1、 MSS SP-9-2013Spot Facing for Bronze, Iron, and Steel 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) 281-6671 E-mail: standardsmss-
2、hq.org www.mss-hq.org MSS MSS STANDARD PRACTICE SP-9 i This MSS Standard Practice was developed under the consensus of the MSS Technical Committees 102, 110, 201, and the MSS Coordinating Committee. The content of this Standard Practice is the resulting efforts of competent and experienced volunteer
3、s to provide an effective, clear, and non-exclusive standard that will benefit the industry as a whole. This MSS Standard Practice describes minimal requirements and is intended as a basis for common practice by the manufacturer, the user, and the general public. The existence of an MSS Standard Pra
4、ctice does not in itself preclude the manufacture, sale, or use of products not conforming to the Standard Practice. Mandatory conformance to this Standard Practice is established only by reference in other documents such as a code, specification, sales contract, or public law, as applicable. MSS ha
5、s no power, nor does it undertake, to enforce or certify compliance with this document. Any certification or other statement of compliance with the requirements of this Standard Practice shall not be attributable to MSS and is solely the responsibility of the certifier or maker of the statement. “Un
6、less indicated otherwise within this MSS Standard Practice, other standards documents referenced to herein are identified by the date of issue that was applicable to this Standard Practice at the date of approval of this MSS Standard Practice (see Annex A). This Standard Practice shall remain silent
7、 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 Standard Practice, no position is taken with respect to the validity of any potential claim(s) or of any patent rights in connection therewi
8、th. MSS shall not be held responsible for identifying any patent rights. Users are expressly advised that determination of patent rights and the risk of infringement of such rights are entirely their responsibility. In this Standard Practice, all text, notes, annexes, tables, figures, and references
9、 are construed to be essential to the understanding of the message of the standard, and are considered normative unless indicated as “supplemental”. All appendices, if included, that appear in this document are construed as “supplemental”. Note that supplemental information does not include mandator
10、y requirements. Substantive changes in this 2013 edition are “flagged” by parallel bars as shown on the margins of this paragraph. The specific detail of the change may be determined by comparing the material flagged with that in the previous edition. The (SI) metric units and U.S. customary units i
11、n this Standard Practice are regarded separately as the standard; each should be used independently of the other. Combining or converting values between the two systems may result in non-conformance with this Standard Practice. Non-toleranced dimensions in this Standard Practice are nominal unless o
12、therwise specified. Excerpts of this Standard Practice may be quoted with permission. Credit lines should read Extracted from MSS SP-9-2013 with permission of the publisher, Manufacturers Standardization Society of the Valve and Fittings Industry. Reproduction and/or electronic transmission or disse
13、mination is prohibited under copyright convention unless written permission is granted by the Manufacturers Standardization Society of the Valve and Fittings Industry Inc. All rights reserved. Originally Approved: July 1929 Originally Published: August 1929 Current Edition Approved: October 2012 Cur
14、rent Edition Published: March 2013 MSS is a registered trademark of the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Copyright , 2013 by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-9 ii Th
15、is Page Intentionally Left Blank Manufacturers Standardization Society of the Valve and Fittings Industry MSS STANDARD PRACTICE SP-9 iii TABLE OF CONTENTS SECTION PAGE1 SCOPE 1 2 DESIGN 1 TABLE 1 Spot Face Diameters U.S. Customary (Inch-Series) 3 2 Spot Face Diameters (SI) Metric Bolting . 4 FIGURE
16、1 Flange with Spot Facing . 1 ANNEX A Referenced Standards and Applicable Dates 5 MSS STANDARD PRACTICE SP-9 1 SPOT FACING FOR BRONZE, IRON, AND STEEL FLANGES 1. SCOPE 1.1 This MSS Standard Practice applies to the spot facing for U.S. customary (inch-series) bolting of pipe flanges in bronze, gray i
17、ron, ductile iron, or steel when cast integral with valves and fittings, as well as the companion flanges, when so required by the standard for the product. 1.2 This Standard Practice also applies to the spot facing for (SI) metric bolting used in bolted joints not covered by the referenced flange s
