1、 MSS SP-65-2012 High Pressure Chemical Industry Flanges and Threaded Stubs for Use with Lens Gaskets 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 Fa
2、x: (703) 281-6671 E-mail: standardsmss-hq.org www.mss-hq.org MSS MSS STANDARD PRACTICE SP-65 i This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 110 and the MSS Coordinating Committee. The content of this Standard Practice is the resulting efforts of compete
3、nt 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 requirements and is intended as a basis for common practice by the manufacturer, the user, and the general public. The exis
4、tence 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 Practice is established only by reference in other documents such as a code, specification, sales contract, or publi
5、c 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 requirements of this Standard Practice shall not be attributable to MSS and is solely the responsibility of the certifier or
6、 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 applicable to this Standard Practice at the date of approval of this MSS Standard Practice (see Annex B). This Standard
7、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 this Standard Practice, no position is taken with respect to the validity of any potential claim(s) or of any patent
8、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 infringement of such rights are entirely their responsibility. In this Standard Practice, all text, notes, annexes, tab
9、les, 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 appendices, if included, that appear in this document are construed as “supplemental”. Note that supplemental informati
10、on does not include mandatory requirements. Substantive changes in this 2012 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. Non-tolerance Dimens
11、ions in this Standard Practice are nominal, and, unless otherwise specified, shall be considered “for reference only“. Excerpts of this Standard Practice may be quoted with permission. Credit lines should read Extracted from MSS SP-65-2012 with permission of the publisher, Manufacturers Standardizat
12、ion 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 the Manufacturers Standardization Society of the Valve and Fittings Industry Inc. All rights reserved. Origina
13、lly Published: September 1962 Current Edition Approved: September 2011 Current Edition Published: May 2012 MSS is a registered trademark of the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Copyright , 2012 by Manufacturers Standardization Society of the Valve and Fi
14、ttings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-65 ii TABLE OF CONTENTS SECTION PAGE PURPOSE 1 1 SCOPE . 1 2 PRESSURE-TEMPERATURE RATING . 1 3 SIZE . 1 4 MARKING 1 5 MATERIALS 1 6 FACINGS AND GASKETS 2 7 WELDING END PREPARATION . 2 8 THREAD OF SCREWED FLANGES 2 9 TESTS . 2 TABLE 1 G
15、asket Details 2 2 Pressure-Temperature Ratings, psi 3 3 Class 4000, Flange Facing, Gasket, Flange, and Stub Dimensions (Ref. Figure 1) 4 4 Pipe, Tube, and Welding End Dimensions (Ref. Figure 1) . 5 A1 Lowest Pressure-Temperature Ratings for Class 2500 Group #1 and Group #2 Materials ASME B16.5-1981
16、and ASME B16.5-2009 . 6 FIGURE 1 Machining for Facings and Dimensions of Gaskets 5 ANNEX A MSS SP-65 Pressure-Temperature Rating Development Background 6 B Referenced Standards and Applicable Dates . 7 MSS STANDARD PRACTICE SP-65 1 HIGH PRESSURE CHEMICAL INDUSTRY FLANGES AND THREADED STUBS FOR USE W
17、ITH LENS GASKETS PURPOSE Flanges specified in the Standard Practice should be used only with the lens gaskets specified herein. This Standard Practice is similar in intent to ASME B16.5, but governs a higher pressure class and lens gasket connection. At the time of writing this Standard Practice, no
18、 American Standard existed for pipe walls as heavy as required for this pressure class. Such piping is done mostly with seamless steel tubing. However, for purposes of flange and stub standardization, a definite set of outside diameters has been specified. 1. SCOPE This Standard Practice establishes
19、 requirements for cast and forged steel flanges (welding neck and straight threaded) and threaded stubs designed especially for use in the chemical industry with end connections making use of lens gaskets. 2. PRESSURE-TEMPERATURE RATING 2.1 For reference purposes the material covered in this Standar
20、d Practice shall be identified as “4000 SP-65”. Pressure ratings applicable to any of the materials identified in Section 5 are given in Table 2 (U.S. customary units). 2.2 The reference temperature is the metal temperature, and in general, this is the same as the temperature of the contained fluid.
