ASME B16.24-2006 pdf download

ASME B16.24-2006 pdf download.Cast Copper Alloy Pipe Flanges and Flanged Fittings.
5 MATERIALS 5.1 General Products covered by this Standard shall be made of castings produced to the requirements of para. 5.2 or 5.3. 5.2 Flanges Flanges shall be in accordance with the material requirements specified in paras. 5.2.1 through 5.2.3. 5.2.1 ASTM B 61. Castings shall meet the require- ments of ASTM B 61 alloy UNS C92200. 5.2.2 ASTM B 62. Castings shall meet the require- ments of ASTM B 62 alloy UNS C83600. 5.2.3 ASTM B 148. Castings shall meet the require- ments of ASTM B 148 alloy UNS C95200, and the addi- tional requirements specified in paras. 5.2.3.1 through 5.2.3.5. 5.2.3.1 Ordering Information. Ordering informa- tion for ASTM B 148 castings shall include tests on each lot and the form of the test bar. 5.2.3.2 Test Bars. For ASTM B 148 castings, a min- imum of three test bars shall be poured from each lot of cast metal. Chemical composition and mechanical property tests shall be performed using the test bars from each lot. 5.2.3.3 Sampling. For ASTM B 148 castings, the sample for chemical analysis shall be taken from the test bar casting or other casting sample in such a manner as to be representative of each casting lot. 5.2.3.4 Weld Repair Approval. For ASTM B 148 castings, a flange casting shall not be repaired, plugged, welded, or burned-in unless permission from the user of the flange has been previously secured. This will be requested of the user upon the manufacturer’s determi- nation that casting defects are such that after the approved repair, the usefulness and the strength of the casting will not be impaired. 5.2.3.5 Weld Repair. For ASTM B 148 castings, preparation for repair welding shall include inspection to ensure complete removal of the defect. Repairs shall be made utilizing welding procedures qualified in accor- dance with Section IX of the ASME Boiler and Pressure Vessel Code. Repair welding shall be done by welders or welding operators meeting the qualification require- ments of that Code. 5.3 Flanged Fittings Material for flanged fittings shall be in accordance with either para. 5.2.1 or 5.2.2. 5.4 Bolting Bolting materials recommended for use with copper alloy flanges and flanged fittings are described in paras. 5.4.1 and 5.4.2. 9 5.4.1 Steel Bolting. Carbon steel bolting conform- ing to ASTM A 307 is not recommended to be used below −29°C (−20°F) nor above 204°C (400°F) and is limited to use with Classes 150 and 300 flanges and flanged fittings.
6.1.2 ASTM B 148. For castings made of ASTM B 148 alloy C95200, the flange dimensions shall be in accordance with the dimensional requirements of ASME B16.5. 6.2 End-Flange Facings Unless otherwise specified by the purchaser, Classes 150 and 300 blind and companion flanges shall be fur- nished with a flat face. Unless otherwise specified by thepurchaser, Classes 600 andhigher companionflanges shall be furnished with a 7-mm (0.25-in.) raised face, with the exception of the small male face (on end of pipe) and the small female face (on end of pipe). When using straight pipe threads, any of the flange pipe threads shown in ASME B16.5 may be used with copper alloy flanges. When flanges of ASTM B 61 or B 62 are furnished with one of the alternative ASME B16.5 fac- ings, any required raised-face dimension shall be in addition to the basic flange thickness C of Tables 2 and 4 (Tables I-2 and I-4). 6.3 Threaded Flanges Threaded flanges shall have a taper pipe thread in accordance with ASME B1.20.1. Variations in alignment of the thread with the axis of the flange shall not exceed 5 mm/m (0.06 in./ft) (0.5%). 6.4 Thread Chamfer All flanges of ASTM B 61 and B 62 materials shall be made without a counterbore. The threads shall be chamfered approximately to the major diameter of the thread at the pipe end of the flange at an angle approxi- mately 45 deg with the axis of the thread. The chamfer shall be concentric with the thread and shall be included in the measurement of the thread length. 6.5 Thread Length The length of the thread shall include the chamfer. 6.6 Thread Gaging The gaging notch of the thread gage shall come flush with the bottom of the chamfer in all threaded flanges, and shall be considered the intersection of the chamfer cone and the pitch cone of the thread. This depth of chamfer is approximately equal to one-half the pitch of the thread. The maximum allowable thread variation is one turn large or small from the gaging notch. 6.7 Threaded Flange Assembly External pipe threads used with higher pressure flanges shall be longer than normal to bring the end of the pipe close to the face of the flange when parts are assembled by power equipment. The additional length and number of turns are shown in Annex A of ASME B16.5 for ASME B1.20.1 threads. 10 6.8 Flanged Bolt Holes Bolt holes are in multiples of four. Bolt holes shall be equally spaced and pairs of bolt holes shall straddle fitting or valve centerlines. 6.9 Spot and Back Facing Flanges and flanged fittings covered by this Standard shallhave bearingsurfaces forboltingthatshallbe paral- lel to the flange face within 1 deg. Any spot or back facing shall not reduce the flange thickness C below the dimension required by para. 6.1. The spot facing diameter shall be in accordance with MSS-SP-9. When cutting into the hub of flanges or flanged fittings with back facing tools, the intersection shall have a radius of not less than 1.5 mm (0.06 in.). 7 FITTING DIMENSIONS 7.1 Center-to-Face Dimensions 7.1.1 Side Outlet Fittings. Side outlet elbows and side outlet tees shall have all openings on intersecting centerlines. 7.1.2 Elbows (a) The center-to-face dimensions for straight size 90-deg elbows, 90-deg–long radius elbows, 45-deg elbows, and side outlet 90-deg elbows are shown in Tables 3 and 5 (Tables I-3 and I-5). (b) Reducing 90-deg elbows and reducing side outlet 90-deg elbows shall have the same center-to-face dimen- sions as straight size fittings shown in Tables 3 and 5 (Tables I-3 and I-5), corresponding to the size of the largest opening. (c) Special degree elbows ranging from 1 deg to 45 deg, inclusively, shall have the same center-to-face dimensions given for 45-deg elbows and those over 45 deg and up to 90 deg, inclusively, shall have the same center-to-face dimensions given for 90-deg elbows. The angle designation of an elbow is its deflection from straight line flow and is the angle between the flange faces. 7.1.3 Tees, Crosses, and Laterals (a) The center-to-face dimensions for straight size tees, with or without side outlet, crosses, and laterals are shown in Tables 3 and 5 (Tables I-3 and I-5). (b) Reducing tees, with or without side outlet, reduc- ing crosses, and reducing laterals shall have the same center-to-face dimensions as straight size fittings shown in Tables 3 and 5 (Tables I-3 and I-5), corresponding to the size ofthe largestopening. Tees, crosses, and laterals, reducing on the run only, shall have the same center-to- face dimensions as straight size fittings shown in Tables 3 and 5 (Tables I-3 and I-5), corresponding to the size of the largest opening.