ASME B16.24:2021 pdf download

ASME B16.24:2021 pdf download.Cast Copper Alloy Pipe Flanges, Flanged Fittings, and Valves
1 SCOPE
1.1 Inclusions This Standard covers the following cast copper alloy: (a) threadedpipeflangesandblindflangeshavingclass designations 150, 300, 600, 900, 1500, and 2500 (b) flangedfittingshavingratingclassdesignations150 and 300 (c) threadedandflangedvalves havingratingclass des- ignations 150, 300, 600, 1500, and 2500 1.2 Dimensional Requirements This Standard establishes requirements for (a) pressure–temperature ratings (b) size and method of designating openings for reduced fittings (c) markings (d) materials (e) dimensions (f) bolting and gaskets (g) tolerances (h) nondestructive examination for valves (i) tests 1.3 MSS SP-80 Requirements This Standard also provides dimensional requirements for flanged ends of valves conforming to MSS SP-80. 1.4 ASTM B148 Requirements ASME B16.24 requirements and the supplemental re- quirements of Mandatory Appendix I shall apply for the construction ofvalves under this Standard that are made from ASTM B148 materials.
2 GENERAL
2.1 Relevant Units This Standard states values in both SI (Metric) and U.S. Customary units. As an exception, diameters ofbolts and flange bolt holes are expressed in U.S. Customary units only. These systems ofunits are to be regarded separately as standard. In this Standard, the U.S. Customaryunits are The values stated in each system are not exact equivalents; therefore, it is required that each system of units be used independently of the other. Except for the diameter of bolts and flange bolt holes, combining values from the two systems constitutes nonconformance with the Standard. 2.2 References Codes, standards, and specifications containing provi- sions to the extent referenced herein constitute require- ments of this Standard. These references are listed in Mandatory Appendix II. 2.3 Quality Systems Guidelines relating to the product manufacturer’s quality system program are described in Nonmandatory Appendix A. 2.4 Service Conditions Criteria for selection ofmaterial suitable for particular fluid service are not within the scope of this Standard. 2.5 User Accountability This Standard cites duties and responsibilities that are to be assumedbythe flange orflange fittingand valve user in the following areas: (a) application (b) installation (c) system hydrostatic testing (d) operation (e) material selection 2.6 TimeofPurchase, Manufacture, orInstallation The pressure–temperature ratings in this Standard are applicable upon its publication to all flanges, flanged fittings, and valves within its scope that otherwise meet its requirements. For unused flanges, flanged fittings, and valves maintained in inventory, the manufac- turerofthe flanges, flanged fittings, andvalves maycertify conformance to this edition, provided that it can be demonstrated that all requirements of this edition have been met. Where such components were installed in accordance with the pressure–temperature ratings of an earlier edition of this Standard, those pressure– temperature ratings are applicable except as may be governed by the applicable code or regulation. 2.7 Denotation 2.7.1 Pressure–Temperature Rating Designation. Class, followed by a dimensionless number, is the desig- nation for pressure–temperature ratings as follows: Class 150, Class 300, Class 600, Class 900, Class 1500, and Class 2500.
3 PRESSURE–TEMPERATURE RATINGS
3.3 Pressure–Temperature Ratings of Flanged Joints Pressure–temperature ratings in this Standard applyto flangedjoints thatconformto the requirements onbolting inparas. 6.5 and9.1,ongasketsinparas.6.6and9.2,andto flanged joints that are made up in accordance with good practice for alignmentand assembly. Use ofthe pressure– temperature ratings for flanged joints not conforming to these requirements is the sole responsibility of the user. Requirements for alignment and assembly of joints and considerationofleakageduetoforcesandmomentsdevel- oped in the connected piping or equipment are not covered in this Standard. If the two flanges in a flanged jointdo nothave the same pressure–temperature ratings, the pressure–temperature rating of the joint at any temperature is the lower of the two flange pres- sure–temperature ratings at that temperature. 3.4 Rating Temperature The temperature shown for a corresponding pressure– temperature rating is the temperature of the pressure- containing shell of the flange, flanged fitting, or valve. In general, this temperature is the same as that of the contained fluid. Use of a pressure–temperature rating corresponding to a temperature other than that of the contained fluid is the responsibility of the user, subject to the applicable code or regulation. For any temperature below −29°C (−20°F), the pressure–temperature rating shall be no greater than the pressure–temperature rating for −29°C (−20°F). See para. 6.5.1 for temperature limitations on use of ASTM A307 bolting.