HG/T 20623-2009 Steel Pipe Flanges (Class Designated) (Text of Document is in English) - Beijing translation compay

1. Scope
2. Normative References
3. Flange Types and Sealing Face
4. Materials
5. Max. Permissible Working Pressure
6. Flange straight edges thickness
7. Dimension
8. Flange Joints
9. Welded Joint and Groove Dimension
10. Dimensional Tolerance
11. Test
12. Inspection and Acceptance
13. Designation and Example of Designation
14. Packaging and Steel Seal Signs
Annex A
Annex B