Some standard content:
ICs71.120.10,75.180.20
Request No.1396—1998
Chemical Industry Standard of the People's Republic of China
HG 3129~-1998
Integrated multilayer clumping high pressure vessel
Integrated multilayer clumping high pressure vesseles1998-03--23 Issued
Ministry of Chemical Industry of the People's Republic of China
Implementation on 1999—01-01
HG3129—1998
Cited Standards
Inspection Methods
Inspection Rules
Factory Technical Documents
Marking, Packaging, Transportation
HG3129—1998
This standard is formulated on the basis of summarizing the design and manufacturing experience of integrated multilayer clumping high pressure vessel products. It is a standard that adopts the American ASME Certificate-1 Pressure Vessel Construction Code (1995 Edition) in a non-equivalent manner. An integral multi-layer clamping high-pressure vessel refers to a multi-layer pressure vessel formed by using a manipulator to clamp the layers layer by layer on an integral inner shell, and the longitudinal ring welding joints of the layers are staggered. This standard is proposed by China Chemical Equipment Corporation. This standard is under the jurisdiction of the Chemical Machinery and Equipment Standardization Technical Committee of the Ministry of Chemical Industry. The drafting unit of this standard: Changsha Tongda Group Changsha Chemical Machinery Factory. The main drafters of this standard: Wu Jingsheng, Li Yujiang, Chen Kangwu, Xi Jianjian, Fan Shu
Chemical Industry Standard of the People's Republic of China
Integrated mulilayerclumpinghighpressurevesselesHG 3129-1998
This standard specifies the design, manufacturing, inspection and acceptance requirements of steel integral multi-layer clamping high-pressure vessels (hereinafter referred to as pressure vessels). This standard is applicable to pressure vessels with a design pressure not exceeding 35MPa. The design temperature range applicable to this standard is -20℃～350℃. For pressure vessels with design temperatures equal to or lower than -20℃ and higher than 350℃, supplementary provisions should also be formulated on the drawings. 2 Reference Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid, all standards will be revised, and all parties using this standard should explore the possibility of using the latest versions of the following standards. GB 150-1998
GB 699—88
GB/T983—1995
GB/T 1184—1996
GB 3077—88
GEB4242—84
GB/T5117—1995
GB/T5118—1995
GB 529385
GB 6479--86
GB 6654—1996bzxz.net
GB/T 14957-94
JB2536—80
JB4708—92
JB/T4709-92
JB 4726—94
JB 4728—94
JB4730—94
Steel pressure vessels
Technical conditions for high-quality carbon structural steel
Stainless steel welding rods
Shape and position tolerances without tolerance values
Technical conditions for alloy structural steel
Hot-rolled stainless steel plates
Stainless steel wire for welding
Carbon steel welding rods
Low-carbide welding rods
Flux for buried welding of carbon steel
High-pressure seamless steel pipes for fertilizer equipment
Steel plates for pressure vessels
Steel wire for fusion welding
Painting, packaging and transportation of pressure vessels
Welding procedure qualification for steel pressure vessels| |tt||Welding code for steel pressure vessels
Old carbon steel and low alloy forgings for pressure vessels Stainless steel parts for pressure vessels
Nondestructive testing of pressure vessels
Laboratory Code [1990J8 No. Safety Technical Supervision Code for Pressure Vessels Approved by the Ministry of Chemical Industry of the People's Republic of China on March 23, 1998 and implemented on January 1, 1999
3 Requirements
3.1 Materials
HG3129-1998
3.1.1 Basic requirements
3.1.1.1 Steel for pressure components of pressure vessels shall comply with the provisions of this chapter. When non-pressure components are welded with pressure components, they must also be steel with good weldability.
