Some standard content:
GB150-1998
This standard is a revision of GB150-89.
Based on the experience gained since the implementation of GB150-89 and referring to the recent international similar standards, this standard has made the following changes: 1. Cleared Chapter 8 "Horizontal Containers", Chapter 9 "Vertical Containers", Appendix E "U-shaped Expansion Joints", Appendix F "High Vibration Mode Calculation of Vertical Containers", Appendix H "Steel Jade Container Penetrant Testing" and Appendix L "Examples" in GB150-89. Among them, except Appendix L, the rest have been revised by other national standards or industry standards.
2. Added "Foreword", "Referenced Standards" and "Appendix H". 3. The content of 1.1 in GB150-89 is listed as Chapter 1 "Scope\11.2\Composition" and is cancelled + other contents are listed as Chapter 3 "General Introduction" 4. The definition of "calculated pressure" is added to Chapter 3 (Chapter 1 of GB 150-89); the definitions of minimum thickness and calculated thickness are revised + clear provisions are given for the selection of corrosion allowance 1 The table for the selection of allowable stress is consistent with JB4732 "Steel Pressure Vessels-Analysis and Design Standard"; the restriction of (force→0.1) in the pressure test is cancelled, and regulations are given for the pressure test of large vessels. 5. In Chapter 4 (Chapter 2 of GB 150-89), according to the changes in steel standards, some steel grades are added and cancelled accordingly; the technical requirements for stainless steel composite steel plates are added, and the regulations for ultrasonic testing of each steel plate are tightened. 6. Chapter 5 (Chapter 3 of GB150-89) canceled the "combined stress calculation of circular cylinder and spherical shell". 7. In Chapter 6 (Chapter 4 of GB150-89), the condition Dg/8210 was changed to D/a=20 and D,/8,10 was changed to D,/8≤20 in the calculation of external pressure circular cylinder and external pressure pipe.
8. Chapter 7 (Chapter 5 of GB 150-89) supplemented 7.2.5 "Calculation of cone shell under external pressure". 9. Chapter 8 (Chapter 6 of GB150-89) stipulated the provisions of "opening diameter without additional reinforcement" and cancelled "another method of opening reinforcement design".
10. Chapter 10 added the requirements for forged and welded pressure vessels and post-weld heat treatment process. 11. Appendix (supplements for the provisions of austenitic stainless steel cryogenic vessels. 12. Appendix H replaces Appendix A Some steel materials are included in the indicative appendix. From the date of implementation, this standard will replace CB150-89. Appendix A, Appendix B, Appendix C, Appendix D and Appendix E of this standard are all standard appendices. Appendix F, Appendix G, Appendix H and Appendix J of this standard are all indicative appendices. This standard is proposed and managed by the National Technical Committee for Standardization of Pressure Vessels. This standard is organized and drafted by the Transfer Office of the National Technical Committee for Standardization of Pressure Vessels. The participating units and drafters are: Planning Institute of Sinopec Corporation, Ye Qianhui
China General Petrochemical Machinery Engineering Corporation: An Xiaozhong China National Chemical Engineering Corporation: Wang Ziyun, Kong Meiqi Sinopec Beijing Petrochemical Engineering Corporation: Sang Ruxiang Sinopec Beijing Design Institute: Liu Zhongfu
Hefei General Machinery Research Institute of the Ministry of Machinery; Li Jingchen, Li Pingjin Chemical Industry Equipment Design Technology Center: Ying Daoxuan Zhejiang University of Technology, Zhang Kangda
South China University of Science and Technology University of Science and Technology: Hong Xigang
East China University of Science and Technology, Qiu Qingzi
China Wuhuan Chemical Engineering Company: Xu Rongfang 532
CB150-1998
The work units and personnel participating in the preparation of this standard are: Sinopec Planning Institute Shou Binan, Qiu Zuguang, Gu Zhenming, Li Jianguo, Huang Xiurong China General Petrochemical Machinery Engineering Corporation: Zhang Si Kao Construction Coordination Department of the Ministry of Chemical Industry: Liang Zhixun
Ministry of Labor Occupational Safety and Health Supervision of Furnace Pressure Vessels: Wei Hongming Sinopec Beijing Petrochemical Engineering Company: Li Shiyu Honghua University Mingde
This standard was first issued in February 1989 and revised for the first time in February 1993. This standard is entrusted to the National Technical Committee for Standardization of Pressure Vessels for interpretation. 533
1 Scope
National Standard of the People's Republic of China
Steel Pressure Vessels
