1、 MSS SP-105-2010 Instrument Valves for Code Applications 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) 281-6671 e-mail: infomss-hq.org www.mss-
2、hq.org MSS STANDARD PRACTICE SP-105i This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 115 and the MSS Coordinating Committee. The content of this Standard Practice is the result of the efforts of competent and concerned volunteers to provide an effective, c
3、lear, 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 itself preclude the manufacture, sale, o
4、r 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. “Unless otherwise specifically noted in this MSS Standard Practice, other standards referred to herein are identif
5、ied by the date of issue 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
6、 have changed. References contained herein which are bibliographic in nature are noted as supplemental in the text.” Substantive changes in this 2010 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
7、 material flagged with that in the previous edition. Any part of this Standard Practice may be quoted. Credit lines should read Extracted from MSS SP-105-2010 with permission of the publisher, Manufacturers Standardization Society of the Valves and Fittings Industry, Inc. Reproduction is prohibited
8、under copyright convention unless written permission is granted by Manufacturers Standardization Society of the Valve and Fittings Industry Inc. Originally Approved: July 1990 Originally Published: October 1990 Current Edition Approved: May 2010 Current Edition Published: September 2010 Copyright ,
9、1990, 1996, 2010 by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-105ii TABLE OF CONTENTS SECTION PAGE 1 SCOPE . 1 2 DEFINITIONS 1 3 MATERIALS 1 4 DESIGN REQUIREMENTS . 2 5 QUALIFICATION 3 6 ACCEPTANCE TESTING . 5 7 MARKING
10、5 FIGURE 1 Direct Mounted Instrument Manifold Gasket Groove and Flange Details 4 ANNEX A Referenced Standards and Applicable Dates . 6 MSS STANDARD PRACTICE SP-1051 1. SCOPE 1.1 This Standard Practice applies to small valves and manifold valves developed for and predominately used in instrument, con
11、trol, and sampling piping systems. It covers steel and alloy valves of nominal pipe size (NPS) 1 and smaller, and pressure ratings of 15,000 psi and lower at 100F. 1.2 This Standard Practice applies to instrument valve designs including, but not limited to, needle valves, packless valves, ball valve
12、s, plug valves, check valves and manifold valves. Instrument valves are generally of proprietary design; this Standard Practice is not intended to define or limit designs, construction, performance, envelope dimensions, or valve types. 1.3 The application of valve type, size, rating, materials of co
13、nstruction, and suitability for the service are the responsibility of the purchaser and are outside the scope of this Standard Practice. 2. DEFINITIONS 2.1 General Definitions given in MSS SP-96 apply to this Standard Practice. 2.2 Instrument Valves Valves designed for use in instrument, control, an
14、d sampling piping systems, (e.g., see ASME B31.1, Article 122.3). 2.3 Instrument Piping Piping used to connect instruments to main piping or other instruments. 2.4 Control Piping Piping used to interconnect pneumatically or hydraulically operated control apparatuses, or to signal control systems. 2.
15、5 Sampling Piping Piping used for the collection of samples (such as steam, water, oil, gas, and chemicals) from process systems. 2.6 Manifold Valve Two or more instrument valves fabricated into a single valve body. 2.7 Cold Working Pressure Rating The maximum allowable working pressure of a valve a
16、t ambient conditions (-20F to 100F), abbreviated CWP. 2.8 Pressure Boundary Parts The following items are defined to be pressure boundary parts. Each item may not apply to all valve designs. a) Body b) Bonnet c) Union Nut d) Body to Bonnet Bolting e) Body Bolting 2.9 Packless Valve A valve with a di
17、aphragm or bellows stem seal instead of a packing or O-ring seal at the stem. 3. MATERIALS 3.1 General The pressure boundary parts of the valve shall be made of the materials specified herein. 3.2. Non-pressure boundary parts (such as the stem, glands, packing nut) shall be made of materials compati
18、ble with the pressure boundary parts materials. For compression packing systems, see MSS SP-132. 3.3 The following materials are acceptable for use as pressure boundary parts. a) Materials listed in ASME B16.34 b) Materials listed in ASME B31.1 c) Materials listed in ASME B31.3 d) Materials listed i
