HG 2367-1992 Technical requirements for polyvinyl chloride polymerization kettle
Some standard content:
Chemical Industry Standard of the People's Republic of China
HG2367-92
Technical Conditions for Polyvinyl Chloride Polymerization Kettle
Published on September 15, 1992
Ministry of Chemical Industry of the People's Republic of China
Implementation on July 1, 1993
Subject Content
Chemical Industry Standard of the People's Republic of China
Technical Conditions for Polyvinyl Chloride Polymerization Kettle
HG236792
This standard specifies the requirements for the design, manufacture, inspection and acceptance of slurry vinyl chloride polymerization kettles (hereinafter referred to as polymerization kettles). This standard is applicable to polymerization kettles with a volume of 4~150m3; a body design pressure of full vacuum~2.5MPa; a jacket design pressure of 0.1~1.6MPa; and polyvinyl chloride resin is produced by the polymerization reaction of vinyl chloride monomer. Other polymer labels with similar media can also refer to this standard for implementation.
2 Reference standards
Technical conditions for bolts
Technical conditions for nuts
Steel pressure vessels
Technical conditions for arched metal flame rupture pieces
Technical conditions for high-quality carbon structural steel
Carbon structural steel
Stainless steel welding rods
Overlay welding rods
GB1168
GB1184
GB1220
GB1226||tt ||GB1390
GB1591
GB1804
GB2100
GB2270
GB3077
GB3280
GB3323
Technical conditions for studs
Shape and position tolerances
Provisions for unmarked tolerances
Stainless steel bars
General pressure gauges
Steel wire for welding
Low alloy structural steel
Tolerances and fits Limit deviations of dimensions without tolerances Technical conditions for stainless acid-resistant steel castings
Stainless steel seamless steel pipes
Technical conditions for alloy structural steels
Stainless steel cold wheel steel plates
Radiography and quality grading of steel fusion welded butt joints GB3836.1
GB4237
GB4242
GB4323
GB5014
GB5117
GB5118
General requirements
Explosiveness Explosion-proof electrical equipment for environmental use
Hot-rolled stainless steel plate
Stainless steel wire for welding
Elastic sleeve pin coupling
Elastic pin coupling
Carbon steel welding rod
Low alloy steel welding rod
Ministry of Chemical Industry of the People's Republic of China·Approved on September 15, 1992, implemented on July 1, 1993
GB5293
Flux for submerged arc welding of carbon purple steel
GB5843
GB6069
GB 6414
GB6654
GB8163
GB8165
GB9439
GB11352
GB12241
Flange coupling
Roller chain coupling
Casting dimension tolerance
HG2367—92
Carbon rope for pressure vessel Seamless steel pipes for conveying fluids with thick steel and low alloy steel plates
Stainless steel composite steel plates
Gray cast iron parts
Casting carbon steel parts for general engineering
General requirements for safety valves
GB12242
GB12243
Safety valve performance test methods
Spring direct load safety valve
HG5-10||tt ||Manual upward expansion stainless steel discharge valve
HG5-12 discharge valve technical conditions
HG5-213
Vertical clamp coupling
HG5--1425
Pneumatic upward expansion stainless steel discharge valve
HG5010~5028 pipe flange
HG/T2043 three-leaf backward curved agitator technical conditions signed with mechanical seal Series and main parameters
HG2098
HG2099
Test specification for mechanical seals for kettles
Auxiliary device for mechanical seals for skewer
HG/T2122
HG/T2124
Technical conditions for paddle agitators
HG/T2125
Technical conditions for turbine agitators
HG G/T2126
Technical conditions for propeller agitators
HG/T2127 Technical conditions for frame agitators
HG2269
HGA006
Technical conditions for mechanical seals
Safety technical regulations for polyvinyl chloride production
Free taper and free angle tolerance
Product label
JB113 0
JB1585
JB1586
JB1799
JB2536
JB2982
JB3965
JB4700
JB4707
Technical conditions for lever type safety valve
Basic parameters of cylindrical gear reducer
Technical conditions for pressure vessel forgings Technical conditions
Cylindrical gear reducer
ZQH arc cylindrical gear reducer
ZDH, ZLH, ZSH arc cylindrical gear reducerNCW type planetary gear reducer
Paint packaging and transportation of pressure vessels
Cycloidal pinwheel reducer
Magnetic particle inspection of steel pressure vessels
Classification and technical conditions of pressure vessel flanges
Equal-length studs for pressure vessel flanges
Material selection regulations for steel chemical containers
ZBJ74003
Ultrasonic inspection of steel plates for pressure vessels
3 Basic requirements for design
IIG2367—92
3.1 Materials
The material of the polymer body should be stainless steel plate or composite steel plate (carbon steel, low alloy + stainless steel). 3.1.1 The materials of pressure components shall meet the following standards 3.1.1.1 Steel plates shall meet the requirements of GB8165, GB3280, GB4237 and GB6654, 3.1.1.2 Steel pipes shall meet the requirements of GB2270 and GB8163, 3.1.1.3 Bars shall meet the requirements of GB699, GB700, GB1220 and GB1591, 3.1.1.4 Forgings shall meet the requirements of Appendix A and Appendix B of JB755 and HGJ15. 3.1.1.5 Welding materials shall meet the requirements of GB983, GB984, GB5117, GB5118, GB5293 and GB1300.
