1 Application Scope
This standard is applicable to the flanges and blank flanges for the steel pipelines in the piping engineering of petrochemical enterprises.
2 Normative References
GB 711 Hot-rolled Quality Carbon Structural Steel Plates and Wide Strips
GB 3274 Hot-rolled plates and strips of carbon structural steels and high strength low alloy structural steels
GB 3531 Low alloy steel plates for low temperature pressure vessels
GB 4237 Hot Rolled Stainless Steel Sheets and Plates
GB 7306 Pipe Threads Sealed by Thread
JB 4726 Carbon and low - alloy steel forgings for pressure vessels
JB 4727 Low - alloy steel forgings for low temperature pressure vessels
JB 4728 Stainless Steel Forgings for Pressure Vessels
SH 3405 Series of steel pipe size for petrochemical enterprise
Contents
1 Application Scope
2 Normative References
3 General Requirements
4 Flange Structure and Dimension
5 Flange Pressure - Temperature Parameter
6 Technical Specification
7 Marking and Packaging
Appendix A Calculation Method for the Length of Fastening Pieces
Additional Explanation:
