ASME B16.5 Welding Neck Flange Class 900

Technical Drawing

Dimensions and Weights

Size	D	T	G	t
1/2"	120	22.3	34.9	7.0
3/4''	130	25.4	42.9	7.0
1''	150	28.6	50.8	7.0
1-1/4''	160	28.6	63.5	7.0
1-1/2''	180	31.8	73.0	7.0
2''	215	38.1	92.1	7.0
2-1/2''	245	41.3	104.8	7.0
3''	240	38.1	127.0	7.0
4''	290	44.5	157.2	7.0
5''	350	50.8	185.7	7.0
6''	380	55.6	215.9	7.0
8''	470	63.5	269.9	7.0
10''	545	69.9	323.8	7.0
12''	610	79.4	381.0	7.0
14''	640	85.8	412.8	7.0
16''	705	88.9	469.9	7.0
18''	785	101.6	533.4	7.0
20''	855	108.0	584.2	7.0
24''	1040	139.7	692.2	7.0

*The dimensions of outside diameter, flange thickness, and raised face of ASME B16.5 Class 900 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''	82.6	4	7/8	3/4	110
3/4''	88.9	4	7/8	3/4	115
1''	101.6	4	1	7/8	125
1-1/4''	111.1	4	1	7/8	125
1-1/2''	123.8	4	1-1/8	1	140
2''	165.1	8	1	7/8	145
2-1/2''	190.5	8	1-1/8	1	160
3''	190.5	8	1	7/8	145
4''	235.0	8	1-1/4	1-1/8	170
5''	279.4	8	1-3/8	1-1/4	190
6''	317.5	12	1-1/4	1-1/8	190
8''	393.7	12	1-1/2	1-3/8	220
10''	469.9	16	1-1/2	1-3/8	235
12''	533.4	20	1-1/2	1-3/8	255
14''	558.8	20	1-5/8	1-1/2	275
16''	616.0	20	1-3/4	1-5/8	285
18''	685.8	20	2	1-7/8	325
20''	749.3	20	2-1/8	2	350
24''	901.7	20	2-5/8	2-1/2	440

*The bolting dimensions of ASME B16.5 Class 900 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''	60	38	21.3	1.87
3/4''	70	44	26.7	2.56
1''	73	52	33.4	3.74
1-1/4''	73	64	42.2	4.33
1-1/2''	83	70	48.3	5.94
2''	102	105	60.3	10.8
2-1/2''	105	124	73.0	15.0
3''	102	127	88.9	13.7
4''	114	159	114.3	22.5
5''	127	190	141.3	37.4
6''	140	235	168.3	47.7
8''	162	298	219.1	81.3
10''	184	368	273.0	119
12''	200	419	323.8	157
14''	213	451	355.6	180
16''	216	508	406.4	217
18''	229	565	457.0	292
20''	248	622	508.0	362
24''	292	749	610.0	665

*The dimensions of hub and weights for ASME B16.5 Class 900 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.