part are recommended, and the rest are mandatory. This part was proposed by the National Technical Committee for Standardization of Boiler and Pressure Vessels (SAC/TC262). This part is under the jurisdiction of the National Technical Committee for Standardization of Boiler and Pressure Vessels (SAC/TC262). This part is under the jurisdiction of the Mobile Pressure Vessel Subcommittee of the National Technical Committee for Standardization of Boiler and Pressure Vessels (SAC/TC262 /SC4) organized the drafting.
The main drafting units of this part are: CIMC Vehicle (Group) Co., Ltd., Shanghai Chemical Equipment Co., Ltd., China Petrochemical Corporation Economic and Technological Research Institute, Yangzhou CIMC Tonghua Special Vehicle Co., Ltd., Nantong CIMC Tank Transport Equipment Manufacturing Co., Ltd., Jingmen Hongtu Special Aircraft Manufacturing Co., Ltd., Harbin Jiancheng North Special Vehicle Co., Ltd., Nanjing Aerospace Chenguang Co., Ltd., Sinochem International (Holdings) Co., Ltd., Shanghai Huoyeshi Nobak Transport Co., Ltd. The main drafters of this part are: Liu Hongqing, Zhou Weiming, Shou Binan, Ma Kai, Sun Hongli, Sun Taiping, Luo Yongxin, Xu Ziping, Zhang Jie, Wang Weiguo, Chen Zhaohui, Zou Zhiqiang, Li Jun, Liu Chao. This part was first issued in 2001 and revised for the first time in 2006 . 1 Scope
Road transport of liquid dangerous goods tank vehicles Part 1: Technical requirements for metal atmospheric pressure tank bodies GB18564.1—2006
1.1 This part specifies the technical requirements for the design, manufacture, test methods, factory inspection, painting and marking and identification, and periodic inspection items of metal atmospheric pressure tank bodies (hereinafter referred to as tank bodies) of road transport of liquid dangerous goods tank vehicles. 1.2 This part is applicable to tank bodies whose transported medium is liquid dangerous goods, whose working pressure is less than 0.1MPa, are made of metal materials, and are permanently connected to the standard automobile chassis or semi-trailer frame. 1.3 This part is applicable to the media in Appendix A. For media beyond the scope of Appendix A, this part can be referred to when their physical and chemical properties are similar to those of the media in Appendix A. 1.4 This part is not applicable to tank bodies made of non-metallic materials, vacuum insulation structure tank bodies, or tank bodies for military equipment with special requirements. 1.5 For tanks that cannot be designed using this part, the following design methods are allowed, but they must be evaluated and approved by units recognized by the national competent authorities:
Stress analysis including finite element method; - Confirmatory experimental analysis (such as experimental stress analysis, confirmatory hydraulic test); comparative empirical design using comparable structures that have been put into use. 2 Normative references
The clauses in the following documents become clauses of this part through reference to this part of GB/T18564. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions apply to this part.
GB150 Steel pressure vessels
GB/T3730.12001 Terms and definitions of motor vehicle and trailer types GB/T3730.2--1996 Vocabulary and code for road vehicle quality (idtISO1176:1990) GB6944-2005
Classification and product name numbering of dangerous goods
9 Seamless steel pipes for conveying fluids (neqISO559:1991) GB/T8163-1999
GB 9969.1—1998Www.bzxZ.net
GB12268—2005
GB13365—2005
General rules for instructions for use of industrial products
List of dangerous goods
Motor vehicle exhaust spark arrester
GB13392—2005
5 Vehicle marking for road transport of dangerous goods
GB/T14976-2002 Seamless stainless steel pipes for fluid transportation GB20 300—2006 Technical safety requirements for road transport of explosives and highly toxic chemicals JB4708 Welding procedure assessment for steel pressure vessels JB/T4711 Coating and transport packaging for pressure vessels JB4726 Carbon steel and low alloy steel forgings for pressure vessels Low alloy steel forgings for cryogenic pressure vessels
JB4727
JB4728 Stainless steel forgings for pressure vessels
JB/T4730.2 Nondestructive testing of pressure equipment Part 2: Radiographic testing GB18564.1—2006
JB/T4730.3
JB/T4730.4
Non-destructive testing of pressure equipment Part 3: Ultrasonic testingNon-destructive testing of pressure equipment Part 4: Magnetic particle testingJB/T4730.5 yuan
Non-destructive testing of pressure equipment Part 5: Penetrant testingJB/T4734
Aluminum welded container
JB/T4735
JB/T47 46
JB/T4747
Steel welded atmospheric pressure vessels
Heads for steel pressure vessels
Technical conditions for ordering steel welding rods for pressure vesselsQC/T653—2000Technical conditions for oil tankers and refueling trucksHG20660—2000Classification of toxic hazards and explosion hazards of chemical media in pressure vesselsHG/T20678—2000Technical regulations for the design of lined steel shells3Terms and definitions
