1、 MSS SP-132-2010 Compression Packing Systems for Instrument Valves Standard Practice Developed and Approved by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE Vienna, Virginia 22180 Phone: (703) 281-6613 Fax: (703) 281-6671 E-mail: infomss-hq.or
2、g www.mss-hq.org MSS STANDARD PRACTICE SP-132iThis MSS Standard Practice was developed under the consensus of the MSS Technical Committee 115 and the MSS Coordinating Committee. The content of this Standard Practice is the result of the efforts of competent and concerned volunteers to provide an eff
3、ective, clear, and non-exclusive specification that will benefit the industry as a whole. This MSS Standard Practice 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
4、, sale, or use of products not conforming to the Standard Practice. Mandatory conformance is established only by reference in a code, specification, sales contract, or public law, as applicable. “Other standards documents referred to herein are identified by the date of issue that was applicable to
5、this Standard Practice at the date of issue of this Standard Practice. See Annex A. This Standard Practice shall remain silent on the applicability of those other standards of prior or subsequent dates of issue even though applicable provisions may not have changed. References contained herein which
6、 are bibliographic in nature are noted as supplemental in the text.” Unless otherwise specifically noted in this MSS SP, any standard referred to herein is identified by the date of issue that was applicable to the referenced standard(s) at the date of issue of this MSS SP. (See Annex A.) In this St
7、andard Practice all notes, annexes, tables, and figures are construed to be essential to the understanding of the message of the standard, and are considered part of the text unless noted as “supplemental“. All appendices appearing in this document are construed as “supplemental“. Supplemental“ info
8、rmation does not include mandatory requirements. Substantive changes or reformatting in this 2010 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.
9、 U.S. customary units in this SP are the standard; the metric (SI) units are for reference only. Any part of this Standard Practice may be quoted. Credit lines should read Extracted from MSS SP-132-2010 with permission of the publisher, Manufacturers Standardization Society of the Valve and Fittings
10、 Industry, Inc. Reproduction prohibited under copyright convention unless written permission is granted by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Originally Approved: August 2004 Copyright , 2004, 2010 by Manufacturers Standardization Society of the Valve and
11、Fittings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-132iiTABLE OF CONTENTS SECTION PAGE 1 SCOPE . 1 2 DEFINITIONS . 1 3 PACKING MATERIALS 1 4 DESIGN . 1 5 TESTING . 2 ANNEX A Referenced Standards and Applicable Dates 3 MSS STANDARD PRACTICE SP-13211. SCOPE 1.1 This Standard Practice p
12、rovides requirements for valve packings, packing chambers, and associated components as they relate to the total packing assembly of instrumentation valves. 1.2 This Standard Practice is intended to apply to valves used in instrument piping systems. (See MSS SP-99, Instrument Valves, and MSS SP-105,
13、 Instrument Valves for Code Applications). 1.3 This Standard Practice applies to valves in which a compression packing assembly is used as the primary stem sealing system. 2. DEFINITIONS 2.1 Packing The pressure retaining seal at the interface between the stem and the pressure containing boundary. 2
14、.2 Terminology Other definitions may be found in MSS SP-96, Guidelines on Terminology for Valves and Fittings. 3. PACKING MATERIALS 3.1 Graphitic Packings 3.1.1 Applicable Grade Designations Ring Type Grade A Grade B Die Formed Braided - 3.1.2 Purity Requirements (min.) Grade A Grade B Graphitic 99%
15、 95% Carbon (Braided only) 95% - 3.1.3 Detrimental Material Limits (max. ppm) Grade A Grade BMercury (Hg) 200 200 Sulfur (S) 750 1000 Total halogens (Chlorine,bromine, fluorine) 500 500 3.1.4 Prohibited Additions There shall be no intentional additions of antimony (Sb), arsenic (As), bismuth (Bi), c
16、admium (Cd), gallium (Ga), indium (In), lead (Pb), silver (Ag), or tin (Sn) during the manufacturing, fabrication, handling or packaging of the product. 3.1.5 Corrosion Inhibiting Treatments Unless specified to be free of corrosion inhibiting additives, graphitic packings may be provided with a powd
