阀门标准-MSS SP-82-1992(天选打工人).pdf
MSS SP-82 92 m 5770640 b500123 T m -./S T A N D A R D P R A C T I C E SP-82 1992 Edition VALVE PRESSURE TESTING METHODS Developed and Approved by the Manufacturers Standardization Society of the Valve and Fittings Industry,Inc.127 Park Street,N.E.Vienna,Virginia 22180(703)2814613 Originally Approved 1976 COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesMSS SP-82 92 W 5770640 0500324 3 I MSS STANDARD PRACTICE SP-82 An 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,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.I Substantive changes in this 1992 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.I US.cutomary units in the SP are the standard;the metric units are for reference only.Any part o f this standard may be quoted.Credit lines should read Extracted from MSS SP-82-1992,with permission o f the publisher,the Manufacturers Standard-ization Society.Reproduction prohibited under copyright convention unless written permissin is granted by the Manufacturers Standardization Society o f the Valve and Fittings Industry,Inc.Copyright G,1976 by Manufacturers Standardization Society of the Valve and Fittings Industry,Inc.Printed in U.S.A.COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesMSS SP-82 92 m 5770640 0580L25 3 m MSS STANDARD PRACTICE SP-82 FOREWORD Committees and Task Forces preparing standard practices covering valves are The metric units given in parentheses were derived utilizing the following encouraged to designate pressure test methods from the group listed herein.conversion factor,and rounded to appropriate accuracy.Conversion inch to millimeter psi to bars F to C CONTENTS Factor 25.4 0.0689 c=-F-32 1.8 PAGE FOREWORD.ii 1.SCOPE.1 2.DEFINITIONS.1 3.GENERAL TESTING PROCEDURES.1 4.VALVE PRESSURE TESTING REQUIREMENTS ANDTYPES.2 5.DURATIONOFTESTS.3 FIGURE 1-TEST DESIGNATION.2 ii COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesMSS SP-82 92 5770640 0500326 5 m MSS STANDARD PRACTICE SP-82 PRODUCTION PRESSURE TESTING METHODS FOR GENERAL PURPOSE VALVES 1.SCOPE This standard practice defines various types of production pressure tests that may be per-formed on valves,and covers provisions for identifying the actual type of tests used.It is not the purpose of this standard practice to cover or replace the valve testing performed by manufacturers on products made to con-form to other specifications or standards such as ANSI,API,Underwriters Laboratories,Factory Mutual,AWWA,Federal and Military Specifications.This document is intended as a guide to aid the manufacturer,the user,and the general public in the identification of test-ing methods used in the production of valves for which such methods are not otherwise defined in basic valve standards.2.DEFINITIONS 2.1 2.1.1 2.1.2 Production Pressure Test:Definition:Pressure tests which include closure member and shell tests per-formed on production units manu-factured for sale.Purpose:To verify the pressure con-taining capability of production units.Shell Test:Definition:An internal pressure test of the pressure containing envelope.Purpose:To demonstrate pressure containing capability of the external pressure boundary.Seat and Closure Member Test:Definition:An internal pressure test of flow regulating elements(seats,seals and closure member such as gate,disc,ball or plug).Purpose:To demonstrate static per-formance within allowable leakage tolerances.2.2 No Visible Leakage:2.2.1 Liquid:The term “no visible leakage”applied to a hydrostatic test liquid is defined as a leak rate which will produce no visible weeping or formation of drops at the pressure and for the duration of test.2.2.2 Gas:The term “no visible leakage”applied to air or gas testing is defined as a leak rate which will produce no visible formation of bubbles in a water immersion test or after the application of leak detection fluid at the pressure and for the duration of test.2.2.3 For automatic leak detection methods,this definition shall be considered equivalent to a leak rate no greater than 4.1 x in3/sec()(6.7 x 10“mllsec)with.a pressure differential I of SO to 100 psi(5.5 to 6.9 bar)for application to valves of 8NPS and smaller.I 3.GENERAL TESTING PROCEDURES 3.1 Shell Testing:Shell tests are to be per-formed in such a-manner as to insure that all intern1 pressure containing surfaces are ex-posed-to the test pressure.If test packing or temporary seals are used during testing of valves,production packing and/or seals shall not require testing.3.2 Seat