GB/T3730.1. The terms and definitions established in GB/T3730.2, JB/T4734, JB/T4735 and the following terms and definitions apply to this part. 3.1
Pressure
Except where otherwise specified, pressure refers to gauge pressure. 3.2
Calculating pressure
refers to the pressure used to determine the thickness of tank components at the corresponding design temperature, which includes the static pressure of the liquid column and dynamic load, etc. When the static pressure of the liquid column borne by the component is less than 5% of the design pressure, the static pressure of the liquid column can be ignored, and the unit is MPa. 3.3
Tank body
refers to a closed container composed of a cylinder, a head, a manhole, a nozzle and a loading and unloading port. 3.4
Safety attachments
refers to the general term for the accessories that can play a safety protection role, such as the safety relief device (breathing valve, safety valve, bursting disc device, safety valve and bursting disc series combination device and discharge system, etc.), emergency shut-off device, liquid level measuring device, pressure measuring device, temperature measuring device and static electricity conductive device installed on the tank body.
Venting system
refers to the protective device set up for emergency discharge of overpressure caused by polymerization, decomposition and other reactions of the medium inside the tank body. 3.6
Road tanker for dangerous liquid goods refers to a road tanker for transporting dangerous liquid goods in a tank body and permanently connected to a standard automobile chassis or semi-trailer frame. 3.7
Liquid
refers to goods whose vapor pressure is not greater than 0.3MPa (absolute pressure) at 50℃ or which are not completely gaseous at 20℃ and 0.1013MPa (absolute pressure), and whose melting point or initial melting point is not greater than 20℃ at 0.1013MPa (absolute pressure). 3.8
Dangerous liquid goods refer to liquid goods that have dangerous characteristics such as explosion, flammability, poison, infection, corrosion, etc., and which are likely to cause personal injury, property damage or environmental pollution during transportation, storage, production, operation, use and disposal, and require special protection. 2
reference steel
refers to carbon steel with a standard tensile strength lower limit (R) of 370MPa and an elongation after fracture (A) of 27%. 4 General
4.1 General
GB18564.1—2006
4.1.1 In addition to complying with the provisions of this part, the safety technical requirements such as the design, manufacture, test methods, factory inspection, painting and marking and identification, and periodic inspection items of the tank body shall also comply with the provisions of relevant national laws, regulations and rules. 4.1.2 The design and manufacturing units shall obtain the corresponding qualifications in accordance with the relevant national regulations before they can design and manufacture the tank body. 4.1.3 Tank trucks equipped with tank bodies that meet the requirements of this part shall comply with the relevant provisions of GB20300. 4.2 Responsibilities
4.2.1 Design unit
4.2.1.1 The design unit shall be responsible for the correctness and completeness of the design documents. 4.2.1.2 The design documents of the tank body shall at least include the following contents: design calculation sheet (including tank body strength calculation, tank body volume calculation, support local stress calculation, etc.); a)
design drawings (including general drawing, tank body drawing, piping drawing, etc.); b)
design manual;
instruction manual.
4.2.1.3 The general design drawing shall at least indicate the following contents: a) product name and model;
b) chassis model, engine power, full load gross mass, curb mass, axle load mass, maximum allowable filling mass, tanker outer gallery dimensions, tank body dimensions, tank body design total volume and compartment volume and other main technical characteristic parameters; tank body design pressure, design temperature, filling medium, welding joint coefficient, corrosion allowance and unit volume filling mass and other main design parameters;
specifications and performance requirements of tank body safety accessories; d)
tank body air tightness test requirements;
the location of the tanker product nameplate.
4.2.1.4The tank body drawing shall at least indicate the following contents: a) Product name;
Design parameters such as design pressure, design temperature, filling medium, welding joint coefficient, corrosion allowance and filling mass per unit volume; brand, specification and requirements of tank body material; geometric dimensions, total design volume and compartment volume; design thickness of head and shell;
Manufacturing requirements;
Heat treatment requirements;
Non-destructive testing requirements;
Anti-corrosion treatment requirements;
Pressure test requirements.
