Some standard content:
Stirring transmission device - stainless steel stuffing box
HG21537.8-92
Subject content and scope of application
This standard specifies the type, size, material, technical conditions, marking and relevant use regulations of stainless steel stuffing boxes for stirring transmission devices.
This standard is applicable to stirring vessels with design pressure PN-0.03~1.6MPa (-0.316bar), design temperature -20~300℃, corrosive media, and stuffing boxes used for transmission shaft sealing. 173
HG21563
Reference standard
"Stirring transmission device system combination, selection and technical requirements" 3 Type, size
The type and size of stainless steel stuffing boxes shall be in accordance with the provisions of Figure 31 and Table 3-1~~2. Stainless steel stuffing boxes are divided into two specifications: PNo.6MPa and PN1.6MPa. 4
D, H7/h6
Stud
Oil cup M10×1
Details
5 groups/7 groups
To be determined by the selector
Stainless steel/20
Stainless steel
Stainless steel/20
Stainless steel
33H grade
Table 3-1
GB901-88
GB6170—86
GB 97.1—85
GB1153—79
GB83-88
GB83-88
Note: ① The selection of packing is based on different operating conditions and is selected by the designer according to 5.0.3, and is noted in the "stuffing box" note of the equipment assembly drawing list, or is proposed to the supplier when ordering. PNO.6MPa is 5 packing rings, PN1.6MPa is 7 packing rings. When the use pressure or sealing requirements of the stuffing box are high, high-performance packing should be selected and used in conjunction with the balance tank thermosyphon process (process 6) of the HG21572 circulation protection system. ② When the design pressure and design temperature exceed the use limit of 20 steel in 4.0.8 of HG21563, the stuffing box body and gland material are changed to stainless steel/16Mn.
Main dimensions
Flange bolt holes
Packing specifications
13×13
13×13
16×16
16×16
16×16
20×20
20×20
20×20
Table 3-2
Mass (kg)
Technical conditions
4.0.1 The connection between the stuffing box body flange and the stirring transmission device-mounting bottom cover is a concave-convex surface connection, and the stuffing box body is a convex surface, and the fit is H7/h6.
4.0.2 The verticality tolerance between the body flange sealing surface and the axis is in accordance with the 8th grade accuracy of GB1184-80. 4.0.3 The surface roughness of the shaft in contact with the packing shall not exceed Ra0.8μm (0.8). 4.0.4 After the packing box is assembled, it shall be tested for air tightness together with the equipment. The test pressure and tightness requirements shall be in accordance with the assembly drawing of the equipment.
5 Usage regulations
5.0.1 The use of the packing box shall comply with the provisions of HG21563. 5.0.2 The specifications of the packing box shall be determined according to the shaft diameter d of the transmission shaft. 5.0.3 The packing shall be soft packing, and the packing type and requirements shall be determined according to the operating conditions. The ears shall be indicated on the equipment assembly drawing. General asbestos or impregnated asbestos packing is only used in occasions where the sealing requirements are not high. New high-performance packings such as expanded polytetrafluoroethylene, flexible graphite, carbon fiber, and aromatic sulfone packing should be selected according to the corresponding product instructions. 5.0.4 The packing is pressed into a ring-shaped packing after processing to improve the sealing performance. 5.0.5 This standard stuffing box is oil lubricated. The lubricating oil will flow into the container along the shaft. Therefore, for materials that are not allowed to be contaminated, an oil storage cup should be installed on the lower shaft of the stuffing box. 5.0.6 The materials and codes of the stainless steel parts of the stuffing box shall be in accordance with the provisions of Table 5.0.6. Material
OC-18Ni9
00Cr19Ni10
oCr18Ni1oTi
(1Cr18Ni9Ti）
