1、 MSS SP-110-2010 Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends 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-
2、6671 e-mail: infomss-hq.org www.mss-hq.org MSS STANDARD PRACTICE SP-110iThis MSS Standard Practice was developed under the consensus of the MSS Technical Committee 401 and the MSS Coordinating Committee. The content of this Standard Practice is the result of the efforts of competent and concerned vo
3、lunteers to provide an effective, 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 itsel
4、f 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. “Other standards documents referred to herein are identified by the date of iss
5、ue that was applicable to 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. Referen
6、ces contained herein which 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 Sta
7、ndard Practice (See Annex A). In this Standard 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, if included, that appear in this docu
8、ment are construed as “supplemental“. Supplemental information does not include mandatory requirements for this Standard Practice. U.S. customary units in this Standard Practice are the standard; metric (SI) units are for reference only. Substantive changes in this 2010 edition are “flagged” by para
9、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. Non-toleranced dimensions in this Standard Practice are nominal, and, unless otherwise specified, shall be considered “for ref
10、erence only”. Any part of this Standard Practice may be quoted. Credit lines should read Extracted from MSS SP-110- 2010 with permission of the publisher, the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Reproduction prohibited under copyright convention unless writ
11、ten permission is granted by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Originally Approved: May 1992 Copyright , 1992, 1996, 2010 by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-110i
12、iTABLE OF CONTENTS SECTION PAGE 1 SCOPE. . 1 2 PRESSURE-TEMPERATURE RATINGS. . 1 3 MATERIALS. . 2 4 DESIGN. . 2 5 DIMENSIONS 3 6 MARKING 4 7 TESTING 4 TABLE 1 Port Sizes for Ball Valves . 6 2 Shell Test Duration (Visual Test Methods) 7 3 Seat Test Duration 7 FIGURE 1 Examples of Valve Types . 8 2 Ty
13、pical Nomenclature for Ball Valve Parts 9 ANNEX A Referenced Standards and Applicable Dates . 10 MSS STANDARD PRACTICE SP-110iiiMSS 127 Park Street, NE Vienna, VA 22180-4602 703-281-6613 FAX 703-281-6671 www.mss-hq.org e-mail:infomss-hq.org EXECUTIVE DIRECTOR: Robert F. ONeill ERRATA SHEET FOR MSS S
14、P-110-2010 BALL VALVES THREADED, SOCKET-WELDING, SOLDER JOINT, GROOVED AND FLARED ENDS August 23, 2010 Note the following correction: 1. Page 2, Section 3.3, Other Parts. Under “Caution for Users,” the second sentence should read “For guidance, see ASME B31.3, Appendix F.” This Errata Sheet is inclu
15、ded in the Standard Practice. Future printing of the Standard Practice will include this revised data. PRESIDENT: J.V. Ballun Val-Matic Valve not to exceed 20,000 psi. For non-listed bolt materials, the allowable bolt stress shall be taken as 25% of the yield strength, not to exceed 20,000 psi. 4.2.
16、3.2 Threaded bonnet or cover joints shall have a thread shear area that satisfies the following: P(Ag/As) .6Sa where: P = Valve cold working pressure, psig. MSS STANDARD PRACTICE SP-1103Ag = Area bounded by the effective outside periphery of a gasket or O-ring, or other seal effective periphery, exc
17、ept that in the case of a ring-joint, the bounded area is defined by the pitch diameter of the ring, square inches. As = Total effective thread shear area, square inches. Sa = Allowable minimum body/bonnet stress, from ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, not to exceed 20,
18、000 psi. For non-listed materials, the allowable stress shall be the lesser of 25% of the minimum tensile strength, or 67% of the minimum yield strength, not to exceed 20,000 psi. 4.2.4 Valves having flanged body joints which split the valve either perpendicular to or at an angle with the piping are
19、 subject to piping loads. Bolting in these cases shall be such that a direct tensile stress shall not exceed 7/9of the allowable stress listed in ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, not to exceed 20,000 psi. For non-listed bolting materials, the allowable bolt stress shal
20、l be taken as 25% of the yield strength not to exceed 20,000 psi. 4.2.5 Valves of a one-piece end entry type shall be designed so that the body insert is sufficient to withstand the full differential pressure permissible for the valve. 4.2.6 Threaded body joints exposed to piping loads shall satisfy