Manufacturing unit
The manufacturing unit shall manufacture according to the design drawings approved by the prescribed procedures. If the original design needs to be modified, the original design unit shall obtain the written certification document agreeing to the modification, and make detailed records of the modified parts. 4.2.2.2 During the manufacturing process and after completion, the manufacturer shall carry out various specific inspections, tests and tests on the tank (vehicle) in accordance with the provisions of this Part and the design drawings, issue inspection, test and test reports, and be responsible for the correctness and completeness of the reports. 3
GB18564.1—2006
The manufacturer shall at least keep the following documents for reference, and the retention period shall generally not be less than 7 years. 4.2.2.3
Manufacturing process drawing or manufacturing process card;
Material certification documents and material list;
Welding process and heat treatment process records;
Inspection records of safety accessories;
Records of items selected by the manufacturer as specified in the standard;e)
Radiographic detection negatives, reports and other non-destructive testing reports;f)
Inspection, testing and test reports during and after manufacturing;g
Design drawings and process drawings (including at least general drawings, tank drawings and pipeline drawings, etc.); Product instructions;
j) Product quality certificate.
5 Design
5.1 Basic requirements
5.1.1 General requirements
5.1.1.1 The finalized chassis approved by the national competent authorities should be selected. The finalized chassis should comply with the provisions of the corresponding national standards and industry standards, and have necessary technical data and product certificates and other quality certification documents. 5.1.1.2 Tank materials and purchased parts shall comply with the provisions of relevant standards and have certificates of conformity provided by suppliers. Qualified parts and components shall be selected during assembly.
5.1.1.3 When designing the tank, the axle load of the vehicle under both empty and full load conditions shall be calculated based on the parameters of the chassis, tank and accessories, and shall not be greater than the total mass and axle load allowed by the chassis or semi-trailer. 5.1.1.4 The effective volume of tanks for transporting highly toxic (extremely or highly hazardous, omitted below) media such as phosphorus trichloride shall also comply with the provisions of relevant national laws and regulations. 5.1.1.5 The tank design of liquid dangerous goods other than those in Appendix A may refer to this chapter, but it must be technically reviewed by an organization recognized by the national competent authority.
5.1.2 Fire prevention and anti-static requirements
Tank trucks carrying flammable and explosive media should meet the following basic requirements: They should be equipped with no less than 2 fire extinguishers or effective fire extinguishing devices suitable for the transported media; a)
b) The engine exhaust device should be fireproof or equipped with an exhaust spark arrester at the outlet, and the exhaust pipe outlet should be installed at the front of the vehicle body. The exhaust spark arrester should comply with the provisions of GB13365; c) The tank body with non-metallic lining should have anti-static discharge measures; d) The anti-static requirements of the tank body and its additional equipment should comply with the relevant provisions of GB20300. 5.2 Materials
5.2.1 General requirements
5.2.1.1 The materials used for the tank body should have good corrosion resistance, mechanical properties, welding properties and other process properties, and can meet the basic requirements of the tank body's manufacturing, inspection and safe use. 5.2.1.2 The materials used for the tank body shall comply with the relevant national standards or industry standards. 5.2.1.3 When the tank body for transporting highly toxic media is made of carbon steel or low alloy steel plates, it shall be re-tested before manufacturing. The re-test shall at least include the following contents:
a) Two steel plates shall be selected according to the batch number for Charpy (V-notch) low-temperature impact test. The test temperature shall be selected according to the requirements of the design drawings and shall not exceed -20°C. The sampling direction of the test piece shall be horizontal. The low-temperature impact energy index shall comply with the provisions of GB150. Austenitic stainless steel can be exempted from low-temperature impact test;
When the steel mill fails to provide a quality guarantee for steel plates that have passed ultrasonic testing, the manufacturer shall conduct ultrasonic testing on each plate, and the qualified level b)
shall not be lower than the Level II requirements specified in JB/T4730.3. GB18564.1—2006
5.2.1.4 Tank materials (including lining materials) in contact with the medium should not react with the medium in the tank in a dangerous chemical reaction, thereby avoiding reducing the material strength or forming dangerous compounds.
