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ASME B16.47-2020
M00052279
New product
ASME B16.47-2020 Large Diameter Steel Flanges: NPS 26 through NPS 60, Metric/Inch Standard
standard by ASME International, 01/29/2021
Full Description
This standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for pipe flanges in sizes NPS 26 through NPS 60. Included are flanges with rating class designations 75, 150, 300, 400, 600, and 900 with requirements given in both SI (Metric) and U. S. Customary units, with diameter of bolts and flange bolt hole expressed in inch units. This standard is limited to flanges made from cast or forged materials and blind flanges made from cast, forged, or plate materials.In stock
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Large Diameter Steel Flanges
NPS 26 Through NPS 60 Metric/Inch Standard
AN A MERICAN NA TIONAL S T AND ARD
ASME B16.47-2020
(Revision of ASME B16.47-2017)
ASME B16.47-2020
(Revision of ASME B16.47-2017)
Large Diameter
Steel Flanges
NPS 26 Through NPS 60 Metric/Inch Standard
AN AMERICAN NATIONAL STANDARD
Date of Issuance: January 29, 2021
The next edition of this Standard is scheduled for publication in 2024.
ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard. Periodically certain actions of the ASME B16 Committee may be published as Cases. Cases and interpretations are published on the ASME website under the Committee Pages at https://cstools.asme.org/ as they are issued.
Errata to codes and standards may be posted on the ASME website under the Committee Pages to provide corrections to incorrectly published items, or to correct typographical or grammatical errors in codes and standards. Such errata shall be used on the date posted.
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This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large.
ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.
ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent, nor assume any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility.
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ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals.
No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise,
without the prior written permission of the publisher.
The American Society of Mechanical Engineers Two Park Avenue, New York, NY 10016-5990
Copyright © 2021 by
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
All rights reserved Printed in U.S.A.
CONTENTS
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Committee Roster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Correspondence With the B16 Committee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Summary of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
List of Changes in Record Number Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Pressure–Temperature Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3 Component Size: Nominal Pipe Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7 Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
8 Pressure Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mandatory Appendix
I References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Nonmandatory Appendices
A | Methods Used for Establishing Pressure–Temperature Ratings . . . . . . . . . . . . . . . . . . . . . . . | 115 |
B | Gaskets (Other Than Ring-Joint) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 119 |
C | Quality System Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 121 |
D | Method for Calculating Bolt Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 122 |
Figures 1 | Welding Ends (Welding Neck Flanges, No Backing Rings) . . . . . . . . . . . . . . . . . . . . . . . . . . . | 8 |
2 | Welding Ends (Welding Neck Flanges With Backing Rings) . . . . . . . . . . . . . . . . . . . . . . . . . | 9 |
3 | Welding Ends (Welding Neck Flanges) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 10 |
D-1 | Specified Stud Bolt Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 123 |
Tables | ||
1 | List of Material Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 11 |
2 | List of Bolting Specifications (Applicable ASTM Specifications) . . . . . . . . . . . . . . . . . . . . . . . | 13 |
3 | Pressure–Temperature Ratings for Group 1.1 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 14 |
3C | Pressure–Temperature Ratings for Group 1.1 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 15 |
4 | Pressure–Temperature Ratings for Group 1.2 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 16 |
4C | Pressure–Temperature Ratings for Group 1.2 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 17 |
5 | Pressure–Temperature Ratings for Group 1.3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 18 |
5C | Pressure–Temperature Ratings for Group 1.3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 19 |
6 | Pressure–Temperature Ratings for Group 1.4 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 20 |
6C | Pressure–Temperature Ratings for Group 1.4 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 21 |
7 | Pressure–Temperature Ratings for Group 1.5 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 22 |
7C | Pressure–Temperature Ratings for Group 1.5 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 23 |
8 | Pressure–Temperature Ratings for Group 1.7 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 24 |
8C | Pressure–Temperature Ratings for Group 1.7 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 25 |
9 | Pressure–Temperature Ratings for Group 1.9 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 26 |
9C | Pressure–Temperature Ratings for Group 1.9 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 27 |
10 | Pressure–Temperature Ratings for Group 1.10 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 28 |
10C | Pressure–Temperature Ratings for Group 1.10 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 29 |
11 | Pressure–Temperature Ratings for Group 1.11 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 30 |
11C | Pressure–Temperature Ratings for Group 1.11 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 31 |
12 | Pressure–Temperature Ratings for Group 1.13 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 32 |