Steel This standard specifies the design, manufacture, inspection and acceptance requirements for steel pressure vessels. 1. The standard is applicable to vessels with a design pressure not exceeding 35 MPa. 1.2 The design temperature range applicable to this standard is determined according to the allowable service temperature of the steel. .3 The following types of vessels are not within the scope of this standard: t) Containers directly heated by flames:
b) Containers in nuclear power plants;
CB150--1998
GB150-89
c) Pressure chambers that are integral or part of rotating or reciprocating mechanical equipment (such as pumps, compressors, turbines, hydraulic cylinders, etc.):
d) Containers transported by belts:
c) Design pressures below 0.1 MPa f) Containers with a vacuum degree lower than 0.02MPa; g) Containers with an inner diameter (for non-circular cross-sections, it refers to the width, height or diagonal, such as the diagonal for rectangles and the major axis for ellipses> less than 150mm;
h) Containers that require fatigue analysis;
1) Containers that have other industry standards. Such as some special containers and glass piercers in the refrigeration, sugar making, paper making, beverage and other industries. 1.4 For pressure components whose structural dimensions cannot be determined by this standard, the following design methods are allowed, but they must be evaluated and approved by the National Technical Committee for the Promotion of Pressure Transformers Standards.
Stress analysis including finite element method
Confirmatory experimental analysis (such as experimental stress analysis, confirmatory pressure test); comparative empirical design using comparable structures that have been put into use. 2 Referenced standards
The provisions contained in the following standards become provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB196—81 Basic dimensions of common threads
GB197-81 Tolerances and fits of common threads
GB228-87 Tensile test method for gold plaques
GB/T 229—64 Charpy notch impact test method for metals GB232—88 Bend test method for metals
GB699-88 Technical conditions for high-quality carbon structural steel CB700--88 Carbon structural steel
Approved by the State Administration of Technical Supervision on March 20, 1998 53
Implemented on October 1, 1998
GB 150---1998
GB 912—89 Carbon structural steel and low alloy structural steel hot-rolled thin steel plates and strips GB985-88 Basic forms and dimensions of weld grooves for gas welding, manual arc welding and gas shielded welding GB986-88 Basic forms and dimensions of weld grooves for buried welding Stainless steel bars
GB 1220--92
GB 1221—92
Heat-resistant steel stalls
GR/T 1804—92bzxZ.net
General tolerances Unspecified tolerances for linear dimensions
GB3077-88 Technical conditions for alloy structural steels
B3274—8 Carbon turbulent structural steel and low alloy structural steel hot-rolled thick steel plates and strips GH 3280-92
Stainless steel cold rolled steel plate
GR3531—1996Low alloy steel plate for low temperature pressure wearerGB4237-—92Stainless steel hot rolled steel plate
G4238-92Heat resistant steel plate
GB5310-1995Seamless steel pipe for high pressure boilerGR647986High pressure seamless steel pipe for fertilizer equipmentGB6654--1996Steel plate for pressure vessel
GB 8163—87
GB RI65-8?
GB 9948-88
Seamless steel pipe for conveying fluid
Stainless steel composite steel plate
Seamless steel pipe for petroleum cracking
GB 12337 --90
Steel spherical storage end
Stainless steel seamless steel pipe for boiler and heat exchanger (3 13296-- 91
Stainless steel seamless steel pipe for fluid transportation
GB/T 14976-94
13 2536- 80
JB4700-92
JB4701-92
JB4702—92
JB4703—92
JB4704--92
4705—92
JB4706—92
JB4707-92
JB4708--92
Pressure vessel painting, packaging and transportation
Pressure vessel flange classification and technical conditions
Type A flat welding flange
Type B flat welding flange
Long neck butt welding flange
Non-metallic soft gasket
Spiral wound gasket
Gold medal package gasket
Equal length stud bolts
Welding procedure assessment for steel pressure vessels
JB/T4709-92 4
Welding procedures for steel pressure vessels
JB4710-92
JB472G-94
JB4727-94
JH4728- 94
J34730--94
Steel tower vessel
Carbon steel and low alloy steel forgings for pressure vesselsCarbon steel and low alloy steel forgings for low temperature pressure vesselsStainless steel forgings for pressure vessels
Nondestructive testing of pressure vessels
JB4733-1996Explosive stainless steel composite steel plates for pressure vessels 3 General
3.1 In addition to complying with the provisions of this standard, the design, manufacture, inspection and acceptance of vessels shall also comply with relevant laws, regulations and rules promulgated by the State.