5.2.1.5 Tank materials should be compatible with the medium in the tank, and their corrosion rate should not exceed 0.5mm/year, and meet the various working and environmental conditions encountered by the tank truck during use. 5.2.1.6 For tanks that transport the media in Appendix A, the materials can be selected with reference to Appendix B. 5.2.2 Provisions for the selection of steel materials
5.2.2.1 The steel materials and their applicable scopes listed in GB150 and JB/T4735 are applicable to this part. 5.2.2.2 Carbon steel or low alloy steel should have good plasticity, the yield strength at room temperature should not be greater than 460MPa, the upper limit of tensile strength should not be greater than 725MPa, and the ratio of yield strength to lower limit of tensile strength should not be greater than 0.85, and the elongation after fracture should not be less than 20%. 5.2.2.3 When there are special requirements for tank materials, they should be indicated in the design drawings or technical documents. 5.2.3 Regulations for the selection of aluminum materials
Aluminum and aluminum alloy materials should comply with the provisions of JB/T4734, and their elongation after fracture should not be less than 12%. 5.2.4 Non-metallic lining materials
The elasticity of non-metallic lining materials should not be less than that of the metal materials of the tank. 5.2.5 Forgings
Forgings shall comply with the provisions of JB4726, JB4727 and JB4728. Forgings for tanks carrying highly toxic media shall not be lower than Grade III, and forgings for tanks carrying other types of media shall not be lower than Grade II. 5.2.6 Pipes
5.2.6.1 Carbon steel and low alloy steel pipes for tanks shall comply with the provisions of GB/T8163, and stainless steel pipes shall comply with the provisions of GB/T14976.
5.2.6.2 Steel pipes that have been eddy current or ultrasonically tested in accordance with relevant standards shall be used for tanks carrying highly toxic media. For steel pipes that have not been tested, the manufacturer shall conduct water pressure tests one by one, and the test pressure shall not be less than 1.6MPa. 5.2.7 Welding materials
5.2.7.1 Welding materials shall comply with the provisions of JB/T4747 or JB/T4734 and shall have clear and firm markings. 5.2.7.2 The manufacturing unit shall establish and strictly implement the acceptance, re-inspection, storage, drying, distribution and recovery system of welding materials. 5.2.8 Insulation and insulation shell materials
5.2.8.1 The insulation material for the tank body shall have good chemical stability, shall not corrode the equipment and pipelines, shall not emit a large amount of toxic gases in the event of a fire, and shall meet the requirements of the working temperature. 5.2.8.2 The thermal conductivity of the insulation material shall comply with the provisions of the design drawings. 5.2.8.3 The insulation shell material shall be made of metal or glass fiber reinforced plastic material. 5.3 Connection requirements
5.3.1 The connection between the tank body and the chassis should be firm and reliable. In addition to meeting the requirements of the corresponding chassis modification manual, it should also meet the following requirements: When designing, the layout of the upper part should avoid causing concentrated loads on the chassis frame, and convert it into a uniformly distributed load as much as possible to improve the stress condition;
When the frame needs to be lengthened, the material used for the lengthened part should consider its weldability; Drilling or welding should be avoided in the area where the stress of the frame is concentrated; c)
The maximum offset between the longitudinal center plane of the tank body and the longitudinal center plane of the chassis should not exceed 6mm. 5.3.2 Semi-trailers can be divided into semi-load-bearing and load-bearing types according to the stress condition of the tank body and the connection method. The connection should meet the following requirements: a) For semi-load-bearing semi-trailers, the semi-trailer frame should be strength checked. b)
For load-bearing semi-trailers, the overall strength and rigidity of the tank body shall be checked in accordance with the provisions of JB/T4735 or JB/T4734. 5
GB18564.1—2006
5.4 Design method
5.4.1 General provisions
5.4.1.1 The design pressure of the tank body shall not be less than the maximum working pressure. 5.4.1.2 When determining the calculated pressure, in addition to considering the working pressure of the medium transported by the tank body, the maximum combined loads such as static, dynamic and thermal loads generated by the tank body during normal transportation and loading and unloading shall also be considered. 5.4.1.3 The butt-welded joints of the tank body shall adopt a double-sided welding or a full-penetration structure equivalent to double-sided welding, and the connection between the head and the cylinder body shall adopt a full-penetration butt-welding structure.
5.4.1.4 For tanks carrying highly toxic media, the welded joints of the manholes, pipes, flanges, etc. with the cylinder or head should adopt double-sided welding or a full penetration structure equivalent to double-sided welding.
