HG 20632-1997 Toothed Combination Gasket for Steel Pipe Flange (American System) HG20632-1997 Standard download decompression password: www.bzxz.net

Serrated combination gaskets for steel pipe flanges (American system) HG 20632-97 1 Subject content and scope of application This standard specifies the types, dimensions and technical requirements of serrated combination gaskets for steel pipe flanges (American system). This standard is applicable to serrated combination gaskets for raised face butt-welded steel pipe flanges and integral steel pipes with a nominal pressure PV of 5.0 MPa (Class 300) to 42.0 MPa (Class 2500) as specified in HG20f15. 465
GB 4237
HG20615
ZBG33092
ZBI22019
Cited standards
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&Types and parameters of steel pipe flanges (American system)》"Polyvinyl fluoride sheets"
"Technical conditions for flexible graphite tape for Jinchu spiral wound gaskets" 3 Conditions for use of gaskets
The maximum working temperature of the gasket shall be in accordance with the provisions of Table 3-1. Table 31 Highest working temperature of gasket
Metal gear nylon ring material
15 or [8
OCr1&Ni9 or
(Cr17Ni12Mo2
GB 711
GB4237
10 or 08
304 or
Flexible graphite
Flexible graphite
Flexible graphite
Polytetrafluoroethylene
Cover material
ZBJ22019
ZLG 33002
Note: Other toothed rings and covering materials may also be used, but this should be stated when ordering. 450°C is required for use in oxidizing media.
Maximum operating temperature
4 Gasket type and size
4. Non-metallic flat gasket materials such as flexible graphite or polytetrafluoroethylene sheets are combined on the upper and lower surfaces of the gasket, as shown in Figure 4.0.1.
4.0.2 Gasket size is in accordance with Table 4.0.2
Enlarged view of tooth shape
Figure 4.D.1 Type of seal (RF)
Note: The outer surface of the seal can be integral or inlaid with other materials. 468
Nominal diameter
Geared ringGeared ring
82-5 101.5
98. 4 :123.8
123.8.154.0
150.8:182.6
177. 8:212. 7
228+6266.7
Table 4.0.2 Gasket size
Nominal pressure, MPa(ClHss)
(Class
(Cla6s
(Class
Outer diameter D3
837.5900.5
(Clasr
Toothed ring
Coating
Technical requirements
5.0.1 The limit deviation of the size of the gasket shall be as specified in Table 5.0.1. 5.0.2 The limit deviation of the parallelism of the two surfaces of the metal toothed ring shall not exceed 0.05mm for every 100mm diameter length. 5.0.3 The top plane of the metal toothed ring shall be ground, and its surface roughness shall not exceed Ra3.2. 5.0.1 Potential Dimensions of the gasket: Limit deviation
Inner and outer diameter of the gasket, D
Limit deviation
Outer ring outer diameter D
Limit deviationwwW.bzxz.Net
5.0.4 The metal toothed ring shall be made of a whole steel plate, and welding is not allowed. 470
Thickness T
Limit deviation
Marking and packaging
6.0.1 Gaskets shall be packaged according to type or specification and material, and a product quality inspection certificate shall be attached upon delivery. The gasket shall be stamped with the contents specified in 6.0.2 on the outer ring. 6.0.2 Marking contents
（1）Standard number (HG20632),
（2）Nominal diameter (nmm):
（3）Nominal pressure (MPa)
4)Material code (see Table 3-1).
6.0.3 Marking example
Nominal diameter 100mm, nominal pressure 5.0MPa (Class 300), 10# steel covered flexible graphite toothed composite gasket. Its mark is:
HG 20632
Toothed gasket
100—5.0
Nominal diameter 30mm, nominal pressure 15.0MPa (Class900), 0Cr18Ni9 covered with polytetrafluoroethylene toothed combination gasket, its mark is:
HG20632
Toothed gasket
300—15.0
Additional instructions: The proposing unit, chief editor unit and main drafter of this standard 304F
Proposing unit: Chemical Process Piping Design Technology Center Station, Ministry of Chemical Industry Equipment Design Technology Center Station, Ministry of Chemical Industry
Chief editor unit: Equipment Design Technology Center Station, Ministry of Chemical Industry Main drafter Ying Daoguao Yu Jun
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