3.2 Qualifications and responsibilities
3.2.1 Qualifications
GB 1501998
3.2.1.1 The design and manufacturing units of pressure vessels must have a sound quality management system. The design unit should hold the pressure vessel design unit approval and the manufacturing unit should hold the pressure vessel manufacturing license. 3.2.1.2 The design and manufacturing of pressure vessels must be subject to the supervision of the labor administration department's safety supervision agency. 3.2. 2 Responsibilities
3.2.2, 1 Responsibilities of the design unit
3.2.2.1.1 The design unit shall be responsible for the correctness and completeness of the design documents. 3.2.2, 1.2 The design documents of the vessel shall at least include the design calculation book and the design drawings. 3.2.2.1.3 The general design drawing of the pressure vessel shall be stamped with the pressure vessel design unit approval book mark. 3.2.2.2 Responsibilities of the manufacturing unit
3.2.2.2.1, The manufacturing unit must manufacture in accordance with the detailed requirements of the design drawing. If the original design needs to be modified, the approval of the original design unit shall be obtained.
3.2.2.2.2 During the manufacturing process and after the completion of the container, the inspection department of the manufacturing unit shall conduct various physical inspections and tests on the container in accordance with the provisions of this standard and drawings, submit an inspection report, and be responsible for the correctness and completeness of the report. 3.2.2.2.3 The manufacturing unit shall have at least the following technical documents for each container product it manufactures for reference, and the technical documents shall be kept for at least 7 years.
) Manufacturing process drawings or manufacturing process cards;
b) Material certification documents and material lists;
) Welding process and heat treatment process records of the container: d) Records of items that the manufacturer is allowed to select in the standard: e) Inspection records during the manufacturing process and after the completion of the container; ) The original design drawings and completion drawings of the container.
3.2.2.2.4 After obtaining confirmation from the inspection agency that the quality of the container meets the requirements of this standard and drawings, the manufacturing unit shall fill in the product quality certificate and deliver it to the user.
3.3 Scope of penetration
The scope of the container governed by this standard refers to the shell and the pressure-bearing parts connected to it as a whole, and it is clearly divided into the following categories: 3.3.1 Connection between container and external pipe
) The first circumferential joint groove end face of welding connection; h) The first threaded joint end face of threaded connection; c) The first flange sealing surface of flange connection! d) The first sealing surface of special connector or pipe connection. 3.3.2 Pressure-bearing heads, flat covers and fasteners of pipes, manholes, handholes, etc. 3.3.3 Welded joints between non-pressure components and pressure components. Components other than joints such as reinforcing rings, supports, skirts, etc. should comply with the provisions of this standard or corresponding standards.
3.3.4 The overpressure relief device directly connected to the container shall comply with the requirements of Appendix B (Appendix of the standard). The instruments and other accessories connected to the container shall comply with the provisions of the relevant standards.
3.4 Definitions
3.4.1 Pressure
Unless otherwise specified, pressure refers to gauge pressure.
3.4.2 Working pressure
The maximum pressure that may be reached at the top of the container under normal working conditions. 3.4.3 Design pressure
The design pressure refers to the maximum pressure at the top of the container set, which, together with the corresponding design temperature, is used as the design load condition, and its value shall not be lower than the working pressure.
