1、I MSS SP-85-2002 Gray Iron Globe&Angle Valves Flanged and Threaded Ends Standard Practice Developed and Approved by b e Manufacturers Standardization Society of the Valve and Fittings Industry,Inc.127 Park Street,NE Vienna,Virginia 221 80(703)281-661 3 COPYRIGHT 2003;Manufacturers Standardization So
2、ciety of the Valve and Fittings Document provided by IHS Licensee=Fluor Corporation/2110503105,User=,05/22/2003 19:40:35 MDT Questions or comments about this message:please callthe Document Policy Management Group at 1-800-451-1584.-,-,-MSS STANDARD PRACTICE SP-85 This MSS Standard Practice was deve
3、loped under the consensus of the MSS Technical Committee 106 and the MSS Coordinating Committee.The content of this Standard Practice is the result ofthe efforts of competent and concerned volunteers to provide an effective,clear,and non-exclusive specification that will benefit the industry as a wh
4、ole.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 manufac-ture,sale,or use of products not conforming to the Standard Practice.Mandatory conformance i
5、s established only by reference in a code,specification,sales contract,or public law,as applicable.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 S
6、P.(See Annex C)In this Standard Practice all notes,annexes,and figures are constnied to be essential to the understand-ing of the message of the standard,and are considered part of the text unless noted as supplemental.All footnotes appearing in this document are construed as supplemental where thei
7、r information does not modiQ the text to which they refer.U.S.customary u n i t s in this SP are the standard;the metric u n i t s are for reference oniy.Non-toleranced dimensions in this Standard Practice are nominal and,unless otherwise specified,shall be considered“for reference only”.I Substanti
8、ve changes in this 2002 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 I edition.Any part o f this standard may be quoted Credit lines shouldread Extractedf
9、iom Ii/trSSP-SS,2002,with permission of the publisher,the Manufacturers Standardization Society.Reproduction prohibited under conright convention unless written permission is granted by the Manufacturers Standarduation Society of the Valve and Fittings Industry,Inc.Originally Approved April 1976 Cop
10、yright Q 1984 by Manufacturers Standardization Society of the Valve and Fittings Industry,Inc.Printed in U.S.A.1 COPYRIGHT 2003;Manufacturers Standardization Society of the Valve and Fittings Document provided by IHS Licensee=Fluor Corporation/2110503105,User=,05/22/2003 19:40:35 MDT Questions or co
11、mments about this message:please callthe Document Policy Management Group at 1-800-451-1584.-,-,-MSS STANDARD PRACTICE SP-85 FOREWARD The 2002 edition of MSS SP-85 changed the title and material identification throughout the standard from cast iron to gray iron.added a Forward.added nominal size des
12、ignation in DN.and deleted construction designations SECTION TABLE OF CONTENTS PAGE SCOPE.1 VALVE TYPES,CLASSES,AND SIZES.1 PRESSURE-TEMPERATURE RATINGS.1 MATERIALS.2 DESIGN.2 WORKMANSHIP.3 TESTS.3 MARKING.4 PAINTING.4 TABLES 1 2 3 B 1 Pressure-Temperature Ratings.Non-Shock.psi.1 Shell Test Pressure
13、.Minimum.4 Test Duration.Seconds.Minimum.4 Pressure-Temperature Ratings.Non-Shock.bar.7 FIGURES 1 Type I.Globe.Metal-To-Metal Seats.5 2 Type11.Angle.Metal-To-Metal Seats.5 3 Type III.Globe.Compostion-To-Metal Seats.6 4 Type IV.Angle.Compostion-To-Metal Seats.6 ANNEX A Valves Types-Figures.5 ANNEX B
14、Pressure-Temperature Ratings Non-Shock.bar.7 ANNEX C Referenced Standards and Applicable Dates.8 ll COPYRIGHT 2003;Manufacturers Standardization Society of the Valve and Fittings Document provided by IHS Licensee=Fluor Corporation/2110503105,User=,05/22/2003 19:40:35 MDT Questions or comments about