Testing:3.2.1 Each main seat shall be tested in a manner which will test the tightness of the seat in the intended direction of sealing or in both directions on double seated valves when flow(1)This .leakage rate is based on the measured leakage of nitrogen gas from a needle valve with a 0.167 O.D.x 0.091”LD.tube discharge submerged in water to a depth of 1”.The tube end was cut square and smooth with no chamfers or burrs and the tube axis was parallel to the surface of the water.Leakage was adjusted to a level equal to 40 bubbles in 10 minutes at 90 psi.The 40 bubbles equaled 1.6 ml or,1 bubble 0.04 SCC,Using these data,a leak rate equivalent to 1 bubble every minute is found to be 4.I x in/sec(6.7 x lo4 ml/sec).I I 1 COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesNSS SP-82 92 m 57706413 0500127 7 E MSS STANDARD PRAmICE SP-82 flow direction is not indicated.Both seats of double disc gate valves may be tested simul-taneously by applying pressure in the bonnet cavity.3.2.2 In the case of globe valves,the seat shall be tested with pressure applied under the closed disc unless otherwise specified.3.2.3 The method of seat leakage testing on each seat shall be such that seat leakage cannot escape detection because of gradual pressuri-zation or filling of the cavity between seats in valves with two seats.4.VALVE PRESSURE TESTING REQUIRE-MENTS AND TYPES 4.1 Valves tested in accordance with this standard practice may be identified with the appropriate two or more letter test designa-tion signifying the type of test performed as shown in figure l.This test designation mark may be located on the valve nameplate,on the exterior surface of the valve body,shown on a document included with the valve pack-age,or otherwise shown on manufacturers documents.4.2 Shell Pressure Test Types(1)Test Desig-nation Test Type Definition B Each.valve assembly shall be given a shell test at a pressure not less than 1.5 times the lOOF(38C)rating rounded off to the next higher 25 psi(1 bar)-increment.The test shall be made with water which may(1)Alternate test methods such as volumetric loss testing machines are acceptable provided they are calibrated so that leakage rates are no greater than otherwise allowed based upon visual observation.The same test designa-tions may be used on products tested with automatic testing machines provided the pressure in the product under test is at least equal to the pressure for the desig-nation used and the test medium has a viscosity no greater than the viscosity of the test medium specified for the designation used.I-I TEST P T i I _ _ _ _ _ _-_ _ J SHELL TEST SEAT TEST LETTER LETTER DESIGNATION DESIGNATION TEST DESIGNATION Test Desig-nation B(cont.)C D F G Test Type Definition contain a corrosion inhibitor,with kero-sene,or with other suitable liquid pro-vided its viscosity is no greater than that of water,at a test temperature not above 125F(52C).The manufacturer at his option may use air or inert gas as the test medium.The test duration shall be as set forth in subsection 5.l.No visible leak-age is permitted in the valve pressure boundary except at the stem seal or test connections.Each valve assembly shall be given an air or other gas shell test at the lOOF(3 8 0 pressure rating.The test duration shall be as set forth in subsection 5.1,No visible leakage is permitted in the valve pressure boundary except at stem seal or test connections.Each valve assembly shall be given an air or other gas test at a minimum of 80 psi(5.5 bar)for a duration as set forth in subsection 5.l.No visible leakage is per-mitted in the valve pressure boundary except at stem seal or test connections.Another form of shell pressure testing is employed.Consult manufacturer for details.No shell pressure testing is performed,but other quality assurance provisions are made to insure the valve quality.Con-sult the manufacturer.2 COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesMSS STANDARD PRACTICE SP-82 4.3 Seat Pressure Test Tvoes()Test Desig-nation Test Type Definition W Each valve shall be given a seat test at a pressure not less than the pressure rating at lOOF(38C).The test shall be made with water which may contain a corro-sion inhibitor,with kerosene,or with other suitable liquid provided its vis-cosity is no greater than that of water,at a test temperature not above 125F(52C).The manufacturer at his option may use air or inert gas as the test medium.The test duration shall be as set forth in subsection 5.2.The allow-able leakage rate shall be that permitted by the appropriate standard for the indi-vidual type of valve or,otherwise,as agreed between the manufacturer and the purchaser.In the absence of estab-lished leakage criteria,valves with resili-ent seats shall show no visible leakage.