GB4242,
3.1.2 General materials shall meet the following standards: 3.1.2.1 Ordinary carbon structural steel shall meet the requirements of GB700. Low alloy structural steel shall comply with the provisions of GB1591. Alloy structural steel shall comply with the provisions of GB3077. 3.1.2.2 Carbon steel castings shall comply with the provisions of GB11352. Gray iron castings shall comply with the provisions of GB9439. Stainless acid-resistant steel castings shall comply with the provisions of GB2100. 3.1.3 When foreign materials are used for the main pressure-bearing components, materials permitted by the country's pressure vessel specifications shall be selected and shall comply with the corresponding foreign material standards.
3.2 The design of the kettle and safety devices of the polymerization ingot shall comply with the provisions of GB150 and the "Regulations on Safety Technical Supervision of Pressure Vessels" issued by the Ministry of Labor in addition to complying with this standard. 3.3 The design of the transmission and stirring device shall comply with the provisions of relevant standards. 3.4 The explosion-proof level of the motor shall comply with the requirements of Q-1 grade places specified in HGA006 and comply with the provisions of GB3836.1, and dIIBT4 grade shall be selected.
3.5 The mechanical seal series and main parameters shall comply with the provisions of HG2098. 3.6 The reducer shall meet the following requirements.
3.6.1 The transmission efficiency of the reducer shall not be less than 90%, and natural cooling shall be used as much as possible. 3.6.2 The reducer shall run smoothly without impact, vibration and uneven hooking noise. 3.6.3 There shall be no oil leakage or seepage at the sealing and jointing points. 3.6.4 Cylindrical gear reducers shall comply with the provisions of JB716 and JB1130; arc cylindrical gear reducers shall comply with the provisions of JB1585 and JB1586;
planetary gear reducers shall comply with the provisions of JB1799; cycloidal pinwheel reducers shall comply with the provisions of JB2982. 3.7 Imported instruments should comply with the standards of the supplier country; domestic instruments should comply with the relevant standards. The accuracy level of the pressure gauge should not be lower than 2.5, and should comply with the provisions of GB1226. 3.8 The schematic diagram of the classification of polymerization kettles according to the transmission mode and bottom bearing type is shown in Figure 1-a, Figure 1-b, Figure 1-c, Figure 1-d3
Upper transmission signature bottom assembly welding bearing
HG2367-92
Upper transmission kettle bottom edge installation bottom bearing
Figure 1-b
Lower transmission
Figure 1-c|| tt||4 Requirements for materials in manufacturing
HG236792
Upper transmission suspension shaft
Figure 1-d
4.1 The materials used in the polymer pressure vessel part shall have a quality certificate. The materials used to manufacture the main pressure-bearing components of the kettle body belonging to the third category pressure vessel shall be re-tested for chemical composition and mechanical properties according to the furnace batch number before use. 4.2 The base steel plate of the composite steel plate, which meets the following conditions. When placing an order, the steel mill shall be asked to conduct ultrasonic flaw detection on each sheet and reach the corresponding qualified level. The method and quality standard shall be in accordance with the provisions of ZBJ74003. a. 20R with a base steel plate thickness greater than 38mm shall meet the requirements of Class IV. 16MnR with base plate thickness greater than 30mm shall meet the class requirements, b.
Other low alloy steel plates with base plate thickness greater than 25mm shall meet the requirements of Class III 4.3 Carbon steel and low alloy steel plates (including layer steel plates of composite steel plates) that meet the following conditions shall be used in normalized state.
HG2367-92
a. 20R and 16MnR with flange and flat cover thickness greater than 50mm. b. 15MnVR with thickness greater than 25mm.