0Cr17Ni12Mo2
ooCr17Ni14Mo2
Marking example
The stainless steel stuffing box with nominal pressure PN1.6MPa and nominal diameter 90mm is made of 0Cr18Ni10Ti, and its marking is HG21537.8-92
Stuffing box PN1.6DN90/321
The unit proposing this standard, the editing unit
Additional instructions
And the main drafting units People
Proposal unit: Equipment Design Technology Center Station of Ministry of Chemical Industry Editor-in-chief unit: Equipment Design Technology Center Station of Ministry of Chemical Industry First Design Institute of Ministry of Chemical Industry
Main drafters: Zhu Junhao, Yu Jun, Ouyang Zhengguo, Zhu Qiuer
Stirring transmission device
HG2156321572-95
HG21537.7~~8-92
CompilationwwW.bzxz.Net
1. Purpose of compilation
Stirring equipment is a type of unit equipment that realizes various chemical processes such as polymerization, mixing, neutralization, dissolution, crystallization, absorption and heat transfer by mechanically stirring the liquid multiphase system. It is widely used in chemical, pharmaceutical, petrochemical, light industry and other industries. In the design and manufacturing process of the whole equipment, the stirring transmission device part accounts for a large workload. In the past, there have been some standards for transmission, sealing and other parts, such as HG5-214~215-81, HG5-1410~1415-81 "Stuffing Box" standard: HG5-748-78, HG5-751~756-78 "Mechanical Seal" standard: CD130B6~B8-86 "Frame" standard, etc. However, these standards are single component standards, self-contained, and have not formed an organic whole. In advanced countries in the world, the stirring transmission device has been standardized and systematized, and is supplied as a set by specialized companies. Therefore, according to this international development trend, it is necessary to revise some of the original component standards and formulate some new standards to make the stirring transmission device an organic whole, which is convenient for designers to select and for designated manufacturers to organize production. Therefore, according to the work plan issued by the Construction Coordination Department of the Ministry of Chemical Industry, this set of standard series was compiled through investigation and research on the basis of extensive collection of relevant information.
2. Standard Scope
This set of standards is for agitator transmission device series, including: flange, mounting bottom cover, single-pivot frame, double-pivot frame, transmission shaft, coupling with short section, block elastic coupling, (in-kettle) coupling, mechanical seal, mechanical seal circulation protection system and stuffing box. Considering that the part in the tank of the agitator is highly technological and complex, the workload of compiling the standard is very large. Therefore, this standard series does not include the agitator paddle in the kettle, the agitator shaft in the kettle and its supporting structure in the kettle (such as the intermediate bearing and bottom bearing in the kettle). This part of the content will be supplemented when conditions are ripe. 3. Basis for compilation
The compilation of this standard mainly refers to the relevant standards of advanced industrial countries in the world, as well as the product samples and company standards of foreign companies.
4. Determination of parameters
(1) Considering that the operating pressure of most of the mixing vessels currently used in my country is below 1.6MPa (16bar), in order to consider the versatility and scope of application of the standard, the applicable pressure range of the standard is set to 0.1~1.6MPa (1~16bar). Due to the close matching relationship between the various parts and components in this standard series, it is impossible for flanges, mounting bottom covers and other parts to be divided into several pressure levels like flanges. All pressure-bearing components are classified according to 1.6MPa (16bar) for design and verification.