12C | Pressure–Temperature Ratings for Group 1.13 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 33 |
13 | Pressure–Temperature Ratings for Group 1.14 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 34 |
13C | Pressure–Temperature Ratings for Group 1.14 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 35 |
14 | Pressure–Temperature Ratings for Group 1.15 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 36 |
14C | Pressure–Temperature Ratings for Group 1.15 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 37 |
15 | Pressure–Temperature Ratings for Group 1.17 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 38 |
15C | Pressure–Temperature Ratings for Group 1.17 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 39 |
16 | Pressure–Temperature Ratings for Group 1.18 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 40 |
16C | Pressure–Temperature Ratings for Group 1.18 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 41 |
17 | Pressure–Temperature Ratings for Group 2.1 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 42 |
17C | Pressure–Temperature Ratings for Group 2.1 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 43 |
18 | Pressure–Temperature Ratings for Group 2.2 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 44 |
18C | Pressure–Temperature Ratings for Group 2.2 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 45 |
19 | Pressure–Temperature Ratings for Group 2.3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 46 |
19C | Pressure–Temperature Ratings for Group 2.3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 47 |
20 | Pressure–Temperature Ratings for Group 2.4 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 48 |
20C | Pressure–Temperature Ratings for Group 2.4 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 49 |
21 | Pressure–Temperature Ratings for Group 2.5 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 50 |
21C | Pressure–Temperature Ratings for Group 2.5 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 51 |
22 | Pressure–Temperature Ratings for Group 2.6 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 52 |
22C | Pressure–Temperature Ratings for Group 2.6 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 53 |
23 | Pressure–Temperature Ratings for Group 2.7 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 54 |
23C | Pressure–Temperature Ratings for Group 2.7 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 55 |
24 | Pressure–Temperature Ratings for Group 2.8 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 56 |
24C | Pressure–Temperature Ratings for Group 2.8 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 57 |
25 | Pressure–Temperature Ratings for Group 2.9 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 58 |
25C | Pressure–Temperature Ratings for Group 2.9 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 59 |
26 | Pressure–Temperature Ratings for Group 2.10 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 60 |
26C | Pressure–Temperature Ratings for Group 2.10 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 61 |
27 | Pressure–Temperature Ratings for Group 2.11 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 62 |
27C | Pressure–Temperature Ratings for Group 2.11 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 63 |
28 | Pressure–Temperature Ratings for Group 2.12 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 64 |
28C | Pressure–Temperature Ratings for Group 2.12 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . | 65 |
29 | Dimensions of Ring-Joint Facings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 66 |
29C | Dimensions of Ring-Joint Facings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 67 |
30 | Permissible Imperfections in Flange Facing Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 68 |
30C | Permissible Imperfections in Flange Facing Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 68 |
31 | Dimensions of Class 150 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 69 |
31C | Dimensions of Class 150 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 71 |
32 | Dimensions of Class 300 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 73 |
32C | Dimensions of Class 300 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 75 |
33 | Dimensions of Class 400 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 77 |
33C | Dimensions of Class 400 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 79 |
34 | Dimensions of Class 600 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 81 |
34C | Dimensions of Class 600 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 83 |
35 | Dimensions of Class 900 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 85 |
35C | Dimensions of Class 900 Series A Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 87 |
36 | Dimensions of Class 75 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 89 |
36C | Dimensions of Class 75 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 91 |
37 | Dimensions of Class 150 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 93 |
37C | Dimensions of Class 150 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 95 |
38 | Dimensions of Class 300 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 97 |
38C | Dimensions of Class 300 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 99 |
39 | Dimensions of Class 400 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 101 |
39C | Dimensions of Class 400 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 103 |
40 | Dimensions of Class 600 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 105 |
40C | Dimensions of Class 600 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 107 |
41 | Dimensions of Class 900 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 109 |
41C | Dimensions of Class 900 Series B Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 111 |
42 | Flange Bolting Dimensional Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 112 |
A-1 | Rating Ceiling Values in bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 117 |
A-2 | Rating Ceiling Values in psig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 118 |
B-1 | Gasket Groups and Typical Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 120 |
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