ASME B16.24-2006 pdf download.Cast Copper Alloy Pipe Flanges and Flanged Fittings Classes 150, 300, 600, 900, 1500, and 2500.
1 SCOPE 1.1 General 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 alsoprovides dimensional requirements for flanged ends of valves conforming to MSS SP-80. 1.2 Convention For the purpose of determining conformance with this Standard, the convention for fixing significant digits where limits (maximumand minimumvalues) are speci- fied shall be rounded off as defined in ASTM E 29. This requires that an observed or calculated value shall be rounded off to the nearest unit in the last right-hand digit used for expressing the limit. Decimal values and tolerances do not imply a particular method of mea- surement. 1.3 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 Customary units only. These systems of units are to be regarded separately as the standard. Within the text, the Custom- ary units are shown in parentheses or in separate tables. (Tables showing dimensions in equivalent Customary units are found in Mandatory Appendix I.) The values statedineachsystemarenotexactequivalents;therefore, it is required that each system of units be used indepen- dently of the other. Except for the diameter of bolts and flange bolt holes, combining values from the two systems constitutes nonconformance with the standard.
1.5 Quality Systems Guidelines relating to the product manufacturer’s quality system programs are described in Nonmanda- tory Appendix A. 1.6 Service Conditions Criteria for selection of material suitable for particular fluid service are not within the scope of this Standard. 1.7 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 1.8 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. Forunused 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 intalled in accordance with the pressure–tempera- ture ratings of an earlier edition of this Standard, those ratings are applicable except as may be governed by the applicable code or regulation. 1.9 Denotation 1.9.1 Pressure Rating Designation. Class, followed by a dimensionless number, is the designation for pressure–temperature ratings as follows: Classes 150, 300, 600, 900 1500, and 2500.
(c) Pressure ratings at temperatures intermediate to those tabulated may be obtained by linear interpolation. (d) Linear interpolation of pressure ratings between class designations is not permitted. 2.2 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. 2.3 Ratings of Flanged Joints Ratings in this Standard apply to flanged joints that conform to the requirements on bolting in paras. 5.4 and 8.1, on gaskets in paras. 5.5 and 8.2, and flanged joints that are made up in accordance with good practice for alignment and assembly. Use of the 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 rating of the joint at any temperature is the lower of the two flange ratings at that temperature.