1、MSS SP-146-2014 High Pressure, Lug- and Wafer-Type, Iron and Ductile Iron Knife Gate Valves 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) 281-6613 Fax: (703)
2、281-6671 E-mail: standardsmss-hq.org www.mss-hq.org MSS STANDARD PRACTICE SP-146i This MSS Standard Practice was developed under the consensus of the MSS Technical Committees 114, 106, 409, and the MSS Coordinating Committee. Maintenance and future review of this Standard Practice will be conducted
3、by MSS Technical Committees 409 and 106. The content of this Standard Practice is the resulting efforts 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 requireme
4、nts and 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 to this Standard Pr
5、actice is established only by reference in other documents such as a code, specification, sales contract, 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 requiremen
6、ts of this Standard Practice shall not be attributable to MSS and is solely the responsibility of the 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 applic
7、able to this Standard Practice at the date of approval of this MSS Standard Practice (see Annex A). This Standard Practice 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 thi
8、s Standard Practice, no position is taken with respect to the validity of any potential claim(s) or of any patent rights 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 infri
9、ngement of such rights are entirely their responsibility. In this Standard Practice, all text, notes, annexes, tables, 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 appen
10、dices, if included, that appear in this document are construed as “supplemental”. Note that supplemental information does not include mandatory requirements. The SI (metric) units and U.S. customary units in this Standard Practice are regarded separately as the standard; each should be used independ
11、ently of the other. Combining or converting values between the two systems may result in non-conformance with this Standard Practice. Non-toleranced dimensions in this Standard Practice are nominal unless otherwise specified. Excerpts of this Standard Practice may be quoted with permission. Credit l
12、ines should read Extracted from MSS SP-146-2014 with permission of the publisher, Manufacturers Standardization Society of the Valve and Fittings Industry. Reproduction and/or electronic transmission or dissemination is prohibited under copyright convention unless written permission is granted by th
13、e Manufacturers Standardization Society of the Valve and Fittings Industry Inc. All rights reserved. Originally Approved: November 2013 Originally Published: March 2014 MSS is a registered trademark of Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Copyright , 2014 by
14、 Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-146ii TABLE OF CONTENTS SECTION PAGE 1 SCOPE 1 2 STANDARD UNITS 1 3 PRESSURE-TEMPERATURE RATINGS . 1 4 SIZE 1 5 MARKING 1 6 MATERIALS 2 7 DESIGN 2 8 WELDING 2 9 TOLERANCES . 3 1
15、0 PRODUCTION TEST . 3 11 SHIPPING INFORMATION 3 12 INSTALLATION 3 TABLE 1 ASME Class 125 and 150 Valve Dimensions, Inches . 4 2 ASME Class 125 and 150 Valve Dimensions, Millimeters . 5 3 ASME Class 250 and 300 Valve Dimensions, Inches . 6 4 ASME Class 250 and 300 Valve Dimensions, Millimeters . 7 AN
16、NEX A Referenced Standards and Applicable Dates 8 MSS STANDARD PRACTICE SP-1461 1. SCOPE 1.1 This Standard Practice covers the construction requirements for high pressure, lug- and wafer-type, iron and ductile iron knife gate valves. 1.2 This Standard Practice covers flanged body designs compatible
17、with ASME B16.1, Class 125 flanges for sizes NPS 2 (DN 50) through NPS 60 (DN 1500), ASME B16.1 Class 250 flanges for sizes NPS 2 (DN 50) through NPS 48 (DN 1200), and ASME B16.42 Class 150 and 300 flanges for sizes NPS 2 (DN 50) through NPS 24 (DN 600). 2. STANDARD UNITS The values stated in either
18、 U.S. customary units or (SI) metric units are to be regarded separately as the standard. Within the text, the (SI) metric units are shown in parenthesis. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from
19、 the two systems may result in non-conformance with this Standard Practice. 3. PRESSURE-TEMPERATURE RATINGS 3.1 This Standard Practice is limited to valves with Class 125 and 250 pressure-temperature ratings, per Table 1 in ASME B16.1, and Class 150 and 300 pressure-temperature ratings, per Table 1
