ASME B16.5 Welding Neck Flange Class 2500

Technical Drawing

Dimensions and Weights

Size	D	T	G	t
1/2''	135	30.2	34.9	7.0
3/4''	140	31.8	42.9	7.0
1''	160	35.0	50.8	7.0
1-1/4''	185	38.1	63.5	7.0
1-1/2''	205	44.5	73.0	7.0
2''	235	50.9	92.1	7.0
2-1/2''	265	57.2	104.8	7.0
3''	305	66.7	127.0	7.0
4''	355	76.2	157.2	7.0
5''	420	92.1	185.7	7.0
6''	485	108.0	215.9	7.0
8''	550	127.0	269.9	7.0
10''	675	165.1	323.8	7.0
12''	760	184.2	381.0	7.0

*The dimensions of outside diameter, flange thickness, and raised face of ASME B16.5 Class 2500 welding neck flange. D: outside diameter of flange; T: flange thickness; t: height of raised face; G: outside diameter of raised face; all units are mm.

Size	K	n	d	l	L
1/2''	88.9	4	7/8	3/4	120
3/4''	95.2	4	7/8	3/4	125
1''	108.0	4	1	7/8	140
1-1/4''	130.2	4	1-1/8	1	150
1-1/2''	146.0	4	1-1/4	1-1/8	170
2''	171.4	8	1-1/8	1	180
2-1/2''	196.8	8	1-1/4	1-1/8	195
3''	228.6	8	1-3/8	1-1/4	220
4''	273.0	8	1-5/8	1-1/2	255
5''	323.8	8	1-7/8	1-3/4	300
6''	368.3	8	2-1/8	2	345
8''	438.2	12	2-1/8	2	380
10''	539.8	12	2-5/8	2-1/2	490
12''	619.1	12	2-7/8	2-3/4	540

*The bolting dimensions of ASME B16.5 Class 2500 welding neck flange. K: diameter of bolt circle; n: number of bolts; d: diameter of bolt holes; l: diameter of bolts; L: length of stud bolts for 7 mm raised face flange; The length of the stud bolt does not include the height of the points. All units are mm except that d and l are provided in inch.

Size	Y	X	A	Ms
1/2''	73	43	21.3	3.12
3/4''	79	51	26.7	3.70
1''	89	57	33.4	5.24
1-1/4''	95	73	42.2	7.74
1-1/2''	111	79	48.3	10.9
2''	127	95	60.3	16.2
2-1/2''	143	114	73.0	23.7
3''	168	133	88.9	36.2
4''	190	165	114.3	55.3
5''	229	203	141.3	92.5
6''	273	235	168.3	143
8''	318	305	219.1	215
10''	419	375	273.0	406
12''	464	441	323.8	572

*The dimensions of hub and weights for ASME B16.5 Class 2500 welding neck flange. Y: length through hub; X: diameter of hub at base; A: diameter of hub at top welding point; Ms: approximate weights/ masses of the flange; Generally, the bore diameter B of flange is equal to A minus two times of nominal wall thickness of adjoining pipe. All dimensions are in mm and the weights are in kg.

ASME B16.5 WN Flanges: Dimensions & Weights
Class150	Class 300	Class 400	Class 600
Class 900	Class 1500	Class 2500	-

*Click to view the dimensions and weights for other pressure ratings.