HG 21537.7-1992 Stirring Drive - Carbon Steel Stuffing Box HG21537.7-1992 Standard download decompression password: www.bzxz.net

Stirring transmission device-carbon steel stuffing box
HG21537.7~-92
1 Subject content and scope of application
This standard specifies the type, size, material, technical conditions, marking and relevant use regulations of carbon steel stuffing boxes for stirring transmission devices.
This standard is applicable to the stuffing box used for transmission shaft sealing in stirring vessels with design pressure PN-0.03~1.6MPa (-0.3~16bar) and design temperature -20~+300℃. 163
HG21563
Reference standard
"Stirring transmission device system combination, selection and technical requirements" 3 Type and size
The type and size of carbon steel stuffing box shall be in accordance with the provisions of Figure 3-1 and Table 3-1~2. Carbon steel stuffing box is divided into two specifications of 0.6MPa and 1.6MPa. 4
D,H7/h6
Stud
Oil cup M10X1
Details
Group 5/Group 7 Determined by the selector
33H grade
33H grade
Table 3-1
GB901—88
GB617086
GB 97.185
GB1153-79
GB83-88
GB83—88
Note: ① The packing selection is based on the operating conditions and is selected by the designer according to 5.0.3, and is noted in the remarks of the "stuffing box" item in the equipment assembly drawing, or is proposed to the supplier when ordering. PNO.6MPa is 5 packing rings, PN1.6MPa is 7 packing rings. When the stuffing box has a high pressure or sealing requirement, a high-performance packing should be selected and used in conjunction with the balance tank thermosyphon process (process 6) of the HC21572 circulation protection system. ② When the design pressure and design temperature exceed H When 4.0.8 of G21563 limits the use of 20 steel, the material of the stuffing box body and gland is changed to 16Mn.
Main dimensions
(mm）
Flange bolt holes
Packing specifications
10×10
10×10
13×13
13×13
16×16
16×16bzxz.net
16×16
Table 3-2
Mass (kg)
16×16
20×20||t t||20×20
20×20
20×20
4 Technical conditions
The connection between the stuffing box body flange and the stirring transmission device installation bottom cover is a concave-convex surface connection, and the stuffing box body is a convex 4.0.1
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 is not greater than Ra0.8μm (0.8). 4.0.4 After the stuffing box is assembled, it is tested for air tightness together with the equipment. The test pressure, The tightness requirements shall be in accordance with the assembly drawing of the equipment.
Usage regulations
5.0.1 The use of the stuffing box shall comply with the provisions of HG21563. 5.0.2 The specifications of the stuffing box shall be determined according to the diameter d of the transmission shaft. 5.0.3 The stuffing shall be soft stuffing, and the stuffing type and requirements shall be determined according to the operating conditions, and shall be indicated on the equipment assembly drawing. General asbestos or diffused asbestos packing is only used in occasions where the sealing requirements are not high. New high-performance stuffing 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 stuffing should be processed and pressed into a ring-shaped stuffing before use to improve the sealing performance. 5.0.5 This standard stuffing box is oil-lubricated, and 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 set on the lower end shaft of the stuffing box. 169
Marking example
The carbon steel stuffing box with nominal pressure PN1.6MPa and nominal diameter 490mm is marked as: HG21537.7-92
Stuffing box PN1.6DN90
Additional instructions The unit proposing, the editing unit and the main drafters of this standard
Proposing unit: Equipment Design Technology Center Station of Ministry of Chemical Industry Editing unit: Equipment Design Technology Center Station of Ministry of Chemical Industry The First Design Institute of Ministry of Chemical Industry
Main drafters: Zhu Junhao Yu Jun Ouyang Zhengguo Zhu Qiuer 171
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