1、ANSI/MSS SP-44-2016 (2017 REISSUE) (Replaces Original 2016 Edition) Steel Pipeline Flanges Standard Practice Developed and Approved by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE Vienna, Virginia 22180-4602 Phone: (703) 281-6613 Fax: (703) 2
2、81-6671 E-mail: standardsmsshq.org www.msshq.org MSS STANDARD PRACTICE SP-44i This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 110 and the MSS Coordinating Committee. In addition, this Standard Practice was approved by an ANSI/MSS Consensus Committee and AN
3、SI as an American National Standard. The content of this Standard Practice is the resulting efforts of competent and experienced volunteers to provide an effective, clear, and non-exclusive standard that will benefit the industry as a whole. This MSS Standard Practice describes minimal requirements
4、and is intended as a basis for common practice by the manufacturer, the user, and the general public. The existence of an MSS Standard Practice does not in itself preclude the manufacture, sale, or use of products not conforming to the Standard Practice. Mandatory conformance to this Standard Practi
5、ce is established only by reference in other documents such as a code, specification, sales contract, or public law, as applicable. MSS has no power, nor does it undertake, to enforce or certify compliance with this document. Any certification or other statement of compliance with the requirements o
6、f this Standard Practice shall not be attributable to MSS and is solely the responsibility of the certifier or maker of the statement. “Unless indicated otherwise within this MSS Standard Practice, other standards documents referenced to herein are identified by the date of issue that was applicable
7、 to this Standard Practice at the date of approval of this MSS Standard Practice (see Annex E). This Standard Practice shall remain silent on the validity of those other standards of prior or subsequent dates of issue even though applicable provisions may not have changed.” By publication of this St
8、andard Practice, no position is taken with respect to the validity of any potential claim(s) or of any patent rights in connection therewith. MSS shall not be held responsible for identifying any patent rights. Users are expressly advised that determination of patent rights and the risk of infringem
9、ent of such rights are entirely their responsibility. In this Standard Practice, all text, notes, annexes, tables, figures, and references are construed to be essential to the understanding of the message of the standard, and are considered normative unless indicated as “supplemental”. All appendice
10、s, if included, that appear in this document are construed as “supplemental”. Note that supplemental information does not include mandatory requirements. The SI (metric) units and U.S. customary units in this Standard Practice are regarded separately as the standard and may not be technically equiva
11、lent; each should be used independently of the other. Combining or converting values or tolerances between the two systems may result in non-conformance with this Standard Practice. This Standard Practice has been substantially revised from the previous 2010 edition. It is suggested that if the user
12、 is interested in knowing what changes have been made, that direct page by page comparison should be made of this document and that of the previous edition. Non-toleranced dimensions in this Standard Practice are nominal unless otherwise specified. Excerpts of this Standard Practice may be quoted wi
13、th permission. Credit lines should read Extracted from ANSI/MSS SP-44-2016 with permission of the publisher, Manufacturers Standardization Society of the Valve and Fittings Industry. Reproduction and/or electronic transmission or dissemination is prohibited under copyright convention unless written
14、permission is granted by the Manufacturers Standardization Society of the Valve and Fittings Industry Inc. All rights reserved. Originally Approved/Published: July 1952 Originally ANSI Approved: December 2014 Current ANSI/MSS Edition Approved by MSS: June 2016 Current ANSI/MSS Edition Approved by AN
15、SI: November 2016 Current ANSI/MSS Edition Published: November 2016 (Reissued August 2017) MSS is a registered trademark of Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Copyright , 2016 by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc
16、. Printed in U.S.A. MSS STANDARD PRACTICE SP-44ii FOREWORD The Manufacturers Standardization Society originally developed this Standard Practice in response to the continued requests for steel pipe flanges for pipeline use, particularly in sizes larger than those covered by ANSI Standard B16.5 on St
17、eel Pipe Flanges and Flanged Fittings. The line pipe is uniquely characterized by high-strength, cold worked, thin-wall of the carbon steel grade, which necessitates special considerations for the welding end of the flanges. The size and pressure class range was originally NPS 26 through NPS 36 in p