3.1.1.2 Steels with other steel grades other than those specified in this chapter shall also comply with the relevant provisions of GB150-1998 and its Appendix A. 3.1.1.3 The standard, use status and allowable stress of steel shall comply with the provisions of GB150. 3.1.2 The materials of pressure components shall comply with the drawings and the following provisions: a) The materials of the inner cylinder and the head shall comply with the provisions of GB4237.GB6654, and the steel plates shall be subjected to ultrasonic flaw detection according to the provisions of JB4730, and the quality grade shall not be lower than grade 1. The inner cylinder plates shall also be subjected to tensile test and Charpy (V-notch) room temperature impact test; b) The materials of the layer plates shall comply with the provisions of GB6654, c) The materials of the steel pipes shall comply with the provisions of GB6479: d) The materials of forgings shall comply with the provisions of JB4726.JB4728 e) The materials of bolts (columns) and nuts shall comply with the provisions of GB699 and GB3077, 3.1.3 The welding materials shall comply with the provisions of GB/+983.GB4242.GB/T5117GB/T5118.GB5293 and GB/T14957. 3.1.4 When selecting foreign steel, it should be the steel permitted for use in the latest foreign pressure vessel specifications. Its scope of use should generally not exceed the provisions of the specifications, and should not exceed the provisions of steel with similar composition and technical requirements in Chapter A of GF150-1998. 3.2 Calculation
Explanation of symbols
Additional thickness of multilayer container
Additional thickness of inner value of multilayer container
Inner diameter of cylinder
Outer diameter of cylinder (Do-Di+2bn)
Elastic modulus of material at average wall temperature
Ratio of outer diameter to inner diameter of cylinder K
Calculation pressure,
Maximum allowable working pressure test pressure of cylinder of multilayer container, MPa,
Linear expansion coefficient of material at average wall temperature
Calculation temperature of cylinder, mm
Effective thickness of cylinder, mm;
Nominal thickness of inner cylinder of multilayer container, mm;
Total thickness of laminate of multilayer container, mm;
mm/mm:
Nominal thickness of circular cylinder, mm,
Poisson's ratio of materials at average wall temperature, when there is a lack of accurate data, μ=0.3 can be taken; calculated stress of circular cylinder at design temperature, MPa; comprehensive allowable stress of mesh cylinder materials at design temperature, MPa allowable stress of inner cylinder materials of multi-layer container at design temperature, [o]i=[a, MPa; allowable stress of layer plate materials at design temperature, [oJa=[o]\, MPa; stress of cylinder wall under test pressure, MPa;
welding joint coefficient;
HG3129—1998
welding joint coefficient of inner cylinder of multi-layer container, Φ=1: welding joint coefficient of layer plate layer of multi-layer container, Φ. =0.95. 3.2.2 Calculation of wall thickness of circular cylinder under internal pressure
The calculated thickness of multi-layer cylinder at design temperature is calculated according to formula (1). The formula is applicable to the range of design pressure Pc≤0.4[@, 8=
3.2.3 The calculated stress of the wall of the multi-layer circular cylinder at the design temperature is calculated according to formula (2). Pe(Di+)≤[oj
[@ value is calculated according to formula (3).
3.2.4 The maximum working pressure of the multi-layer circular cylinder at the design temperature is calculated according to (4) 280aa
Dit8e)
3.2.5 The calculation of other pressure components is in accordance with the requirements of GB150. 3.2.6 Stress verification during pressure test
The stress verification of the wall before the water pressure test is calculated according to formula (5). PDIF8
During the water pressure test, the stress of the wall. It shall not exceed 90% of the yield point of the material at the test temperature (the static pressure of the liquid column should be included in the verification). 3.3 Manufacturing
The manufacturing of pressure vessels shall comply with GB150 "Regulations on Safety Technical Supervision of Pressure Vessels" and drawing requirements in addition to complying with these regulations. 3.3.1 Processing and Forming of Parts
3.3.1.1Determine the processing allowance according to the manufacturing process conditions to ensure that the thickness of the head and the cylinder is not less than the nominal thickness of the component minus the negative deviation of the steel.
3.3.1.2 Requirements for groove surface
a) There shall be no defects such as cracks, slag inclusions, etc. on the groove surface. The groove surface of r-Mo low alloy steel after flame cutting shall be inspected by magnetic powder absorption or penetrant testing for steel with standard tensile strength lower limit value %>540MPa.
e) Before welding, the oxides, oil stains, slag and other harmful impurities on the groove surface shall be cleaned up, and the cleaning range (measured by the distance from the groove edge) shall not be less than 20mm.
3.3.1.3 End cap
The manufacture of end cap shall comply with the provisions of 10.2.8 in GB150-1998. 3.3.1.4 Forming of inner tube segment
a) The misalignment of the joints of type A welds is b, 1mm (see Figure 1). Figure 1
b) The angle Ei formed at the type A weld joint shall be checked with an inner or outer sample with a chord length equal to 1/6Di and not less than 300mm (see Figure 2), and the value of E shall not exceed 1.5mm.
