1、FED-DEPT-DEF SP-72 3772 2575512 0077380 383 MSS SP-72 ADOPTION NOTICE MSS SP-72,Ball Valves with Flanged or Butt-welding Ends for General Service,was adopted on 18 February 1994,for use by the Department of Defense (DoD).Proposed changes by DoD activities must be submitted to the DoD Adopting Activi
2、ty:Naval Construction Battalion Center,1000 23rd Avenue,Code 156,Port Hueneme,CA 93043-4301.DoD activities may obtain copies of this standard from the Standardization Document Order Desk,700 Robbins Avenue,Building 4D,Philadelphia,PA 19111-5094.The private sector and other Government agencies may pu
3、rchase copies from Manufacturers Standardization Society of the Valve and Fittings Industry,Inc.,127 Park Street,N.E.,Vienna,VA 22180.Custodians:Army-ME Navy-YD1 Air Force-99 Review Activities:D M -CS Adopting Activity:Navy-YD1(Project 4820-0644)FSC 4820 DISTRIBUTION STATEMENT A.Appro:,:+l i c relea
4、se;distribution is un1 imi ted.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 S P-72-1 Ball Valves with Flanged or
5、Butt-Welding Ends for General Service Standard Practice Developed and Approved by the Manufacturers Standardization Society of the Valve and Fittings Industry,Inc.127 Park Street,N.E.Vienna,Virginia 22180(703)281-661 3 COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed
6、 by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesAn 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
7、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 laws,as applicable.Substantive changes in this 1999 edition are“flagged”by para
8、llel 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.U.S.customary units in this SP are the standard;the metric units are for reference only.Unless otherwise specifically noted in t
9、his 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.)Any part of this standard may be quoted.Credit lines should read extractedfrom MSS SP-72,1999,with pennission of the publis
10、hel;the Manufacturers Standardization Society.Reproduction prohibited under copyright convention unless written permission is granted by the Manufactures Standardization Society of the Valve and Fittings Industq Inc.Originally Approved February,1970 1 COPYRIGHT Manufacturers Standardization Society
11、of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesFOREWORD The 1999 Edition of MSS SP-72 has been updated from the 1992 Edition by revising material names in Section 1.4,
12、2.1.5.,2.1.6,and 4.1.Metric data(DN)and(PN)was added to Section 1.3,3.1.1,5.2.2.1,7.1.3,7.1.4,7.2.2,7.2.3,and Table 1.The formulas in paragraph 7.1.4 and 7.2.2 have been revised to agree with MSS LS.9 format.The reference to NPS was corrected in all applicable paragraphs.Annex A listing all referenc
13、ed documents has been added.1 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 ServicesMSS STD*MSS SP-72-ENGL 1999 5770bll0 05
14、0119b 960 W STANDARD PRACTICE SP-72 CONTENTS SECTION PAGE FOREWORD 11 CONTENTS.111 1.SCOPE.1 2.SERVICE PRESSURE RATINGS.1 3.VALVE PORT SIZES.1 4.MATERIALS.1 5.DESIGN.2 6.MARKETING.2.7.TESTING.2 TABLE 1 PORT SIZES FOR LESS THAN FULL PORT BALL VALVES.5 FIGURE 1 EXAMPLES OF BODY CONSTRUCTION.6 FIGURE 2
15、 NOMENCLATURE FOR BALL VALVE PARTS,TYPICAL.7 ANNEX A LIST OF REFERENCED STANDARDS.8.111 COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information H
16、andling Services STD-MSS SP-72-ENGL 1799 5770bllU 050LL117 BT?MSS STANDARD PRACTICE SP-72 BALL VALVES WITH FLANGED OR BUTT-WELDING ENDS FOR GENERAL SERVICE 1.SCOPE 1.1 This Standard Practice covers flanged or butt-weld end ball valves having in general,but not restricted to,round openings which may
17、be full port,regular port,or reduced port types.The following characteristics shall be considered standard prac-tice unless otherwise specified by agreement be-tween manufacturer and purchaser.1.2 Valves covered by this Standard Practice are suitable for use in general liquid and gas service.Their s
18、ervice pressures and temperatures generally conform to standards cited in Paragraph 2,but may be restricted by the materials used for their seats and seals,or by other special considerations.1.3 The size range covered by this Standard Prac-tice is NPS 112(DN 15)through NPS 36 (DN 900).1.4 This Stand
19、ard Practice covers ball valves of the following materials:carbon steel alloy steels stainless steels ductile iron gray iron copper alloy 1.5 Names o f common valve body types are given in Figure 1.When variations or other body types are used,they may be named by the manufacturer.The names of basic
