This standard specifies steel pipe flanges and blind flanges' materials, pressure-temperature ratings, dimensions, tolerances, joint seal surface, bolts, gaskets, types and dimensions of welding ends, processing, manufacturing, testing, inspection and acceptance, supply requirements and reference masses.
This standard is applicable to steel pipe flanges and blind flanges specified in GB/T 9112 ~ GB/T 9123.
Foreword I 1 Scope 1 2 Normative References 1 3 Material 2 4 Pressure-temperature Rating 8 5 Dimension and Tolerance 9 5.1 Dimension 9 5.2 Dimensional Tolerance 36 6 Joint Facing 44 7 Fastener and Gasket 45 7.1 Fastener 45 7.2 Gasket 45 8 Type and Dimension of the Welding End 45 9 Processing and Manufacturing 46 10 Test 48 11 Inspection and Acceptance 48 11.1 Inspection 48 11.2 Acceptance 48 12 Mark 48 13 Supply Requirements 49 Appendix A (Normative) Type and Dimension of the Welding End 50 A.1 Type and Dimension of Butt Welding End Connection 50 A.2 Plate flange for flat flanging (PL) and Welding-On Collar Loose Plate Flange (PL/C) 63 A.3 Hubbed slip-on flange (SO) 63 A.4 Socket Welding Flange (SWF) 64 Appendix B (Normative) Pressure-Temperature Limit Rated Value of the Flange Marked with Class 65 Appendix C (Informative) Referrence Mass 67 C.1 Referrence Masses of the Flange Marked with PN 67 C.2 Referrence Masses of the Flange Marked with Class 79 Appendix D (Informative) Datas of Order Contract 86 Appendix E (Informative) Pipe's Schedule Number and Steel Pipe’s Wall Thickness 87 Appendix F (Informative) Referrence Dimensions of the Flange (the Part outside of this Standard's Scope) Marked with PN 89 Appendix G (Informative) Material Selection for the Steel Pipe and P/T Rated Value of the Steel Pipe According to U.S. ASME B 16.5 90 G.1 Referrence Standards 90 G.2 Material Selection for Steel Pipe Flanges According to U.S. ASME B 16.5 92 G.3 Pressure-Temperature Ratings for Steel Pipe Flanges in the U.S. ASME B 16. 5 Standard 97