15、this message:please callthe Document Policy Management Group at 1-800-451-1584.-,-,-MSS STANDARD PRACTICE SP-85 GRAY IRON GLOBE&ANGLE VALVES,FLANGED AND THREADED ENDS Temperature Class Degrees F 125 1.SCOPE Class 250 1.1 This standard practice covers gray iron globe and angle valves with flanged and
16、 threaded ends.-20 to 250 200 225 250 1.2 These valves are suitable within the sizes and pressure-temperature ratings specified herein for gen-eral purpose service.200 500 190 460 180 440 175 415 1.3 This standard practice also includes,directly or by reference,stipulations or chemical and physi-cal
17、 properties of materiais,and dimensions of end connections in common use.170 165 155 2.VALVE TYPES,CLASSES,AND SIZES 395 375 355 2.1 Vdve Types 145 140 130 125 Type I(Figure 1)Globe,Metal-to-Metal Seats Type II(Figure 2)Angle,Metal-to-Metal Seats Type III(Figure 3)Globe,Composition-to Metal Seats Ty
18、pe IV(Figure 4)Angle,Composition-to-Metal Seats 315 290 2 70 250 Note:The valve sketches,Figures 1 through 4 in Annex A,are for the purpose of illustration and no-menclature only.They do not represent any manufacturers product.2.2 Trims a)AilBronze b)AllIron c)Bronze with Ferrous Stem d)Composition
19、Disc 2.3 Classes 125 250 2.4 Nominal Pipe Sizes I l I a)NPS 2-12(DNSO-300)flanged end b)NPS 2-6(DN50-150)threaded end I 3.PRESSURE-TEMPERATURE RATINGS 3.1 Pressure-temperature ratings for the various classes of valves are shown in Table 1.Metric units(bar)are shown in Table B1 in Annex B.The ratings
20、 specified are for valves with metal-to-metal seating surfaces.Pressure-temperature ratings for valves with non-metallic seat materials must be limited to reflect the physical characteristics of these materiais at each temperature,and may be lower,but in no case higher than values shown in Tables 1
21、and B 1.TABLE 1 Pressure-Temperature Ratings,Non-Shock-psi 275 300 325 350 I 150 I 335 3 75 400 425 450 Note:See Table B 1 for Metric Units 3.2 The temperature shown for the corresponding rat-ing shall be the metal temperature of the pressure re-taining parts.It shall be assumed that the metal tem-p
22、erature will be the temperature of the contained fluid.Use of a pressure rating at a metal temperature other than that of the contained fluid shall be the responsibil-ity of the user.Note:For definition of DN see IS0 6708 or MSS SP-86.1 COPYRIGHT 2003;Manufacturers Standardization Society of the Val
23、ve and Fittings Document provided by IHS Licensee=Fluor Corporation/2110503105,User=,05/22/2003 19:40:35 MDT Questions or comments about this message:please callthe Document Policy Management Group at 1-800-451-1584.-,-,-MSS STANDARD PRACTICE SP-85 4.MATERIALS 4.1 Genmzl This Standard Practice is in
24、tended to cover minimum physical and chemical requirements.Materials of superior properties may be substituted.Users are cautioned against applications with fluids which may react chemically with any materials used in these valves.Consultation with the manufacturer is advised to determine suitabilit
25、y in cases of doubt.4.2 Body and Bonnet Body and bonnet shall be gray iron in accordance with ASTM A 126,Class B.4.3 Seating Material Metal-to-Metal surfaces shall be brass or bronze for bronze mounted valves;gray iron or other ferrous material for all iron valves.Composition or resilient facing mat
26、erial shall be rub-ber(synthetic or natural),or suitable polymer.Other seating materiais,either metal or composition,suit-able for the intended service may be furnished when agreed between purchaser and manufacturer.4.4 Stems Stem material shall be brass or bronze,either cast or wrought,for bronze m