20、valve parts are given in Figure 2.Other parts may be named by the manufacturer.Body types and valve parts may also be identified by applicable MSS or other terminology standards.2.SERVICE PRESSURE RATINGS 2.1 The pressure-temperature rating of flanged and butt-welding end ball valves shall conform t
21、o those set forth in the Standards listed below,except as they are limited by their seat and seal materials.2.1.1 Carbon Steel ASME B 16.5-1996&ASME B16.34-1996 2.1.2 Alloy Steel ASMEB16.5-19968 ASME B 16.34-1996 2.1.3 Stainless Steel ASME B1651996&ASME B16.34-1996 2.1.4 Ductile Iron ASME B16.42-198
22、7 I 2.1.5 Gray Iron ASME B16.1-1989 2.1.6 CopperAlloy ASME B16.24-1991 I 2.2 Cold Working Pressure(CWP).The cold working pressure rating of the valve shell and com-ponents is the rated pressure at loo F(38 C)for carbon steel,alloy steel,stainless steel,and duc-tile iron,and 150 F(66 C)for copper all
23、oy.The maximum working pressure at any other tempera-ture shall not exceed this rated pressure.3.3.1 Ball valves may be furnished as either f u l l port,regular port or reduced port.4.1 3.1.1 Full Port valves are defined as having mini-mum bore diameters as specified in Annex A of ASME B16.34 for va
24、lves up to NPS 30(DN 750).A tolerance of-.O6 inches(1.52 mm)is allowed on W S 12(DN 300)and smaller valves.A tolerance of -0.12 inches(3.05 mm)is allowed on NPS 14(DN 350)and larger valves.Oversize tolerance is not specified.For valves above NPS 30(DN 750),bore diameter shall be as agreed upon betwe
25、en pur-chaser and manufacturer.3.1.2 Re 1 valves have bore diameters smaller than full bore and shall be as listed in Table 1.MATERIALS 4.1 Valve Shell parts and Bolting-The valve shell parts are defned as those which contain pressure within the piping but do not include the ball,seats,seals,and oth
26、er parts.This standard covers only pres-sure retention bolting.Mechanical connections and bolting for end flanges are not included.Recommended materials for valve shell parts and bolting are those which are in confomce to the specifications listed in 2.1.1 through 2.1.6.When alternate materials are
27、used,the manufacturer shall COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesSTD-MSS SP-72-ENGL L999 W 5770b40 050LL4B 73
28、3 MSS STANDARD PRACTICE SP-72 be prepared to certify,based on documentation from producer or recognized distributor of these alternate materials,that the products are at least equally suit-able for the intended use.4.2 Other Parts-Parts such as stems,glands,gland bushings,balls,handwheels,gearing an
29、d motor drive,and seats or seals,shall be of materials suit-able for the service.Non-metallic seats or seals,when employed,shall be designed by the manufacturer with suitable material selected for compatibility with the temperature,pressure and line fluids for which the valves are recommended.5.DESI
30、GN 5.1 The design of the valve shell be such as to pro-vide against any detrimental distortion under hydro-static test conditions,assembly stresses,closing stresses,pipe reaction stresses or when rated pres-sure is applied across a closed valve.5.2 End Connections and End Preuaration 5.2.1 End flang
31、e dimensions shall conform to those set forth in the applicable standards listed in Par.2.1.1 to 2.1.6,or MSS SP-44.I 5.2.2 Butt Weldin3 Ends 5.2.2.1 Sizes NPS 6 CDN 150)and smaller of carbon steel.Class 150 through 9 0 0 (PN 20 through 150)Unless otherwise specified,butt-welding ends shall conform
32、to ASME B 16.34 and valve ends shall be bored to match Schedule 40 Pipe for Class 150 and 300(PN 20 and SO),and Schedule 80 Pipe for Class 400 through 900(PN 68 through 150).5.2.2.2 Sizes NPS 2 and smaller of stainless steel.Class 150 and 300(PN 20 and 50)Unless otherwise specified,butt-welding ends
33、 shall be bored to match Schedule 10s Pipe.5.2.2.3 For all other butt welding end valves cov-ered by this Standard Practice,the purchaser shall specify the bore of the valve ends.Unless other-wise specified by the purchaser,the welding end preparation shall be optional with the manufacturer.5.3 Valv
34、e Length 5.3.1.Face-to-Face dimensions of flanged ball valves shall conform to ASME B 16.10(Note Full port or top opening valves may not be available within the short pattern lengths shown in ASME B 16.10.These valves may have face-to-face dimensions as agreed upon by the purchaser and manufacturer.