20、in ASME B16.42. 3.2 Valves made from unlisted materials or not meeting the wall thickness requirements may be pressure-temperature rated by the manufacturer in accordance with proof pressure test data requirements of UG-101 of ASME Boiler and Pressure Vessel Code, Section VIII. The manufacturers rat
21、ing shall not exceed the applicable standard flanged valve rating of ASME B16.1 or B16.42 for the applicable body material. 4. SIZE The valve sizes in Tables 1, 2, 3, and 4 are equal to the nominal sizes of the end connections. 5. MARKING Valves shall be marked in accordance with MSS SP-25, and in a
22、ccordance with the following requirements and modifications: a) Manufacturers name or trademark/logo. b) The body material of construction or code. When more than one material or grade of material is used, each shall be identified. When lining in contact with the fluid is used, it shall be listed an
23、d identified as “lining”. c) For valves manufactured for closure in one direction only, the valve shall be marked showing the “seat side” (downstream side) of the valve in such a manner that the markings can be seen with the valve installed in the pipeline. The user shall be responsible for correct
24、directional installation. Bi-directional closure valves need no closure direction marking. d) A tag is to be attached to the valves for installation purposes, indicating: 1) Care to be taken in valve installation with respect to direction of closure; 2) Care to be taken when installing studs or bolt
25、s in the tapped holes of the flange in the area of the chest, to prevent chest damage. The chest is the body area between the packing chamber and the flanges; 3) Packing nuts may require adjustment to obtain a tight seal. e) The stem material need not be listed. HIGH PRESSURE, LUG- AND WAFER-TYPE, I
26、RON AND DUCTILE IRON KNIFE GATE VALVES MSS STANDARD PRACTICE SP-1462 6. MATERIALS 6.1 Valves shall be iron or ductile iron. Materials shall be in accordance with the requirements for materials listed in ASME B16.1 and ASME B16.42. Unlisted materials may be used by agreement between purchaser and man
27、ufacturer. For steel or alloy steel, see MSS SP-135. 6.2 Internal part materials shall have a corrosion resistance equivalent to or better than the valve body. 7. DESIGN 7.1 The design of all valves shall prevent permanent distortion of the body or seats when tested, as specified in Section 10. 7.2
28、Threaded holes used for flange bolting shall provide for full thread engagement to a depth of not less than the nominal bolt diameter. Unless otherwise specified by the customer, threaded holes for flange bolting shall be tapped in accordance with Table 1, 2, 3, or 4 of this Standard Practice. 7.3 T
29、he valve port minimum flow diameter shall be equal to the ASME B16.1 or ASME B16.42 fitting inside diameter, applicable to Pressure Class and Size. For NPS not listed in ASME B16.1 or ASME B16.42, the following shall be used: 7.4 Because of variations in basic valve design, differential pressure, an
30、d valve accessibility, it is not possible to standardize the conditions under which a manually operated valve requires mechanical assistance. Consideration should be given to the use of mechanical assistance on all valves where the differential pressure, when operating, approaches the valves rated w
31、orking pressure. In addition, consideration should be given to the use of mechanical assistance on all NPS 12 (DN 300) valves and larger, regardless of differential pressure. 7.5 Body Wall Thickness 7.5.1 All valves shall have minimum wall thickness as required by ASME B16.1 and ASME B16.42 of the a
32、ppropriate Size and Pressure Class for the rating marked on the identification plate. For NPS not listed in ASME B16.1 or B16.42, the following minimum wall thickness shall be used for listed materials: 7.5.2 As an alternative to Section 7.5.1, valve assemblies with valve bodies not meeting material
33、 requirements or wall thickness for the appropriate Class of ASME B16.1 or B16.42 shall have the maximum allowable pressure determined using a pressure vessel proof test in accordance with UG-101 of ASME Boiler and Pressure Vessel Code Section VIII (see Section 3.2). Documentation records of success
34、ful proof test data shall be available at the manufacturers facility for inspection by the purchaser. 7.6 Bonnets, when required, shall be of the bolted design. 7.7 Dimensions shall be in accordance with Table 1, 2, 3, or 4. 8. WELDING 8.1 No welding allowed. Size Class 125/150 Class 250/300 NPS (DN
35、) in. mm in. mm 36 (900) B16.1 B16.1 35 889 42 (1100) B16.1 B16.1 41 1041 48 (1200) B16.1 B16.1 47 1194 54 (1400) 53 1346 60 (1500) 59 1499 Size Class 125/150 Class 250/300 NPS (DN) in. mm in. mm 36 (900) B16.1 B16.1 2.38 60 42 (1100) B16.1 B16.1 2.75 70 48 (1200) B16.1 B16.1 3.12 79 54 (1400) 2.19
