1、 MSS SP-140-2012 Quality Standard Practice for Preparation of Valves and Fittings for Silicone-Free Service 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-
2、6613 Fax: (703) 281-6671 E-mail: infomss-hq.org MSS www.mss-hq.org MSS STANDARD PRACTICE SP-140i FOREWORD This Standard Practice was developed by a cooperative effort of representatives of manufacturers, including those who produce silicone-free valves and fittings. It is based on current best pract
3、ices and on the collective experience of the industry at this time. MSS STANDARD PRACTICE SP-140ii This MSS Standard Practice was developed under the consensus of MSS Technical Committees 304, 401, 407, and the MSS Coordinating Committee. The content of this Standard Practice is the resulting effort
4、s 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 the general publ
5、ic. 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, sales contra
6、ct, 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 responsibility of the
7、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. This Standard Pr
8、actice 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 claim(s) or of any patent ri
9、ghts 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 text, notes, annexes, table
10、s, 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 that supplemental information
11、 does not include mandatory requirements. U.S. customary units in this Standard Practice are the standard; the SI (metric) units are for reference only. Non-toleranced dimensions in the Standard Practice are nominal, and, unless otherwise specified, shall be considered “for reference only“. Excerpts
12、 of this Standard Practice may be quoted with permission. Credit lines should read Extracted from MSS SP-140-2012 with permission of the publisher, Manufacturers Standardization Society of the Valve and Fittings Industry. Reproduction and/or electronic transmission or dissemination is prohibited und
13、er copyright convention unless written permission is granted by the Manufacturers Standardization Society of the Valve and Fittings Industry Inc. All rights reserved. Originally Approved: February 2011 Originally Published: November 2011 (2012 Edition) MSS is a registered trademark of the Manufactur
14、ers Standardization Society of the Valve and Fittings Industry, Inc. Copyright , 2011 by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-140iii TABLE OF CONTENTS SECTION PAGE 1 SCOPE . 1 2 OBJECTIVE 1 3 GENERAL REQUIREMENTS .
15、1 4 CLEANING . 1 5 ASSEMBLY AND TESTING OF VALVES 2 6 INSPECTION AND ACCEPTANCE CRITERIA 2 7 PACKAGING 3 8 MARKING 3 MSS STANDARD PRACTICE SP-1401 1. SCOPE 1.1 This Standard Practice establishes general requirements for valves and fittings for use in silicone-free service requiring an increased leve
16、l of cleanliness. Specific requirements include: a) Cleaning b) Assembly and Testing of Valves c) Inspection and Acceptance d) Packaging e) Marking 1.2 Purpose This Standard Practice is intended for applications such as painting systems which are sensitive to silicone contamination and for other ser
17、vices requiring an increased level of cleanliness above that of standard industrial valves. 2. OBJECTIVE 2.1 The objective of this Standard Practice is to present methods that, when properly applied and combined, will yield a degree of cleanliness suitable for silicone-free systems. 2.2 The proper c
18、ombination of methods depends upon the component(s), method of manufacture, and type(s) of contamination present. 3. GENERAL REQUIREMENTS 3.1 Any cleaning agent used must be compatible with the material of the component being cleaned. 3.2 Chloride-free cleaning agents shall be used on stainless stee
19、l. 3.3 This Standard Practice does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of this Standard Practices user to establish appropriate safety and health practices, and to determine the applicability of regulatory limitations. 3.4 Used
20、 cleaning solutions shall be disposed of in accordance with appropriate hazardous waste regulations. 3.5 Cleaning, inspection, post-clean testing, and packaging shall be conducted by properly trained and qualified personnel knowledgeable of this Standard Practice. 4. CLEANING 4.1 Valves Prior to ass
21、embling the valve, all parts shall be separately cleaned per the following procedure: 4.1.1 The area for cleaning shall be clean and dust-free. All cleaning shall be performed in an area that is free from silicone and airborne silicone particles. 4.1.2 The assembly bench shall be covered with a clea
22、n polyethylene sheet or equivalent. 4.1.3 A full-length lint-free lab coat, or equivalent, and lint-free gloves shall be worn while in the cleaning area. 4.1.4 All valve part surfaces shall be thoroughly cleaned using appropriate cleaning agents, per instructions provided by the cleaning agent manuf
23、acturer. 4.1.4.1 Material Safety Data Sheets (MSDS) shall be consulted for proper handling of cleaning agents. 4.1.4.2 Some solvents may damage non-metallic parts of the valve. The cleaning agent manufacturer should be consulted for compatibility with valve part materials, or sample parts should be
24、tested to ensure the cleaning agent is not harmful to the part. 4.1.5 Clean all surfaces which may contact the valve to remove all traces of silicone. QUALITY STANDARD PRACTICE FOR PREPARATION OF VALVES AND FITTINGS FOR SILICONE-FREE SERVICE MSS STANDARD PRACTICE SP-1402 4.2 Fittings All fittings sh
25、all be cleaned per the following procedure: 4.2.1 The area for cleaning shall be clean and dust-free. All cleaning shall be performed in an area that is free from silicone and airborne silicone particles. 4.2.2 A full-length lint-free lab coat, or equivalent, and lint-free gloves shall be worn while