(2)Test Desig-nation v(cont.)T V Each valve shall be given an air or other gas seat test at a minimum of 80 psi(5.5 bar).The test duration shall be as set forth in subsection 5.2.The allowable leakage rate shall be that permitted by the appropriate standard for the indi-vidual type of valve or,otherwise,as S R (1)Alternate test methods such as volumetric loss testing machines are acceptable provided they are calibrated so that leakage rates are no greater than otherwise allowed based upon visual observation.The same test designa-tions may be used on products tested with automatic testing machines provided the pressure in the product under test is at least equal to the pressure for the desig-nation used and the test medium has a viscosity no greater than the viscosity of the test medium specified for the designation used.Test Type Definition agreed between the manufacturer and the purchaser.In the absence of established leakage criteria,valves with resilient seats shall show no visible leakage,(:!1 Each valve shall be given a seat test at 45 to 55 psi(3.1 to 3.8 bar).The test shall be made with water which may con-tain a corrosion inhibitor,with kerosene,or with other suitable liquid provided its viscosity is no greater than that of water at a.test temperature not above 125F(52C);The manufacturer at his option may use air or inert gas as the test medium.The test duration shall be as set forth in subsection 5.2.The allow-able leakage rate shall be that permitted by the appropriate standard for the indi-vidual type of valve or,otherwise,as agreed between the manufacturer and the purchaser,In the absence of established leakage criteria,valves with resilient seats shall show no visible leakage-(2)Another form of seat pressure testing is employed.Consult manufacturer for details.No seat pressure testing is performed,but other quality assurance provisions are made to insure the valve quality.Consult the manufacturer.5.DURATION OF TESTS 5.1 Duration of Shell Test:As required to determine the integrityyof the pressure boun-dary after test pressure has been applied.(2)Resilient seats include rubber,polymers,PTFE,and other similar yieldable seating materials.Non-resilient 5.2 Duratiorl of Seat Test:As required to seats include metallic,ceramic,carbon graphite,and permit delermination that the seat seal satis-other similar hard seating materials.fies the acceptance criteria.COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesMSS SP-82 92 I 5770b40 0500327 O I LIST OF MSS STANDARD PRACTICES NUMBER SP-6-1990 SP-9-1992.SP-25-978(R 1983,88)SP-42-1990 SP-43-1991 SP-44-1991 SP-45-1992 SP-51-1991 SP-53-1985(R 1990)SP-54-1985(R 1990)SP-55-1985(R 1990)SP-58-1988 SP-60-1991 SP-61-1992 SP-65-1990 SP-67-1990 SP-68-1988 SP-69-1991 SP-70-1990 SP-71-1990 SP-72-1992 SP-73-1991 SP-75-1988 SP-77-1984(R 1990)SP-78-1987(R 1992)SP-79-1989.SP-80-1987 SP-8.1.-1981(R 1986,91)SP-82-1992 SP-83-1987 SP-84-I990 SP-85-1985 SP-86-1987(R 1992)SP-87-1991 SP-88-1983(R 1988)SP-89-1991 SP-90-1986(R 1991)SP-91-1990 SP-92-1987(R 1992)SP-93-1987(R 1992)SP-94-1983(R 1987 SP-95-1986(R 1991 SP-96-1991 SP-97-1987 SP-98-1992 SP-99-1989 SP-100-1988 SP-101-1989 SP-102-1989 SP-103-1990 SP-104-1990 SP-105-1990 SP-106-1990 SP-107-1991 SP-108-1991 SP-109-1991 SP-110-1992 Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings Spot Facing for Bronze,Iron and Steel Flanges Standard Marking System for Valves,Fittings,Flanges and Unions Class 150Corrosion Resistant Gate,Globe,Angle and Check Valves with Flanged and Butt Weld Ends Wrought Stainless Steel Butt-welding Fittings Steel Pipe Line Flanges Bypass and Drain Connections Class 150 LW Corrosion Resistant Cast Flanges and Flanged Fittings Quality Standard for Steel Castings and Forgings for Valves,Flanges,and Fittings and Other Piping Quality Standard for Steel Castings for Valves,Flanges and Fittings and Other Piping Components-Quality Standard for Steel Castings for Valves,Flanges and Fittings and Other Piping Components-Pipe Hangers and Supports-Materials,Design and Manufacture Connecting Flange Joint Between Tapping Sleeves and Tapping Valves Pressure Testing of Steel Valves High Pressure Chemical Industry Flanges and Threaded Stubs for Use with Lens Gaskets Butterf