(2) Determination of the operating temperature range
The operating temperature of commonly used mixing vessels is within the range of -20 to +300℃, and taking into account the change of the allowable stress of the materials used for the pressure-bearing parts in the series with the increase of temperature, as well as the reliable working temperature range of the packing seal and mechanical seal, therefore, the applicable temperature range of this standard is specified as -20 to +300℃. (3) Determination of the shaft diameter specification of the transmission shaft
The applicable shaft diameters of some mixing transmission parts specified by the former Ministry of Chemical Industry are: 30, 40, 50, 65, 80, 95, 110, 130, a total of 8 specifications, and the shaft diameter between 50 and 110 is the commonly used specification. The original standard has a shaft diameter specification of 15mm per gear within this range, which is generally required to be appropriately increased in engineering design. At the same time, the maximum shaft diameter size of 130 also cannot meet the current requirements of large-scale equipment. The shaft diameter specifications of foreign standards are: 40, 50, 60, 70, 80, 90, 100, 125, 140, 160, 200, 220. Referring to foreign standards and combining the actual situation of my country's engineering construction, the density of commonly used shaft diameter series is appropriately increased, and the shaft diameter series size range is expanded to meet the requirements of the development trend of large-scale equipment. Therefore, the shaft diameter series specified in this standard is: 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 160, a total of 13 specifications. 5. Matters to be noted in selection
(1) This series includes many parts and components, and the matching relationship between them is relatively complex, but the key is the shaft diameter of the transmission shaft. As long as you grasp this point and gradually expand it, it will be easier to use this set of standard series. The transmission shaft diameter is generally considered to be consistent with the agitator shaft diameter. The agitator shaft diameter is determined according to the calculation method specified in the HG/T20569 "Mechanical Mixing Equipment" standard.
(2) This set of standard series includes two types of frames, single-pivot and double-pivot, to meet the needs of different working conditions. The double-pivot frame is suitable for occasions where the agitator shaft load is large and there are high requirements for the agitator sealing device. For large equipment, if conditions permit, it is generally recommended to use a double-pivot frame. For medium load conditions, and where the reducer output shaft fulcrum can be used as another fulcrum, a single-pivot frame can be selected. (3) This set of standard series includes two types of seals: packing seals and mechanical seals. Packing seals are suitable for mixing equipment with low sealing requirements and regular maintenance. However, when selecting sealing packing, it is necessary to fully consider the medium, mixing speed, and lubrication conditions, and select suitable packing. It is generally recommended that the packing be used after cutting and pressing into packing rings. Mechanical seals are suitable for pressurized and vacuum mixing equipment working in highly corrosive, flammable, explosive, highly toxic and solid particle-containing media. The type and material of mechanical seals should be selected according to the temperature, pressure, medium, sealing requirements and the relevant provisions of HG/T20569 and mechanical seal standards. Different mechanical seals should also be equipped with corresponding circulation protection systems to improve the working reliability of mechanical seals.
(4) This series has a significant feature, that is, mechanical seals and packing seals can be installed, replaced and repaired without disassembling the frame and reducer. The maintenance workload of mixing equipment is greatly reduced. Based on this point, the shaft-shelf structure is considered in this device to ensure the realization of the above functions. The shaft-shelf device is divided into two types: top-mounted (the transmission shaft is installed from the top of the bottom cover) and bottom-mounted (the transmission shaft is installed from the bottom to the top in the tank). From the perspective of easy installation, the top-mounted structure is generally recommended. However, for large equipment, where the installation space is limited, the bottom-mounted structure should be used. After determining the installation form of the transmission shaft, attention should be paid to installing the bottom cover and selecting the type of the internal coupling to keep the structure consistent. In particular, special attention should be paid to the type of the internal coupling. Welded flange and integral flange couplings are only suitable for bottom-mounted transmission shafts. (5) Selection of matching reducers
This set of standard series does not include reducer standards. Only two appendices are listed in the frame standards (HG21566, HG21567), which recommend the types and models of reducers applicable to this series. When selecting reducers, standard reducers and products produced by professional manufacturers should be given priority. Generally, gears or planetary cycloid pinwheel reducers with higher transmission efficiency are selected. When using a single-point frame, if the design requires, it should be negotiated with the reducer manufacturer to calculate the bearings of the reducer output shaft to ensure the normal operation of the transmission shaft.
