MSS-SP-105-1996-R2005.pdf
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1、MSS SP-105-1996 Reaffirmed 2005 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 www.mss- Fax: (703) 281- 6671 e-mai
2、l: MSS STANDARD PRACTICE SP- 105 This MSS Standard Practice was developed under the consensus of the MSS Technical Committees 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, cle
3、ar, 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, or
4、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. Substantive changes in this 1995 edition are “flagged” by parallel bars as shown on the margins of this paragraph. T
5、he specific detail of the change may be determined by comparing the material flagged with that in the previous edition. Other standards documents referred to herein are identified by the date of issue that was applicable to this standard at the date of issue of this standard. See Annex A. This stand
6、ard shall remain silent on the applicability of those other standards of prior or subsequent dates of issue even though provisions of concern may not have changed. References contained herein which are bibliographic in nature are noted as “supp1ementalin the text. Any part of this standard may be qu
7、oted. Credit lines should read extracted from MSS SP-105, 1996, Rea$ jrmed 2005 with permission of the publisher, the Manufacturers Standardization Society, Reproduction pro- hibited under copyright convention unless written permission is granted by the Manufacturers Standardization Society of the V
8、alve and Fittings Industv, Inc. Originally Approved July 1990 Copyright O, 1990 by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. 1 -,-,- MSS STANDARD P R A C T I C E SP-105 I CONTENTS I SECTION PAGE 1 . SCOPE . 1 2 . DEFINITIONS . 1 3 . MATERIALS .
9、1 4 UbSlCiN KbQUlKbMkN IS 2 - _ . . . . . . . . . . . . . . . . . . . 5 . QUALIFICATION 3 6. ACCEPTANCE TESTING . 5 7 . MARKING . 5 FIGURE 1 . DIRECT MOUNTED INSTRUMENT MANIFOLD GASKET GROOVE AND FLANGE DETAILS 4 ANNEX A . REFERENCED STANDARDS . 6 11 -,-,- MSS S T A N D A R D P R A C T I C E SP-105
10、INSTRUMENT VALVES FOR CODE APPLICATIONS 1. SCOPE 2.4. Control piping: Piping used to intercon- nect pneumatically or hydraulically operated control apparatus, or to signal transmission systems. 1.1 This Standard Practice applies to small valves and manifolds developed for and pre- dominately used in
11、 instrument, control and sampling piping systems. It covers steel and alloy valves of 1” nominal pipe size and smaller, and pressure ratings of 10,000 psi and lower at 100F. 1.2 This Standard Practice applies to instru- ment valve designs including but not limited to needle valves, packless valves,
12、ball valves, plug valves, check valves and manifold valves. Instru- ment 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, mat
13、erials of construction, and suitability for the service are the responsibility of the pur- chaser and are outside the scope of this standard. 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, cont
14、rol and sampling piping sys- 3. I tems (e.g. see ASME B31.1, Article 122.3). 2.3 Instrument piping: Piping used to inter- connect pneumatically or hydraulically operated control apparatus, or to signal transmission systems. 2.5 Sampling piping: Piping used for the col- lection of samples (such as st
15、eam, water, oil, gas, and chemicals) from process systems. 2.6 Manifold valve: Two or more instrument I I valves fabricated into a single valve body. 2.7 Cold working pressure rating: The maxi- mum allowable working pressure of a valve at ambient conditions (-20” F to IOOF), abbrevi- ated CWP. 2.8 P
16、ressure 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 diaphrcigm or bellows stem seal instead of a packing or O-
17、ring seal at the stem. MATERIALS 3.1 General. The pressure boundary parts of the valve shall be made of the materials speci- fied herein. 3.2 Non-pressure boundary parts (such as the stem, glands, packing nut) shall be made of materials compatible with the pressure bound- ary parts materials. I -,-,
18、- MSS S T A N D A R D P R A C T I C E SP-105 3.3 The following materials are acceptable for use as pressure boundary parts: l a) Materials listed in ASME/ANSI B16.34 b) Materials listed in ASME B3 1.1 c) Materials listed in ASME B31.3 d) Materials listed in ASME Boiler and Presswe Vesse! Code, Secti
19、m II!. 4.1.6 The manufacturer shall provide pressure ratings for temperatures above 100F. This temperature is the temperature of the pressure- containing shell of the component. In general, this temperature is the same as that of the contained fluid. Use of a pressure rating corre- sponding to a tem
20、perature other than that of the contained fluid is the responsibiiity of the user, subject io the requirements o appiimbie codes 3.4 Certified material test reports shall be obtained for pressure boundary parts materials. Certifications shall include chemical analysis and mechanical properties. 4. D
21、ESIGN REQUIREMENTS 4.1 Valves designed in accordance with this practice shall have their working pressure established by calculation, hydrostatic proof and burst tests or both as specified in Section 5. I and regulations. 4.2 End connections 4.2.1 Pipe threads. Tapered pipe threads shall be in accor
22、dance with one of the following: a) ANSI/ ASME B1.20.1 Pipe Threads, General Purpose (Inch) b) ANSI B1.20.3 Pipe Threads, Dryseal (Inch) c) ANSI/CGA V-1 Compressed Gas Cylin- der Valve Outlet and Inlet Connections 4.1.1 Qualification of valves designed to para- graph 4.1 shall be conducted on each d
23、esign and size of valve to establish the CWP rating. 4.2.2 Pipe socket weld connections: The socket bore diameter and the depth of socket shall be in accordance with the dimensions and toler- 4.1.2 The CWP rating of valves of identical design and size but made of different materials shall be proport
24、ional to the allowable stress of each material or may be determined by hydro- static qualification tests on valves made of each material, at the manufacturers option. 4.1.3 The CWP rating of valves of identical design and size but with different end connec- tions shall be determined by the rating of
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