18、tandards herein. 2. DESIGN 2.1 U.S. Customary (Inch-Series) Bolting 2.1.1 The dimensions for spot facing apply to the use of hexagon head bolts or hexagon nuts in accordance with ASME B18.2.1 and ASME B18.2.2 (heavy series). For bolt sizes 1/2 and 5/8, the minimum diameter of spot facing is sufficie
19、nt for regular square head bolts, in accordance with ASME B18.2.1. 2.1.2 The minimum spot facing diameters illustrated in Figure 1, are listed in Table 1 for bolt sizes 1/2 inch through 312inches. 2.1.3 The bolt sizes, for which spot facing is provided, include all the inch-series bolt sizes require
20、d in the various flange standards indicated below: Bronze ASME B16.24, Cast Copper Alloy Pipe Flanges and Flanged Fittings: Class 150, 300, 600, 900, 1500, and 2500 MSS SP-106, Cast Copper Alloy Flanges and Flanged Fittings: Class 125, 150, and 300 Gray Iron ASME B16.1, Gray Iron Pipe Flanges and Fl
21、anged Fittings: Class 25, 125, and 250 Ductile Iron ASME B16.42, Ductile Iron Pipe Flanges and Flanged Fittings: Class 150 and 300 Steel ASME B16.5, Pipe Flanges and Flanged Fittings: NPS 1/2 through 24 Metric/Inch Standard ASME B16.47 Large Diameter Steel Flanges: NPS 26 through NPS 60 Metric/Inch
22、Standard MSS SP-44 Steel Pipeline Flanges FIGURE 1 Flange with Spot Facing MSS STANDARD PRACTICE SP-9 2 2.2 (SI) Metric Bolting 2.2.1 The dimensions for spot facing apply to the use of (SI) metric hexagon (hex) head bolts or hexagon nuts in accordance with heavy series ASME B18.2.3.6M and ASME B18.2
23、.4.6M(1). For bolt sizes M12, M14, and M16, the minimum diameter of spot facing is sufficient for regular square head bolts in accordance with ASME B18.2.3.10M. 2.2.2 The minimum spot facing diameters, illustrated in Figure 1, are listed in Table 2 for bolt sizes M12 through M100. 2.3 Other Design D
24、etails 2.3.1 When cutting into the hub of companion flanges or the body of flanged fittings and valves with spot facing tools is necessary, the resulting wall thickness shall not be less than the minimum required thickness specified in the appropriate referenced standard in Section 2.1.3 or the spec
25、ification requiring (SI) metric bolting. 2.3.2 Eccentricity of the spot face diameter with the bolt hole must be limited to provide sufficient facing for the bolt head and nut used in the joint assembly. 2.3.3 The depth of the spot face is not given in this Standard Practice, as the requirement is c
26、overed in the various referenced flange fitting standards in Section 2.1.3 or within the applicable specification(s) requiring (SI) metric bolting. 2.3.4 Back facing may be used as an alternate to spot facing at the manufacturers option. When used, back facing shall provide a surface that will ensur
27、e full bearing of the bolting nut. The minimum diameter of the back face shall be no less than the bolt circle diameter less one spot face diameter, as listed in Table 1 for U.S. customary bolts or Table 2 for (SI) metric bolts. When cutting into the hub of flanges, flange fittings, or flanged valve
28、 bodies with back facing tools, the intersection shall have a radius of not less than 1/16 inch (1.5 mm). The resulting wall thickness for fittings and valve bodies shall not be less than the minimum required thickness specified within the appropriate standard in Section 2.1.3 or the specification r
29、equiring (SI) metric bolting. 2.3.5 The bearing surfaces of spot faces or back facing shall be parallel to the flange face within the requirement of the appropriate referenced standard in Section 2.1.3 or the specification requiring (SI) metric bolting. NOTE: (1) As applicable, ASME B18.2.6M (replac
30、ed ASME B18.2.4.6M) and ISO 4775, for heavy hex, are also acceptable. MSS STANDARD PRACTICE SP-9 3 TABLE 1 Spot Face Diameters U.S. Customary (Inch-Series) Bolting Bolt Size (inches) Spot Face Diameter (Minimum) inches mm 1/2 1.12 28.4 5/8 1.37 34.8 3/4 1.56 39.6 7/8 1.78 45.2 1 2.03 51.6 1182.21 56
31、.1 1142.43 61.7 1382.65 67.3 1122.87 72.9 1583.12 79.2 1343.31 84.1 1783.50 88.9 2 3.75 95.3 2144.18 106.2 2124.62 117.3 2345.06 128.5 3 5.50 139.7 3126.37 161.8 NOTE: U.S. customary units (i.e., inches) in this table are the standard; (SI) metric units (i.e., millimeters) are for reference. MSS STA
32、NDARD PRACTICE SP-9 4 TABLE 2 Spot Face Diameters (SI) Metric Bolting Bolt Size (mm) Spot Face Diameter (Minimum) mm inches M12 27.8 1.09 M14 31.2 1.23 M16 34.7 1.37 M20 42.8 1.68 M22 45.1 1.78 M24 50.8 2.00 M27 56.6 2.23 M30 61.2 2.41 M33 67.0 2.64 M36 72.8 2.87 M39 78.6 3.09 M42 84.3 3.32 M45 90.1
33、 3.55 M48 95.9 3.78 M52 101.7 4.00 M56 108.0 4.25 M60 113.2 4.46 M64 119.0 4.68 M68 124.8 4.91 M72 130.5 5.14 M76 138.0 5.43 M80 143.0 5.63 M85 148.0 5.83 M90 163.0 6.42 M95 168.0 6.61 M100 178.0 7.00 NOTE: (SI) metric units (i.e., millimeters) in this table are the standard; U.S. customary units (i
