This standard specifies the type, size, technical requirements and relevant use regulations of stainless steel raised face welded ring steel pipe flanges. This standard is applicable to stainless steel raised face welded ring steel pipe flanges with nominal pressure PNO.6MPa (6bar) ~ 4.0MPa (40bar) for stainless steel pipes. HG 20527-1992 Stainless steel raised face welded ring steel pipe flanges HG20527-1992 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of Chinawww.bzxz.net
Stainless steel raised face welding ring steel pipe flange
HG 20527 --- 92
Editor:
Equipment Design Technology Center Station of Ministry of Chemical Industry
Zhehui Ruian Pressure Vessel Manufacturing Factory
Ministry of Chemical Industry
Approval Department:
Effective Date: May 1, 1993
Engineering Construction Standard Editing Center of Ministry of Chemical Industry
1 Subject Content and Scope of Application
This standard specifies the types, dimensions, technical requirements and relevant use regulations of stainless steel raised face welding ring steel pipe flanges.
This standard is applicable to stainless steel raised face welded ring steel pipe flanges with nominal pressure PNO.6MPa (6bar) ~ 4.0MPa (40bar) for stainless steel pipes (Note). Note: The types and sizes of raised face welded ring loose sleeve steel pipe flanges in this standard (LJ type) are also applicable to other non-ferrous metal pipes with the same outer diameter specifications, but the pipe wall thickness S should be calculated for strength. HGJ15
Referenced standards
《Regulations on the Selection of Materials for Steel Chemical Containers》HGJ66.《Technical Conditions for Steel Pipe Flanges》HGJ67《Pressure-Temperature Grades for Steel Pipe Flanges》《Dimensions of Welded Joints and Grooves for Steel Pipe Flanges》HGI 68
《Steel Pipe Flange, Gasket, Fastener Selection Regulations》HGI76
3 Types and Sizes
According to the combination of stainless steel butt welding ring and flange, there are two types: loose sleeve (LI type) 3.0.13
and flat welding (SO type).
3.0.1.1 Loose sleeve flange with nominal pressure PN0.6MPa (6bar) ~ 1.6MPa (16bar) is plate flange.
3.0.1.2 Nominal pressure PN2.5MPa (25bar) ~ 4.0MPa (40bar) ) is a loose-fitting flange with a neck.
3.0.2 The types and dimensions of stainless steel raised face welded loose-fitting steel pipe flanges shall be in accordance with the provisions of Figures 3.0.2-1, 3.0.2-2 and Tables 3.0.2--1 to 3.0.25. Loose-fitting plate type (PNO.6 to 1.6 MPa)
Figure 3.0.2-1 Stainless steel raised face welded loose-fitting plate type steel pipe flange (LJ-P type) 3
Loose-fitting neck (PN2.5 to 4.0 MPa)
Figure 3.0.2-2 Stainless steel raised face welded loose-fitting neck steel pipe flange (LJ-N type)
Flange thickness
3 Road 82
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Building City Test
Flange thickness
B Road BB
Flange thickness
8:8226
3.0.3 The types and dimensions of stainless steel raised face welded ring flat welded steel pipe flanges (SO type) shall be in accordance with the provisions of Figure 3.0.3 and Tables 3.0.3-1 to 3.0.3-3. 3.0.4 The thickness S of the welded ring flange shall not be less than the value S listed in the table. According to user requirements, both (LJ type) and (SO type flanges can be used without The same as the thickness S and height h of the butt welding ring recommended in this standard, but it should be noted when ordering. The selection of S value is generally the same as the wall thickness of the matching steel pipe. The determination of H value should take into account the distance between the butt welding ring and the steel pipe, flange or cylinder body. 5 Vent holes
Figure 3.0.3 Stainless steel raised face flat welded steel pipe flange (SO type) Note: ①No groove is opened on the flange plate of PN0.6~1.0MPa. ②The position of the unobstructed vent hole is determined by yourself.
③R1 is the fillet of the inner edge of the flange and the outer side of the butt welding ring respectively. 10
Flange thickness
64 code 28
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