36、55 60 (1500) 2.38 60 MSS STANDARD PRACTICE SP-1463 9. TOLERANCES The following tolerances shall be followed: Face-to-face: NPS 10 (DN 250) and smaller: +0.06 in. (+1.6 mm) NPS 12 (DN 300) and larger: +0.12 in. (+3.2 mm) Bolt circle diameter drilling: +0.06 in. (+1.6 mm) Center-to-center of adjacent
37、bolt holes: +0.03 in. (+0.8 mm) 10. PRODUCTION TEST 10.1 Shell Test Each valve shall be hydrostatically pressure tested in accordance with Section 4 of MSS SP-61. 10.2 Seat Test Each valve shall be seat tested in accordance with MSS SP-61. Maximum permissible leakage for metal seated valves shall be
38、 1.3 oz/min/NPS (40 ml/min/NPS). Resilient seated valves shall have no visible leakage for the duration of the seat test. 11. SHIPPING INFORMATION 11.1 Valve packing nuts may be loosened prior to shipment to extend packing life. These nuts may have to be adjusted after installation. 11.2 If packing
39、nuts are loosened for shipment, there must be a tag attached indicating they have been loosened and include the proper procedure for tightening at installation. 11.3 Unless indicated otherwise, valves shall be shipped with covers to protect the raised faces of the flanges. 12. INSTALLATION 12.1 When
40、 bolting cast iron valves to steel flanges, recommendations in Section 5.3.5 of ASME B16.5 and Section 9.5 of MSS SP-44 should be considered so as to prevent damage to the valve. 12.2 Valve packing will need to be adjusted when the valve is installed to prevent packing leakage. MSS STANDARD PRACTICE
41、 SP-1464 Long Pattern (Face-to-Face) 2.75 4.00 4.12 2.50 2.88 3.12 3.25 3.62 3.75 4.12 4.50 5.00 8.25 9.84 12.00 16.50 16.50 Short Pattern (Face-to-Face)2.00 2.00 2.00 2.25 2.75 2.75 3.00 3.00 3.50 3.50 4.50 4.50 7.38 8.88 9.75 11.50 12.50 15.00 Flanges Thickness Minimum (Includes 0.06 in. Raised Fa
42、ce) 0.75 0.94 0.94 1.00 1.12 1.19 1.25 1.38 1.44 1.56 1.69 1.88 2.12 2.38 2.62 2.75 3.00 3.12 Bolting Clearance Hole Diameter(a)0.75 0.75 0.75 0.88 0.88 1.00 1.00 1.12 1.12 1.25 1.25 1.38 1.38 1.62 1.62 1.62 2.00 2.00 Tap Size(b)5/8-11 5/8-11 5/8-11 3/4-10 3/4-10 7/8-9 7/8-9 1-8 1-8 11/8-7 11/8-7 1-
43、7 1-7 1-6 1-6 1-6 1-5 1-5 Quantity(a)4 4 8 8 8 12 12 12 16 16 20 20 28 32 36 44 44 52 Bolt Circle Diameter 4.75 6.00 7.50 9.50 11.75 14.25 17.00 18.75 21.25 22.75 25.00 29.50 36.00 42.75 49.50 56.00 62.75 69.25 Raised Face Outside Diameter(a)3.62 5.00 6.19 8.50 10.62 12.75 15.00 16.25 18.50 21.00 23
44、.00 27.25 Outside Diameter 6.00 7.50 9.00 11.00 13.50 16.00 19.00 21.00 23.50 25.00 27.50 32.00 38.75 46.00 53.00 59.50 66.25 73.00 Valve Size (NPS)2 3 4 6 8 10 12 14 16 18 20 24 30 36 42 48 54 60 TABLE 1 ASME Class 125 and 150 Valve Dimensions, InchesNOTES: (a) In conformance with ASME B16.1, Class
45、 125 (Class 125 does not have a raised face) and ASME B16.42, Class 150 (NPS 24). (b)Eight-thread series (8-UN) may be used for bolting greaterthan one inch, as recommendedby ASME B16.42 for Ductile Iron Class 150 flanges. MSS STANDARD PRACTICE SP-1465 NOTES: (a) In conformance with ASME B16.1, Clas
46、s 125 (Class 125 does not have a raised face) and ASME B16.42, Class 150 (DN 600). (b)Eight-thread series (8-UN) may be used for bolting greaterthan one inch, as recommendedby ASME B16.42 for Ductile Iron Class 150 flanges. TABLE 2 ASME Class 125 and 150 Valve Dimensions, MillimetersLong Pattern (Fa
47、ce-to-Face) 69.8 101.6 104.6 63.5 73.2 79.2 82.6 91.9 95.2 104.6 114.3 127.0 209.6 249.9 304.8 419.1 419.1 Short Pattern (Face-to-Face)50.8 50.8 50.8 57.2 69.8 69.8 76.2 76.2 88.9 88.9 114.3 114.3 187.4 225.6 247.6 292.1 317.5 381.0 Flanges Thickness Minimum (Includes 1.6 mm Raised Face) 19 24 24 25
48、 29 30 32 35 36 40 43 48 54 61 67 70 76 79 Bolting Clearance Hole Diameter(a)(non-metric)0.75 0.75 0.75 0.88 0.88 1.00 1.00 1.12 1.12 1.25 1.25 1.38 1.38 1.62 1.62 1.62 2.00 2.00 Tap Size(b) (non-metric)5/8-11 5/8-11 5/8-11 3/4-10 3/4-10 7/8-9 7/8-9 1-8 1-8 11/8-7 11/8-7 1-7 1-7 1-6 1-6 1-6 1-5 1-5
49、Quantity(a)4 4 8 8 8 12 12 12 16 16 20 20 28 32 36 44 44 52 Bolt Circle Diameter 121 152 191 241 299 362 432 476 540 578 635 749 914 1086 1257 1422 1594 1759 Raised Face Outside Diameter(a)92 127 157 216 270 324 381 413 470 533 584 692 Outside Diameter 150 190 230 280 345 405 485 535 595 635 700 815 985 1170 1345 1510 1685 1855 Valve Size (DN)50 80 100 150 200 250 300 350 400 450 500 600 750 900 1100 1200 1400 1500 MSS STANDARD PRACTICE SP-1466 NOTES: (a) In conformance with ASME B16.1, Class 250, Table I
