This standard specifies the types and dimensions of concave and convex face flat welded steel pipe flanges with nominal pressure PN 1.6, 2.5, 4.0 MPa and nominal pressure PN 5.0, 11.0, 15.0, 26.0 MPa. This standard applies to concave and convex face flat welded steel pipe flanges with nominal pressure PN1.6 to PN26.0 MPa. GB/T 9116.2-2000 Concave and convex face flat welded steel pipe flanges with neck GB/T9116.2-2000 Standard download decompression password: www.bzxz.net

1 Scope
National Standard of the People's Republic of China
Hubbed slip-on-welding steel pipe flangeswithmaleand female face
GB/T 9116.2—2000
Replaces GB/T9116.11~9116.15—1988This standard specifies the types and dimensions of hubbed slip-on-welding steel pipe flanges with male and female face with nominal pressure PN of 1.6, 2.5, 4.0MPa and PN of 5.0, 11.0, 15.0, 26.0MPa. This standard applies to hubbed slip-on-welding steel pipe flanges with male and female face with nominal pressure PN1.6~PN26.0MPa. 2 Referenced StandardsbzxZ.net
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When this standard is published, the versions shown are all valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T9112-2000 Types and parameters of steel pipe flanges GB/T9124-2000 Technical conditions for steel pipe flanges 3 Types and sizes of flanges
3.1 The types of PN1.6, PN2.5 and PN4.0MPa concave and convex face with neck flat welding steel pipe flanges shall comply with the provisions of Figure 1, and the dimensions shall comply with the provisions of Tables 1 to 3.
3.2 The types of PN5.0, PN11.0, PN15.0 and PN26.0MPa concave and convex face with neck flat welding steel pipe flanges shall comply with the provisions of Figure 2, and the dimensions shall comply with the provisions of Tables 4 to 7.
4 Technical requirements for flanges
4.1 The technical requirements for flanges shall comply with the provisions of GB/T9124. 4.2 The maximum non-impact working pressure of the flange at different temperatures shall comply with the provisions of Appendix A (Standard Appendix) of GB/T9124-2000.
The welding joint type and groove size of the flange shall comply with the provisions of Appendix B (Suggestive Appendix) of GB/T9124-2000. 5 Marking
5.1 The flange shall be marked according to the nominal diameter, nominal pressure, sealing surface type code, matching steel pipe series code (the matching metric pipe code is "Series I", and the matching British pipe is not marked) and the standard number. 5.2 The type code of the flange sealing surface shall comply with the provisions of GB/T9112. 5.3 Marking example
Convex face flat-welded steel pipe flange with neck with nominal diameter of 80 mm and nominal pressure of 4.0 MPa (40 bar) (for metric pipe): flange DN80-PN40M (Series I) GB/T9116.2-2000Concave face flat-welded steel pipe flange with neck with nominal diameter of 80 mm and nominal pressure of 5.0 MPa (50 bar) (for imperial pipe): flange DN80-PN50F GB/T9116.2—2000 Approved by the State Administration of Quality and Technical Supervision on September 28, 2000 Implementation on July 1, 2001
GB/T9116.2—2000
Figure 1 Concave and convex surface (MF) with neck flat welding steel pipe flange (applicable to PN1.6, PN2.5 and PN4.0MPa) Nominal
Series 1
Series 1
GB/T9 116.2—2000
PN1.6MPa(16bar) concave and convex surface with neck flat welding steel pipe flange joint size
bolt hole
center circle
sealing surface
use PN4.0MPa size
flange neck
series 1
series I
series 1
series 1
series 1
series 1||tt| |Series 1
Bolt hole
Center circle
GB/T9116.2—2000
PN2.5MPa (25bar) concave and convex surface with neck flat welding steel pipe flange Table 2
Use PN4.0MPa size
Flange neck
Series 1
Series I
Series 1
Series 1
Series 1
Series I
GB/T9116.2—2000
Table 3PN4.0MPa (40bar) concave and convex surface with neck flat welding steel pipe flange connection size
bolt hole
center circle
flange neck
Series 1
Series I
Series 1
Series 1
GB/T9116.2— 2000
Figure 2 Concave and convex surface (MF) with neck flat welding steel pipe flange (applicable to PN5.0, PN11.0, PN15.0 and PN26.0MPa) Nominal
GB/T9116.2—2000
Table 4 PN5.0MPa (50bar) concave and convex surface with neck flat welding steel pipe flange connection dimensions
Bolt hole
Center circle
Dense Cover
Flange neck
GB/T9116.2—2000
5PN11.0MPa(110bar)Concave and convex surface with neck flat welding steel pipe flange connection size
Bolt hole
Center circle
Sealing surface
GB/T9116.2—2000
6PN15.0MPa（150bar）Concave and convex surface with neck Flat welded steel pipe flange table 6
bolt hole
center circle
sealing surface
use PN26.0MPa size
GB/T9116.2—2000
7PN26.0MPa260bar) Concave and convex flat welded steel pipe flange with neck table 7
connection size
bolt hole
center circle
sealing surface
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