5.4.1.5 The cross-section of the tank should generally be circular, and its design should comply with the provisions of this chapter; for tanks with non-circular cross-sections, the design should comply with the provisions of Appendix D; the selection of the cross-sectional shape of the tank should follow the following principles: a) Tanks carrying highly toxic media or tanks with a test pressure of not less than 0.4MPa in Appendix A should adopt a circular cross-section; b) Tanks carrying other media and with a test pressure lower than 0.4MPa may adopt a circular, elliptical or convex polygonal cross-section with a certain curvature.
2 Loads
The following loads should be considered in the design of the tank:
internal pressure, external pressure or maximum pressure difference;
static pressure of the liquid column when the load reaches the maximum shipping mass; inertia force during transportation;
force acting at the connection or supporting part between the support and the tank; force acting at the connecting pipes and other components; self-weight of the tank and the gravity load of the shipping medium under normal working conditions or test conditions; f
gravity load of accessories, pipelines, platforms, etc.; force caused by temperature gradient or different thermal expansion; impact force, such as the force caused by fluid impact, etc. i
During design, the static force that the tank body bears in transportation conditions shall be determined according to the following principles: 5.4.2.2
Longitudinal: maximum filling mass multiplied by twice the acceleration of gravity a)
Horizontal: maximum filling mass multiplied by twice the acceleration of gravity Vertically upward: maximum filling mass multiplied by twice the acceleration of gravity; c)
Vertically downward: maximum filling mass (including the total load due to gravity) multiplied by twice the acceleration of gravity. Note: The above loads are applied to the centroid of the tank body and do not cause an increase in the pressure of the gas phase space in the tank. 5.4.3 Design pressure and calculated pressure
5.4.3.1 The design pressure of the tank body shall be the larger value under the following conditions: a) The sum of the saturated vapor pressure of the medium and the sealing pressure at the design temperature; the operating pressure during filling and unloading.
5.4.3.2 The calculated pressure of the tank shall be the maximum of the following a), b), c) or the maximum of a), b), d): the sum of the saturated vapor pressure of the medium and the sealing pressure at the design temperature, and the equivalent pressure caused by the loads listed in 5.4.2.2. The equivalent pressure shall not be less than 0.035MPa;
The test pressure specified in the tank design code in Appendix A; b)
When the second part of the tank design code in Appendix A is G, it means that the medium with a saturated vapor pressure of not more than 0.01MPa at 50℃ is contained. The calculated pressure shall be determined according to the following principles: if gravity unloading is adopted, the larger value of twice the static pressure of the medium loaded at the bottom of the tank or twice the static water pressure shall be taken; if pressure filling or pressure unloading is adopted, 1.3 times the larger value of the filling pressure or unloading pressure shall be taken. 6
GB18564.1-—2006
d) When the value of the minimum calculated pressure is given in the second part of the tank design code in Appendix A, the calculated pressure shall be determined according to the following principles:
For the medium with a saturated vapor pressure exceeding 0.01MPa but not exceeding 0.075MPa at 50℃, the calculated pressure shall be 1.3 times the larger value of the filling or unloading pressure, and the larger value of the filling or unloading pressure and 0.15MPa. For the medium with a saturated vapor pressure exceeding 0.075MPa but less than 0.1MPa at 50℃, the calculated pressure shall be 1.3 times the larger value of the filling or unloading pressure, and the larger value of the filling or unloading pressure and 0.4MPa. 5.4.4 External pressure verification
5.4.4.1 When the vacuum valve, breathing valve or discharge system is not installed, the tank external pressure stability verification pressure shall be at least 0.04MPa higher than the tank internal pressure.
5.4.4.2 When a vacuum valve is installed but a breathing valve or discharge system is not installed, the external pressure stability check pressure of the tank should be at least 0.021MPa higher than the internal pressure of the tank.
5.4.4.3 When a breathing valve or discharge system is installed, the external pressure stability check of the tank can be exempted. 5.4.5 Design temperature
The design temperature of the tank body shall be determined according to the following requirements: If the tank body structure is naked or with a sunshade, its design temperature is 50℃; a)
If the tank body structure has an insulation layer, the design temperature shall not be less than the highest temperature that the component metal may reach. For metals below 0℃ b)
temperature, the design temperature shall not be greater than the lowest temperature that the component metal may reach. c) The determination of the tank body design temperature shall take into account the influence of ambient temperature. 5.4.6 Allowable stress
5.4.6.1When the tank body is subjected to internal pressure load, the allowable stress of steel shall be selected according to JB/T4735, and the allowable stress of aluminum and aluminum alloy materials shall be selected according to JB/T4734.