21、 Use of a pressure rating corresponding to a temperature other than that of the contained fluid is the responsibility of the user, subject to the requirements of applicable codes and standards. 3. SIZE The sizing used throughout this Standard Practice is nominal pipe size (NPS). This is based on sta
22、ndard pipe sizes as specified in ASME B36.10M, in so far as the relationship between size and outside diameter is concerned. These flange and stub dimensions have been calculated on the basis of the attached pipe wall tabulation covering a class of pipe which could be called Schedule 500, as shown i
23、n Table 4. It is recognized that most tubing used in this high pressure field will not correspond to these tabulated pipe diameters; however, transition pieces, transitional welds, or “turning down” the pipe should readily permit the use of these standard flanges and stubs. 4. MARKING Flanges shall
24、be marked in accordance with MSS SP-25, except rating designation shall be “4000 SP-65“. 5. MATERIALS 5.1 General This Standard Practice is based on forged and cast steel flange material as produced under various ASTM specifications for pressure piping work. 5.2 Forged and Cast Materials Acceptable
25、flange materials shall be forged or cast Group 1 and Group 2 product forms as listed in Table 1A of ASME B16.5; except the low carbon grades of stainless steel, Material Group 2.3 of Table 1A, shall not be used. The notes of Table 1A, Table 2, and Table II of ASME B16.5 also apply to the applicable
26、listed material. 5.3 Gasket Materials The lens gasket material shall be soft iron, unless limitations of temperature or corrosion resistance require another material be selected. The selected gasket material shall have a chemical composition and corrosion resistance compatible with the flange materi
27、al. See Table 1 for gasket materials and hardness limits. MSS STANDARD PRACTICE SP-65 2 TABLE 1 Gasket Details Gasket Material Maximum Hardness Brinell Rockwell B Scale Soft Iron 90 56 Low Carbon Steel 120 68 5% Cr-1/2% Mo Steel 130 72 Type 410 Steel 170 86 Type 304 Steel 160 83 Type 316 Steel 160 8
28、3 Type 347 Steel 160 83 5.4 Bolting Lens-gasketed flanged joints are dependent upon surface deformation of the solid-metal lens gasket for sealing effectiveness. High strength bolting and adequate assembly bolting torque are important for satisfactory performance. Bolting material should be equal to
29、 ASTM A193/A193M, Grade B7 for ferritic steel flanges. Nuts should be equal to ASTM A194/A194M, Class 2H. For austenitic or special alloy flanges, ASTM A193/A193M, Grade B7 bolting may be used if elevated temperatures are not involved. If elevated temperatures, corrosive environments, or both are in
30、volved, special high strength bolting material should be used. The strength, thermal expansion characteristics, and corrosive resistance of special bolting material should be taken into consideration. 6. FACINGS AND GASKETS The machining for facings and the dimensions of gaskets shall be as shown in
31、 Table 3 and as illustrated in Figure 1. 7. WELDING END PREPARATION Unless otherwise agreed to by the manufacturer and user, the welding end of welding neck flanges and stubs shall be prepared in accordance with ASME B16.25. Dimensions shown in Table 4 shall be used, except in such cases that requir
32、e special dimensions in order to make transition welds to pipe or tubing of other dimensions. 8. THREAD OF SCREWED FLANGES 8.1 The internal thread of ring (hub-less) flanges, and the external thread of pipe of pipe stubs, shall be NPSM straight pipe threads for free fitting mechanical joints, in acc
33、ordance with ASME B1.20.1. 8.2 In order to accommodate the established lens ring gasket at the end of the threaded pipe, it is necessary to increase the O.D. of the pipe used with NPS 2 and smaller threaded flanges. Hence, the thread size for NPS 3/4, 1, and 2 flanges is one size larger than the nom
34、inal size; e.g., the O.D. and thread of NPS 1 is required for the NPS 3/4 flange. The thread and pipe size may be obtained by upsetting the pipe end or by using a stub piece, to affect the transition of line pipe to the proper size flange. 8.3 Since the combined strength of flange bolting can be gre
35、ater than the strength of the flange stub thread, care should be taken in making up the joint. 9. TESTS Flanges and forged steel stubs are not required to be tested. Flanges attached (or integral with) piping, pressure vessels, or other equipment may be hydrostatically tested at 15,000 psi. MSS STAN