26、 in the cleaning area. 4.2.3 Each fitting shall be thoroughly cleaned using appropriate cleaning agents, per instructions provided by the cleaning agent manufacturer. 4.2.3.1 Material Safety Data Sheets (MSDS) shall be consulted for proper handling of cleaning agents. 4.2.3.2 Some solvents may damag
27、e non-metallic fittings. The cleaning agent manufacturer should be consulted for compatibility with fitting material, or sample fittings should be tested to ensure the cleaning agent is not harmful to the fitting. 5. ASSEMBLY AND TESTING OF VALVES 5.1 All assembly tools shall be cleaned with accepta
28、ble cleaning agents. 5.2 Assembly shall occur in a clean and dust-free environment. 5.3 Assemble the valve and conduct testing as per the appropriate product standard. 5.3.1 Surfaces of the test equipment coming in contact with the valve should be cleaned with an appropriate cleaning agent. 5.3.2 Te
29、sting shall not introduce silicone into the valve as a byproduct. Note: The assembly and/or testing of fittings may not be typical; however, if such processes are necessary, as agreed between the purchaser and fitting manufacturer, then Section 5 shall be followed. 6. INSPECTION AND ACCEPTANCE CRITE
30、RIA 6.1 This inspection and acceptance test shall be utilized unless an alternative procedure is required by the purchaser. The silicone-free test utilizes degreaser LPS ZeroTri Super Cleaner/Degreaser, AMTEX-CCR, or equivalent, or solvent specified by the valve or fitting purchaser. Degreasers shou
31、ld be handled and disposed of in accordance with MSDS and all governmental and environmental requirements. The manufacturer shall verify that the degreaser will not react with the test paint used in Section 6.4. 6.2 Prepare a test plate to verify the valve or fitting is free of silicone contaminatio
32、n. Clean a stainless steel plate (typical size is 6“ x 6“ (152mm x 152 mm), however, plate should be sized to capture all of the run-off) with appropriate degreaser and allow to dry. Wipe the test plate with an isopropyl alcohol soaked, lint-free cloth, to eliminate any static charge. Allow to dry t
33、horoughly. Spray all interior and exterior surfaces of the valve or fitting with the specified degreaser and catch the liquid run-off on the prepared test plate. 6.3 The degreaser shall be allowed to dry (degreaser will evaporate rapidly). Avoid breathing degreaser vapors. 6.4 The plate shall be spr
34、ayed with an acrylic spray paint or other type of paint, as specified by the purchaser. Silicone will prevent the paint from sticking to the plate, creating defects (“fish-eyes“ or bubbles) in the painted finish. 6.5 Any visual paint defect, including “fish-eyes” or bubbles, is cause for rejection.
35、6.6 Multiple valves or fittings, up to a total of 15, may be tested by spraying each sample and dripping onto a single stainless steel test plate and then processing as specified. All valves or fittings are either accepted or rejected by the test. MSS STANDARD PRACTICE SP-1403 6.7 Fittings may be in
36、spected per a random sampling plan, deemed acceptable by agreement between the purchaser and fitting manufacturer. 7. PACKAGING 7.1 Valves The valve opening should be covered with protective metal or plastic caps or plugs that have been cleaned as per this Standard Practice. The inspected and accept
37、ed valve assembly shall be individually wrapped with a minimum 0.003“ (0.0762mm) unused polypropylene plastic(a)and sealed with reinforced tape. Other packaging materials are acceptable by agreement between the purchaser and valve manufacturer. 7.2 Fittings Fittings that have been cleaned per this S
38、tandard Practice shall be packaged individually, or in multiple quantities, in an unused polypropylene plastic(a)bag with a 0.003“ (0.0762mm) minimum thickness. The bag shall be heat-sealed to prevent contaminants from entering. Other packaging materials are acceptable by agreement between the purch
39、aser and fitting manufacturer. 8. MARKING 8.1 The outside of the packaging is to be marked with: a) “Silicone-Free Per MSS SP-140” b) Manufacturers name and product identification number c) Date of packaging d) “Keep sealed until required for use” Note: (a)Unused polypropylene plastic inherently ref
40、ers to a “clean” product that is free of grease and silicone, or other contaminants. Listing of MSS Standard Practices TITLE 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-
41、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-43-2008 Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Application
42、s (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 Flanges and Cast Flanged Fittings SP-53-1999 (R 2007) Quality Standard for Steel Castings and Forgings for Valves, Flang
43、es, 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 Fittings and Other Piping Components Radiographic Examination Method SP-55-2011 Quality Standard for Steel Castings for Valv
44、es, 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 Installation (incorporates content of SP-69, 77, 89, a
45、nd 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 Pressure Chemical Industry Flanges and Threaded Stubs for Use with Lens Gaskets SP-67-2011 Butterfly Valves SP-68-2011
46、 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 Check Valves, Flanged and Threaded Ends SP-72-2010 Ball
47、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 Reducer Inserts SP-80-2008 Bronze Gate, Globe, Angle, and Check Valves SP-81-2006a
48、 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 Metric Data in Standards for Valves, Flanges, Fittings, and Actuators (Incl. 2011
49、 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-92-1999 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, Flanges, Fittings, and Other Piping Components Ultrasonic Examination Method SP-95-2006 Swag
