This standard specifies the types and dimensions of raised face welded ring plate loose sleeve steel pipe flanges with nominal pressure PN of 1.0, 1.6, 2.5 and 4.0 MPa. This standard applies to raised face welded ring plate loose sleeve steel pipe flanges with nominal pressure PN1.0~PN4.0 MPa. GB/T 9120.1-2000 Raised face welded ring plate loose sleeve steel pipe flange GB/T9120.1-2000 Standard download decompression password: www.bzxz.net

1 Scope
National Standard of the People's Republic of China
Loose plate steel pipe flanges with welding neck collarwith raised face
GB/T 9120. 1-2000
Replaces GB/T9120.1~9120.2—1988
This standard specifies the types and dimensions of raised face welded neck plate loose sleeve steel pipe flanges with nominal pressure PN of 1.0, 1.6, 2.5 and 4.0MPa.
This standard is applicable to raised face welded neck plate loose sleeve steel pipe flanges with nominal pressure PN1.0～PN4.0MPa. 2 Referenced 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 Www.bzxZ.net
PN1.0, PN1.6, PN2.5 and PN4.0MPa The types of raised face welded ring plate loose sleeve steel pipe flanges shall comply with the provisions of Figure 1, and the sizes shall comply with the provisions of Tables 1 to 4.
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.
4.3 The welding joint type and groove size of flanges shall comply with the provisions of Appendix B (Suggestive Appendix) of GB/T9124~2000. 5 Marking
5.1 Flanges should be marked according to nominal diameter, nominal pressure, sealing surface type code, matching steel pipe series code (the matching metric pipe code is "Series II", and the matching British pipe is not marked) and standard number. 5.2 The type code of the flange sealing surface should comply with the provisions of GB/T9112. 5.3 Marking example
Raised face welded ring plate loose sleeve steel pipe flange with a nominal diameter of 80mm and a nominal pressure of 4.0MPa (40bar) (matched with metric pipe): flange DN80-PN40RF (Series I) GB/T9120.1-2000 Raised face welded ring plate loose sleeve steel pipe flange with a nominal diameter of 80mm and a nominal pressure of 2.5MPa (25bar) (matched with British pipe): flange DN80-PN25RF GB/T9120.1-2000 Approved by the State Administration of Quality and Technical Supervision on September 28, 2000 206
Implemented on July 1, 2001
GB/T9120.1—2000
Figure 1 Raised face (RF) butt welding ring plate loose sleeve steel pipe flange (applicable to PN1.0, PN1.6, PN2.5 and PN4.0MPa) 207
GB/T9120.1—2000
GB/T 9120. 1—2000
GB/T9120.1-2000
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