19、n ASME Boiler and Pressure Vessel Code, Section III e) Materials listed in ASME B31.12 INSTRUMENT VALVES FOR CODE APPLICATIONS MSS STANDARD PRACTICE SP-1052 3.4 Certified material test reports shall be obtained for pressure boundary parts materials. Certifications shall include chemical analysis and
20、 mechanical properties. 4. DESIGN REQUIREMENTS 4.1 Valves designed in accordance with this Standard Practice shall have their working pressure established by calculation, hydrostatic proof and burst tests or both as specified in Section 5. 4.1.1 Qualification of valves designed to Section 4.1 shall
21、be conducted on each design and size of valve to establish the CWP rating. 4.1.2 The CWP rating of valves of identical design and size but made of different materials shall be proportional to the allowable stress of each material or may be determined by hydrostatic qualification tests on valves made
22、 of each material, at the manufacturers option. 4.1.3 The CWP rating of valves of identical design and size but with different end connections shall be determined by the rating of the valve or the end connection, whichever is less. 4.1.4 The CWP rating of a valve design may be established by the man
23、ufacturer at a value lower than the rating allowed by the qualification tests of Section 5. In that case the lower pressure rating may be established for a valve design and size, regardless of materials or end connections. Such reduced ratings are usually dictated by performance limitations such as
24、operating torque, cycle life, or non-metallic component limitations. 4.1.5 Packing nut adjustment may be necessary to compensate for temperature change. 4.1.6 The manufacturer shall provide pressure ratings for temperatures above 100F. This temperature is the temperature of the pressure containing s
25、hell of the component. In general, this temperature is the same as that of the contained fluid. 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 regulations. 4.2 End c
26、onnections 4.2.1 Pipe Threads Tapered pipe threads shall be in accordance with one of the following: a) ASME B1.20.1 b) ASME B1.20.3 c) CGA V-l 4.2.2 Pipe Socket Weld Connections The socket bore diameter and the depth of socket shall be in accordance with the dimensions and tolerances of ASME B16.11
27、. 4.2.3 Tube socket weld dimensions shall be in accordance with the manufacturers standard. 4.2.4 Butt weld connections for pipe shall have an end preparation in accordance with ASME B16.25. 4.2.5 Butt weld connections for tube shall be in accordance with the manufacturers standard. 4.2.6 Pipe or tu
28、be stub extension end connections may be socket welded or butt welded to the valve. The diameter and wall thickness shall be the manufacturers standard. The standard stub extension lengths are 3” or 6”, measured from the end of the valve. 4.2.7 Mechanical tube fittings shall be in accordance with th
29、e manufacturers design. Fittings may be machined integral with, welded to, or threaded to the valve body. 4.2.8 Weld qualifications for end connections welded to the valve body shall be in accordance with ASME Boiler and Pressure Vessel Code, Section IX. 4.2.9 Other end connections not listed herein
30、 may be provided as agreed upon by the manufacturer and purchaser. MSS STANDARD PRACTICE SP-1053 4.3 Direct Mounted Instrument Manifold Gasket Groove and Flange Details The standard groove for gaskets and minimum flange or plate thickness shall be per Figure 1. Other groove dimensions shall be consi
31、dered special. 5. QUALIFICATION 5.1 General Valve designs shall be qualified by calculation and hydrostatic proof or hydrostatic proof and burst tests at the option of the manufacturer. 5.2 Documentation 5.2.1 Hydrostatic proof and burst tests shall be conducted in accordance with the manufacturers
32、written procedure. Copies of the test procedure and test reports shall be kept on file by the manufacturer. 5.2.2 Stress and pressure rating calculations shall be in accordance with the methods in this Standard Practice. Copies of the calculations shall be kept on file by the manufacturer. 5.3 Test
33、Valves Valves shall have their ratings confirmed by testing three (3) production valves by the method described in Section 5.5. 5.3.1 Similar valves of the same size and design, but having minor modifications, may also be considered qualified. Where those modifications would increase the level of st
34、ress in pressure boundary parts, the rating must be reduced proportionately to the ratio of the stresses. Stresses are to be calculated as specified in Section 5.8. If the materials have different strengths, the ratio of material allowable stresses shall also be used to determine the new rating. 5.4
