HG 21537.6-1992 Stainless steel stuffing box for pipes (PN0.6) (with preparation instructions) HG21537.6-1992 standard download decompression password: www.bzxz.net

Stainless steel stuffing box for pipe
HG21537.6--92
Subject content and scope of application
This standard is a sealing device for detachable internal extension pipes in chemical, petroleum, pharmaceutical and other industrial equipment. Its nominal pressure is PN0.6MPa and it is suitable for corrosive media and medium temperature 200℃.
2 Type, basic parameters and dimensions
The structural type, basic parameters and dimensions of this standard are shown in the figure below and Table 21~2. DN 5
Stud
Details
Type I or Type I
See Table 2-2
Same as item number 3
Same as item number 3
257273
Type I or Type I
Gland stud
Quantity and diameter
Table 2-1
To be determined by the user
GB 898--88A
GB 6170--86
GB 97. 1-85
Table 2—2
Basic packing
10×10
13×13
19×19
25×25
25×25
22×22
3 Technical requirements
3.0.1 After the packing box is assembled, it shall be subjected to water pressure test together with the equipment. The test pressure and tightness shall be in accordance with the equipment assembly drawing.
3.0.2 The mechanical properties and material selection of studs and nuts shall be in accordance with the national standard 6.8 and 6 respectively, and the mechanical properties of washers shall be 140HV. 38
The packing shall be soft packing, which shall be selected according to the operating requirements and refer to Appendix II, and shall be indicated on the equipment assembly drawing.
4.0.2~Two grades of stainless steel components are used for stuffing boxes in this standard, as shown in Table 4.0.2.
Material grade
OCr18Ni11Ti(321)
Marking example
00Cr17Ni14Mo2(316L)
The stainless steel stuffing box for pipes with a nominal diameter of DN50mm is made of OCr18Ni9Ti and is marked as follows:
Stuffing box PN0.6DN50—IHG21537.6--92—44.0.4 The various specifications of stuffing boxes in this standard should be marked and labeled according to the provisions of Table 4.0.4.
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
Stuffing box
DN25 I
DN100I
DN1001
DN125I
DN125I
DN1501
DN1501
DN2001
DN2001
Specified marking
HG 21537.6—92-1
HG 21537.6—922
HG21537.6—92--3
HG 21537.6-92—4
HG 21537.6-92-5
HG21537.6—92--6
HG21537.6—92-7
HG 21537.6—92—8
HG21537.6—92--9
HG21537.6—92-10
HG 215 37.1--92
HG 21537.2- 92bzxZ.net
HG 21537. 3—92
HG21537.4-92
Dimensions and specifications of pressed packing
《Carbon steel packing box (PNO.6)》
《Stainless steel packing box (PNO.6)》
《Normal pressure carbon steel packing box (PN<0.1)》《Normal pressure stainless steel packing box (PN0.1)》For the dimensions and specifications and tolerances of pressed packing, please refer to the figure below and Appendix 1. fad+0.20
Nominal diameter
Appendix 1
Packing specifications
10×10
10×10
13×13
13×13
16×16
16×16
16×16
16×16
20×20
20× 20
20× 20
Note: The manufacturing process of the pressed packing shall be determined by the relevant manufacturer according to the different types of packing. 42
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Additional Notes
The unit proposing this standard, the editing unit
and the main drafters
Proposing unit: Equipment Design Technology Center Station of Ministry of Chemical Industry Editing unit: First Design Institute of Ministry of Chemical Industry
Participating units: Equipment Design Technology Center Station of Ministry of Chemical Industry Main drafters
Editor-in-chief: Zhu Junhao
Participating editors: Yan Dexiang
Ouyang Zhengguo
Approved by: Zhu Qiuer Township
Zhu Junhao
Approved by: Zhu Qiuer
Yan De (Equipment Design Technology Center Station of the Ministry of Chemical Industry) 5
HG21537--92
Preparation Instructions
This standard is prepared according to the work plan for revising the HG5--214-81 and HG5-219-81 "Stuffing Box" standards issued by the Ministry of Chemical Industry (91) Chemical Base Standard No. 21.