18、ressure classes customarily designated in ANSI Standard B16.5 as 300, 400, 600, and 900 lb. The 1970 edition deleted the slip-on flanges for lack of demand, and added a 150 lb. Class and coverage for NPS 12 through NPS 24. Additional coverage was also necessitated by the advent of the use of line pi
19、pe of grades having minimum specified yield strength higher than the 52,000 psi maximum contemplated at the time of initial development, and therefore still thinner walls. In some instances, this advent widened the differential between the tensile properties of the flange steel versus that of the ma
20、ting pipe steel. This, in turn necessitated greater flexibility in the selection of hub dimensions, so that various combinations of material-strength and flange-dimensions could be utilized to supply the flanges. Section 5 on Flange Design was introduced at this point, and is one of the key features
21、 of this Standard Practice. The 1972 edition included the coverage of blind flanges in all pressure classes and clarification of text requirements for better understanding and usage under the more diverse conditions. The 1975 edition expanded the size range above NPS 36. The drilling templates for t
22、he Class 150 flanges of the NPS 38 and larger sizes continued the previous philosophy of adopting the drilling template of the Class 125 of ANSI/ASME Standard B16.1. However, the drilling templates of the Class 300 flanges of the NPS 38 and larger sizes did not continue the adoption of the Class 250
23、 of ANSI/ASME Standard B16.1 drilling templates, nor did the NPS 38 and larger sizes of Classes 400, 600, and 900 continue the extrapolation of ANSI/ASME B16.5 drilling templates; instead, these drilling templates were necessarily designed more compactly because of the increased loads. While these f
24、langes are designated by the customary ANSI Standard Class 150, 300, 400, 600, and 900, their use is almost entirely confined to cross country transmission pipelines at atmospheric temperatures. The flanges have been designed primarily for use at their cold ratings which conform to the ANSI/ASME Sta
25、ndard B16.5 ratings of 100 F, and are intended primarily for attachment to relatively thin-wall, high-strength cold worked pipe, and high-strength butt-welding fittings in pipeline service at temperatures of 450 F and lower. However, flanges forged of other materials are capable of pressure temperat
26、ure ratings as specified in Section 2.1. The 1981 edition brought the document into closer editorial alignment with ANSI/ASME B16.5. However, out of recognition of the successful experience of the pipeline industry, room temperature ratings were extended to 250 F. Users are cautioned that when these
27、 flanges are bolted to valves and used at temperatures between 100 F and 450 F, the rating of the valve may not be as high as the flange. The 1990 revision of this SP was required to update the referenced standards list and delete the SI (metric) equivalents. The 1991 revision of this SP was require
28、d to add blind flange machining guidance, flat face requirements and precautionary notes as well as updating of the referenced standards. The 1996 revision adds a table with permissible imperfections in flange facing finish and clarifies Annex A design criteria. There were several errata, or correct
29、ions made to references to other standards. Dimensional tolerances have been changed where necessary to conform to ASME B16.5 and B16.47. The 2006 revision was required to add SI (metric) equivalent units, notch toughness requirement, new bolting materials and update of reference standards list. The
30、 2010 revision recognized the existence of ASME B16.47 Series A flanges, which adopted MSS SP-44 dimensions but does not cover the SP-44 high strength materials used in the pipeline industry to match API line pipe of equivalent grades. In 2014, this Standard Practice (2010 Edition) was ANSI-approved
31、 as an American National Standard. This process involved an ANSI/MSS Consensus Committee that was composed of a diverse volunteer group of industry stakeholders with a material interest in the topic of this Standard Practice. This American National Standard edition, ANSI-approved and published in 20
32、15, is substantively consistent with the 2010 MSS-only edition and will utilize this 2010 year in its nomenclature. In 2016, this Standard Practice was substantially revised and reformatted to include: Defined chemistry limits (added a Table 1 and also removed external references), clarified the “lo
33、t” definition, made impact testing at -50 F mandatory for grades over F42, added requirement for hardness testing, clarified allowable heat treatment methods, changed marking requirements, added tolerances for raised face height and bolt hole diameter, added requirements for Manufacturing Procedure