6. Strength Verification
The pressure-bearing components in this standard series are all verified according to GB150, and considering the particularity of the structure and load, corresponding technical treatment is made in reference to foreign standards. The strength of the remaining parts in the series are all verified. 7. Assembly inspection requirements
The quality of the parts and assembly quality of the mixing transmission device has a great impact on the operation of the mixing container. Therefore, this series puts forward corresponding technical requirements for each part and component in the standards and construction drawings. And puts forward detailed factory inspection requirements for the designated manufacturer after the assembly of the whole set of equipment is completed, mainly testing the axial runout and radial runout of the mixing transmission shaft. 8. Organize designated production
The mixing transmission device includes sealing components such as mechanical seals and stuffing boxes, as well as machined and cast parts such as frames and couplings. The production of these products adopts commercialized professional production, which is extremely advantageous compared to the self-preparation and processing of each equipment manufacturing unit. The three standards involve a large number of parts and specifications. Only by using specialized and designated production methods can the advantages of standardized and serialized quality, price, delivery cycle, after-sales service, maintenance and transformation be fully utilized. The standard compilation group has currently completed all the construction drawings of this set of standards and various related drawings for supporting use. While the above standards are promulgated and implemented, Pakistan will organize the designated transfer and production of this set of standard technology and construction drawings. This will be of great benefit to promoting the implementation of the new standards, organizing production and ensuring supply, improving quality and reducing costs. For specific designated enterprises and varieties, please refer to the attached table. Finally, it should be noted that the characteristics of this standard are strong matching and suitable for complete set supply. The role of this standard is mainly to guide users to choose, rather than to design according to it. At the same time, the design and use departments should correctly fill in the ordering conditions table of HG21563 according to the working conditions, conditions and corresponding provisions in the standard, and submit it to the designated manufacturer. If there are technical requirements beyond the provisions of the standard, they should be explained to the designated manufacturer when placing an order so that the designated manufacturer can make corresponding modifications after consultation with the Equipment Design Technology Center of the Ministry of Chemical Industry.Matters to be noted in selection
(1) This series includes many parts and components, and the matching relationship between them is relatively complex, but the key is the shaft diameter of the transmission shaft. As long as you grasp this point and gradually expand it, it will be easier to use this standard series. The transmission shaft diameter is generally considered to be consistent with the shaft diameter of the mixing shaft. The shaft diameter of the mixing shaft is determined according to the calculation method specified in the HG/T20569 "Mechanical Mixing Equipment" standard.
(2) This standard series includes two types of frames, single-pivot and double-pivot, to meet the needs of different working conditions. The double-pivot frame is suitable for occasions where the mixing shaft load is large and there are high requirements for the mixing sealing device. For large equipment, if conditions permit, it is generally recommended to use a double-pivot frame. For medium load conditions, and where the reducer shaft fulcrum can be used as another fulcrum, a single-pivot frame can be selected. (3) This standard series includes two types of seals: packing seals and mechanical seals. Packing seals are suitable for mixing equipment that does not require high sealing and allows regular maintenance. However, when selecting sealing packing, the medium, stirring transmission speed, and lubrication conditions should be fully considered, and appropriate packing should be selected. It is generally recommended that the packing be used after being cut and pressed into packing rings. Mechanical seals are suitable for pressurized and vacuum mixing equipment working in highly corrosive, flammable, explosive, highly toxic, and solid particle-containing media. The type and material of mechanical seals should be selected according to the temperature, pressure, medium, sealing requirements, and the relevant provisions of HG/T20569 and mechanical seal standards. Different mechanical seals should also be equipped with corresponding circulation protection systems to improve the working reliability of mechanical seals.