5.4.6.2 When the tank body is subjected to the loads listed in 5.4.2.2, the stress at the connection between the frame and the tank body and the tank body shall not be greater than the allowable stress value of the corresponding material specified in JB/T4735 or JB/T4734. 5.4.7 Corrosion allowance
5.4.7.1 The corrosion allowance of the material shall be determined by the design unit or provided by the user and shall meet the following requirements: a) For parts with corrosion or wear, it shall be determined based on the expected design life of the tank body and the corrosion rate of the medium on the material; b)
When the corrosion degree of each component of the tank body is different, different corrosion allowances may be used; c) For a tank body made of carbon steel or low alloy steel, its corrosion allowance shall generally be not less than 1mm. 5.4.7.2 The corrosion allowance of the material may not be considered if any of the following circumstances occurs: a) The medium has no corrosive effect on the material;
b) There is a corrosion-resistant lining or coating.
5.4.8 Medium
5.4.8.1 The classification of dangerous goods shall comply with the provisions of GB6944; 5.4.8.2 The name and number of the medium shall comply with the provisions of GB12268; 5.4.8.3 The classification of the toxic hazard and explosion hazard of the medium shall comply with the provisions of HG20660. 5.4.8.4 See Appendix A for common media.
5.4.9 Maximum allowable filling volume of the tank
5.4.9.1 The maximum allowable filling volume of the tank shall be calculated according to formula (1): W=Φ.V
W—maximum allowable filling volume of the tank, in tons (t); Φ, unit volume filling volume, in tons per cubic meter (t/m), determined according to the following principles: a) Light fuel oil medium shall be determined according to QC/T653; (1)
GB18564.1—2006
b) Other types of media shall be determined according to the gas phase space of at least 5% and not more than 10% left in the tank at the design temperature of the tank and the density of the medium at that temperature.
V-design volume of the tank, in cubic meters (m). 5.4.9.2 The maximum allowable filling mass of the tank shall not be greater than the rated load of the tank truck. 5.4.10 Calculated thickness of tank body
The calculated thickness of tank body shall be calculated according to formula (2):
=pD,/(2[o)
Wherein:
9——calculated thickness of tank body, in millimeters (mm); P. —calculated pressure, in megapascals (MPa); D.
——inner diameter of tank body, in millimeters (mm); —allowable stress of tank body material at design temperature, in megapascals (MPa); LaJt
——welding joint coefficient.
. (2)
5.4.11 Welding joint coefficient of tank body
The welding joint coefficient of steel shall be selected according to JB/T4735, and the welding joint coefficient of aluminum and aluminum alloy materials shall be selected according to 5.4.11.1
JB/T4734.
5.4.11.2 For tanks carrying highly toxic media, the welded joint coefficient of steel is 1.0, and the welded joint coefficient of aluminum and aluminum alloy materials is 0.95.
5.4.12 Support and local stress verification
5.4.12.1 The connection structure and fixing device between the tank and the chassis shall be firm and reliable. The structural form of the support connection between the tank and the chassis may adopt V-shaped support or saddle support, etc.
5.4.12.2 The support, base ring and other types of support on the tank shall have sufficient rigidity and strength, and be able to withstand the inertial force of not less than 2mg longitudinally, 2mg vertically downward, 1mg horizontally, and 1mg vertically upward (where m is the sum of the mass of the tank, accessories and the transported medium).
5.4.12.3 The part where the tank is connected to the support shall be subject to local stress verification, and its allowable stress shall be in accordance with the provisions of 5.4.6.2. 5.4.13 Minimum thickness of tank body
5.4.13.1 In any case, the minimum thickness of the tank body shall not be less than the provisions of 5.4.13.2~5.4.13.3, which does not include the negative deviation of material thickness, corrosion allowance and process thinning during the processing and manufacturing process. 5.4.13.2 The minimum thickness shall meet the following requirements: a) For tank bodies made of standard steel materials: when the diameter is not greater than 1800mm, the minimum thickness shall not be less than 5mm; when the diameter is greater than 1800mm, the minimum thickness shall not be less than 6mm; b) For tank bodies made of other steel materials, the minimum thickness can be calculated by formula (3); c) For tank bodies made of aluminum or aluminum alloy materials, the minimum thickness can be calculated according to formula (4). 8
Wherein:
the minimum thickness of the tank body of the material used, in millimeters (mm); a) or the minimum thickness of the tank body of the standard steel listed in a) of 5.4.13.3, in millimeters (mm); Rml
the lower limit of the standard tensile strength of the material used, in megapascals (MPa); the elongation after fracture of the material used, in %.