27、ounted and com-position disc valves,wrought steel for all iron valves.4.5 Handwheels Handwheels may be gray iron,ductile iron,malleable iron or steel at the manufacturers option.4.6 Bolting Bolts and studs connecting pressure containing parts shall develop physical strengths not less than requiremen
28、ts of ASTM A 307.4.7 Glands Glands shall be made from brass,bronze,gray iron,or other ferrous materials.5.DESIGN such as to provide against any permanent distortion of the body,bonnet,or seats.Valve stems shall be designed to prevent permanent distortion when valve is operated at full rated working
29、pressure.5.2 End Flanges 5.2.1 End flanges shall be integral with the valve body.Dimensions,tolerances and drilling shall be in accordance with ASME B 1.1 for each respective pres-sure class.The flanges shall be fully machined on the gasket face in accordance with MSS SP-6.5.2.2 Face-to-Face dimensi
30、ons of flanged end valves shall be in accordance with ASME B 16.1 O.5.3 ThreadedEnh Threaded end bodies may have hexagon,octagon or round ends with ribs.Pipe ends shall be threaded with tapered pipe threads in accor-dance with ANSUASME B 1.20.1.5.4 Body-Bonnet Bolting 5.4.1 Dimensions of bolts and c
31、ap screws shall be in accordance with ASME B 18.2.1;nut dimensions in accordance with ASME B18.2.2.5.4.2 ASME B 1.1,Coarse thread series,Class 2B.Nuts shall be threaded in accordance with 5.4.3 Bolts,studs,or cap screws shall be threaded in accordance with ASME B 1.1,Coarse thread se-ries,Class 2A.5
32、.5 Disc Guides Discs and disc holders for valves size 4 and larger shall be guided to ensure that the seating surfaces of the disc and body seat are prop-erly aligned at the point of closure.5.1 General When under the test pressure speci-fied in Paragraph 7,the design of all valves shall be 2 COPYRI
33、GHT 2003;Manufacturers Standardization Society of the Valve and Fittings Document provided by IHS Licensee=Fluor Corporation/2110503105,User=,05/22/2003 19:40:35 MDT Questions or comments about this message:please callthe Document Policy Management Group at 1-800-451-1584.-,-,-MSS STANDARD PRACTICE
34、SP-85 5.6 Seating Surfaces 5.6.1 Disc seating surfaces may be integral or may be separate rings securely fastened to the disc.5.6.2 Body seats shall be separate rings,threaded into the body either shoulder or bottom seated,ex-cept that all iron valve seats may be integral with the body casting at th
35、e manufacturer?s option.5.7 Glands 5.7.1 Glands may be threaded or bolted type.5.7.2 Bolted glands may be solid,solid-bushed,or two piece self-aligning design.Use of open bolt slots in glands shall not be permitted unless hinge bolts are used.5.7.3 Stem seals not requiring a gland but suitable for t
36、he service conditions,may be furnished.5.8 Gland Bolting Studs,stud bolts,hinge bolts,or headed bolts through drilled or slotted holes in the stuffing box flange may be used.In all cases gland bolting shall be securely held in place and shall pro-vide adequate adjustment for progressive compres-sion
37、 of packing material.5.9 Backseat Valves shall be designed to have a backseat.Repacking under pressure is hazardous and is not recommended.5.10 Discs and Disc Holder Disc or disc holders shall be securely attached to the end of the stems in a manner that permits the disc to swivel relative to the st
38、em.5.11 Stems The upper ends of stems shall be threaded with single or multiple Acme type or 60 degree thread approximating the stub form.5.12 Handwheels Handwheels shall be of the spoke type only.Webbed or disc type are not permit-ted.Handwheels shall be marked with the direction of movement for op