(4) This series has a significant feature, that is, mechanical seals and packing seals can be installed, replaced, and repaired without disassembling the frame and reducer. The maintenance workload of the mixing equipment is greatly reduced. Based on this point, the shaft shelf structure is considered in this device to ensure the realization of the above functions. The shaft shelf device is divided into two types: top-mounted (the transmission shaft is installed from the upper end of the bottom cover) and bottom-mounted (the transmission shaft is installed from the bottom to the top in the tank). From the perspective of easy installation, the top-mounted structure is generally recommended. However, for large equipment, where the installation space is limited, it is advisable to adopt a bottom-mounted structure. After determining the installation form of the drive shaft, attention should be paid to installing the bottom cover and selecting the type of the inner coupling to keep the structure consistent. In particular, the type of the inner coupling should be paid special attention to. Welded flange and integral flange couplings are only suitable for bottom-mounted drive shafts. (5) Selection of matching reducers
This set of standard series does not include reducer standards. Only two appendices are listed in the frame standards (HG21566, HG21567), which recommend the types and models of reducers applicable to this series. When selecting reducers, standard reducers and products produced by professional manufacturers should be given priority. Generally, gears or planetary cycloid pinwheel reducers with higher transmission efficiency are selected. When using a single-point frame, if the design requires, it should be negotiated with the reducer manufacturer to calculate the bearings of the reducer output shaft to ensure the normal operation of the drive shaft.
6. Strength Verification
The pressure-bearing components in this standard series are all verified according to GB150, and considering the particularity of the structure and load, corresponding technical treatment is made in reference to foreign standards. The strength of the remaining parts in the series are all verified. 7. Assembly inspection requirements
The quality of the parts and assembly quality of the mixing transmission device has a great impact on the operation of the mixing container. Therefore, this series puts forward corresponding technical requirements for each part and component in the standards and construction drawings. And puts forward detailed factory inspection requirements for the designated manufacturer after the assembly of the whole set of equipment is completed, mainly testing the axial runout and radial runout of the mixing transmission shaft. 8. Organize designated production
The mixing transmission device includes sealing components such as mechanical seals and stuffing boxes, as well as machined and cast parts such as frames and couplings. The production of these products adopts commercialized professional production, which is extremely advantageous compared to the self-preparation and processing of each equipment manufacturing unit. The three standards involve a large number of parts and specifications. Only by using specialized and designated production methods can the advantages of standardized and serialized quality, price, delivery cycle, after-sales service, maintenance and transformation be fully utilized. The standard compilation group has currently completed all the construction drawings of this set of standards and various related drawings for supporting use. While the above standards are promulgated and implemented, Pakistan will organize the designated transfer and production of this set of standard technology and construction drawings. This will be of great benefit to promoting the implementation of the new standards, organizing production and ensuring supply, improving quality and reducing costs. For specific designated enterprises and varieties, please refer to the attached table. Finally, it should be noted that the characteristics of this standard are strong matching and suitable for complete set supply. The role of this standard is mainly to guide users to choose, rather than to design according to it. At the same time, the design and use departments should correctly fill in the ordering conditions table of HG21563 according to the working conditions, conditions and corresponding provisions in the standard, and submit it to the designated manufacturer. If there are technical requirements beyond the provisions of the standard, they should be explained to the designated manufacturer when placing an order so that the designated manufacturer can make corresponding modifications after consultation with the Equipment Design Technology Center of the Ministry of Chemical Industry.Matters to be noted in selection
(1) This series includes many parts and components, and the matching relationship between them is relatively complex, but the key is the shaft diameter of the transmission shaft. As long as you grasp this point and gradually expand it, it will be easier to use this standard series. The transmission shaft diameter is generally considered to be consistent with the shaft diameter of the mixing shaft. The shaft diameter of the mixing shaft is determined according to the calculation method specified in the HG/T20569 "Mechanical Mixing Equipment" standard.
(2) This standard series includes two types of frames, single-pivot and double-pivot, to meet the needs of different working conditions. The double-pivot frame is suitable for occasions where the mixing shaft load is large and there are high requirements for the mixing sealing device. For large equipment, if conditions permit, it is generally recommended to use a double-pivot frame. For medium load conditions, and where the reducer shaft fulcrum can be used as another fulcrum, a single-pivot frame can be selected. (3) This standard series includes two types of seals: packing seals and mechanical seals. Packing seals are suitable for mixing equipment that does not require high sealing and allows regular maintenance. However, when selecting sealing packing, the medium, stirring transmission speed, and lubrication conditions should be fully considered, and appropriate packing should be selected. It is generally recommended that the packing be used after being cut and pressed into packing rings. Mechanical seals are suitable for pressurized and vacuum mixing equipment working in highly corrosive, flammable, explosive, highly toxic, and solid particle-containing media. The type and material of mechanical seals should be selected according to the temperature, pressure, medium, sealing requirements, and the relevant provisions of HG/T20569 and mechanical seal standards. Different mechanical seals should also be equipped with corresponding circulation protection systems to improve the working reliability of mechanical seals.