21、 the following thread shear area requirements: P(Ag/As) .47Sa where: P, Ag, As, and Sa are as defined in Section 4.2.3.2. 4.3 End Connections 4.3.1 Threaded pipe ends shall have taper pipe threads in accordance with ASME B1.20.1. 4.3.2 Socket dimensions of socket welding ends shall be in accordance
22、with ASME B16.11. 4.3.3 Solder cup dimensions of solder joint ends shall be in accordance with ASME B16.18. 4.3.4 Grooved ends shall have groove dimensions in accordance with MIL-P-11087G. 4.3.5 Flared ends shall be in accordance with ASME B16.26. 4.4 Stems 4.4.1 To prevent removal of the stem while
23、 the valve is pressurized, the valve shall be designed so that the stem seal retainer assembly (gland) alone does not retain the stem. 4.4.2 In those cases where service conditions require electrical continuity between the stem and body, the purchaser must so specify. 4.5 Stem Packing 4.5.1 The valv
24、e shall have provisions for adjustment of a gland or packing nut in order to obtain a seal at the stem packing. The exception is for valves with elastomeric stem seals, where adjustment is not possible. 4.6 Position Indication 4.6.1 The valve shall have a positive means of indication of ball port po
25、sition. If the handle is the only means of indication (i.e., valve not equipped with position indication), it shall be designed such that the handle cannot be assembled to indicate other than the position of the ball port. 5. DIMENSIONS 5.1 Valve port diameters for full port, regular port, and reduc
26、ed port are defined in Table 1. All components forming the flow stream shall have an inside diameter no smaller than as indicated. MSS STANDARD PRACTICE SP-11047.1.3 For valves having CWP no greater than 1500 psig, the manufacturer may, as a substitute for the test specified in Section 7.1.1 test ea
27、ch valve using gas at a minimum pressure of 80 psig for a duration of not less than set forth in Table 2. In order to exercise this option, the manufacturer must sample production lots to ASQ Z1.4, Level II, 0.4 AQL using the test specified in Section 7.1.1. 7.1.4 For reduced port, end entry valves
28、having one-piece bodies in nominal pipe sizes 2 and smaller that have a CWP no greater than 2000 psig, the manufacturer may, as a substitute for the test specified in Section 7.1.1 test each valve using gas at a minimum pressure of 80 psig for a duration of not less than set forth in Table 2. In ord
29、er to exercise this option, the manufacturer must sample production lots to ASQ Z1.4, Level II, 0.4 AQL using the test specified in Section 7.1.1. 7.1.5 The ball shall be in such a position during the shell test as to assure full pressurization of the valve shell. 7.1.6 When tested with a liquid, th
30、e valve exterior shall show no visible leakage. When tested with a gas, the valve shall show no visible leakage when immersed in water or coated with a leak detection solution. 7.1.7 Visually detectable leakage through pressure boundary walls is not acceptable. Leakage through adjustable stem packin
31、g during testing shall not be cause for rejection. The stem packing or stem seals shall be capable of retaining pressure at least equal to the rated cold working pressure of the valve without visible leakage. 7.1.8 When volumetric loss testing devices are used the valve manufacturer must be able to
32、demonstrate that leakage sensitivity of the device produces results that are equivalent to those which are acceptable when visual examination methods are employed. 6. MARKING 6.1 Ball valves shall be marked in accordance with MSS SP-25. 6.2 Copper alloy ball valves made with copper alloy components
33、including end pieces or caps, stem, ball (which may be either plated or unplated), and the manufacturers standard seat material for those valves do not need trim marking per Section 7.1.3 of MSS SP-25. 6.3 Copper alloy ball valves manufactured with optional trim components for ball, stem, or seats s
34、hall be marked to indicate the optional ball, stem, or seat per MSS SP-25, or as identified by the manufacturers figure or model number. 7. TESTING 7.1 Shell Test 7.1.1 Each valve, except as noted in Sections 7.1.2 thru 7.1.4, shall be given a shell test, at a pressure of 1.5 times the CWP, and roun
35、ded off to the next higher 25 psi. The test fluid shall be air, gas, water, kerosene, or liquids with a viscosity no greater than that of water. The test fluid temperature shall be below 100F. The duration of the test shall be as set forth in Table 2. 7.1.2 For valves having CWP no greater than 1000
