This standard specifies the type, size and technical requirements of toothed combination gaskets for steel pipe flanges (European system). This standard is applicable to toothed combination gaskets for raised face, concave and convex face butt welding steel pipe flanges and integral steel pipe flanges with a nominal pressure PN of 1.6M Pa (16 bar) ^ -20.0 A IPa <2,; O bar) as specified in HG2 0592. HG 20611-1997 Toothed combination gaskets for steel pipe flanges (European system) HG20611-1997 Standard download decompression password: www.bzxz.net

Serrated combination gaskets for steel pipe flanges
(European system)
HG20611--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 (European system). This standard is applicable to serrated combination gaskets for raised face, convex face butt-welded steel pipe flanges and integral steel pipe flanges with a nominal positive force PN of E.MPa (1Gbar) to ~25.MPa (250bar) specified in HG20592. 217
GB 711
GB 4237
HG 20592
ZBG33002
ZBI22019
Cited standards
High-quality carbon structural steel hot-rolled thick plates and wide steel strips》"Hot-rolled stainless steel plates"
Types and parameters of steel pipe flanges (European system)》"Polytetrafluoroethylene sheets"
"Technical conditions for flexible stone tapes for metal spiral wound gaskets" 3 Gasket use conditions
The maximum working temperature of the gasket shall be in accordance with the provisions of Table 3-1. Table 31
Jinping tooth color ring material"
10 or 08
[Cr18Ni9 or
OCr17Ni12Mo2
GB 711
CB4237
10 or 08
304 or
Maximum working temperature of gasket
Covering material
Flexible stone
Flexible stone
Flexible stone jade
Polytetrafluoroethylene
ZBJ 22019
ZBG 33002
Note: 1) Other toothed rings and covering materials may also be used, which should be stated when purchasing. 450℃ when used in oxidizing media.
Maximum working temperature
Gasket type and size
4.0.1 Gaskets are made of metal toothed rings and non-metallic flat materials such as flexible graphite or polytetrafluoroethylene sheets on the upper and lower surfaces, as shown in Figure 4.1.
4.0.2 Gaskets are divided into RF type and MFM type, which are suitable for raised face and concave and convex face flanges respectively, as shown in Figure 4.0.1. 4.0.3 Gasket size
1 The size of RF type gaskets for raised face flanges shall be in accordance with the provisions of Table 4.0.31. 2 The size of MFM type gaskets for concave and convex face flanges shall be in accordance with the provisions of Table 4.0.3-2. 3 The gasket sizes listed in Table 4.0.3-1~2 are suitable for steel pipe flanges of the two steel pipe outer diameter series A and B listed in IIG20592.
a. RF type
Toothed enlarged ring
Type of gasket
Figure 4.0.1
Note: The outer ring of the seal can be made of a whole or other materials. 221
Toothed ring
Toothed ring
109 core
Table 4.(.3-1 RF type gasket dimensions for raised face flanges Nominal pressure, MPa (har)
1 2170 :
(63) 1(19021(1602(250)
Outer ring outer diameter 5
Toothed ring
Table 4.0.3-2
Toothed ring
Dimensions of MFM type gaskets for concave and convex flanges
Toothed ring
Note: The nominal pressure of the convex flange is PN16, OMPa. Toothed ring
Secreting cover
Technical requirements
5.0.1 The dimensional limit deviation of the gasket shall be as specified in Table 5.0.1. 5.0.2. The two surfaces of the metal toothed ring The limit deviation of parallelism is no more than 0.05mtl.5.0.3 The top plane of the metal toothed ring should be ground, and its surface roughness should not be greater than Ra3.2. Table 5..1 The size limit deviation of the gasketbzxZ.net
Toothed ring inner diameter
Limit deviation
Toothed ring outer diameter D2
Limited deviation
Outer ring outer diameter D:
Limit deviation
The metal toothed ring should be made of a whole steel plate, and welding is not allowed. Thickness
Limit deviation
6 Marking and packaging
6.0.1 Gaskets shall be packed according to type, specification and material, and shall be accompanied by a product quality inspection certificate upon delivery. RF type gaskets shall be marked with a steel stamp on the outer ring, and MFM type gaskets shall be marked with a label indicating the contents specified in 6.0.2. 6.0.2 Marking contents
(1) Standard number (HG20611)
(2) Nominal diameter (mm);
(3) Nominal pressure (MPa);
(4) Material representative see Table 3 —1),
6.0.3 Marking example
No. 10 steel covered flexible graphite toothed group gasket for raised face flange with nominal diameter of 10omm and nominal pressure of 6.3.MPa (63bar), its marking is:
HG20611
Toothed gasket
Nominal diameter of 200mm. Nominal pressure of 16.0MPa (160bar) 0Cr18Ni9 covered polytetrafluoroethylene toothed combination gasket for concave and convex face flange, its marking is:
HG 20611
Toothed gasket
Additional instructions: The unit proposing, editing unit and main drafter of this standard Proposing unit: Equipment Design Technology Center Station of Ministry of Chemical Industry 304F
Chemical Process Piping Design Technology Center Station of Ministry of Chemical Industry Chief editor: Equipment Design Technology Center Station of Ministry of Chemical Industry Main drafters: Ying Yan, Yu Jun
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