HG 20623-1997 Large Diameter Steel Pipe Flange (American System) HG20623-1997 Standard download decompression password: www.bzxz.net

Large True Diameter Steel Pipe Flanges
(American System)
HG 20623—97
1 Subject Content and Scope of Application
This standard specifies the types, dimensions, technical requirements and relevant use regulations of large diameter steel pipe flanges (American System. This standard is applicable to large diameter steel pipes with nominal pressure PN2.0MPa (Clas150) ~ 15.0MPa (Clas990) Method 379
HC 20615
HG 20624
JG20625
HG20626
HG20634
HG20635
Referenced standards
《Types and parameters of steel pipe flanges (American system)》《Technical conditions for steel pipe flanges (American system)》《Pressure-temperature grades of steel pipe flanges (American system)》《Welding joints and groove dimensions of steel pipe flanges (American system)\《Fasteners for steel pipe flanges (American system)》《Selection regulations for steel pipe flanges, seals and fasteners (American system)》Flange sealing surface types and applicable scope||t t||3.0.1 The sealing surface type of the flange is the raised face (RF), and its size and selection shall comply with the provisions of Chapter 6 and Chapter 8 of HG20615. When PN≤5.0MPa(Class300), the raised platform height f1 of the raised face flange is included in the flange thickness C; when PN11.0MPa (Cla85600), the raised platform height f.m of the raised face flange is included in the flange thickness C. 3.0.2 The applicable pressure and diameter range of large diameter flanges shall comply with the provisions of Table 3.0.2. Table 3.2 Applicable range
Cover type
Raised face (RF)
(Class 150)
Nominal pressure PN, MPa(Class)
(lass sco)
N6501500
(CHass 6CO)
(Class sro)
DN650900
Flange size
Flange size is as specified in Figure 4-1 and Tables 41~4. Table 4-1PN2.0MPa(Class150) Large diameter steel flange Table 4-2PN5.0MPa(Class300) Large diameter steel pipe flange Table 4-3PN11.0MPa(Cias600) Large diameter steel pipe flange Table 1-1PN15.0MPa(Class 900) Large diameter steel pipe flange The flange inner diameter B is determined by the steel pipe wall thickness. The user should indicate the wall thickness or grade of the steel pipe in the order and marking. 382
PN5.0MPa Raised face (RF)
PN11.0MP Sinus face (RF)
Figure 4-1 Large diameter steel pipe flange (WN)
Nominal diameter
12221392
Jiang: Flange inner diameter Please order according to the requirements.
FN2.UMTa(Class 150) Large diameter steel pipe flange connection size
Screw hole center diameter
Table 4-2
Nominal diameter
Note: Nominal diameter Please order according to the requirements.
Bolt hole
Bolt hole
PV5.0MPa(Claxy300)Large diameter steel pipe flange connection size
Screw inspection hole
Center diameter
Screw light hole
Butterfly bolt hole
Flange neck
Nominal near diameter
Table 4-3
Note method "Inner diameter according to Jiang goods requirements.
PN11.0MIPn(CInss 60b) Connection size of large diameter steel pipe flange
Butterfly bolt hole
Center circle diameter
Screw hole
Bolt hole
M12×3
Table 4—4PN15.#MPa(Class900) Nominal diameter of large diameter steel pipe flange bzxZ.net
Sum: Flange inner diameter according to the requirements of the goods
Center circle diameter of the bolt hole
Connection size
Screw hole
Bolt hole
M70×3
M76×3
Honglan neck
Flange neck
5 Technical requirements
The technical requirements of the flange shall be in accordance with the provisions of HG20624. 6 Maximum non-impact working pressure
Nominal pressure of the flange The maximum non-impact working pressure at different temperatures shall be in accordance with the provisions of HG20625. 7 Welding joints and grooves
Method and welding joints and grooves of steel pipes shall be in accordance with the provisions of HG20626. 8 Fastener length
The length of the fasteners (bolts, studs) used 1 shall be in accordance with the provisions of Appendix A of HG20634, and the matching provisions
The matching of flanges, gaskets and fasteners shall be in accordance with the provisions of HG20G35. 10 Marking
The marking of flanges shall be in accordance with the provisions of HC20615.
Additional notes: The unit proposing, editing unit and main drafter of this standard Proposing unit: Chemical Process Piping Design Technology Center Station of the Ministry of Chemical Industry Equipment Design Technology Center Station of the Ministry of Chemical Industry
Editor: Equipment Design Technology Center Station of the Ministry of Chemical Industry Main drafter: Ying Daoyan Yu Jun
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