3. 4.4 Calculation pressure
GB 150—1998
Design pressure refers to the pressure used to determine the thickness of the component at the corresponding design temperature, including the static pressure of the liquid column. When the static pressure of the liquid column on the component is less than 5% of the design pressure, it can be ignored: 3.4.5 Test pressure
The test pressure refers to the pressure at the top of the container during the pressure test. 3.4.6 Design temperature
The design thickness refers to the metal thickness of the component set when the container works under the stop band (the average temperature along the metal cross section of the component). The design thickness and the design pressure are used as the design load conditions. The design temperature marked on the chrome plate should be the highest or lowest value of the shell design temperature. 3.4.7 Test temperature
The test temperature refers to the metal temperature of the shell during the pressure test. 3.4.8 Thickness
3.4.8.1 Calculated thickness
Calculated thickness refers to the thickness calculated by the reserve formula. When necessary, the thickness required for other loads should also be taken into account (see 3.5.41). 3.4.8.2 Design thickness
Design thickness refers to the sum of calculated thickness and corrosion allowance. 3.4.8.3 Nominal thickness
Nominal thickness refers to the thickness of the design thickness plus the negative deviation of steel thickness rounded up to the standard specification of steel. That is, the thickness marked on the drawing,
3.4.8.4 Effective thickness
Effective thickness refers to the nominal thickness minus the corrosion allowance and the negative deviation of steel thickness. 3.5 General provisions for design
3.5.1 When determining the design pressure, it should be considered that: when the container is equipped with an overpressure relief device, the design pressure should be determined in accordance with the provisions of Annex B (Appendix to the standard). For containers containing liquefied gas, within the specified filling coefficient range, the design pressure should be determined based on the maximum metal temperature that may be reached under working conditions:
When determining the design pressure of external pressure vessels, the maximum internal and external pressure difference that may occur under normal working conditions should be considered. When determining the shell thickness of vacuum vessels, the design pressure is considered to withstand external pressure. When equipped with a safety control device (such as true discharge): the design pressure is 1.25 times the maximum internal and external pressure difference or 0.1MPs, whichever is lower. When there is no safety control device, 0.1MPa is taken. For containers composed of two or more pressure chambers, such as jacketed containers, the maximum pressure difference between the chambers should be considered when determining the design pressure.
3.5.2 When determining the design temperature, it should be considered that the design temperature shall not be lower than the maximum temperature that the component metal may reach in the working state. For metal temperatures below 0℃, the design temperature shall not be higher than the minimum temperature that the component metal may reach. The design temperature of low-temperature containers shall be determined in accordance with Appendix C (Appendix to the standard). When the metal temperatures of various parts of the container are different in the working state, the design temperature of each part can be set separately. The metal temperature of the component can be obtained by heat transfer calculation, or measured on a similar container that has been used, or determined according to the internal medium temperature. 3.5.3 For containers with different working conditions, they should be designed according to the most demanding working condition, and the pressure and temperature values of each working condition should be indicated in the drawings or corresponding technical documents.
3.5.4 Loads
The following loads should be considered during design:
a) Internal and external pressure or maximum positive difference:
b) Liquid static pressure;
When necessary, the following loads should also be considered:
GB 150—1998
) The dead weight of the container (including internal parts and fillers, etc.), and the gravity load of the internal materials under normal working conditions or under pressure test conditions;
d) The gravity load of auxiliary equipment and insulation materials, linings, pipelines, escalators, platforms, etc.;
f) Wind load, ground force, snow load;
f) The reaction force of seats, bases, ears and other types of supports;
g) The force of connecting pipelines and other components;
h) The force caused by temperature gradient or different thermal expansion;
i) Impact loads including pressure surges;
tt||b) Impact reaction force, such as the reaction force caused by fluid impact;
k) The force during transportation or lifting.
3.5.5 Additive
The thickness addition is determined by formula (3-t):
C=Cr+c1
Formula:——Thickness addition, mm
C—Negative deviation of steel thickness, according to 3.5.5.1.mmC Corrosion allowance, according to 3.5.5.2, mm. 3.5.5.1 Negative deviation of steel thickness
The negative deviation of the thickness of steel plates or steel pipes shall be in accordance with the provisions of the steel standard. When the negative deviation of the thickness of the steel is not greater than 0.25mm and does not exceed 6% of the nominal thickness, the negative deviation can be ignored. 3.5.5.2 Corrosion allowance
In order to prevent the thickness of the container components from being reduced due to corrosion and mechanical wear, the corrosion allowance should be considered. The specific provisions are as follows: 2.) For components with corrosion or wear, the corrosion allowance should be determined based on the expected container life and the corrosion rate of the medium on the metal material. b) When the corrosion degree of each component of the container is different, different corrosion allowances can be used. c) For carbon steel or low alloy steel containers with compressed air, steam or water as the medium, the corrosion allowance shall not be less than 1mm. 3.5.6 The minimum thickness of the shell after processing and forming, excluding the corrosion allowance: a) For carbon steel and low alloy steel containers, not less than 3mm b) For high alloy steel containers, not less than 2mm. 3.6 Allowable stress
3.6.1 The allowable stress of the materials used in this standard shall be selected according to Chapter 4. The basis for determining the allowable stress is: steel (except bolt materials) according to Table 3-1, medium bolt materials according to Table 3-2.