4.4 The materials for manufacturing the main pressure-bearing components must be marked and transplanted during the manufacturing process and records must be kept. 4.5 The substitution of materials for the main pressure-bearing components must obtain the consent of the design unit and have design modification certification documents 4.6 When using foreign materials, before the first use, the mechanical properties, chemical composition, bonding strength of the composite steel plate, surface roughness of the steel plate and other properties shall be tested and accepted according to the technical requirements and raw material standards. 5. Manufacturing requirements of the body
5.1 Hot and cold forming
5.1.1 Requirements for groove surface
a. The groove surface shall not have defects such as cracks, delamination, and entrapment. b. The groove surface of steel with standard tensile strength gb>540MPa and Cr-Mo low alloy steel after flame cutting shall be inspected by magnetic powder or penetrant flaw detection. When magnetic powder or penetrant flaw detection cannot be performed, the cutting process shall ensure the groove quality. c.: Before welding, the oxide, oil, molten metal and other harmful impurities on the groove surface shall be cleaned. The cleaning range (measured by the distance from the groove edge) shall not be less than 30mm. 5.1.2 Head
5.1.2.1 The minimum distance between various non-intersecting welds of the head shall not be less than 3 times of the nominal thickness 5, and not less than 100mm. When the head is made of a plate and a round plate, the welding direction is only allowed to be radial and circumferential (see Figure 2). Figure 2
5.1.2.2 The minimum thickness of the head after stamping shall not be less than the nominal thickness 5n minus the negative deviation of the steel plate thickness C15.1.2.3 The shape deviation of the inner surface of the elliptical, butterfly, spherical and folded edge chain head after stamping shall be checked with an inner template with a chord length of not less than 3/4 of the designed inner diameter Di (see Figure 3). The maximum interval shall not be greater than 1.25% of the designed inner diameter Di of the head. The longitudinal wrinkle depth of the straight edge part shall not be greater than 1.5mm. When checking, the template should be perpendicular to the surface for measurement, and it is allowed to avoid the weld area.
: For butterfly-shaped and folded-edge conical heads, the inner radius of the transition zone corner shall not be less than the specified value in the drawing, HG2367-92
>3D, Z4
1 Head: 2 Sample
5.1.2.4 The maximum and minimum diameter difference and diameter size limit deviation of the head shall comply with the provisions of Table 1. Table】
Nominal diameter of head
800~1200
1300~1600
1700~2400
2600~3000
3100~4000
5.1.3 Assembly of cylinder and signature body
5.1.3.1·The cylinder is formed by cold rolling,
Diameter limit deviation
Maximum and minimum diameter difference
5.1.3.2 The weld is aligned with the inner mouth, and the misalignment of the A and B welds 6 (see Figure 4) shall comply with the provisions of Table 2. The misalignment b (see Figure 5) of the composite steel plate shall not exceed 50% of the thickness of the steel plate composite layer and shall not exceed 2 mm. Table 2
Nominal sequence at the joint
Misalignment of the joint according to the type of weld b
≤1/45n
≤1/48m
HG 236792
5.1.3.3 The correction angle E formed by welding in the circumferential direction shall be checked with an inner or outer sample with a chord length equal to 1/6 of the designed inner diameter Di and not less than 300mm (see Figure 6). The E value shall not be greater than (on/10+2)mm and not greater than 5mm. The correction angle E formed by welding in the axial direction (see Figure 7) shall be checked with an inspection ruler with a length of not less than 300mm. The E value shall not be greater than (3n/10+2)mm and not greater than 5mm
1/ 6D, and not less than 300
1/6D, and not less than 300
HG 2367—92
Figure, 7
5.1.3.4 For Class B welds and Class A welds connecting the cylinder and the spherical head, when the thickness of the two plates is unequal, the inner and outer sides of the cylinder shall be aligned. If the thickness of the thin plate is not more than 10mm, and the difference between the two plates exceeds 3mm, or if the thickness of the thin plate is more than 10mm, and the difference between the two plates exceeds 30% of the thickness of the thin plate or exceeds 5mm, the edge of the thick plate shall be thinned on one side according to the requirements of Figure 8. 2
>3(8,-8)
When the difference between the thickness of the two plates is less than the above value, the misalignment shall be in accordance with the requirements of 5.1.3.2, and the misalignment b shall be determined based on the thickness of the thinner plate. When measuring the misalignment b, the difference between the thickness of the two plates shall not be taken into account. 5.1.3.5-The roundness of the cylinder subjected to external pressure shall be checked as follows (see Figure 9)). Figure 9
. The inspection deviation is measured with an inner or outer arched template. The radius of the template arc is equal to the designed inner radius or outer radius of the shell (depending on the measuring position), and its chord length is equal to twice the arc length found in Figure 4-12 of GB150. The measuring point should avoid welds or other protruding parts.
b. The maximum positive and negative deviation value e measured along the outer diameter or inner diameter of the shell with the template shall not be greater than the maximum allowable deviation value found in Figure 10-11 of GB150.
