This standard specifies the type, size and technical requirements of flexible graphite composite gaskets for steel pipe flanges (European system). This standard applies to flexible graphite composite gaskets for steel pipe flanges with a nominal pressure PN of 1.0 MPa (10 bar) - 6.3 MPa (636 ar) as specified in HC*2 0592. HG 20608-1997 Flexible graphite composite gaskets for steel pipe flanges (European system) HG20608-1997 Standard download decompression password: www.bzxz.net

Flexible graphite composite gaskets for steel pipe flanges (European system)
HG20608-97
1·Subject content and scope of application
This standard specifies the type, size and technical requirements of flexible graphite composite gaskets for steel pipe flanges (European system). This standard applies to flexible graphite composite gaskets for steel pipe flanges with a nominal pressure PN of 1.CMPa (10mt) ~ -t.3MPa (63har) as specified in HC:20592. 193
GB 2520
GB3280
273122012
ZH1 29015
HTC: 20592
Referenced standards
(Electroplated tin plate and steel strip
Stainless steel cold-rolled plate
"Test method for compression rate and elasticity of stainless steel plate" "Technical conditions for condensable steel strip for metallographic winding" "Types and parameters of steel pipes (European system)" 3 Conditions for use of gaskets
3.0.1 The nominal pressure range of gaskets for flanges with different sealing surfaces is shown in Table 3.0.1 Table 3.0.1 Nominal pressure range of gaskets for flanges with different sealing surfaces Sealing type
Back
Leakage surface
Maximum working humidity of gaskets is shown in Table 3.0.2
Nominal pressure PMNPe(har)
1. 0~-6. 3t10--63?
1. 0~-6. 3610-63
1. 1~- f. 3(17-~3)
Table 3.0.2 Maximum operating temperature of gasket
World plate edging material supplier (code)
Low carbon copper (St)
UCr18Ni9(04)
Note: square core plate material can also be used. Please pay attention to the order when ordering. It is mostly used for oxidizing media. ≤150 core
Relatively speaking:
4 Gasket type and size
Flexible graphite composite gasket is a composite of punched or punched metal core plate and expanded graphite particles. 4. 0.1
4.0.2 Gasket types are divided into RF type, MFM type and TG type, which are suitable for raised face, convex face and machine groove face flanges respectively, as shown in Figure 4.0.2. According to the needs, RI type gaskets can be provided with stainless steel or carbon steel inner edging (RF-F type), as shown in Figure 4.0.2. 4.0.3 Gasket size
The size of RF type and RF-E type gaskets for raised face flanges shall be specified in Table 4.0.3-1. 1
2 The size of MFM type gaskets for concave and convex face flanges shall be specified in Table 4.0.3-2. The size of TG type gaskets for groove face flanges shall be specified in Table 4.0.3-3. 3
The gasket sizes listed in Tables 4.0.3-1 to 3 are suitable for steel pipes of the two outer diameter series A and B listed in HG20592. tt||Pipe flange:
5 The inner diameter Dmm of the gasket listed in Table 4.0.3~1~2 is applicable to: ·General situation. It can also be modified according to needs, and the inner diameter after modification should be indicated when ordering. D
a.RF type, MFM type, TG type gasket (sinus face, concave and convex face, rod replacement face) D
5.RF-E type gasket (raised face, with inner edge) Figure 4.2 Gasket type
RF and RF-type gasket size for raised face flange 4.0.31
Nominal iEJPN.MPatbe
These gasket outer diameters
Nominal diameter
Nominal diameter
2 MFM type gasket size for concave and convex face flange
Table 4. 3--2
Gasket outer diameter
Gasket inner diameter
For flange with groove surface:TG type gasket size
Table 4.0.3-3
Gasket inner diameterbzxZ.net
Gasket outer diameter
Gasket thickness
Gasket thickness
5 Technical requirements
5.0.1 The physical and mechanical properties of the plate material and the accumulated layers shall comply with the provisions of ZBI22019. 5.0.2 The compression rate and rebound rate of the material shall be determined in accordance with the provisions of ZBJ22072 (the pressure head diameter is .4mm, and the total load is 1510N). The performance shall comply with the provisions of Table 5.0.2. Table 5.2 Compression rate and rebound rate indicators of composite plates
Rebound rate, rebound ... 3:25
Tunnel end
Table 5.0.4 Size limit deviation of MFM and TG gaskets Nominal diameter
Inner diameter D,
Limit deviation
Limit spacing
≤.0.5 Thickness limit deviation of 1.5nm gasket is +C.1Gim1m, thickness limit deviation of 3nm gasket is 0.20rum Figure-Chu The thickness difference of the gasket should not be greater than Q.20mm, 5.0.6 The surface of the heat plate should be flat, without warping and deformation, and no obvious impurities, cracks, wrinkles, scratches, etc. are allowed. Cut to the edge. The metal core board should have good bonding with the flexible stone layer. 5.0.7 The gasket should be made of a whole composite board. For gaskets with an outer diameter greater than 1000mm, if arch joints are prepared, the buyer's consent should be obtained. 199
Marking and packaging
6.0.1 Gaskets should be packaged according to type, specification and material, and a product quality inspection certificate should be attached when delivered. The gasket should be labeled with the content specified in 6.0.2. 6.0.2 Marking example
Flexible graphite composite gasket for grooved flange with nominal diameter of 100mm, nominal pressure of 2.5MPa (25har), and core material of low carbon steel, is marked as:
HG 20608
Graphite composite gasket
100-2.5
Flexible graphite composite gasket with inner hemming for raised face flange with nominal diameter of 200mm, nominal pressure of 4.0MPa (40bar). Core material of Cr18Ni9 is marked as: HG20608
Graphite composite gasket
Additional instructions: Proposer, editor and main drafter of this standard Proposer: Equipment Design Technology Center Station of Ministry of Chemical Industry Chemical Process Piping Design Technology Center Station of Ministry of Chemical Industry Editor: Equipment Design Technology Center Station of Ministry of Chemical Industry Main drafter: Ying Daoan Yuanjun
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