1、 MSS SP-6-2012 Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings 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: (
2、703) 281-6613 Fax: (703) 281-6671 E-mail: standardsmss-hq.org www.mss-hq.org MSS MSS STANDARD PRACTICE SP-6 i This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 102, 110, 201, and the MSS Coordinating Committee. The content of this Standard Practice is the re
3、sulting 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 and is intended as a basis for common practice by the manufacturer, the user, and th
4、e 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 Practice is established only by reference in other documents such as a code, specification
5、, 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 of this Standard Practice shall not be attributable to MSS and is solely the responsi
6、bility 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 to this Standard Practice at the date of approval of this MSS Standard Practice (se
7、e Annex A). 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 Standard Practice, no position is taken with respect to the validity of any potential
8、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 infringement of such rights are entirely their responsibility. In this Standard Practice, all
9、 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 appendices, if included, that appear in this document are construed as “supplemental”. Note t
10、hat supplemental information does not include mandatory requirements. Substantive changes in this 2012 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 edi
11、tion. U.S. customary units in this Standard Practice are the standard; (SI) metric units are for reference only. Non-toleranced dimensions in this Standard Practice are nominal, and, unless otherwise specified, shall be considered “for reference only”. Excerpts of this Standard Practice may be quote
12、d with permission. Credit lines should read Extracted from MSS SP-6-2012 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 pe
13、rmission is granted by the Manufacturers Standardization Society of the Valve and Fittings Industry Inc. All rights reserved. Originally Approved: December 1929 Originally Published: January 1930 Current Edition Approved: October 2011 Current Edition Published: March 2012 MSS is a registered tradema
14、rk of the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Copyright , 2012 by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-6 ii TABLE OF CONTENTS SECTION PAGE1 SCOPE . 1 2 DEFINITIONS . 1 3 RE
15、QUIREMENTS . 1 4 LIMITATIONS 1 TABLE 1 Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings . 2 FIGURE 1 Types of Contact Faces for Flanges 1 ANNEX A Referenced Standards and Applicable Dates 3 MSS STANDARD PRACTICE SP-6 1 STANDARD FINISHES FOR CONTAC
16、T FACES OF PIPE FLANGES AND CONNECTING-END FLANGES OF VALVES AND FITTINGS 1. SCOPE 1.1 This Standard Practice pertains to the finish of gasket contact faces of pipe flanges and end flanges of valves and fittings. 1.2 This Standard Practice is intended for applications to products for which ASME B16
17、Standards do not contain complete facing finish requirements or for which there are no such standards. 2. DEFINITIONS 2.1 Roughness Average The term “Ra” (Roughness average) is expressed in micro-inches (in) or micro-meters (m). 2.2 Flange Facing Finish The surface finish on the flange contact face
18、(see Figure 1) that comes in contact with a gasket upon flange assembly. 3. REQUIREMENTS 3.1 Flange facing finish shall be judged by visual comparison with “Ra” standards (see ASME B46.1) and not by instruments having stylus tracers and electronic amplification. The finishes required are given in Ta
19、ble 1. Other finishes may be furnished by agreement between purchaser and manufacturer. 3.2 Dimensions shown in Table 1 shall not be cause for rejection by depth gage measurement or precision instrument measurements. 4. LIMITATIONS 4.1 Surface finishes listed in Table 1 are not necessarily optimal f
20、or all gasket material types. 4.2 On flat faces, serrations need not extend beyond corresponding raised face diameter. FIGURE 1 Types of Contact Faces for Flanges MSS STANDARD PRACTICE SP-6 2 TABLE 1 Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fitting
21、s Types of Contact Faces Contact Face Materials Steel Ductile Iron Gray Iron Bronze Flat or 1/16 in. (1.6 mm) Raised Face and 1/4 in. (6.4 mm) Raised and Large Male ANSI/ASME B46.1-2009 Surface Texture (Surface Roughness, Waviness, and Lay) The following organizations appear in the above list: ANSI
22、American National Standards Institute 25 West 43rdStreet, Fourth Floor New York, NY 10036-7406 ASME American Society of Mechanical Engineers (ASME International) Three Park Avenue New York, NY 10016-5990 Listing of MSS Standard Practices TITLE SP-6-2012 Standard Finishes for Contact Faces of Pipe Fl
23、anges and Connecting-End Flanges of Valves and Fittings SP-9-2008 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 15
24、0, 300 & 600) SP-43-2008 Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications (Incl. 2010 Errata Sheet) SP-44-2010 Steel Pipeline Flanges (incl. 2011 Errata Sheet) SP-45-2003 (R 2008) Bypass and Drain Connections SP-51-2007 Class 150LW Corrosion Resistant F