Table 3-1
Micro-extraction steel, low alloy steel
High alloy steel
Allowable stress
Take the minimum value among the following values.MPa
(oe)(oa?)t
1) For austenitic filter alloy steel receiving elements, when the designed stress is lower than the deformation range and a slight permanent deformation is allowed, the allowable stress can be appropriately increased to 0.0(0 but not more than ()
. This provision does not apply to flanges or other occasions where leakage or failure occurs due to slight permanent deformation. 538
Carbon fiber reinforced plastic
Low alloy steel, martensitic high alloy pin
Austenitic high alloy
Pei Zhong,
GB 150—1998
Table 3-2
Coal bolt diameter
≤M22
M24-M48
M24--48
M24~M48
Standard tensile strength lower limit of steel.MPa; Heat treatment state
Hot rolling, fire-stopping
Standard service point (or 0.2% yield strength) at room temperature of steel, MPl; Eye point (or 0.2% yield strength) of steel at design temperature, MPa; Allowable stress, MPa
Take the minimum value of the following values
Average value of the endurance strength of steel after 100,000 hours of fracture at design temperature, MPa; Ind—The average value of the endurance strength of steel after 100,000 hours of fracture at design temperature, MPa; The end change limit of 1% end change rate in 10,000 hours, MPa. 3.6.2 When the design temperature is lower than 20℃, take the allowable stress at 20℃. 3.6.3 Allowable stress of stainless steel composite plate i. 5
For composite steel plates with a bonding ratio between the composite layer and the base layer reaching B2 grade plate or above in JB4733-1996 standard, if the strength of the composite material needs to be taken into account in the design calculation, the allowable stress at the design temperature can be confirmed according to (3-2): [o] [oa[oe.
Where: "-
allowable stress of composite steel plate at design temperature, MPa; allowable stress of base steel plate at design temperature, MPa"-- allowable stress of composite material at design temperature, MPas,- nominal thickness of base steel plate, mm;
3,- the thickness of composite material is not included in the corrosion allowance, mm..(3-2)
3.6.4 For ground force or wind load combined with other loads in 3.5.4, the stress of the container wall is allowed to be no more than 1.2 times the allowable stress.
does not consider ground force and wind load Simultaneous action. 3.7 Welding joint coefficient
The welding joint coefficient shall be determined according to the welding joint type of the pressure-bearing component and the length ratio of the non-photometric test. Double-sided welded butt joint and full penetration butt joint equivalent to double-sided weld: 100% non-destructive testing*=1.00
Same part: non-destructive testing $=0.85
Single-sided welded butt joint (with a pad close to the base metal along the entire length of the weld root): 100% non-photometric testing=0.9
Non-destructive testing 4--0.8
3.8 Pressure test
The container shall be subjected to pressure test after manufacture. The type, requirements and test pressure value of the pressure test shall be indicated on the drawing. The pressure test generally adopts the liquid repellency test. Test body According to the requirements of Chapter 10, for containers that are not suitable for hydraulic pressure test, such as containers that are not allowed to have residual liquid in the micro-disc, or containers that cannot be filled with liquid due to structural reasons, air pressure test can be used. The container for air pressure test must meet the requirements of 10.9.5.
