HG/T 2050-1991 Glass-lined equipment gasket HG/T2050-1991 standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Glass Equipment
Subject Content and Scope of Application
HG/T2050-91
This standard specifies the type, basic parameters, main dimensions and technical requirements of gaskets used for glass equipment, manholes, nozzles, pipes and pipe fittings.
This standard is applicable to glass equipment, manholes, nozzles, pipes and pipe fittings with a nominal pressure less than or equal to 1.0MPa and a medium overflow higher than -20C and lower than or equal to 200C
2 Reference Standards| |tt||Carbon structural steel
JC210Asbestos cloth
ZBG33004Polytetrafluoroethylene film
3Types, basic parameters and main dimensions
3.1Gaskets for flange connection of type A pond glass equipment shall be in accordance with the provisions of Figure 1 and Tables 1 and 2,AA
pN0.25MPa
Approved by the Ministry of Chemical Industry of the People's Republic of China on July 6, 199120
Implementation on January 1, 1992
Nominal diameter
Inner gasket Sheet
Outer layer
Corrugated ring
Standard number
ZBG33004
HG/T2050-91
Table 1 Detailed list
Class 1 - Butyl rubber
Class II - Rubber-containing asbestos braid
Polytetrafluoroethylene film
Q235-A·F
Table 2 Dimension table
For gaskets with rubber as inner pad
Gasket thickness S
Class 1 material
Nominal Pressure PN, MPa
3.2For Type B glass pipe mouth, gaskets for connecting pipes and fittings shall be as specified in Figure 1, Table 1 and Table 3, 1.0
Class II materials
Nominal diameter
HG/T2050-—91
Table 3 Size table
Gasket thickness S
Class I materials
Nominal pressure PN, MPa
Class II materials
3.3For Type C pond glass equipment oval manhole gaskets for connection, please refer to Figure 2 and Table 1 and Table 4. The gaskets for connecting circular manholes shall be in accordance with the provisions of Figure 1, Table 1 and Table 4.
PN-0.25MPE
Nominal diameter DN
250×350
300×400
Oval manhole
HG/T2050
Table 4 Dimension table
Circular manhole
3.4D type According to the gaskets for connecting glass tower sections, they shall be in accordance with the provisions of Figure 1 and Table 1 and Table 5. Table 5 Dimension table
Nominal diameter
Gasket thickness S
Class I material
Nominal pressure PN, MPa
Gasket thickness S
Class I material
Class II material||tt ||Class II materials
Nominal pressure PN, MPa
3.5" mark
Marking example:bzxz.net
HG/T2050-91
The gasket material is rubber-containing asbestos braided fabric wrapped with polytetraethylene, used for pond glass equipment, with a nominal pressure of 0.25MPa and a nominal diameter of 500mm
Marking: Gasket.AⅡPN0.25DN500HG/T2050--91 Technical requirements
4.1 Materials
Class I materials - The inner gasket is nitrile rubber, with an applicable temperature of less than or equal to 120C. When other rubber products with an applicable temperature of 120℃ to 200c are selected as the inner sheet, the gasket performance parameters m , y value should be close to that of nitrile rubber inner gasket
Class II material inner gasket is rubber-containing asbestos braid, and the suitable temperature is less than or equal to 200℃. The rubber content of Class I rubber inner gasket is about 50%, and its hardness should be selected according to the different pressure and temperature of the medium. Shore A hardness of 60~70.
Class II rubber-containing asbestos braid inner gasket, the asbestos fiber of its asbestos cloth should be thin and long, generally using SB-32 type flat twill asbestos cloth, and the test and acceptance shall be carried out according to the relevant provisions of JC210. ​​The rubber (natural rubber or nitrile 26) ratio in the rubber coating layer of the inner gasket shall not be less than 70%
4.2 The material of the polytetrafluoroethylene outer layer shall be in accordance with the relevant provisions of ZBG33004, 4.3 For nominal pressure The rubber inner gasket with an embedded steel corrugated ring of 1.0MPa shall not have delamination on the inner side. 5 Packaging and storage
5.1. Gaskets should be wrapped with soft objects in a certain quantity and the sealing surface should not be scratched. 5.2 A packing list and product certificate should be attached when packing. 5.3 Gaskets should be stored indoors.
Additional instructions:
This standard was proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Glass Equipment. This standard was drafted by the Shanghai Pharmaceutical Design Institute of the State Drug Administration. The main drafters of this standard are Li Yijun, Hua Qiuyuan and Bao Aiyuan. This standard refers to the German national standard DIN28148-1985 "Tetrafluoroethylene lined gaskets for glass mixing vessels"
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