This standard specifies the types and dimensions of flat-face and raised-face steel pipe flanges with nominal pressures PN of 0.25, 0.6, 1.0, 1.6, 2.5 and 4.0 MPa. This standard applies to flat-face and raised-face steel pipe flanges with nominal pressures PN0.25 to PN4.0 MPa. GB/T 9119-2000 Flat-face and raised-face steel pipe flanges GB/T9119-2000 Standard download decompression password: www.bzxz.net

GB/T 9119—2000
This standard is a revised version of GB/T9119.1~9119.10-1988 "Flat and raised plate type flat welded steel pipe flanges". Based on the reference to ISO7005-1:1992 "Metal flanges Part 1: Steel flanges" and other international and foreign advanced standards, combined with domestic use experience, the original standard has been modified as follows: 1. The composition of the original standard has been greatly adjusted. From the original one flange type, one sealing surface type and one pressure level to form one standard, it has been changed to one flange type, two sealing surface types and all pressure levels to form one standard, thus compressing the original 10 standards into one.
2. The content of the original standard has been appropriately supplemented and expanded. The flange sizes of the original standard that belong to the European system are PNO.25, PNO.6, PN1.0, PN1.6, PN2.5 and PN4.0MPa, and are only applicable to the connection of "imperial pipes". The revised flange standard, in addition to adding the types and sizes of PN2.5 and PN4.0MPa flat flanges, also supplements the steel pipe sizes applicable to the connection of "metric pipes", expanding the scope of application of the standard. 3 Some dimensions in the original standard, such as the sealing surface height, have been appropriately modified according to ISO7005-1:1992. 4 The sealing surface "convex surface" in the original standard is changed to "raised surface", and the dimensions of flat and raised surface flanges are unified in one standard. The flange dimensions in this standard belong to the European flange system, and these flange dimensions are all in line with the flange dimensions of the corresponding pressure levels in Europe. The flange dimensions (series 1) in this standard are equivalent to the flange dimensions of IS07005-1:1992. The writing format of this standard is different from ISO7005-1:1992. The reason for adopting the current writing format is mainly to consider the convenience of use and the inheritance in the implementation of the standard.
This standard will replace GB/T9119.1~9119.10-1988 from the date of implementation. This standard is promoted by the National Pipeline Accessories Standardization Technical Committee. The drafting units of this standard are: Mechanical Science Research Institute, National Chemical Equipment Design Technology Center, Zhejiang Chaoda Valve Co., Ltd., Dajin Jinding Pipeline Co., Ltd.
The main drafters of this standard are: Li Junying, Yu Jun, Qiu Xiaolai, Wang Hanzhou, Min Zhiqing, Gao Deliang. This standard was first issued in 1988 and revised for the first time in 2000. 196
1 Scope
National Standard of the People's Republic of China
Slip-on-welding plate steel pipe flangeswith flat face or raised faceGB/T9119-2000
Replacement of GB/T9119.1～9119.10-1988
This standard specifies the types and dimensions of flat and raised plate steel pipe flanges with nominal pressure PN of 0.25, 0.6, 1.0, 1.6, 2.5 and 4.0MPa.
This standard applies to flat and raised plate steel pipe flanges with nominal pressure PNO.25PN4.0MPa. 2 Referenced Standards
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 versions 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 PNO0.25, PNO.6, PN1.0, PN1.6, PV2.5 and PN4.0MPa flat plate type flat welded steel pipe flanges shall comply with the provisions of Figure 1, and the sizes shall comply with the provisions of Tables 1 to 6. 3.2 The types of PNO.25, PNO.6, PN1.0, PN1.6, PN2.5 and PN4.0MPa raised plate type flat welded steel pipe flanges shall comply with the provisions of Figure 2, and the sizes shall comply with the provisions of Tables 1 to 6. 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.
4.3 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", and the matching British pipe code is not marked) and standard code 5.2 The type code of the flange sealing surface shall comply with the provisions of GB/T9112. 5.3 Marking examples
5.3.1 Marking examples for flat plate type flat welded steel pipe flanges Flat plate type flat welded steel pipe method with nominal diameter of 100 mm and nominal pressure of 2.5 MPa (25 bar) (equipped with metric pipe): flange DN100-PN25FF (Series I) GB/T9119-2000 Approved by the State Administration of Quality and Technical Supervision on September 28, 2000 and implemented on July 1, 2001
GB/T9119--2000| |tt||Flat plate type flat weld steel pipe flange with nominal diameter of 80mm and nominal pressure of 1.0MPa (10bar) (equipped with British pipe): Flange DN80-PN10FF GB/T9119-20005.3.2 Marking example of raised plate type flat weld steel pipe flange Raised plate type flat weld steel pipe flange with nominal diameter of 80rnm and nominal pressure of 2.5MPa (25bar) (equipped with metric pipe): Flange DN80-PN25RF (Series I) GB/T 9119-2000 Raised face plate type flat welded steel pipe flange with nominal diameter of 100mm and nominal pressure of 2.5MPa (25bar) (equipped with British pipe): Flange DN100-PN25RFGB/T9119-2000 Flat face (FF) plate type flat welded steel pipe flange
(Applicable to PN0.25, PN0.6.PN1.0, PN1.6, PN2, 5 and PN4.0 MPa)nx
Figure 2 Raised face (RF) plate type flat welded steel pipe flange (Applicable to PN0.25, PN0.6, PN1.0, PN1.6, PN2.5 and PN4.0 MPa)198
Steel pipe outer diameter
Series 1
GB/T9119—2000
PNo.25MPa(2.5bar)Flat and raised plate type flat welded steel pipe flange connection dimensions
Series I
Bolt hole
Center circle
Use PNO.6MPaFlange size
Sealing surface
Flange inner diameter
Series 1
Series［
Steel Pipe outer diameter
Series 1
Series 1
GB/T9119-2000
PNO.6MPa (6bar) Flat surface, raised plate type flat welding steel pipe flange Table 2Www.bzxZ.net
Connection size
Bolt hole
Center circle
Sealing surface
Method inner diameter
Series 1
Series 1
Steel pipe outer diameter
Series 1
Series 1
GB/T 9119—2000
Table 3PN1.0MPa (10bar) flat and raised panel type flat-welded steel pipe flange connection dimensions
Bolt hole
Center circle
Use PN4.0MPa flange dimensions
Use PN1.6MPa flange dimensions
Sealing surface
Flange inner diameter
Series 1
Series 1
Steel pipe outer diameter
Series!
Series 1
GB/T9119-2000
Table 4PN1.6MPa(16bar) plane, raised plate type flat welded steel pipe flange connection dimensions
bolt hole
center circle
Use PN4.OMPa flange dimensions
sealing surface
flange inner diameter
Series 1
Series sub
steel pipe outer diameter
Series!
Series 1
GB/T9119-2000
Table 5PN2.5MPa(25bar) plane, raised plate type flat welded steel pipe flange connection dimensions
bolt hole
center circle
Use PN4.OMPa flange size
sealing surface
flange inner diameter
series 1
series 1
steel pipe outer diameter
series 1
series!
GB/T9119—2000
PN4.0MPa (40bar) flat surface, raised plate type flat welded steel pipe flange table 6
connection size
bolt hole
center circle
sealing surface
flange inner diameter
series 1
series 1
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