ASME B16.24-2006 pdf – Cast CopperAlloy Pipe Flanges and Flanged Fittings Classes 150,300,600, 900,1500, and 2500.
6.1.2 AS1M B 148. For castings made of ASThI B 148 alloy C5200, the (lange 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 furni,shed with a flat face. Unless otherwise specified by the purchaser, CLasses 600 and higher companion flanges shall be furnished with a 7-mm ( raised face, with the exception of the small male lace (on end of pipe) and the small female lace (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 04 the alternative ASME Bl6.5 facings, any required raised-face dimension shall be in addition to the basic flange thickness C of Tables 2 and 4 (Tables 1-2 and 1-4).
6.3 Threaded Flanges
Threaded flanges shall have a taper pipe thread in accordance with ASME 111.20.1. Variations in alignment of the thread with the axis of the flange shall not exceed 5 mm/rn (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 mafor diameter of the thread at the pipe end of the flange at are angle approximately 45 dq 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.
66 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 th pipe close In the face o4 the flange when parts are assembled by power equipmeni The additional length and number of turns are shown in Annex A of ASME B16.5 fur ASME BI.20.1 threads,6J flanged Bolt Holes
Bolt holes are in multiples of four. Bolt holes shall be equally spaced and pairs of boll holes shall straddle lining or valve cnterlines.
6.9 Spot and Back Facing
flanges and flanged fittings covered by this Standard shall have bearing surfaces for bolting thai shall be paralI d to the flange face within I dcg. Any sjx,k or back facing shall not reduce the flange thickness C below the dimension required by para. 6.1. 11w spot lacing 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.).
7.1 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 1-3 and 1-5).
IL’) Reducing 90-deg elbows and reducing side outlet 90-dog elbows shall have the same center-to-face dimensions as straight size fittings shown in Tables 3 and 5 (Tables 1.3 and 1-5). corresponding to the size of the largest opening.
(C) Special degree elbows ranging from I deg to 45 dog. inclusively, shall have the same center-b-lace dimensions given for 45-dog elbows and those over 45 deg and up to 90 dog, inclusively, shall have the same center-to-lace dimensions given for 90-dc’g elbows. The angle dvsigiation of an elbow is its deflection from straight line flow and is the angle between the flange laces.