1/6D and not less than 300mm
Group 1 plate
IIG3129-1998
c) The tolerance of the outer circumference shall be less than or equal to 3%Di, and not more than 3mm. 1/6Di and not less than 300mm
sample, plate
d) The shortest section length of the inner tube is not less than 30mm, e) The difference between the maximum inner diameter and the minimum inner diameter on the same section is not greater than 4%Di, and not greater than 5mm. 3.3.1.5 Welding of inner tube sections
a) When the inner tube sections are paired, the distance between the centers of the adjacent A-type joints or the distance between the end point of the A-type joint of the head and the center of the A-type joint of the adjacent section should be greater than 100mm
b) The misalignment of the inner tube B-type welded joint bz≤1.5mm (see Figure 3). Figure 3
c) The core angle Ez formed by the inner tube B-type joint is checked with a ruler of not less than 300mm in length (see Figure 4). Its E value is not greater than 1.5mm
d) The straightness tolerance of the inner tube before and after welding is less than 1% of the length of the tube, and not greater than 6mm. e) Length tolerance of the cylinder:
1) When the length of the cylinder is not more than 10m, the tolerance is ±15mm2) When the length of the cylinder is more than 10m, the tolerance is ±20mm4
3. 3. 1. 6 Layers
HG3129-1998
) Layers are allowed to be spliced, the number of spliced pieces is not more than 3, and the minimum splicing width is not less than 500mm. Both surfaces of the spliced joint must be polished and flush with each material
b) The circumferential size of the layer should be cut according to the actual circumference of the clamped inner cylinder. After considering the welding head source, the circumference is only allowed to be negative deviation, and the value is not more than 3mm.
) The axial length of the laminate section should be such that the circumferential joints of each layer of laminate are staggered, and the minimum distance Lmln between the circumferential joints of the outer layer and the circumferential joints of the inner layer shall be in accordance with the requirements of the drawing (see Figure 5). Lmin
d) The parallelism of the opposite sides of the laminate and the perpendicularity deviation of the two opposite sides shall comply with the L-level requirements in GB/T1184. e) Before clamping the layers, all welded joints on the outer surface of the inner tube or the previous layer of layers should be flush with the parent material, and the rust, oil stains and debris that affect the fitting of the plates on the surface of the layers should be removed. 1) The longitudinal joints of each layer of layers should be evenly staggered, and the longitudinal joint angles of adjacent layers should be greater than those given in the drawing (see Figure 6). The outer layer
8) The root spacing of the longitudinal circumferential welded joints of the layers should meet the following requirements: 1) The longitudinal joints of the layers shall be 6mm≤P≤14mm (see Figure 7a); HG3129-1998
2) The spacing between the circumferential joints of the layers shall be 6mm≤P, ≤8mm (see Figure 7b); @
h) Control of the interlayer gap at the ends of the layers
The radial gap between adjacent layers and the arc length of the radial gap with an original height greater than or equal to 0.25mm should be measured at the end face of each layer section. After measurement, calculate the estimated gap area Ae according to the method shown in Figure 8. The value of any estimated gap area Ag expressed in square millimeters on any end surface shall not exceed 25 times the value of the layer thickness expressed in millimeters, and the length b of any layer gap shall not exceed the inner diameter of the container. If there is more than one gap between adjacent layers, the sum of the gap lengths shall not exceed the inner diameter of the container h
Maximum height of radial gap
-radius of radial gap maximum front
-gap location, mm
layer thickness, mm
estimated gap area,
DControl of loose area of layers
or equal to
The maximum height of the layer gap shall not exceed 3mm. Arc length of segment
For vessels with a design inner diameter Di not greater than 1000mm, the length of each loose part along the circumferential direction shall not exceed 0.3Di, and the length along the axial direction shall not exceed 600mm; for vessels with a design inner diameter greater than 1000mm, the length of each loose part along the circumferential direction shall not exceed 300mm, and the length along the axial direction shall not exceed 600mm.
3.3.1.7 Outer plate
a) The forming and dimensional tolerances of the outer plate shall comply with the provisions of a), b), c) and d) in 3.3.1.6. b) After the outer plate is welded, the clamping process holes of the outer plate must be blocked with the same material as the outer plate and polished to be flush with the outer plate. A Φ6mm discharge hole should be drilled on the two diagonal blocking plates of each section of the outer plate (the process holes of the inner plate also serve as discharge holes). 3.3.1.8 Connection between cylinder and cylinder flange or end cap b) Connection between inner cylinder and cylinder flange or end cap (see Figure 9), the misalignment b: ≤1mm. b) Connection between layer plate and outer layer plate and cylinder flange or bottom end cap (see Figure 10), the misalignment b≤0.8mm. 6
3.3.2 Explosion welding
HG3129-1998
Cylinder flange or end cap
【End trapezoid】
Grinding and smoothing
Inner body
Cylinder flange or end cap
Inner cylinder
8.3.2.1 Before welding, the welding process of the layer plate welding joints shall be evaluated according to the provisions of B1708 (including layer plate and end flange and end cap,
3.3.2.2 Pressure vessel The welding procedure specification shall be formulated in accordance with the provisions of JB/T4709, the technical requirements of the drawings and the qualified welding procedures. 8.3.2.3 A product welding test plate shall be prepared for the inner shell of the pressure vessel. The requirements for the test plate and the performance inspection of the test plate shall be in accordance with the provisions of the Safety Technical Supervision Regulations for Pressure Vessels and Appendix E of GB150-IS98. 3.3.2.4 The shape, size and appearance requirements of the welded joint failure surface shall be in accordance with the provisions of GB150. 3.3.2.5 Welding repair
a) When the welded joint needs to be repaired, a repair process shall be formulated. 6) The number of repairs on the same part of the welded joint should not exceed two times. If it exceeds two times, the repair shall be approved by the chief technical officer of the manufacturing unit before repair. The number of repairs, parts and repair conditions shall be recorded in the quality certificate of the container.) For containers requiring heat treatment, repairs shall generally be carried out before heat treatment. If repairs are carried out after heat treatment, necessary heat treatment shall be carried out after welding.