·（3）
.（4)
5.4.13.3 In case of lateral impact or overturning, when a protective device is installed to prevent the tank body from being damaged, the minimum thickness may be appropriately reduced under the conditions specified in 5.4.13.4, and shall be selected in accordance with the following provisions: GB18564.1—2006
a) For tank bodies made of standard steel: when the diameter is not greater than 1800mm, the minimum thickness shall not be less than 3mm; when the diameter is greater than 1800mm, the minimum thickness shall not be less than 4mmb) For tank bodies made of other metal materials, the minimum thickness shall be calculated according to formula (3) or formula (4) respectively, and shall not be less than the provisions in Table 1. Table 1 Minimum thickness of tank body
Diameter of tank body
Austenitic stainless steel
Other steel
Aluminum alloy
99.60% pure aluminum
5.4.13.4 The installation of protective devices to prevent tank body damage shall comply with the following provisions:>1800
Unit: mm
a) The tank body is equipped with reinforcement components, which are composed of bulkhead plates, wave-breaking plates, external or internal reinforcement rings, etc. The vertical section of the reinforcement components The combined section modulus of the surface, together with the effective reinforcement section of the tank body, shall be at least 10mm, and the corner radius of the external reinforcement shall not be less than 2.5mm;
b) The arrangement of the reinforcement components shall meet at least one of the following conditions: the distance between two adjacent reinforcement components shall not exceed 1750mm; the geometric volume of the tank body between two adjacent bulkheads or wave-breaking boards shall not exceed 7.5m, and the thickness of the bulkhead or wave-breaking board shall not be less than the thickness of the tank body wall; the effective area of ​​the wave-breaking board shall be at least 70% of the cross-sectional area of ​​the tank body. For double-walled tanks with a solid insulation layer (such as polyurethane) with a thickness of at least 50mm, when the insulation layer shell is made of low-carbon steel, the thickness shall be c
not less than 0.5mm, and when glass fiber reinforced plastic material is used, the thickness shall be not less than 2mm. 5.4.13.5 The shape of the head and bulkhead shall be dish-shaped, and its depth shall not be less than 100mm. It may also be a corrugated or other structure with the same strength.
5.4.13.6 The head and bulkhead plates shall not adopt the structure without folding edge, and their minimum thickness shall not be less than the minimum thickness of the tank body. 5.4.14 Design thickness of tank body
The design thickness of the tank body shall be the larger value of the following cases: the sum of the calculated thickness of the tank body and the corrosion allowance; a)
The sum of the minimum thickness of the tank body and the corrosion allowance. b)
Setting of wave-breaking plates
5.4.15.1 All tank bodies shall be equipped with wave-breaking plates. 5.4.15.2 Except for the wave-breaking plates used for tank body reinforcements, which shall meet the requirements in 5.4.13.4b), the effective area of ​​the remaining wave-breaking plates shall be greater than 40% of the cross-sectional area of ​​the tank body, and the upper arch area shall be less than 20% of the cross-sectional area of ​​the tank body. The geometric volume of the tank body between adjacent wave-breaking plates shall not be greater than 7.5m.
5.4.15.3 The setting of wave-breaking plates shall take into account the convenience of operation or maintenance personnel to enter and exit. 5.4.16 Manhole Setting
At least one manhole should be set on the tank body, which can generally be set on the top of the tank body. 5.4.16.1
5.4.16.2 The manhole should be a round hole with a nominal diameter not less than 450mm or an elliptical hole with a size of 500mm×350mm. 5.4.16.3 For multi-compartment tanks, the manhole setting should also take into account the convenience of maintenance personnel entering and exiting each compartment. 5.4.17
Pressure test and air tightness test
5.4.17.1 The pressure test of the tank body is generally carried out by hydraulic pressure test. For tank bodies that do not allow residual test liquid due to structural or medium reasons, or operating conditions, air pressure test can be used according to the requirements of the design drawings. 5.4.17.2 The pressure test pressure of the tank body shall be as follows: a) The hydraulic test pressure of the tank body shall be selected according to the provisions of Table A1 in Appendix A; 9
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