17、ered zinc (Zn) active corrosion inhibiting treatment and/or a passive inhibiting treatment such as phosphorus or barium molybdate. 3.2 Plastic Packings Acceptable materials include but are not limited to virgin PTFE (Polytetrafluoroethylene), PFA (Perfluoroalkoxy), PEEK (Polyetheretherketone), and U
18、HMWPE (Ultra-High Molecular Weight Polyethylene), plus filled variations thereof. 4. DESIGN 4.1 General The design of packing systems shall be in accordance with the manufacturers standard and proof of design shall be documented. 4.2 Stems 4.2.1 Finish Shall be 16 Ra surface micro inches (0.40 surfa
19、ce microns) or better. The stem surface finish requirement shall apply in the area that contacts the packing during the full stroking of the valve. 4.2.2 The stem outside diameter that contacts the packing during the full stroking of the valve shall meet circularity, taper, and straightness requirem
20、ents encompassed in a cylindricity tolerance of 0.001 in. (0.02mm). 4.2.3 The stem surface that contacts the packing during full stroking of the valve shall be free of scratches, pits, or voids deeper than 0.0005 in. (0.01mm). COMPRESSION PACKING SYSTEMS FOR INSTRUMENT VALVES MSS STANDARD PRACTICE S
21、P-13224.3 Packing Chambers 4.3.1 Finish Shall be 63 Ra surface micro inch (1.6 surface microns) or better through 80% of the bore with the remaining finish not to be greater than 125 Ra surface micro inch (3.18 surface microns). 4.3.2 Packing chamber surfaces that contact the packing shall be free o
22、f scratches, pits, or voids deeper than 0.001 in. (0.02mm). 4.4 Recommended Design Considerations 4.4.1 The tolerance on the valve bonnet or the packing washer, when a packing washer is used, shall be such that the diametrical clearance between the stem and the bonnet or packing washer is no greater
23、 than 0.005 in. (0.1mm). 5. TESTING 5.1 Qualification Testing 5.1.1 Qualification testing requirements shall be per the manufacturers standard unless otherwise specified. 5.2 Production Testing 5.2.1 Production testing shall be conducted per MSS SP-99 or MSS SP-105, as appropriate. MSS STANDARD PRAC
24、TICE SP-1323ANNEX 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 MSS SP-96-2001 (R 2005) Guidelines on Terminology for Valves and Fittings SP-99-1994 (R 2005) Instrument
25、 Valves SP-105-1996 (R 2005) Instrument Valves for Code Applications Publications of the following organization appear in the above list: MSS Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE Vienna, VA 22180-4602 Listing of MSS Standard Practices TIT
26、LE SP-6-2007 Standard Finishes for Contact Faces of Pipe Flanges 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 a
27、nd Check Valves with Flanged and Butt Weld Ends (Classes 150, 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 SP-45-2003 (R 2008) Bypass and Drain Connections SP-51-2007
28、Class 150LW Corrosion Resistant Flanges 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 Forg
29、ings for Valves, Flanges, and Fittings and Other Piping Components - Radiographic Examination Method SP-55-2006 Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Visual Method for Evaluation of Surface IrregularitiesSP-58-2009 Pipe Hangers and Supports
30、- Materials, Design, Manufacture, Selection, Application, and Installation SP-60-2004 Connecting Flange Joint Between Tapping Sleeves and Tapping Valves SP-61-2009 Pressure Testing of Valves SP-65-2008 High Pressure Chemical Industry Flanges and Threaded Stubs for Use with Lens Gaskets SP-67-2002a B
31、utterfly Valves SP-68-1997 (R 2004) High Pressure Butterfly Valves with Offset Design SP-69-2003 Pipe Hangers and Supports - Selection and Application (ANSI-approved American National Standard) SP-70-2006 Gray Iron Gate Valves Flanged and Threaded Ends SP-71-2005 Gray Iron Swing Check Valves, Flange
32、d 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-77-1995 (R 2000) Guidelines for Pipe Support Contractual Relationships - Relationships and Responsibilities of the Pipe Hanger Co
33、ntractor with the Purchasers Engineer or the Pipe Fabricator and/or Erector SP-78-2005a Gray Iron Plug Valves Flanged and Threaded Ends SP-79-2009 Socket Welding Reducer Inserts SP-80-2008 Bronze Gate, Globe, Angle, and Check Valves SP-81-2006a Stainless Steel, Bonnetless, Flanged Knife Gate Valves
