Large Diameter Steel Flanges

NPS 26 Through NPS 60 Metric/Inch Standard

AN A MERICAN NA TIONAL S T AND ARD

ASME B16.47-2011

(Revision of ASME B16.47-2006)

ASME B16.47-2011

(Revision of ASME B16.47-2006)

Large Diameter Steel Flanges

NPS 26 Through NPS 60 Metric/Inch Standard

AN AMERICAN NA TIONAL S T AND ARD

Three Park Avenue • New York, NY • 10016 USA

Date of Issuance: October 20, 2011

The next edition of this Standard is scheduled for publication in 2016.

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Copyright © 2011 by

THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS

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CONTENTS

Foreword v

Committee Roster vi

Correspondence With the B16 Committee vii

Summary of Changes viii

1. Scope 1

2. Pressure–Temperature Ratings 2

3. Component Size: Nominal Pipe Size 3

4. Marking 3

5. Materials 3

6. Dimensions 5

7. Tolerances 6

8. Pressure Testing 6

Figures

1. Welding Ends (Welding Neck Flanges, No Backing Rings) 7

2. Welding Ends (Welding Neck Flanges With Backing Rings) 8

3. Welding Ends (Welding Neck Flanges) 9

Tables

1. List of Material Specifications 10

2. List of Bolting Specifications (Applicable ASTM Specifications) 12

iii

1. Dimensions of Ring-Joint Facings 39

2. Permissible Imperfections in Flange Facing Finish 39

3. Dimensions of Class 150 Series A Flanges 40

4. Dimensions of Class 300 Series A Flanges 41

5. Dimensions of Class 400 Series A Flanges 42

6. Dimensions of Class 600 Series A Flanges 43

7. Dimensions of Class 900 Series A Flanges 44

8. Dimensions of Class 75 Series B Flanges 45

9. Dimensions of Class 150 Series B Flanges 46

10. Dimensions of Class 300 Series B Flanges 47

11. Dimensions of Class 400 Series B Flanges 48

12. Dimensions of Class 600 Series B Flanges 49

13. Dimensions of Class 900 Series B Flanges 50

14. Flange Bolting Dimensional Recommendations 51

    Mandatory Appendices

    
    

    I	Pressure–Temperature Ratings and Dimensional Data for Classes 75, 150, 300,
    	400, 600, and 900 Flanges in U.S. Customary Units ...............................	53
    II	Quality System Program ..........................................................	95
    III	References ........................................................................	96

    Nonmandatory Appendices

    1. Methods Used for Establishing Pressure–Temperature Ratings 98

    2. Gaskets (Other Than Ring-Joint) 102

iv