36、 psig, the manufacturer may, as a substitute for the test specified in Section 7.1.1 test each valve using gas at a minimum pressure of 80 psig for a duration of not less than that set forth in Table 2. In order to exercise this option, the manufacturer must be able to certify that a production samp
37、le of the valve model so tested has been subjected to a hydrostatic shell test of at least 2.5 times CWP with no detrimental distortion as evidenced by a subsequent seat test. MSS STANDARD PRACTICE SP-11057.2 Seat Test 7.2.1 Following the shell test, each valve shall be given a closure seat test. At
38、 the manufacturers option, this test may be either a hydrostatic closure test at a pressure no less than 110% of the 100F seat pressure rating or a gas closure test at a minimum pressure of 80 psig. The duration of the test shall be as set forth in Table 3. 7.2.2 The test pressure shall be applied s
39、uccessively on each side of the closed valve. As an alternate method for the 80 psig minimum gas test, the pressure may be applied inside the body cavity with the ball closed and both sides open for inspection. The method of seat leakage testing on each seat shall result in a filled or pressurized c
40、avity between the seats to assure that no seat leakage can escape detection because of gradual and incomplete pressurization or filling of the cavity during the test duration. 7.2.3 Valves marked as one-way valves require a closure test only in the direction of the flow. 7.2.4 There shall be no visi
41、ble leakage past the seat for the duration of the test for valves with resilient (polymeric or elastomeric) seats. 7.2.4.1 The term “no visible leakage” applied to a hydrostatic test liquid is defined as a leak rate that will produce no visible weeping or formation of drops at the test pressure and
42、for the duration of the test. 7.2.4.2 The term “no visible leakage” applied to air or gas testing is defined as a leak rate that will produce no visible formation of bubbles in a water immersion test or after application of a leak detection fluid at the test pressure and for the duration of the test
43、. 7.2.4.3 For automatic leak detection methods, this definition shall be considered equivalent to a leak rate no greater than 4.1x10-5in3/sec (6.7x10-4ml/sec) with a pressure differential of 80 to 100 psig (5.5 to 6.9 bar) for application to valves NPS 8 and smaller. 7.2.5 The maximum allowable leak
44、age rate on each seat of non-resilient seated, except metal-seated, valves for the duration of the test shall be 2/10of a standard cubic foot of gas per hour per inch of nominal valve size, or a maximum of 1.22 cubic inches of hydrostatic media per hour per inch of nominal valve size, at the test pr
45、essure specified in Section 7.2.1. 7.2.6 The maximum allowable leakage rate on each seat of metal-seated valves for the duration of the test shall be 4/10of a standard cubic foot of gas per hour per inch of nominal valve size, or a maximum of 2.44 cubic inches of hydrostatic test media per hour per
46、inch of nominal valve size at the test pressure specified in Section 7.2.1. 7.2.7 When volumetric loss testing devices are used, the valve manufacturer must demonstrate that leakage sensitivity of the device produces results that are equivalent to or better than those which are acceptable when visua
47、l examination methods showing no leakage are employed. 7.3 System Hydrostatic Tests If valves conforming to this Standard Practice are subjected to hydrostatic testing of systems with the valve in the closed position at a pressure greater than the CWP rating, such testing shall be the responsibility
48、 of the user. MSS STANDARD PRACTICE SP-1106TABLE 1 Port Sizes for Ball Valves Valve Size (NPS) Diameter Full Port (1)Inches Regular Port (1)Inches Reduced Port (1)Inches .25 not specified not specified 38.37 not specified not specified .50 .37 .31 .75 .56 .46 1 1.00 .75 .62 1 1.25 .93 .77 1 1.50 1.1
49、2 .93 2 2.00 1.50 1.242 2.50 1.87 1.55 3 3.00 2.25 1.864 4.00 3.00 2.48 Tolerance: Undersize: .06 inches Oversize: No limit specified (1)For pressures in excess of 1500 psig, Annex A of ASME B16.34 may be used for guidance with regard to the minimum inside diameter of full port valves. MSS STANDARD PRACTICE SP-1107TABLE 2 Shell Test Duration (Visual Test Methods) Valve CWP Rating Maximum Shell Test Pressure (minimum) Shell Test Duration: (e)Seconds (minimum) AIR HYDROSTATIC (a)AIR HYDROSTATIC psig psig psig Valve Size (NPS)
