This standard specifies the types and sizes of flat and raised face welding steel pipe flanges with nominal pressure PN of 0.25, 0.6, 1.0, 1.6, 2.5, 4.0, 6.3, 10.0, 16.0 MPa and nominal pressure PN of 2.0, 5.0, 11.0, 15.0, 26.0, 42.0 MPa. This standard is applicable to flat and raised face welding steel pipe flanges with nominal pressure PN0.25 to PN42.0 MPa. GB/T 9115.1-2000 Flat and raised face welding steel pipe flanges GB/T9115.1-2000 Standard download decompression password: www.bzxz.net

1 Scope
National Standard of the People's Republic of China
Flat face and raised face welding steel pipe flanges
Steel pipe welding neck flangeswith flat face or raised faceGB/T 9115.1—2000
Replaces GB/T9115.1~9115.161988
This standard specifies the types and sizes of flat face and raised face welding steel pipe flanges with nominal pressure PN of 0.25, 0.6, 1.0, 1.6, 2.5, 4.0, 6.3, 10.0, 16.0MPa and nominal pressure PN of 2.0, 5.0, 11.0, 15.0, 26.0, 42.0MPa. This standard applies to flat face and raised face welding steel pipe flanges with nominal pressure PNO.25~PN42.0MPa. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are 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 PN0.6, PN1.0, PN1.6, PN2.5 and PN4.0MPa flat butt welding steel pipe flanges shall comply with the provisions of Figure 1, and the dimensions shall comply with the provisions of Tables 1 to 6.
3.2The types of PN0.25, PN0.6, PN1.0, PN1.6, PN2.5, PN4.0, PN6.3, PN10.0 and PN16.0MPa raised face welding steel pipe flanges shall comply with the provisions of Figure 2, and the dimensions shall comply with the provisions of Tables 1 to 9. 3.3The types of PN2.0MPa flat face welding steel pipe flanges shall comply with the provisions of Figure 3, and the dimensions shall comply with the provisions of Table 10. 3.4The types of PN2.0 and PN5.0MPa raised face welding steel pipe flanges shall comply with the provisions of Figure 4, and the dimensions shall comply with the provisions of Table 10 and Table 1!.
3.5The types of PN11.0, PN15.0, PN26.0 and PN42.0MPa raised face welding steel pipe flanges shall comply with the provisions of Figure 5, and the dimensions shall comply with the provisions of Tables 12 to 15.
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 flanges at different temperatures shall comply with the provisions of Appendix A (Standard Appendix) of GB/T9124-2000. www.bzxz.net
4.3 The welding joint type and slope size of flanges shall comply with the provisions of Appendix B (Suggestive Appendix) of GB/T9124-2000. 5 Marking
5.1 Flanges 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 standard number. 5.2 The type code of the flange sealing surface shall comply with the provisions of GB/T9112. Approved by the State Administration of Quality and Technical Supervision on September 28, 2000 and implemented on July 1, 2001
5.3 Marking examples
5.3.1 Marking examples for flat butt-welded steel pipe flanges GB/T9115.1—2000
Flat butt-welded steel pipe flanges with a nominal diameter of 100 mm and a nominal pressure of 2.5 MPa (25 bar) (for use with metric pipes): flange DN100-PN25FF (series) GB/T 9115.1—2000 Flat butt-welded steel pipe flanges with a nominal diameter of 100 mm and a nominal pressure of 2.5 MPa (25 har) (for use with imperial pipes): flange DN100-PN25FFGB/T 9115.1—20005.3.2 Marking examples of raised face welding steel pipe flanges Raised face welding steel pipe flanges with a nominal diameter of 80 mm and a nominal pressure of 2.5 MPa (25 bar) (equipped with metric pipes): flange DN80PX25RF (Series I) GB/T9115.1--2000 Raised face welding steel pipe flanges with a nominal diameter of 100 mm and a nominal pressure of 5.0 MPa (50 bar) (equipped with imperial pipes): flange DN100PN50RF
GB/T9115.1—2000
Flat face (FF) butt welding steel pipe cover
(Applicable to PN0.6, PN1.0, PN1.6, PN2.5 and PN4.0MPa) Figure 2 Raised face (RF) butt welding steel pipe flange
(Applicable to PNNO. 25, PNO.6, PN1.0, PN1.6, PN2.5, PN4.0, PN6.3, PN10.0 and PN16.0 (MPa)tit;
GB/T 9115..---2000
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Guozizhong
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GB/T 9115. 1
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In Figure 7
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GB/T9115.1—2000
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User specification
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Wei Xundi
GB/T 9115.1—2000
GB/T9115.1—2000
GB/T 9115. 1—2000
Figure
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