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MSS SP-9-2001

MSS SP-9-2001 "Spot Facing for Bronze, Iron and Steel Flanges"

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Денис Пекшуев
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2K views6 pages

MSS SP-9-2001

MSS SP-9-2001 "Spot Facing for Bronze, Iron and Steel Flanges"

Uploaded by

Денис Пекшуев
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Spot Facing For MSS SP-9-2001 Bronze, Iron and Steel Flanges Standard Practice Developed and Approved by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE Vienna, Virginia 22180 (703) 281-6613 MSS. STANDARD PRACTICE eee ‘This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 102, 110,201, 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, 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 itself preclude the manufacture, sale, or use of products not conforming to the Standard Practice. Mandatory con- formance is established only by reference in a code, specification, sales contract, or public law, as applicable. Substantive changes in the 2001 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. Unless otherwise specifically noted in the MSS SP, any standard referred to herein is identified by the date of issue that was applicable to the referenced standards) at the date of issue of the MSS SP. (See Annex A.) | U-s. customary units in this SP are the standard; the metric units are for reference only Any part of this standard may be quoted. Credit lines should read ‘Extracted from MSS SP-9, 2001 with permission of the publisher, the Manufacturers Standardization Society." Reproduction prohibited under copyright convention unless written permission is granted by the Manufacturers Standardization Society of the Valve and Fittings Industry, Ine. Originally Approved July 1929 Copyright ©, 1984 by Manufacturers Standardization Society ofthe Valve and Fittings Industry, Ine Printed in US.A. MSS. STANDARD PRACTICE SPOT FACING FOR BRONZE, IRON AND STEEL FLANGES 1. SCOPE This MSS Standard applies to the spot facing of pipe flanges in bronze, gray iron, ductile iron or steel when cast integral with valves and fi tings, as well as the companion flanges, when so required by the standard for the product. 2. DESIGN 2.1 The dimensions for spot facing apply to the use of hexagon head bolts or hexagon nuts in accordance with American National Standard heavy series, ASME B18.2.land ASME B18.2.2. For bolt sizes 1/2 and 5/8, the minimum diameter of spot facing is sufficient for regular square head bolts in accordance with ASME B18.2.1 2.2. The minimum spot facing diameters illustrated in Figure 1 are listed in Table 1 for bolt sizes 1/2 in, through 3 1/2 in. 2.3 When culting into the hub of companion flanges or the body of flanged fittings and valves with spot facing tools is necessary, the resulting wall thick- ‘ness shall not be less than the minimum required thick- ness specified in the appropriate standard, 2.4 Eccentricity of the spot face diameter with the bolt hole must be limited to provide sufficient facing for the bolt head and nut used in the joint assembly 2.5 The bolt sizes for which spot facing is provided include all the sizes required in the various flange standards as indicated: FIGURE 1 - Flange With Spot Facing Table 1 - Spot Face Diameters Spot Face Diameter Spot Face Diameter Bolt Minimum Bolt Minimom ‘See Toches| ma Sie Trees ™ 12 12 2k 138 Bi 72 38 137 348 ry 331 ur 34 136 396 7 330 we 7 7k 452 2 375 353 1 2.03, 316 2 mn 1062 Lim 221 561 zie 1a 13 a 243 aa 23M 506 18s) 13 265 oa 3 550 197 nia 27 729 31a oa Tone

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