ASME B16.24:2011 pdf download

ASME B16.24:2011 pdf download.Cast Copper Alloy Pipe Flanges and Flanged Fittings
1 SCOPE
This Standard covers cast copper alloy threaded-joint pipe flanges and blind pipe flanges having rating class designations 150, 300, 600, 900, 1500, and 2500. This Standard also covers flanged fittings having rating class designations 150 and 300. It 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) tests This Standard also provides dimensional requirements for flanged ends of valves conforming to MSS SP-80.
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, 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 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 programs are described in Nonmandatory Appendix A.2.4 Service Conditions Criteria for selection of material 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 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 and flanged fittings within its scope that otherwise meet its require- ments. For unused flanges or flanged fittings maintained in inventory, the manufacturer of the flanges or flanged fittings may certify conformance to this edition, pro- vided that it can be demonstrated that all requirements of this edition have been met. Where such components were installed in accordance with the pressure–tempera- ture 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. 2.7.2 Size. NPS, followed by a dimensionless num- ber, is the designation for nominal fittings size. NPS is related to the reference nominal diameter (DN) used in international standards.
3 PRESSURE–TEMPERATURE RATINGS
3.1 General (a) For flanges and flanged fittings, the tabulated pressure–temperature ratings of Table 1 (Table I-1) shall apply for the materials listed in paras. 6.2.1, 6.2.2, and 6.3, provided that the dimensional requirements of Tables 2 through 5 (Tables I-2 through I-5) are met. (b) For flanges only, the tabulated pressure– temperature ratings of Table 6 (Table I-6) shall apply for the material listed in para. 6.2.3, provided that the dimensional requirements of ASME B16.5 are met. (c) Pressure ratings at temperatures intermediate to those tabulated may be obtained by linear interpolation. (d) Linear interpolation of pressure–temperature rat- ings between class designations is not permitted. 3.2 Flanged Joints A flanged joint is composed of separate and indepen- dent, although interrelated, components. The flanges, the gasket, and the bolting are assembled by another influence — the assembler. Proper controls must be exer- cised in the selection and application for all these ele- ments to attain a joint that has acceptable leak tightness. Special techniques (e.g., controlled bolt tightening) are described in ASME PCC-1.