ASME B16.24-2016 pdf download

ASME B16.24-2016 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) threaded pipe flanges and blind flanges having class designations 150, 300, 600, 900, 1500, and 2500 (b) flanged fittings having rating class designations 150 and 300 (c) threaded and flanged valves having rating class designations 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 require- ments for flanged ends of valves conforming to MSS SP-80. 1.4 ASTM B148 Requirements ASME B16.24 requirements and the supplemental requirements of Mandatory Appendix II shall apply for the construction of valves 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 of bolts and flange bolt holes are expressed in U.S. Customary units only. These systems of units are to be regarded separately as standard. Within the text, 1 the U.S. Customary units are shown in parentheses or in separate tables that appear in Mandatory Appendix I. The values stated in each system are not exact equiva- lents; therefore, it is required that each system of units be used independently of the other. Except for the diam- eter of bolts and flange bolt holes, combining values from the two systems constitutes nonconformance with the Standard. 2.2 References Codes, standards, and specifications containingprovi- sions to the extent referenced herein constitute require- ments of this Standard. These references are listed in Mandatory Appendix III. 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 assumed by the flange or flange fitting and valve user in the following areas: (a) application (b) installation (c) system hydrostatic testing (d) operation (e) material selection 2.6 Time of Purchase, Manufacture, or Installation 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 manufacturer of the flanges, flanged fittings, and valves may certify 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.
3.3 Pressure–Temperature Ratings of Flanged Joints Pressure–temperature ratings in this Standard apply to flanged joints that conform to the requirements on bolting in paras. 6.5 and 9.1, on gaskets in paras. 6.6 and 9.2, and to flanged joints that are made up in accor- dance with good practice for alignment and assembly. Use of the 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 consideration of leakage due to forces and moments developed in the connected pip- ing or equipment are not covered in this Standard. If the two flanges in a flanged joint do not have the same pressure–temperature ratings, the pressure– temperature rating of the joint at any temperature is the lower of the two flange pressure–temperature ratings at that temperature. 3.4 Rating Temperature The temperatureshownfora correspondingpressure– 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 orregulation. For anytemperature 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 limita- tions on use of ASTM A307 bolting. 3.5 Low-Temperature Service It is the responsibility of the user to verify that all of the component materials (i.e., flange, bolting, and gas- ket, etc.) selected are acceptable for use in temperature applications below −29°C (−20°F). Whenpermitted, cop- per alloy flanges, flanged fittings, and valves manufac- tured in accordance with this Standard, assembled with suitable bolting and gaskets, and subject to the applica- ble code or regulations shall not be used at temperatures below −198°C (−325°F) except for ASTM B148 alloy C95200, which can be used to −269°C (−452°F). For guid- ance on low-temperature service, refer to ASME B31T.