34、.e., inches) are for reference. MSS STANDARD PRACTICE SP-9 5 ANNEX A Referenced Standards and Applicable Dates This annex is an integral part of this Standard Practice and is placed after the main text for convenience. Standard Name Description ASME; ANSI/ASME B16.1-2010 Gray Iron Pipe Flanges and F
35、langed Fittings: Classes 25, 125, and 250 B16.5-2009 Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard B16.24-2011 Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 600, 900, 1500, and 2500 B16.42-2011 Ductile Iron Pipe Flanges and Flanged Fittings:
36、Classes 150 and 300 B16.47-2011 Large Diameter Steel Flanges: NPS 26 through NPS 60 Metric/Inch Standard B18.2.1-2010 Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series) B18.2.2-2010 Nuts for General Applications: Machine Screw Nuts,
37、Hex, Square, Hex Flange, and Coupling Nuts (Inch Series) B18.2.3.6M-1979 (R2006) Metric Heavy Hex Bolts B18.2.3.10M-1996 (R2003) Square Head Bolts (Metric Series) B18.2.4.6M-2010 Metric Heavy Hex Nuts B18.2.6M-2012 Metric Fasteners for Use in Structural Applications MSS SP-44-2010 Steel Pipeline Fla
38、nges; including Errata Sheet (2011) SP-106-2012 Cast Copper Alloy Flanges and Flanged Fittings: Class 125, 150, and 300 ISO 4775:1984 Hexagon Nuts for High-Strength Structural Bolting with Large Width Across Flats Product Grade B Property Classes 8 and 10 The following organizations appear in the ab
39、ove list: ANSI American National Standards Institute 25 West 43rdStreet, Fourth Floor New York, NY 10036-7406 ASME American Society of Mechanical Engineers (ASME International) Two Park Avenue New York, NY 10016-5990 ISO International Organization for Standardization 1, ch. de la Voie-Creuse, Case P
40、ostale 56 CH-1211 Geneva 20, Switzerland MSS Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE Vienna, VA 22180-4602 Listing of MSS Standard Practices (as of March, 2013) TITLE SP-6-2012 Standard Finishes for Contact Faces of Pipe Flanges and Connecti
41、ng-End Flanges of Valves and Fittings SP-9-2013 Spot Facing for Bronze, Iron, and Steel Flanges SP-25-2008 Standard Marking System for Valves, Fittings, Flanges, and Unions SP-42-2009 Corrosion Resistant Gate, Globe, Angle and Check Valves with Flanged and Butt Weld Ends (Classes 150, 300 & 600) SP-
42、43-2013 Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications SP-44-2010 Steel Pipeline Flanges (incl. 2011 Errata Sheet) SP-45-2003 (R 2008) Bypass and Drain Connections SP-51-2012 Class 150LW Corrosion Resistant Flanges and Cast Flanged Fittings SP-53-2012
43、 Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Components Magnetic Particle Examination Method SP-54-2013 Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Components Radiographic Examination Method SP-
44、55-2011 Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components Visual Method for Evaluation of Surface Irregularities (ANSI-approved American National Standard) SP-58-2009 Pipe Hangers and Supports Materials, Design, Manufacture, Selection, Application, and In
45、stallation (incorporates content of SP-69, 77, 89, and 90) (ANSI-approved American National Standard) SP-60-2012 Connecting Flange Joints between Tapping Sleeves and Tapping Valves SP-61-2009 Pressure Testing of Valves SP-65-2012 High Pressure Chemical Industry Flanges and Threaded Stubs for Use wit
46、h Lens Gaskets SP-67-2011 Butterfly Valves SP-68-2011 High Pressure Butterfly Valves with Offset Design SP-69-2003 Pipe Hangers and Supports Selection and Application (ANSI-approved American National Standard) SP-70-2011 Gray Iron Gate Valves, Flanged and Threaded Ends SP-71-2011 Gray Iron Swing Che
47、ck Valves, Flanged and Threaded Ends (incl. 2013 Errata Sheet) SP-72-2010a Ball Valves with Flanged or Butt-Welding Ends for General Service SP-75-2008 Specification for High-Test, Wrought, Butt-Welding Fittings SP-78-2011 Gray Iron Plug Valves, Flanged and Threaded Ends SP-79-2011 Socket Welding Re
48、ducer Inserts SP-80-2013 Bronze Gate, Globe, Angle, and Check Valves SP-81-2006a Stainless Steel, Bonnetless, Flanged Knife Gate Valves SP-83-2006 Class 3000 Steel Pipe Unions Socket Welding and Threaded SP-85-2011 Gray Iron Globe & Angle Valves, Flanged and Threaded Ends SP-86-2009 Guidelines for M
49、etric Data in Standards for Valves, Flanges, Fittings, and Actuators (Incl. 2011 Errata Sheet) SP-87-1991 (R 1996 Reinstated 2011) Factory-Made Butt-Welding Fittings for Class I Nuclear Piping Applications SP-88-2010 Diaphragm Valves SP-91-2009 Guidelines for Manual Operation of Valves SP-92-2012 MSS Valve User Guide SP-93-2008 Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Components Liquid Penetrant Examination Method SP-94-2008 Quality Standard for Ferritic and Martensitic Steel Castings for V