35、 Material Properties The actual tensile and yield strength of the pressure boundary parts of the test specimens shall be obtained from heat traceable material certifications or by submitting sample material from the same lot to testing in accordance with the procedures of the ASME Boiler and Pressur
36、e Vessel Code, Section VIII, Article UG-101 (J). 5.5 Proof Test Procedure 5.5.1 Each test valve shall pass a hydrostatic proof test in accordance with the following minimum requirements: a) Fluid: Water or hydraulic oil b) Temperature: 50F to 125F c) Pressure: Two times the CWP rating d) Time: One m
37、inute, minimum, at proof pressure e) Position: Placed in all positions capable of subjecting pressure boundary components to internal pressure. 5.5.2 There shall be no visible leakage during the proof test at any pressure containing part, joint, or seal. 5.5.3 The stem packing may be adjusted during
38、 the proof test to stop leakage. No other adjustments are permitted on any other pressure boundary joints or seals. 5.6 Burst Test Procedure 5.6.1 Each test valve shall be hydrostatically shell tested to failure by rupture. The hydrostatic pressure at which rupture occurs shall be recorded. The same
39、 valves used for the proof test shall be used for the burst test. 5.6.2 Leakage is permitted at the valve packing, gaskets, and pressure retaining joints during the burst test, at pressures above the proof pressure. 5.6.3 If the hydrostatic test is stopped before rupture occurs, the highest sustaine
40、d pressure attained shall be considered the burst pressure for that valve. MSS STANDARD PRACTICE SP-1054 GENERAL NOTE: Dimensions are in inches. FIGURE 1 Direct Mounted Instrument Manifold Gasket Groove and Flange Details MSS STANDARD PRACTICE SP-1055 5.7 Pressure Rating Determination When determine
41、d by the method of Section 5.6, the CWP rating shall be less than or equal to the pressure determined from the burst pressure as follows: P 0.25 B Tm/TaWhere: P = CWP Rating B = The lowest burst test pressure recorded for the three specimens tested Ta = Actual tensile strength of the test specimen T
42、m = Specified minimum tensile strength of the material 5.8 Calculations 5.8.1 Stress calculations shall be in accordance with ASME B31.1, ASME B31.3, or ASME Boiler and Pressure Vessel Code, Section III, whichever is applicable. 5.8.1.1 No allowance for corrosion need be taken unless required by the
43、 user. Where corrosion will be present the manufacturer and user may agree to rate the valve based on the anticipated corrosion rate and required length of service. The user is responsible for monitoring the condition of the valves pressure boundary walls. 5.8.2 Allowable stresses shall be in accord
44、ance with the Maximum Allowable Stress Tables in ASME B31.1, ASME B31.3, or ASME Boiler and Pressure Vessel Code, Section III, whichever is applicable. 5.8.3 The working pressure at a temperature other than the CWP is calculated by multiplying the CWP by the ratio of the allowable stress at the new
45、temperature divided by the allowable stress at the CWP, although as stated in Section 4.1.4, performance limitations may further restrict the working pressure at any given temperature. 6. ACCEPTANCE TESTING 6.1 Each production valve shall pass a seat leakage test and a shell test in accordance with
46、MSS SP-61. 7. MARKING 7.1 Each valve shall be marked in accordance with MSS SP-25 with at least the following: a) Manufacturers identification; b) Flow direction (if applicable); c) Manufacturers model number; d) Material grade (unless coded in model number). 7.2 Additional markings may be applied i
47、n accordance with MSS SP-25. MSS STANDARD PRACTICE SP-1056 ANNEX A Referenced Standards and Applicable Dates This Annex is an integral part of this Standard Practice and is placed after the main text for convenience. Standard Name Description ASME; ANSI/ASME B1.20.1-1983 (R2006) Pipe Threads, Genera
48、l Purpose, Inch B1.20.3-1976 (R2008) Dryseal Pipe Threads, Inch B16.11-2009 Forged Fittings, Socket-Welding and Threaded B16.25-2007 Buttwelding Ends B16.34-2009 Valves Flanged, Threaded and Welding End B31.1-2007 Power Piping B31.12-2008 Hydrogen Piping and Pipelines B31.3-2008 Process Piping BPVC-
49、III-2007 Boiler and Pressure Vessel Code, Section III, Rules for Construction of Nuclear Power Plant Components BPVC-VIII, Div.1-2007 Boiler and Pressure Vessel Code, Section VIII, Division I, Rules for Construction of Pressure Vessels BPVC-IX-2007 Boiler and Pressure Vessel Code, Section IX, Welding and Brazing Qualifications CGA V-l-2005 Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections; including AMD 1 MSS SP-25-2008 Standard Marking System for Valves, Fittings, Flanges and Unions SP-61-2009 Pressure Testing of Valves SP-96-2001 (R 2005) Guideli