External pressure containers and vacuum containers are pressure tested with internal pressure. For vessels consisting of two (or more than two) pressure chambers, the test pressure of each pressure case shall be indicated on the drawing, and the stability of the adjacent shell walls under the test pressure shall be checked. If the stability requirements cannot be met, it shall be stipulated that a certain pressure must be maintained in the adjacent pressure chambers during the stress test so that the pressure difference between the pressure chambers does not exceed the allowable pressure difference at any time during the entire test process (including pressure increase, pressure maintenance and pressure relief). This requirement and the allowable pressure difference value shall be indicated on the drawing. 3.B.1 Test pressure
The minimum value of the test pressure shall be as specified below, and the upper limit of the test pressure shall meet the limit of stress verification in 3.8.2. 3.8.1.1 Internal pressure vessel
Hydraulic test:
P = 1. 25A
Air pressure test:
Where: pressure - test pressure, MPa;
p-design pressure, MPa;
[o]——allowable stress of vessel component material at test temperature, MPa;[a]-
allowable stress of vessel component material at design temperature, MPa(3-.3)
1: When the maximum allowable working pressure is specified on the vessel plate (see B2.1), the maximum allowable working pressure should be used in the formula instead of the design pressure P. ? When the materials used for the various components of the vessel (cylinder, butt, pipe, flange and fixings, etc.) are different, the smallest ratio of []/[] of each material should be used. 3.8.1.2 External pressure vessels and vacuum vessels
Hydraulic test:
Air pressure test:
Where:
-test pressure, MPa!
Design pressure, MPa.
3.8.2 Force check before pressure test
Before the test, the following formula should be used to check the stress of the cylinder: Where, r—stress of the cylinder under the test positive force, MPaD—inner diameter of the cylinder, mms
Pr—, test pressure.MPa
Effective thickness of a cylinder, mm.
The following conditions shall be met:
Hydraulic test, 00.9 (2)
Gas test, 0.8)
PF 1. 25 p
= 1,15p
Where:, (.2)--pressure yield point (or 0.2% yield strength) of cylindrical material at test temperature, MPa:--welding joint coefficient of test piece.
( 3-5)
-(3-6)
GB 150--1998
3.9For vessels that cannot be pressure tested according to the provisions of 3.8, the design unit shall propose measures to ensure the safe operation of the vessel and indicate them on the drawings.
3. 10 Airtightness test
For vessels with extremely high toxicity, an airtightness test shall be carried out after the pressure test is qualified. When conducting airtightness test, the test pressure, test medium and inspection requirements shall be indicated on the drawing. Note: The classification of toxicity shall be in accordance with the provisions of the Safety Technical Supervision Procedure for Pressure Vessels (hereinafter the same). 4 Materials
4.1 General
4.1.1 Steel for pressure vessel pressure components shall comply with the provisions of this chapter for non-pressure component steel. When welded with pressure components, it shall also be steel with good weldability.
4.1.2 Steels of other steel grades other than those specified in this chapter shall also comply with the relevant provisions of Appendix A (Standard Appendix). 4.1.3 Steels for pressure vessel pressure components shall be smelted in open hearth furnace, electric furnace or oxygen converter. The technical requirements of steel shall comply with the provisions of the corresponding national standards, industry standards or relevant technical documents. 4.1.4 Steel for vessels shall be accompanied by the steel quality certificate of the material production unit. The vessel manufacturing unit shall inspect and accept the steel according to the quality certificate and re-inspect if necessary. If there is no material quality certificate from the steel production unit, the regulations of the "Regulations on Safety Technical Supervision of Pressure Vessels" shall be followed.
