HG 20630-1997 Metal Jacketed Gaskets for Steel Pipe Flanges (American System) HG20630-1997 Standard download decompression password: www.bzxz.net

Metal-clad gaskets for steel pipe flanges
(American system)
HG20630-97
Subject content and applicable scope
This standard specifies the type, size and technical requirements of metal-clad gaskets for steel pipe flanges (American system). This standard is applicable to metal-clad gaskets for raised face steel pipe flanges with a nominal pressure PN of 5.0MPa (Class 300) to 15.0MPa (Class 900) as specified in HG20615. 445
GB 710
GB2040Www.bzxZ.net
GB2518
GB2520
GB3280
GB3880
GB3985
GB/T 15601
HG 20615
Referenced standards
Metal bending test method
"High-quality carbon structural steel hot-rolled sheet and strip"
"Pure copper plate"
Continuous hot-dip galvanized thin steel plate and strip"
"Electroplated tinned steel sheet and strip"
"Stainless steel cold-rolled steel sheet"
"Aluminum and aluminum alloy sheet"
"Asbestos rubber sheet"
"Metal-coated gasket for pipe flange"
"Pipe flange types and parameters (American system)" Gasket use conditions||tt| |The maximum working temperature of the gasket is specified in Table 3-1. Table 3-1 Maximum working temperature of the gasket
Clad metal material (industry)
Pure aluminum plate L3
Pure copper plate T3
Tin-plated plate
Galvanized thin steel plate
UCr18Ni9
r19Ni10
0Cr17Ni14Mo2
GB3880
GB2040
GB2520
GB2518
GL 710
GB3280
Note: Other materials can also be selected, but it should be specified when ordering. Name
Filling material Standard:
Asbestos rubber sheet
GB3985
Maximum working temperature
Gasket type and size
Gasket type and size refer to Figure 4-1 and Table 4-1~2 provisions D
Figure 41 Gasket type
Table 4-1
Nominal diameter
DN≤600mmDimensions of gold-plated sheathed gaskets for raised face flanges Gasket
Nominal pressure PN, MPatClass)
(Cless 300)
(Clasy 600)
Gasket outer diameter D
(ClaRs 90rb)
Table 4-2 Dimensions of metal cladding springs for raised face large diameter flanges DN>600mm Nominal diameter
13841-5
Nominal force FN, MPa(Cias)
(Class 300)
(Class 600)
Outer diameter of flange D
(Cas 900)
Technical requirements
The mechanical properties and chemical composition of the metal material of the cladding layer shall comply with the provisions of the corresponding standards. Its hardness value shall be in accordance with the provisions of Table 5.0.15. 0. 1
.
Table 5. . 1
Hardness of the coating material
Metal material of the coating
Tin-plated steel sheet
Galvanized steel sheet
oCr18Ni9
00Cr19Ni10
00Cr17Ni14Me2
St(Sn)
St(Zn)
5.0.2The thickness of the coating metal material shall not be less than 0.25mmHardness HB.um
5.0.3The filling material is asbestos rubber sheet, and its technical performance index shall comply with the provisions of XB350 of GB3985. If the purchaser has special needs, other suitable materials may also be used: but it should be noted when ordering5.0.4The coating metal material adopts a whole metal plate. If splicing is required, the number of splicing joints shall not exceed 3. The plate edge at the joint should be cut into 45\, and argon arc welding or gas welding should be adopted. The joint weld must be polished flush with the material. The weld is subjected to cold bending test according to the provisions of GB232. The bending radius is 1.5mm and the bending degree is 180°. No cracks shall appear at the weld of the cold bending specimen. 5.0.5 The limit deviation of gasket size shall be specified in Table 5.0.5. Table 5. Non.5 Limit deviation of gasket size
Nominal diameter
Limit deviation
Limit deviation
Limit deviation
The filling material shall be filled evenly with materials of the same sequence, and the thickness shall be uniform over the entire section. The gasket shall be flat and smooth, and the surface shall not have radial penetration scratches, indentations and uneven defects that affect the sealing performance. The compression rate, rebound rate, stress relaxation rate and sealing leakage rate of the gasket shall comply with the provisions of GB/T15601. 6
Marking and Packaging
6.0.1 Gaskets shall be packed according to specifications and materials and shall be accompanied by a product quality inspection certificate upon delivery. Each gasket shall be labeled with the contents specified in 6.0.2.
6.0.2 Marking
(1) Standard number (HG20630);
(2) Nominal diameter DN,tnt1
(3) Nominal pressure PN.MPa#
(4) Metal material code of the coating layer, see Table 5.(,1;(5) Others (if the filling material is other materials). 6.0. 3 Marking example
Golden Eagle coated gasket for raised face flange with nominal diameter of 100mm, nominal pressure of 5.0MPa (Class300), and aluminum coating metal material is used, its marking is:
Metal coated gasket
HG 20630
100-5.0L.3
Nominal diameter 700mm, nominal pressure 11.0MPa (Class600), cladding metal material 0Cr1.8Ni9 raised face large diameter flange metal coated gasket, filling layer material is rubber sheet, its mark is: HG 20630
Gold chip package micro pad
700--11.0
3047 rubber sheet
Nominal diameter 800mm, nominal pressure 15.0MPa (Class900), cladding metal material 00Cr17Ni14Mo2 raised face large diameter latent flange metal coated gasket, its mark is: HG 20630
Metal Jacketed Gasket
Additional Notes: Proposer, Editor-in-Chief and Main Drafters of this Standard Proposer: Chemical Process Piping Design Technology Center Station, Ministry of Chemical Industry Equipment Design Technology Center Station, Ministry of Chemical Industry
Editor-in-Chief: Equipment Design Technology Center Station, Ministry of Chemical Industry Main Drafters: Ying Daoyan Yu Jun
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