I. Overview
This standard is prepared based on extensive consultation with design units, user units and manufacturers on the opinions of the original standard "Stuffing Box" series in the process of more than ten years of use, and on the basis of consulting relevant recent domestic and foreign information and relevant national general standards, and analyzing, comparing, summarizing and organizing.
This standard is to modify the shortcomings of the original standard "Stuffing Box" series, and expand the series range accordingly to meet the needs of large-scale equipment. The specific revisions include the following aspects: 1. Shaft diameter series
Cancel the two specifications of 465.*95, and add seven specifications of 470.80, 490, 4100, *120, 140, 47
$160.
2. Structure
(1) Cancel the water jacket structure of the stuffing box. (2) Use molded annular packing with a certain tolerance, increase the size of most series packing and the diameter of packing clamping bolts; increase the axial clamping force of the packing. At the same time, reduce the number of packing layers, so that the axial size of the stuffing box is shortened accordingly. 3. Material
(1) Stuffing box body material:
. Cancel the cast iron stuffing box and replace it with a carbon steel stuffing box. b. The stainless steel stuffing box part is divided into two types according to common conditions: 1 type 0Cr18Ni11Ti(321): type 00Cr17Ni14Mo2(316L). (2) Packing material Expanded polytetrafluoroethylene graphite packing is added to the original packing.
II. Determination of the main issues of the revision content
1. Shaft diameter series
The original standard shaft diameter series is: 30, 40, 450, +65, 480, *95.10, 30, a total of eight specifications. According to the solicitation of opinions, it is generally required to expand the range of shaft diameter series and increase the density of shaft diameter series. As for the shaft diameter series size of Φ30~100, it is the commonly used specification size of domestic mixing containers. The original standard shaft diameter specification in this area is one level every 15mm. According to the investigation, it is generally considered to be impractical and it is recommended to increase it appropriately. In addition, the maximum shaft diameter size of the original standard is 30, which also cannot meet the current requirements of large-scale equipment. Therefore, this standard shaft diameter series size appropriately increases the density of commonly used shaft diameter series sizes and expands the range of large shaft diameter series sizes. The shaft diameter series size of this standard is set at 10mm intervals from 30 to 100. The original standard 65 and 95 shaft diameters are too dense in series size, so we think they are unnecessary and have been cancelled in this compilation. For shaft diameters above 00, the size is expanded from 130 to 60 in this compilation based on solicited opinions to meet the requirements of large-scale equipment. 2. Pressure
According to a large amount of data statistics, most of the stirring containers used in the domestic chemical, pharmaceutical, dye, light industry and other industries generally have an operating pressure of <0.6MPa, the operating pressure of the polymerization reactor in chemical synthesis and petrochemical production is usually in the range of 0.6~1.0MPa. In addition, the operating pressure of some high-pressure stirred reactors in chemical plants can reach 5~7MPa, but the number of such reactors is very small, and the sealing requirements are strict, and they must be sealed with special structure packing or mechanical seals to ensure. This standard is considered to meet the common range, and this compilation is still maintained in the original standard pressure range, that is, PNO.6 and normal pressure packing box. The allowable operating pressure of PNO.6 packing box is used in occasions of 0.03~0.6MPa. The normal pressure packing box allows the operating pressure to be used in occasions <0.1MPa. 3. Temperature
The operating temperature of the stuffing box should be mainly determined by the temperature resistance of the packing and the allowable temperature of the stuffing box material itself. However, in fact, it is difficult to determine the allowable temperature range strictly speaking, because after the stuffing box compresses the packing in the operating state, the heat is generated between the packing and the shaft and the axial direction due to friction, and the shaft surface temperature and the temperature of the packing contact surface cannot be calibrated with quantitative data. If the selected packing has poor characteristics, the rotation trajectory speed is too high, the assembly is inaccurate, and the contact surface lubrication between the shaft and the packing is not good, it is bound to cause excessive temperature rise between the packing and the shaft, causing serious wear of the shaft and burning of the packing, resulting in seal damage. This standard takes into account the above comprehensive factors and the current status of domestic packing (there are 49
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