This standard specifies the type, size and technical requirements of metal-clad gaskets for steel pipe flanges (European system). This standard applies to metal-clad gaskets for raised face steel pipe flanges with a nominal pressure PN of 2.5 MPa (2.5 bar) to 10.0 MPa (1.00 bar) as specified in HG 20592. HG 20609-1997 Metal-clad gaskets for steel pipe flanges (European system) HG20609-1997 Standard download decompression password: www.bzxz.net

Metal-clad gaskets for steel pipe flanges (European system)
H 20609-97
1 Subject content and scope of application
This standard specifies the type, size and technical requirements of metal-clad gaskets for steel pipe flanges (European system). This standard applies to metal-clad gaskets for raised face steel pipe flanges with a nominal pressure PN of 2.MPa (25har) ~ 10.DMPa (10nhar) as specified in HG 20592. 201
GB 710
GB 2040
GB 2518
GB2520
G3 3280
GB3880
GB3985
GB/T 15601
HG 20592
Referenced standards
Metal bending test method》
High-quality carbon structural steel hot-rolled thin plate and steel strip》"Pure copper plate"
"Continuous hot-dip galvanized thin steel pole and steel strip"
"Electroplated steel plate and steel strip"
"Stainless steel cold rail rust plate"
"Aluminum and aluminum alloy plate"
"Stone ladder rubber plate
"Metal clad plate for pipe flange"
&Steel pipe flange type, parameters ( European system)》：3 Gasket use conditions
The maximum working leakage of the gasket is determined according to Table 3-1 Table 31 Maximum working temperature of the gasket
Insulation material
Pure plate 13
Copper electrode 13
Tinned thin steel plate
Minhua steel plate
nGri8Ni9
o0Cr19Ni10
O0C:17N14M9
GR204N
GB 2320
G 2518
GH 328C
Note: Other materials may also be used. The name should be clearly stated when ordering.
Filling material Note:
Steel rubber section
GB3455
Maximum working viscosity
Gasket type and size
4..1 The type and size of the seal shall be in accordance with the provisions of Table 4.0.1 of Figure 40.1. 4.0.2 The seal sizes listed in Table 4.0.1 are applicable to the steel flanges of the A and B steel pipe outer diameter series specified in HG20592.
Figure 4. Types of core gaskets
Table 4. Dimensions of non-core gaskets
Male force FN.MPat bar
10.0(100)
5 Technical requirements
5.0.1 The mechanical properties and chemical composition of the coating material shall comply with the requirements of the relevant standards, and its hardness value shall be as specified in Table 3.0.1.
Table 5.0.1
Metallic materials for cladding layer
Tin-plated sheet
Galvanized sheet
Q0C19N:10
O:r17Ni14Mo2
Hardness of cladding layer material
St(Sn)
St(Zn)
5.0.2The thickness of the cladding layer metal material shall not be less than 0.2mmrm, hardness HBrk
5.0.3The filling material is asbestos rubber sheet, and its technical performance index shall comply with the provisions of XB450 or XB350 in GB3985. If the purchaser has special requirements, other suitable materials may be used, but it should be noted when ordering. 5.! .4The metal material of the cladding layer is generally a whole metal plate. If splicing is required, the number of splicing joints shall not exceed 3. The plate edge at the folding point should be cut into 15° and chlorine arc welding or gas welding should be used. The joint weld must be polished flush with the parent material. The weld is subjected to cold bending test according to the provisions of CB232. The bending radius is 1.5mm and the bending angle is 180. No cracks should appear at the weld of the cold bending specimen. 5.0.5 The limit deviation of gasket size is as specified in Table 5.0.5. Table 5.0.5 Limit deviation of gasket size
Nominal diameter
Limit deviation
Limit deviation
The filling material should be filled evenly with materials of the same thickness, and the thickness should be consistent over the entire section. 5.. 6
The seal should be smooth and the table should not have radial penetration scratches, pressure and concave defects that affect the sealing performance. The positive shrinkage rate, elasticity rate, stress relaxation rate and leakage rate of the gasket should comply with the provisions of GB/T15601. 205
Marking and packaging
6.0.1 Gaskets shall be packed according to specifications and materials. A product quality inspection certificate shall be attached upon delivery, and each gasket shall be marked with the inner wear specified in 6.0.2.
6..2 Marking content
(1) Standard number (HC20609);
(2) Nominal diameter DN, I,
(3) Nominal pressure PN, MPa:wwW.bzxz.Net
(4) Code of metal material of coating layer, see Table 5.0.1;(5) Others (if other materials are used as filling materials)6.0.3 Marking example
Nominal diameter 10mm. Nominal pressure J41.0MPa (40bar) Metal-coated gaskets with aluminum coating layer shall be marked as:
HG 20609
Metal clad gasket
Nominal diameter 500mm, nominal pressure 2.5MPa (25bar), cladding layer metal material is 0Cr18Ni9 metal clad gasket, filling layer material is rubber sheet, marked as: HG 20609
Jinhai clad gasket
500—2. 5
304/rubber sheet
Additional instructions: The unit proposing, editing and main drafting of this standard Proposing unit: Equipment Design Technology Center Station of Ministry of Chemical Industry Chemical Process Piping Design Technology Center Station of Ministry of Chemical Industry Chief editing unit: Equipment Design Technology Center Station of Ministry of Chemical Industry Main drafting persons: Cheng Daoyan, Yu Jun
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