4.1.5 The selection of steel for pressure vessels shall take into account the use conditions of the vessel (such as design temperature, design pressure, medium characteristics and operating characteristics, etc.), the welding performance of the material, the manufacturing process of the vessel and economic rationality. 4.1.6 The upper limit of the use temperature of steel is the upper limit temperature corresponding to each steel grade in the allowable stress table of this chapter (Table 4.1, Table 4-3, Table 4-5 and Table 4-7). When carbon steel and magnetic manganese steel are used for a long time at a temperature higher than 425℃, the stone-making tendency of the carbide phase in the steel shall be considered. When the use temperature of austenitic steel is higher than 525℃, the carbon content in the steel shall not be less than 0.04%. 4.1.7 The lower limit of the service temperature of steel, except for austenitic steel and other relevant provisions of this chapter, is higher than -20°C. When the service temperature of steel is lower than or equal to -20°C, the Charpy (V-notch) low-temperature impact test shall be carried out in accordance with the provisions of Appendix C (Standard Appendix). When the service temperature of austenitic steel is higher than or equal to -196, the impact test may be exempted. 4.1.8 When there are special requirements for steel (such as special smelting methods, higher impact energy indicators, additional guarantee of high-temperature yield strength, higher non-destructive testing requirements, increased mechanical property inspection rate, etc.), the design unit shall indicate it in the drawings or corresponding technical documents. 4.1.9 The reference values of high-temperature properties of steel are shown in Appendix F (Suggestive Appendix). 4.2 Steel Plate
4.2.1 The standard, service state and allowable stress of steel plate shall be in accordance with the provisions of Table 4-1. 4.2.2 The applicable scope of carbon steel boiling steel plate Q235-A·F is: container design pressure p0.6MPat
steel plate use temperature is 0～250C;
when used in competition, the steel plate thickness is not more than 12mm and shall not be used for pressure vessels with flammable media and medium, high or extremely toxic media. Note: The classification of medium band release and the classification of flammable media shall be in accordance with the provisions of "Technical Supervision Regulations for Safety Committee of Pressure Vessels": 4.2.3 The applicable scope of carbon steel killed steel plate is as follows: a) Q235-A steel plate:
Vessel design pressure ≤1.0MPa:
Steel plate use temperature is 0~350℃,
When used for shell, the steel plate thickness is not more than 16mm and shall not be used for pressure vessels with liquefied petroleum gas medium and highly or extremely toxic medium; b) Q235-B steel plate:
Vessel design pressure b1.6MPa;
Steel plate use temperature is 0～350℃:
When used for shell attachment, the steel plate thickness is not more than 20mm; GB 150-1998
It shall not be used for pressure vessels with highly or extremely toxic medium; ) Q235-C steel plate:
Vessel design pressure p≤2. 5 MPa1
The service temperature of steel plate is 0～400℃;
When used for shell, the plate thickness shall not exceed 30mm. 4.2.4 For magnetic steel and low alloy steel plates with heat treatment during the container manufacturing process, the delivery status of the steel mill may not be the service status in Table 4-1. When the steel mill inspects and the container manufacturer re-inspects the performance of the steel plate, samples should be taken from the heat-treated sample. The sample thickness is the thickness of the steel plate, and the length and width of the sample are not less than 10-3 times the thickness of the pin plate. The axis of the sample should be located at 1/4 of the thickness from the surface of the sample, and the distance between the position of the sample and the side of the sample should be not less than the thickness of the sample, but the head (or clamping part) of the tensile test specimen is not subject to this restriction. 4.2.5 The following carbon steel and low alloy steel plates shall be used in the normalized state: a) 20R and 16MnR for shell thickness greater than 30mm; b) 20R and 16MnR for other pressure components (flanges, tube sheets, flat covers, etc.) with a thickness greater than 50mm; c) 15MnVR with a thickness greater than 16mm. 4.2.6 The following carbon steel and low alloy steel plates shall be subjected to tensile and Charpy (V-notch) impact (normal or low temperature) tests: a) Steel plates supplied in the quenched and tempered state; h) Inner steel plates of multi-layer wrapped pressure vessels; c) Steel plates for shell thickness greater than 60mm. The above b) and c) refer to the testing of the original rolled steel plates one by one. Original rolled steel plate refers to a plate rolled from a single plate or directly from a steel ingot. If the steel plate is subsequently cut into several steel plates, it shall still be considered as one steel plate when determining the location and quantity of the sample.
4.2.7: For the following steel plates used for shells, when the service temperature and steel plate thickness meet the following conditions, one steel plate shall be taken from each batch or each steel plate shall be subjected to Charpy (V-notch) low-temperature impact test in accordance with the provisions of 4.2.6. The test temperature is the service temperature of the steel plate (i.e. the minimum design temperature of the corresponding pressure component) or as specified in the drawing, and the sample sampling direction is horizontal. a) When the service temperature is below 0℃: 20R with a thickness greater than 25mm, 16MnR, 15MmVR and 1MnVNR with a thickness greater than 38mm, and 18MnMoNbR, 13MnNiMoNbR and Cr-Mo steel plates of any thickness. b) When the use temperature is lower than -10℃: 20R with a thickness greater than 12mm, 16MnR, 15MnVR and 15MnVNR with a thickness greater than 20mm
The index of low-temperature impact energy is determined according to the lower limit of the standard tensile strength of the steel plate in accordance with Appendix C (Standard Appendix): 4.2.8 When the use temperature of carbon steel and low alloy steel plates is lower than or equal to -20.Its use status and minimum impact test temperature shall be in accordance with the provisions of Table 4-2.
