Flange Bolting for Class 2500 ASME B16.5 Flanges

1. Technical drawings of flange bolting for Class 2500 ASME B16.5 flanges.

2. Dimensions of flange bolting for Class 2500 ASME B16.5 flanges.

NPS	O inch mm	W inch mm	m inch	n	d inch	L1 inch mm	L2 inch mm	L3 inch mm
1/2	5.25 135	3.50 88.9	7/8	4	3/4	4.75 120	4.50 115	4.75 120
3/4	5.50 140	3.75 95.2	7/8	4	3/4	5.00 125	4.75 120	5.00 125
1	6.25 160	4.25 108.0	1	4	7/8	5.50 140	5.25 135	5.50 140
1 1/4	7.25 185	5.12 130.2	1 1/8	4	1	6.00 150	5.75 145	6.00 150
1 1/2	8.00 205	5.75 146.0	1 1/4	4	1 1/8	6.75 170	6.50 165	6.75 170
2	9.25 235	6.75 171.4	1 1/8	8	1	7.00 180	6.75 170	7.00 180
2 1/2	10.50 265	7.75 196.8	1 1/4	8	1 1/8	7.75 195	7.50 190	8.00 205
3	12.00 305	9.00 228.6	1 3/8	8	1 1/4	8.75 220	8.50 215	9.00 230
4	14.00 355	10.75 273.0	1 5/8	8	1 1/2	10.00 255	9.75 250	10.25 260
5	16.50 420	12.75 323.8	1 7/8	8	1 3/4	11.75 300	11.50 290	12.25 310
6	19.00 485	14.50 368.3	2 1/8	8	2	13.50 345	13.25 335	14.00 355
8	21.75 550	17.25 438.2	2 1/8	12	2	15.00 380	14.75 375	15.50 395
10	26.50 675	21.25 539.8	2 5/8	12	2 1/2	19.25 490	19.00 485	20.00 510
12	30.00 760	24.38 619.1	2 7/8	12	2 3/4	21.25 540	21.00 535	22.00 560

1. For the denotation of dimensions “NPS, O, W, m, n, d, L1, L2, L3”, please refer to that of flange bolting for Class 1500. The length of the stud bolt doesn’t include the height of the points.

2. The bolting of ASME B16.5 class 2500 flanges can be furnished as stud bolts with nuts. Stud bolts can be used for flanges with either raised face or ring joint face. All dimensions are provided in mm and inch units.

ASME B16.5 Flange Bolting Specification by Classes
Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 2500