0) For stainless steel containers with requirements for anti-grain shoulder corrosion, the repaired parts shall still meet the original requirements. 3.3.3 Heat treatment
For those that meet one of the following conditions, heat treatment shall be carried out to eliminate residual stress: a) Class A welded joints of the inner cylinder section of the low alloy pin of the case pot; 6) Class E welded joints connecting the inner cylinder and the end flange shall comply with the provisions of 10.4 of GB150-1998; c) Welded joints connecting the spherical head and the pipe (or support). 3.3.4 Nondestructive testing
3.3.4.1 The A-type welded joints of the inner shell shall be subjected to 100% radiographic inspection. 3.3.4.2 The surfaces of the welded joints in the following cases shall be subjected to 100% ultrasonic inspection: a) The welded joints between the layers of the plate and the end flange or spherical head! b) The longitudinal welded joints of the outermost layer of the plate
c) The spliced joints of the layer plates.
HG3129-1998
3.3.4.3 The surface of welded joints in the following cases shall be inspected by magnetic particle or penetrant testing: a) Class D welded joints of inner sleeves and layers; b) Materials with standard tensile strength lower limit g>540MPa; c) Overlay welding surface:
d) Surfaces of defective grinding or repair welding of materials with standard tensile strength o lower limit>540MPa and Cr-Mo low alloy steel, and surfaces of weld marks where fixtures and tie bars are removed. 3.3.4.4 Inspection standards
a) Radiographic inspection of welded joints shall be carried out in accordance with JB4730, and the basic inspection results of Class AB welded joints of inner sleeves at level 1 are qualified. b) Ultrasonic inspection of welded joints shall be carried out in accordance with JB4730, and the inspection results shall comply with 3.3.4.2, Grade I is qualified. c) Magnetic particle and penetrant testing of welded joints shall be carried out in accordance with JB4730, and the inspection results are all qualified at Grade 1. 3.3.4.5 Repeated inspection
a) If there are unacceptable defects in the welded joints inspected by X-ray or ultrasonic testing, they shall be repaired and welded after the defects are removed, and the original flaw detection method shall be used to re-inspect the part until it is qualified. b) Defects found by magnetic particle testing and penetrant testing shall be repaired and welded, and the original flaw detection method shall be used to re-inspect the part until it is qualified.
3.3.5 Pressure test
3.3.5.1 After the pressure vessel is manufactured, a water pressure test shall be carried out. 3.3.5.2 The water pressure test pressure shall be in accordance with the provisions of 3.8.1 and 3.8.2 of GB150-1998. When the vertical container is placed horizontally for hydraulic test, the test pressure shall be the test pressure when it is placed vertically plus the static pressure of the liquid column. 3.3.5.3 The requirements for water pressure test shall be in accordance with 10.9 of GB150-1998. 3.3.5.4 For pressure vessels with airtightness test requirements, airtightness test shall be carried out. The requirements for airtightness test shall be in accordance with 10.9 of GB150-1998.
4 Inspection methods
4.1 Dimensional and appearance inspection (including appearance inspection of welded joints) shall be in accordance with GB150. 4.2 Nondestructive testing shall be in accordance with JB4730.
4.3 Inspection of internal welding test plate shall be in accordance with 33.23. 4.4 Water pressure test shall be in accordance with 10.9 of GB150-1998. Airtightness test shall be in accordance with 10.9 of GB150-1998. 4.5
Inspection rules
Type inspection
Type inspection shall be carried out during the finalization and identification of trial-produced products. 5.2 Factory inspection
5.2.1 Factory inspection shall be carried out unit by unit.
5.2.2 Factory inspection items shall comply with the provisions of 3.1 and 3.3. 6 Factory technical documents
6.1 Factory technical documents shall comply with the provisions of 10.10.1 of GB150-1998. 6.2 The factory technical documents of pressure vessels shall at least include the following contents: a) Product certificate and quality certificate:
b) Product manual:
c) Product performance diagram.
7 Marking, packaging, transportation
HG3129-1998
Mark the container according to the provisions of 10.10.2.2 of GB150-1998. The painting, packaging and transportation of pressure vessels shall comply with the provisions of JB2536. 7.2
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