34、SP-83-2006 Class 3000 Steel Pipe Unions Socket Welding and Threaded SP-85-2002 Gray Iron Globe & Angle Valves Flanged and Threaded Ends SP-86-2009 Guidelines for Metric Data in Standards for Valves, Flanges, Fittings, and Actuators SP-88-2010 Diaphragm Valves SP-89-2003 Pipe Hangers and Supports - F
35、abrication and Installation Practices SP-90-2000 Guidelines on Terminology for Pipe Hangers and Supports SP-91-2009 Guidelines for Manual Operation of Valves SP-92-1999 MSS Valve User Guide SP-93-2008 Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Co
36、mponents - Liquid Penetrant Examination MethodSP-94-2008 Quality Standard for Ferritic and Martensitic Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Ultrasonic Examination Method SP-95-2006 Swage(d) Nipples and Bull Plugs SP-96-2001 (R 2005) Guidelines on Terminology fo
37、r Valves and Fittings SP-97-2006 Integrally Reinforced Forged Branch Outlet Fittings - Socket Welding, Threaded, and Buttwelding Ends SP-98-2001 (R 2005) Protective Coatings for the Interior of Valves, Hydrants, and Fittings SP-99-1994 (R 2005) Instrument Valves SP-100-2009 Qualification Requirement
38、s for Elastomer Diaphragms for Nuclear Service Diaphragm Valves SP-101-1989 (R 2001) Part-Turn Valve Actuator Attachment - Flange and Driving Component Dimensions and Performance Characteristics SP-102-1989 (R 2001) Multi-Turn Valve Actuator Attachment - Flange and Driving Component Dimensions and P
39、erformance Characteristics SP-104-2003 Wrought Copper Solder Joint Pressure Fittings SP-105-1996 (R 2005) Instrument Valves for Code Applications SP-106-2003 Cast Copper Alloy Flanges and Flanged Fittings Class 125, 150 and 300 SP-108-2002 Resilient-Seated Cast-Iron Eccentric Plug Valves SP-109-1997
40、 (R 2006) Welded Fabricated Copper Solder Joint Pressure Fittings SP-110-2010 Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends SP-111-2001 (R 2005) Gray-Iron and Ductile-Iron Tapping Sleeves SP-112-1999 (R 2004) Quality Standard for Evaluation of Cast Surface Finishes - Vi
41、sual 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. Additional Comparators available separately. SP-113-2001 (R 2007) Connecting Joint between Tapping Machines and Tapping Valves SP-114-2007 Corrosion
42、Resistant Pipe Fittings Threaded and Socket Welding Class 150 and 1000 SP-115-2006 Excess Flow Valves, 1 1/4 NPS and Smaller, for Fuel Gas Service SP-116-2003 Service-Line Valves and Fittings for Drinking Water Systems SP-117-2006 Bellows Seals for Globe and Gate Valves SP-118-2007 Compact Steel Glo
43、be & Check Valves - Flanged, Flangeless, Threaded & Welding Ends (Chemical & Petroleum Refinery Service) SP-119-2003 Factory-Made Wrought Belled End Socket-Welding Fittings SP-120-2006 Flexible Graphite Packing System for Rising Stem Steel Valves - Design Requirements SP-121-2006 Qualification Testi
44、ng Methods for Stem Packing for Rising Stem Steel Valves SP-122-2005 Plastic Industrial Ball Valves SP-123-1998 (R 2006) Non-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, C
45、enter-Guided Check Valves SP-126-2007 Steel In-Line Spring-Assisted Center Guided Check Valves SP-127-2001 Bracing for Piping 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-
46、2003 Bellows Seals for Instrument Valves SP-131-2004 Metallic Manually Operated Gas Distribution Valves SP-132-2010 Compression Packing Systems for Instrument Valves SP-133-2005 Excess Flow Valves for Low Pressure Fuel Gas Appliances SP-134-2006a Valves for Cryogenic Service Including Requirements f
47、or Body/Bonnet Extensions SP-135-2006 High Pressure Steel Knife Gate Valves SP-136-2007 Ductile Iron Swing Check Valves SP-137-2007 Quality Standard for Positive Material Identification of Metal Valves, Flanges, Fittings, and Other Piping Components SP-138-2009 Quality Standard Practice for Oxygen C
48、leaning of Valves & Fittings SP-139-2010 Copper Alloy Gate, Globe, Angle, and Check Valves for Low Pressure/Low Temperature Plumbing Applications (R YEAR) Indicates year standard reaffirmed without substantive changes Price List Available Upon Request MSS is an ANSI-accredited American National Stan
49、dards developer. A number of former MSS Standard Practices have been adopted and published by other developers as American National Standards. In order to maintain a single source of authoritative information, MSS has withdrawn its Standard Practices in such cases. Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, N.E., Vienna, VA 22180-4620 (703) 281-6613 Fax # (703) 281-6671 MSS-IHS SP-132-2010