25、langes and Cast Flanged Fittings SP-53-1999 (R 2007) Quality Standard for Steel Castings and Forgings for Valves, Flanges, and Fittings and Other Piping Components Magnetic Particle Examination Method SP-54-1999 (R 2007) Quality Standard for Steel Castings and Forgings for Valves, Flanges, and Fitti
26、ngs and Other Piping Components Radiographic Examination Method SP-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 Supp
27、orts Materials, Design, Manufacture, Selection, Application, and Installation (incorporates content of SP-69, 77, 89, and 90) (ANSI-approved American National Standard) SP-60-2004 Connecting Flange Joint between Tapping Sleeves and Tapping Valves SP-61-2009 Pressure Testing of Valves SP-65-2008 High
28、 Pressure Chemical Industry Flanges and Threaded Stubs for Use with 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 Gat
29、e Valves, Flanged and Threaded Ends SP-71-2011 Gray Iron Swing Check Valves, Flanged and Threaded Ends SP-72-2010 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 Thr
30、eaded Ends SP-79-2011 Socket Welding Reducer Inserts SP-80-2008 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 Th
31、readed Ends SP-86-2009 Guidelines for Metric 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 M
32、anual 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 Valves, Fla
33、nges, Fittings, and Other Piping Components Ultrasonic Examination Method SP-95-2006 Swage(d) Nipples and Bull Plugs SP-96-2011 Guidelines on Terminology for Valves and Fittings SP-97-2006 Integrally Reinforced Forged Branch Outlet Fittings Socket Welding, Threaded, and Buttwelding Ends SP-98-2012 P
34、rotective Coatings for the Interior of Valves, Hydrants, and Fittings SP-99-2010 Instrument Valves SP-100-2009 Qualification Requirements for Elastomer Diaphragms for Nuclear Service Diaphragm Valves SP-101-1989 (R 2001) Part-Turn Valve Actuator Attachment Flange and Driving Component Dimensions and
35、 Performance Characteristics SP-102-1989 (R 2001) Multi-Turn Valve Actuator Attachment Flange and Driving Component Dimensions and Performance Characteristics SP-104-2012 Wrought Copper Solder-Joint Pressure Fittings SP-105-2010 Instrument Valves for Code Applications SP-106-2012 Cast Copper Alloy F
36、langes and Flanged Fittings: Class 125, 150, and 300 SP-108-2012 Resilient-Seated Cast Iron Eccentric Plug Valves SP-109-1997 (R 2006) Welded Fabricated Copper Solder Joint Pressure Fittings SP-110-2010 Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends (incl. 2010 Errata Sh
37、eet) SP-111-2001 (R 2005) Gray-Iron and Ductile-Iron Tapping Sleeves SP-112-2010 Quality Standard for Evaluation of Cast Surface Finishes Visual and Tactile Method. This SP must be used with a 10-surface, three dimensional Cast Surface Comparator, which is a necessary part of the standard. Additiona
38、l Comparators available separately. SP-113-2001 (R 2007) Connecting Joint between Tapping Machines and Tapping Valves SP-114-2007 Corrosion Resistant Pipe Fittings Threaded and Socket Welding Class 150 and 1000 (ANSI-approved American National Standard) SP-115-2010 Excess Flow Valves, 1 NPS and Smal
39、ler, for Fuel Gas Service SP-116-2011 Service-Line Valves and Fittings for Drinking Water Systems SP-117-2011 Bellows Seals for Globe and Gate Valves SP-118-2007 Compact Steel Globe & Check Valves Flanged, Flangeless, Threaded & Welding Ends (Chemical & Petroleum Refinery Service) SP-119-2010 Factor
40、y-Made Wrought Belled End Pipe Fittings for Socket-Welding SP-120-2011 Flexible Graphite Packing System for Rising Stem Valves Design Requirements SP-121-2006 Qualification Testing Methods for Stem Packing for Rising Stem Steel Valves SP-122-2005 Plastic Industrial Ball Valves SP-123-1998 (R 2006) N
41、on-Ferrous Threaded and Solder-Joint Unions for Use with Copper Water Tube SP-124-2001 Fabricated Tapping Sleeves SP-125-2010 Gray Iron and Ductile Iron In-Line, Spring-Loaded, Center-Guided Check Valves SP-126-2007 Steel In-Line Spring-Assisted Center Guided Check Valves SP-127-2001 Bracing for Pip
42、ing Systems Seismic-Wind-Dynamic Design, Selection, Application SP-128-2006 Ductile Iron Gate Valves SP-129-2003 (R 2007) Copper-Nickel Socket-Welding Fittings and Unions SP-130-2003 Bellows Seals for Instrument Valves SP-131-2010 Metallic Manually Operated Gas Distribution Valves SP-132-2010 Compre
43、ssion Packing Systems for Instrument Valves SP-133-2010 Excess Flow Valves for Low Pressure Fuel Gas Appliances SP-134-2010 Valves for Cryogenic Service Including Requirements for Body/Bonnet Extensions SP-135-2010 High Pressure Knife Gate Valves SP-136-2007 Ductile Iron Swing Check Valves SP-137-20
44、07 Quality Standard for Positive Material Identification of Metal Valves, Flanges, Fittings, and Other Piping Components SP-138-2009 Quality Standard Practice for Oxygen Cleaning of Valves & Fittings SP-139-2010 Copper Alloy Gate, Globe, Angle, and Check Valves for Low Pressure/Low Temperature Plumb
45、ing Applications SP-140-2012 Quality Standard Practice for Preparation of Valves and Fittings for Silicone-Free Service SP-141-2012 Multi-Turn and Check Valve Modifications SP-142-2012 Excess Flow Valves for Fuel Gas Service, NPS 1 through 12 SP-143-2012 Live-Loaded Valve Stem Packing Systems (R YEA
46、R) Indicates year reaffirmed Price List Available Upon Request MSS is an ANSI-accredited American National Standards developer Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE, Vienna, VA 22180-4620 (703) 281-6613 Fax # (703) 281-6671 MSS-IHS SP-6-2012