36、DARD PRACTICE SP-65 3 TABLE 2 Pressure Temperature Ratings, psi (a)Service Temperature (F) Maximum Pressure -20 to 100 200 300 10,000 9,250 7,950 400 500 600 7,075 6,575 6,250 650 700 750 6,150 6,075 6,000 800 850 5,875 4,000 Hydrostatic Shell Test 15,000 NOTE: (a) See Annex A for background on pres
37、sure-temperature rating development. MSS STANDARD PRACTICE SP-65 4 NominalPipeSize(NPS)6 3.805.754.5321.066.625.818.5015.503.743.569.007.0612.5012 1381.5006.628 6.5856.5037.31NOTES:(1)SeeSection8.(2) SeeSection8.2.5 3.184.943.7621.065.505.007.3114.753.123.197.756.4411.508 1121.6255.568 5.5285.4476.6
38、84 2.554.002.9930.944.384.066.1912.252.502.626.375.129.508 1141.3754.508 4.4664.3855.383 2.053.382.4800.883.623.445.0010.501.922.255.254.818.08 1181.2503.508 3.4673.3865.062121.552.811.9670.882.882.884.129.621.552.004.884.317.508 1 1.1252.888 2.8412.7604.562 1.302.441.7100.812.502.503.628.501.261.69
39、4.124.196.508 7/8 1.0002.388 2.8412.7604.441121.052.001.3680.752.002.062.887.000.981.382.753.384.884 1 1.1251.9011.52.3512.2943.621 0.681.621.0260.751.501.692.005.880.641.252.063.004.004 7/8 1.0001.3211.51.8771.8203.253/4 0.491.120.7700.621.121.191.695.120.481.121.752.883.504 3/4 0.8751.0511.51.2931
40、.2373.12Ref.Figure1 Bg DGMSFR OB tXYB.C.# S.D.B.H.D.AT.P.(1)O.D.(1)P.D.(1)ZGasket I.D.+0.03-0.00O.D. 0.03 Contact Dia.Ref.Thickness0.03 Radius 0.06FlangeBevelO.D. 0.06RaisedFaceO.D. 0.03O.D.0.06Bore0.03Thickness+0.12-0.00Hub.Dia. 0.06 LengththroughHub0.06DrillingBolt CircleDia.0.06No.of StudsStud Di
41、a.Bolt HoleDia.0.016Pipe Diameter(2)PipeorStub Thread Pitch PipeorStub Thread OutsideDia.(max.)PipeorStubThreadPitchDia.(max.)Stub Length 0.06TABLE 3Class4000, FlangeFacing, Gasket, Flange, andStubDimensions(Ref.Figure1)Dimensionsininches.MSS STANDARD PRACTICE SP-65 5 TABLE 4 Pipe, Tube, and Welding
42、 End Dimensions (Ref. Figure 1) Dimensions in Inches. Nominal Pipe Size (NPS) Theoretical Schedule No. Outside Diameter of Pipe A Inside Diameter of Pipe B Wall Thickness T 3/4 1 112500 500 500 1.05 1.32 1.90 0.48 0.64 0.98 0.284 0.339 0.460 2 2123 500 500 500 2.38 2.88 3.50 1.26 1.55 1.92 0.559 0.6
43、63 0.793 4 5 6 500 500 500 4.50 5.56 6.62 2.50 3.12 3.74 1.001 1.223 1.443 FIGURE 1 Machining for Facings and Dimensions of Gaskets MSS STANDARD PRACTICE SP-65 6 ANNEX A MSS SP-65 Pressure-Temperature Rating Development Background The Class 4000 pressure-temperature ratings, as presented in Table 2,
44、 were developed during the period that ASME B16.5-1981 edition was current. The pressure ratings of all Group #1 and Group #2, ASME B16.5-1981, Table 1 materials, except the low carbon grades of stainless steel Material Group 2.3, were considered at each temperature up to 850 F. The ASME B16.5-1981
45、overall lowest pressure rating of all the Group #1 and Group #2 materials at each temperature was considered in the Class 4000 pressure-temperature rating. In this way the Class 4000 pressure-temperature ratings were simplified and standardized at each temperature up to 850 F so that all Group #1 an
46、d Group #2 ASME B16.5-1981 materials could support the pressure-temperature ratings of this Standard Practice. During the 1998 review of this Standard Practice, the Technical Committee checked the pressure-temperature ratings of this Standard Practice against those published for all materials, excep
47、t the low carbon grade of stainless steel Material Group 2.3, in ASME B16.5-1996. The review indicated that the combined lowest pressure-temperature rating of Group #1 and Group #2 materials, versus the ASME B16.5-1981 pressure-temperature ratings did not substantially change, and that the ASME B16.
48、5-1996 edition allowed for even higher pressure ratings at a number of temperatures up to 850 F. With this background, the pressure temperature-ratings table, as originally developed under ASME B16.5-1981, was retained (see Table 2), and its reference to ASME B16.5-1996 pressure-temperature ratings
49、was justified. During the 2007 review, the 1998 review above was updated to include ASME B16.5-2003 data. The Material Groups 2.10 and 2.12 were new materials to the ASME B16.5-2003 edition and were, therefore, not in the ASME B16.5-1996 edition. The MSS Technical Committee noted the slight negative difference in data at the 200 F and 300 F temperatures versus the original ASME B16.5-1981 data caused by the inclusion of Material Groups 2.10 and 2.12 in ASME B16.5-2003 but decided to leave the Table 2 pressure temperature ratings as originally develo