34、Specification and Inspection and Test Plans, added Figure 4 to illustrate test locations and orientation, removed ring gasket dimensions and referenced ASME B16.20, added Supplementary Requirements SR1 through SR16, updated and renumbered the reference annex, among other substantive and editorial re
35、visions. Moreover, the 2016 edition was ANSI-approved as a Revised American National Standard. Note that the original 2016 edition was replaced by the 2017 Reissue of the 2016 Edition to correct publication processing related errata. 127 Park Street, NE Vienna, VA 22180-4602 703-281-6613 Fax 703-281
36、-6671 www.msshq.org E-mail: infomsshq.org EXECUTIVE DIRECTOR: D. E. Thompson January 23, 2018 ERRATA SHEET 2 FOR MSS SP-44, Steel Pipeline Flanges (2016, 2010, and 2006 Editions) This “normative” errata correction applies to MSS SP-44, Steel Pipeline Flanges; specifically, the current 2016 (2017 Rei
37、ssue) edition and previous editions that include 2006 and 2010. NOTE THE FOLLOWING CORRECTION: Current 2016 (2017 Reissue) ANSI/MSS Edition Page 3, Section 3.1.5 (involving impact testing/notch toughness). Replace the existing word “sheet” with “lot” in the sixth sentence (first paragraph). For exam
38、ple, correct the current text “From each sheet of steel, one set (three specimens) shall be tested at ” with the following: “From each lot of steel, one set (three specimens) shall be tested at .” * Note this errata correction includes the original, replaced 2016 edition.Previous 2010 and 2006 Editi
39、ons Page 2, Section 3.1.5 (involving impact testing/notch toughness). Replace the existing word “sheet” with “lot” in the fifth sentence (first paragraph). For example, correct the current text “From each sheet of steel, one set (three specimens) shall be tested at ” with the following: “From each l
40、ot of steel, one set (three specimens) shall be tested at .” This Errata Sheet (number two) is intended for those who obtained the Standard Practice before the January 23, 2018 errata publication date indicated above or otherwise do not already have this information. Please include this Errata Sheet
41、 within your existing 2016 edition (or previous 2006 and 2010 editions) of the Standard Practice. Future editions of this Standard Practice will include this corrected information. PRESIDENT: M. A. Clark NIBCO, Inc. VICE PRESIDENTS: F. J. Washburn Rotork Controls, Inc. J. Barker DeZURIK APCO Hilton,
42、 Inc. TREASURER: G. M. Johnson United Valve Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. “The Technical Voice of the Industry for Over 94 Years”iii MSS STANDARD PRACTICE SP-44iv TABLE OF CONTENTS SECTION PAGE 1 SCOPE 1 2 DENOTATION 1 3 MATERIALS . 2 4 HEAT TREATMENT
43、 6 5 FLANGE DESIGN . 7 6 MARKING . 8 7 FACINGS . 8 8 CODE LIMITATIONS 9 9 FLANGE BOLTING DIMENSIONS 9 10 TOLERANCES 9 11 MANUFACTURING AND INSPECTION . 11 TABLE 1 Chemistry Limits (Percentage) 4 2 Tensile Requirements SI (Metric) and U.S. Customary . 4 3 List of Bolting Specifications . 5 4 Pressure
44、-Temperature Ratings, Maximum Allowable Working Pressures SI (Metric) and U.S. Customary . 6 5 Sheet Gasket Dimensions SI (Metric) . 15 6 Class 150, 19.6 bar at Atmospheric Temperature Raised Face SI (Metric) 17 7 Class 300, 51.0 bar at Atmospheric Temperature Raised Face and Ring-Type Joints SI (Me
45、tric) . 19 8 Class 400, 68.3 bar at Atmospheric Temperature Raised Face and Ring-Type Joints SI (Metric) 21 9 Class 600, 102.1 bar at Atmospheric Temperature Raised Face and Ring-Type Joints SI (Metric) 23 10 Class 900, 153.1 bar at Atmospheric Temperature Raised Face and Ring-Type Joints SI (Metric
46、) 25 11 Permissible Imperfections in Flange Facing Finish SI (Metric) and U.S. Customary . 26 FIGURE 1 Acceptable Design for Unequal Wall Thickness . 12 2 Bevel Detail for Wall Thickness (T), 22mm (0.88 in.) or Less . 13 3 Bevel Detail for Wall Thickness (T), Greater than 22mm (0.88 in.) . 13 4 Reco
47、mmended Test Location and Orientation . 14 5 Reference Drawing for Table 6 16 6 Reference Drawing for Table 7 18 7 Reference Drawing for Table 8 20 8 Reference Drawing for Table 9 22 9 Reference Drawing for Table 10 24 ANNEX A Design Criteria 28 B Blind Flange Design Criteria 29 C Dimensional Data T
48、ables and Drawings for Gaskets and Classes 150, 300, 400, 600, and 900 Flanges in U.S. Customary Units . 30 Table C1 Sheet Gasket Dimensions . 31 Figure C1 Reference Drawing for Table C2 32 Table C2 Class 150, 285 psi at Atmospheric Temperature Raised Faces . 33 Figure C2 Reference Drawing for Table
49、 C3 34 Table C3 Class 300, 740 psi at Atmospheric Temperature Raised Face and Ring Joints . 35 Figure C3 Reference Drawing for Table C4 36 Table C4 Class 400, 990 psi at Atmospheric Temperature Raised Face and Ring Joints . 37 Figure C4 Reference Drawing for Table C5 38 Table C5 Class 600, 1480 psi at Atmospheric Temperature Raised Face and Ring Joints . 39 Figure C5 Reference Drawing for Table C6 40 Table C6 Class 9
