This standard specifies the type, size, technical requirements and relevant use regulations of stainless steel lined flange covers. This standard is applicable to stainless steel lined flange covers with nominal pressure PNO.6MPa (6bar) ~ 4.0MPa (40bar). HG 20529-1992 Stainless steel lined flange cover HG20529-1992 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
Stainless steel lined flange cover
HG20529-92
Editor: Equipment Design Technology Center of the Ministry of Chemical Industry Approval Department: Ministry of Chemical Industry Implementation Date: May 1, 1993
Engineering Construction Standard Editing Center of the Ministry of Chemical Industry
1993 Beijing
Subject Content and Scope of Application
This standard specifies the type, size, technical requirements and relevant use regulations of stainless steel lined flange cover.
This standard applies to stainless steel lined flange cover with nominal pressure PN0.6MPa (6bar) ~ 4.OMPa (4Obar) (Note).
Note: This standard is also applicable to vacuum environment. In addition to the technical requirements for fusion welding, this standard is also applicable to flange covers lined with other metal materials that can be fusion welded with carbon steel. 41
Referenced standards
HGI15 "Regulations on the selection of materials for steel chemical containers" HGJ66 "Technical conditions for steel pipe flanges"
HGJ67 "Pressure-temperature grades of steel pipe flanges" HGJ76 "Regulations on the selection of steel pipe flanges, gaskets and fasteners" JB/T4709 "Welding code for steel pressure vessels" 3 Types and sizes
Flange cover types include raised face (RF type), raised face (M type), and sample face (T type), as specified in Figure 3 and Tables 31 to 3-5.
DN150mm～250mm1 hole in the center
DN300mm~450mm4 holes
6 holes + 1 hole in the center
DN500mm~-600mm
Applicable to low carbon stainless steel lining
Applicable to ultra-low carbon stainless steel lining
Raised face (RF type) lining single flange cover (used with raised face flange) (a)
PN0.6--4.0MPaDN40mm--600mm
Figure 3 Stainless steel inner flange cover
(b) Face (T type) lining flange cover
(used with grooved face flange)
-PN1. 6-4. 0MPa
DN40mm--500mm
(c) Raised face (M type) lining flange cover
(used with concave flange)
PN1. 0--4. 0MPa
DN40mm~500mm
Continued Figure 3 Stainless steel lining flange cover
Note: ①M6 ventilation and inspection hole, position is self-determined. ②(RF type) lining flange cover is plug welded according to the requirements of Figure a-1 or a-2, and the surrounding fillet weld is performed. (T type) or (M type) lining flange cover is only subjected to the surrounding fillet weld. 45
Raised face of lining
0*6 section
Flange thickness
82#9*68
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Flange thickness
168911
Flange thickness
6891398
Flange thickness
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Flange thickness
正谢达探+得葡示量
4 Technical requirements
4.0.1 The technical requirements for stainless steel lined flange cover shall comply with the provisions of HGJ66 "Technical Conditions for Steel Pipe Flanges".
4.0.2 The lining layer and the flange cover shall fit tightly and be welded in accordance with the provisions of JB/T4709. The bottom welding materials of fillet weld and plug weld hole shall be selected according to the transition layer welding rod of HGJ15 "Provisions for the Selection of Materials for Steel Chemical Containers", and the surface layer welding materials shall be selected according to the cover surface welding rod, see the provisions of Table 4.0.2.
The height of the fillet weld leg is equal to the peripheral thickness of the lining layer, and the plug weld should be full. Plug welding requirements
Welding materials
Transition layer welding rod specified in HGJ15
Cover surface welding rod specified in HGJ15
Low carbon stainless steel lining
Bottom layer welding of plug weld hole
Surface layer welding of plug weld hole
Ultra-low carbon stainless steel lining
Parent material plug weld hole welding
Plug weld hole welding of lining layer
4.0.3 An M6 ventilation and inspection hole shall be opened on the flange cover, and the position shall be determined by the user. After plug welding, compressed air with a pressure not exceeding 0.1 MPa should be passed through for leak detection. Other sizes of inspection holes can also be opened according to the manufacturing conditions. 4.0.4 The limit deviation of the lining single layer thickness t is -1 mm.
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