39、ening of the valve.On large size valves to be used at or near maximum rated pres-sures,the manufacturer should be consulted regard-ing the use of auxiliary operating means.5.13 BypassandDran Connectons When speci-fied,bypass and drain connections shall be in accor-dance with MSS SP-45.6.WORKMANSHIP
40、6.1 Valve parts shall be designed and manufactur-ing tolerances set so as to provide interchangeability in the product of any one manufacturer between units of the same size,class,type,and design,except the individual fit of the disc to seat ring seating surfaces of Type I and II valves.6.2 Castings
41、 All castings shall be clean and sound,without defects which will impair their service.No plugging,impregnation,welding,or repairing of such defects will be allowed.7:TESTS 7.1 General Pressure tests shall be made on all completed valves prior to shipment by the manufac-turer.7.2 Shell Test Valves i
42、n the partially open posi-tion with both ends closed shall be subjected to hy-drostatic or gas test pressure specified in Table 2.No visible leakage is permitted through the pressure boundary walls or body-bonnet joint.Leakage through the stem packing or stem seals shall not be cause for rejection.T
43、est pressure shall be held for periods specified in Table 3.Caution:Safety precautions must be taken when gas is used.3 COPYRIGHT 2003;Manufacturers Standardization Society of the Valve and Fittings Document provided by IHS Licensee=Fluor Corporation/2110503105,User=,05/22/2003 19:40:35 MDT Question
44、s or comments about this message:please callthe Document Policy Management Group at 1-800-451-1584.-,-,-MSS STANDARD PRACTICE SP-85 2-8 10-12 TABLE 2 Shell Test Pressure,Minimum 30 30 50-200 60 60 250-300 I I I Max.Service Rating 150F(65C)Test Pressure 200 13.8 350 24.1 34.5 60.3 7.3 Hydrostatc Seat
45、 Test Valves shall be sub-jected to a hydrostatic seat test pressure at not less than the maximum service pressure for which the valve is rated.The test pressure shall be applied under the closed disc and the opposite side checked for leak-age.The maximum permissible leakage rate shall be 1 O millil
46、itres per hour,per NPS.Test pressure shall be held for periods specified in Table 3.7.4 Gus Seat Test At the manufacturers option a gas seat test of not less than 80 psi(5.5 bar)may be used in lieu of Hydrostatic Seat Test(7.3).This gas pressure is to be applied as specified for hydrostatic seat tes
47、t.The maximum permissible leakage rate shall be Moth of a standard cubic foot(3 litres)of gas per hour,per NPS.Test pressure shall be held for periods specified in Table 3.I TABLE 3 Test Duration,Seconds,Minimum I I NPS I ShellTest I SeatTest I DN I Caution:Safety precautions must be taken when gas
48、is used.8.MARKING Marking shall conform to MSS SP-25.9.PAINTING The painting of finished valves shall be optional with the manufacturer unless otherwise specified.4 COPYRIGHT 2003;Manufacturers Standardization Society of the Valve and Fittings Document provided by IHS Licensee=Fluor Corporation/2110
49、503105,User=,05/22/2003 19:40:35 MDT Questions or comments about this message:please callthe Document Policy Management Group at 1-800-451-1584.-,-,-MSS STANDARD PRACTICE SP-85 ANNEX A Type I Globe,Metal-to-Metal Seats FIGURE 1 TYPES I and II Part Names 1-Body 2-Bonnet Gasket 3-Bonnet Stud 4-Bonnet
50、Stud Nut 5-Disc 8-Disc Nut 9-Handwheel 10-Handwheel Nut Type II Angle,Metal-to-Metal Seats FIGURE 2 1 1-Packing or Stem Seals 12-Gland 13-Gland Flange 16-Backseat Bushing(Manufacturers Option)17-Seat Ring 18-Stem 19-Bonnet 20-Stem Nut 5 COPYRIGHT 2003;Manufacturers Standardization Society of the Val