When the intersection of Do/Se and L/Do falls above the uppermost curve or below the lowermost curve in Figure 10-11 of GB150, the maximum positive and negative deviation e shall not be greater than 8e and 0.2e respectively. C
When any section of the circle is made of plates of different thicknesses, se takes the effective thickness of the most active plate. 9
HG2367-92
d. The L and Do values of the cylinder, spherical shell or conical shell shall be selected in accordance with the provisions of Chapter 4 or Chapter 5 of GB150. 5.1.3.6 The shell of the cylinder subjected to internal pressure shall be checked for the shell straightness according to the following requirements. a. The difference c between the maximum diameter and the minimum diameter on the same section of the cylinder shall not be greater than 1% of the designed inner diameter Di of the section, and not greater than 25mm (see Figure 9)
b. When the section to be inspected is located at the opening or within the range of one times the inner diameter of the opening from the center of the hole, the difference e between the maximum inner diameter and the minimum inner diameter of the section shall not be greater than the difference between 1% of the designed inner diameter Di of the section and 2% of the inner diameter of the opening, and not greater than 25mm. 5.1.3.7 The straightness AL of the cylinder body is 2H/1000 and not greater than 20mm, where H is the operating height. Note: The straightness of the cylinder body is checked by pulling a 0.5mm thin steel wire at four locations of 0°, 90°, 180°, and 270° along the horizontal and vertical lines of the center line. The distance between the measuring position and the Class A weld shall not be less than 100mm. 5.1.3.8 The length deviation of the cylinder body shall be in accordance with the provisions of Table 3 and Table 3
Cylinder length m
Length errorbzxZ.net
->2.5~≤5
>5~≤10
>10~≤15
5.1.3.9 During assembly, the distance between the Class A welds of adjacent cylinders or the distance between the end point of the Class A weld of the head and the Class A weld of the adjacent cylinder shall be greater than three times the nominal thickness Sn, not less than 100mm, and the cylinder length shall not be less than 303mm.5.1.3.10 When the guide plate is installed in the circular jacket, the gap between the guide plate and the jacket is 0~2mm, and the local gap is not more than 4mm. 5.1.3.11 When the upper transmission device is used and the bottom wheel bearing is installed on the lower edge of the kettle body, the coaxiality tolerance of the inner hole of the upper and lower edges of the body is 0.2mm/m. The verticality tolerance of the edge plane of the shaft seal box, transmission frame and bottom bearing box to the axis is 0.2mm/m (see Figure 10 and Figure 1-b schematic diagram).
1-Plane connecting the drawer box;
2-Plane connecting the transmission frame;
Plane connecting the drawer box
HG2367—92
5.1.3.12 The flange surface should be perpendicular to the main axis centerline of the connecting pipe or round cylinder. The installation of the connecting pipe flange should ensure that the flange surface is horizontal or vertical (special requirements should be specified in the drawings), and the deviation should not exceed 1% of the flange outer diameter (when the flange outer diameter is less than 100mm, it should be calculated as 100mm), and should not be greater than 3mm.
5.1.3.13 The edges of the welds between the container internals and the signature body should avoid the welds between the seals and the seals and between the seal and the head. 3.1.3.14 The limit deviation of the un-toleranced dimensions of the machined parts and non-machined parts shall be in accordance with the Js14 and Js16 grades of accuracy specified in GB1804.
5.2 Welding
5.2.1 The welder responsible for the body welding must pass the examination and hold a valid certificate. 5.2.2 Preparation before welding and welding environment
5.2.2.1 The extended storage of welding rods, flux and other welding materials should be kept dry, and the relative humidity shall not be greater than 60%. 5.2.2.2 When any of the following conditions occurs in the welding environment and no effective measures are taken, welding is prohibited. Wind speed is greater than 10m/s during manual welding;
b: Wind speed is greater than 2m/S during gas shielded welding; Relative humidity is greater than 90%;
Rainy and snowy environment.
5.2.3 When the temperature of the weldment is lower than 0C, it should be preheated to not less than 15.5.2.4 Welding process
5.2.4.1 The welding process assessment before welding the container should be carried out in accordance with the national standard "Welding process assessment for pressure vessels". 5.2.4.2 The welding process specification of the container should be formulated according to the technical requirements of the drawings and the qualified welding process. 5.2.4.3 The welding process assessment report, welding process specification, welding record and welder's identification mark shall be kept for not less than 7 years. 5.2.4.4 When new materials, new processes and foreign materials are used, welding process assessment must be carried out before the first welding. 5.2.5 Requirements for the shape, size and appearance of the weld surface. 5.2.5.1 The weld reinforcement of type A and B (see Figure 11) shall be in accordance with the provisions of Table 4. Figure
Weld depth 5 (81)
12<≤25
Manual welding
Weld reinforcement. (el)
Automatic welding
Note; Weld depth: for single-sided welding, it is the thickness of the parent material; for double-sided welding, it is the depth from the midpoint of the straight edge of the groove to the surface of the parent material. Calculate both sides separately. 11
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