Table 4-2
MnCrMoVR
16MnDR
U7MnNiCrMoVR
Use status
Thickness+mm
16 ~50
>36~100
Minimum impact test temperature,
1MnNiDR
O9Mn2VDR
OSMNiDR
Use status
Normalizing, normalizing and tempering
Normalizing Normalizing and tempering
Normalizing, normalizing and tempering
GB 150—1998
Table 4-2 (Complete)
Original temperature, Tam
Micro-low impact test temperature, center
4.2.9 The following carbon steel and low alloy steel plates used for shells shall be subjected to ultrasonic testing. The ultrasonic testing method and quality standard of the steel plates shall comply with the provisions of JB4730:
a) 20R and 16MnR with a thickness greater than 30mm, the quality grade shall not be lower than grade b) 13MnVR, 15MnR with a thickness greater than 25mm, the quality grade shall not be lower than grade The quality grade of MnVNR, 18MnMoNbR, 13MnNiMoNbR and Cr-Ma steel plates shall not be lower than Grade I;
c) The quality grade of 16MnDR, 15MnNiDR, 09Mn2VDR and 09MnNiDR with a thickness greater than -20mm shall not be lower than Grade 1+
l) The quality grade of the inner steel plate of the pressure vessel wrapped with a layer shall not be lower than Grade I; e) The quality grade of the plate supplied in the quenched and tempered state shall not be lower than Grade 1. 4.2.1D High alloy steel plates are generally selected according to GB1237 standard. For steel plates with a thickness of more than 4mm, the user should indicate that they are steel plates for pressure vessels when placing orders with the steel mill to ensure that the thickness of the steel plate at the surface defect is not less than the minimum allowable thickness of the steel plate. For steel plates with a thickness of no more than 4 mm, the design unit shall specify the group of steel plate surface spraying. For steel plates with a thickness of no more than 4 mm, when selected according to GB3280 standard, the design unit shall indicate the surface processing grade of the steel plate. For steel plates for heat-resistant purposes, it can be indicated that they are selected according to GB4238 standard. 4.2.1 The elongation (,) of 100Cr18Ni5Mo3Si2 steel plates shall not be less than 23%. 4.2.12 Stainless steel composite steel plates shall meet the following requirements a) The bonding shear strength of the composite interface shall not be less than 200MPt b) The bonding rate index and ultrasonic testing range of the composite interface shall be indicated in the drawings or corresponding technical documents: c) The base material is the carbon steel and low alloy steel plate or forging listed in this standard. The composite material is the high alloy steel plate listed in this standard: d) The composite steel plate shall be supplied after heat treatment, and the state of the base layer shall comply with the relevant provisions of this chapter: e) The use scope of the composite steel plate shall comply with the provisions of the base material and the composite material use scope at the same time. In addition to complying with the above-mentioned relevant provisions, the technical requirements of composite steel plates shall also comply with the corresponding provisions of GB8165 or JB4733. 4.3 Steel pipes
4.3.1 The standards and allowable stresses of steel pipes shall be in accordance with the provisions of Table 4.3. 4.3.2 When selecting steel pipes in accordance with the GB6479 standard, the dimensional accuracy shall be selected to be higher, and the user shall indicate this requirement when placing an order with the steel mill.
4.3.3 Carbon steel and low alloy steel pipes shall be used at a temperature lower than or equal to -20°C. Their use conditions and minimum impact test temperature shall be in accordance with the provisions of Table 4-4.
Table 4-4
Use conditions
Wall thickness.mm
Minimum impact test temperature
Due to size limitations, it is impossible to prepare steel pipes with small-sized punching specimens of 5mm×10mm×55mm, and impact tests are exempted. The minimum use temperature of steel pipes of various steel grades shall be in accordance with the provisions of Appendix C (Appendix to the standard). 543
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