(4) This series has a significant feature, that is, mechanical seals and packing seals can be installed, replaced, and repaired without disassembling the frame and reducer. The maintenance workload of the mixing equipment is greatly reduced. Based on this point, the shaft shelf structure is considered in this device to ensure the realization of the above functions. The shaft shelf device is divided into two types: top-mounted (the transmission shaft is installed from the upper end of the bottom cover) and bottom-mounted (the transmission shaft is installed from the bottom to the top in the tank). From the perspective of easy installation, the top-mounted structure is generally recommended. However, for large equipment, where the installation space is limited, it is advisable to adopt a bottom-mounted structure. After determining the installation form of the drive shaft, attention should be paid to installing the bottom cover and selecting the type of the inner coupling to keep the structure consistent. In particular, the type of the inner coupling should be paid special attention to. Welded flange and integral flange couplings are only suitable for bottom-mounted drive shafts. (5) Selection of matching reducers
This set of standard series does not include reducer standards. Only two appendices are listed in the frame standards (HG21566, HG21567), which recommend the types and models of reducers applicable to this series. When selecting reducers, standard reducers and products produced by professional manufacturers should be given priority. Generally, gears or planetary cycloid pinwheel reducers with higher transmission efficiency are selected. When using a single-point frame, if the design requires, it should be negotiated with the reducer manufacturer to calculate the bearings of the reducer output shaft to ensure the normal operation of the drive shaft.
6. Strength Verification
The pressure-bearing components in this standard series are all verified according to GB150, and considering the particularity of the structure and load, corresponding technical treatment is made in reference to foreign standards. The strength of the remaining parts in the series are all verified. 7. Assembly inspection requirements
The quality of the parts and assembly quality of the mixing transmission device has a great impact on the operation of the mixing container. Therefore, this series puts forward corresponding technical requirements for each part and component in the standards and construction drawings. And puts forward detailed factory inspection requirements for the designated manufacturer after the assembly of the whole set of equipment is completed, mainly testing the axial runout and radial runout of the mixing transmission shaft. 8. Organize designated production
The mixing transmission device includes sealing components such as mechanical seals and stuffing boxes, as well as machined and cast parts such as frames and couplings. The production of these products adopts commercialized professional production, which is extremely advantageous compared to the self-preparation and processing of each equipment manufacturing unit. The three standards involve a large number of parts and specifications. Only by using specialized and designated production methods can the advantages of standardized and serialized quality, price, delivery cycle, after-sales service, maintenance and transformation be fully utilized. The standard compilation group has currently completed all the construction drawings of this set of standards and various related drawings for supporting use. While the above standards are promulgated and implemented, Pakistan will organize the designated transfer and production of this set of standard technology and construction drawings. This will be of great benefit to promoting the implementation of the new standards, organizing production and ensuring supply, improving quality and reducing costs. For specific designated enterprises and varieties, please refer to the attached table. Finally, it should be noted that the characteristics of this standard are strong matching and suitable for complete set supply. The role of this standard is mainly to guide users to choose, rather than to design according to it. At the same time, the design and use departments should correctly fill in the ordering conditions table of HG21563 according to the working conditions, conditions and corresponding provisions in the standard, and submit it to the designated manufacturer. If there are technical requirements beyond the provisions of the standard, they should be explained to the designated manufacturer when placing an order so that the designated manufacturer can make corresponding modifications after consultation with the Equipment Design Technology Center of the Ministry of Chemical Industry.
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