35、)5.3.2 End-to-end dimensions of butt-welding end ball valves shall conform to ASME B16.10,or such other dimensions as shall be agreed upon by the pur-chaser and manufacturer.5.4 Auxilia?Connections 5.4.1 When connections are provided,they shall be in accordance with ASME B 16.34.The number and locat
36、ion shall be optional with the manufacturer or by agreement between the manufacturer and the pur-chaser.5.5 Operation -Valves shall be furnished with a means of operation,such as a lever or actuator,adequately sized to actuate the valve with reasonable effort by the operator under the rated working
37、pressure.5.6 Position Indication-Stems,stem extensions,adapters and actuators shall be provided with positive means for indicating port position.6.MARKING 6.1 Ball valves shall be marked in accordance with MSS SP-25.7.TESTING 7.1 Shell Test 7.1.1 Ball valves shall be given a hydrostatic shell test a
38、t 1-112 times the rated cold working pressure of the valve.7.1.2 The ball shall be partially open during the shell test unless other means are provided for assur-ing equalization of pressure throughout the shell.7.1.3 The duration of the shell test shall not be less than shown below:Valve Size Test
39、Time 2-112-8 65-200 120 Time duration is the period of inspection after the valve is fully prepared and under test pressure.2 COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardization Society of the Valve
40、 and FittingsLicensed by Information Handling ServicesMSS 7.1.4 For valves of Class 150(PN 20)and Class 300(PN 50),in sizes NPS 3 N 80)and smaller,a minimum of 80 psig(6 Bar)gas test with a mini-mum 15 second duration may be substituted.How-ever,if this option is exercised,the manufacturer shall be
41、able to certify that a production sample of the size valve so-tested was subjected to a hydro-static shell test of F times cold working pressure of valve where F=2 AYS/MYS F=2 AYS2/MYS2 F=2 AYS3/MYS3 or or whichever is larger,with no demmental distortion and where AYS=Actual Yield Strength of Body M
42、 Y S =Minimum Specified Yield AYS2=Average Yield Strength of Bonnet MY S2=Minimum Specified Yield AYS3=Average Yield Strength of MYS3=Minimum Specified Yield Strength of Bonnet Strength of Bonnet Bonnet Bolting Strength of Bonnet Bolting.7.1.5 Visually detectable leakage through pres-sure boundary w
43、alls is not acceptable.Leakage through the stem packing shell not be cause for re-jection.The stem packing shall be capable of re-taining pressure at least equal to the rated cold work-ing pressure of the valve without visible leakage.7.2 Seat Tests 7.2.1 Ball valves shall be given a seat test in a
44、manner which will test the tightness of the seat in the direction of flow as indicted on the valve,or in both directions,when flow direction is not indicated on valve.The method of seat leakage testing on each seat shall be such that no seat leakage can es-cape detection because of gradual pressuriz
45、ation or filling of cavity between two seats.Also the method of testing shall apply the pressure differential on the tested seat in the same direction as pressure is ap-plied on this seat in service.I 7.2.2 Ball valves shall be given a hydrostatic seat test at the rated cold working pressure of the
46、valve.On valves NPS 12(DN 300)and smaller,an 80 psig(6 Bar)gas seat test may be substituted for the hydro-static seat test.However,if this option is exercised,the manufacture shall be able to certify that a produc-tion sample of the size so tested was subjected to a hydrostatic seat test of F times
47、cold working pressure of valve.where F=2 AYS4/MYS4 F=2 AYSMYS F=2 AYS6MY S6 or or whichever is larger,with no detrimental distortion of ball,stem,or trunnion and where AYS4=Actual Yield Strength of Ball MYS4=Minimum Specified Yield Strength of Ball AYS5=Average Yield Strength of Stem MYS5=Minimum Sp
48、ecified Yield Strength of Stem AYS6=Average Yield Strength of Trunnion MYS6=Minimum SpecifiedYield Strength of Trunnion.At the manufacturers option,as an alternate method for the 80 psig(6 Bar)gas test,the pressure may be applied inside the body cavity with the ball closed and both sides open for in
49、spection.7.2.3 The duration of the seat test shall not be less than shown below.W S size DN i Test Time Seconds 2 and smaller 50 and smaller 2-112-8 65-200 10-18 250-450 20-36 500-900 120 Tme duration is the period of inspection after the valve is fully prepared and under test pressure.7.2.4 There s
50、hall be no visible leakage,as defined by MSS SP-82,past the seat for the duration of the test for valve with resilient (polymeric or elastomeric)seats.3 COPYRIGHT Manufacturers Standardization Society of the Valve and FittingsLicensed by Information Handling ServicesCOPYRIGHT Manufacturers Standardi
