Class 150 Steel Pipe Flanges

PipeSize	O	C	X	A	Y	Y	Y	T	B1	B	B2	r	D
	Outside Diameter of Flange	Thickness of Flange, Minimum	Diameter of Hub	Diameter of Weldneck	Threaded Slip-On	Lap-Joint	Weld Neck	Thread Length Threaded Flange, Minimum	Slip-On, Minimum	Lap-Joint, Minimum	Weld neck / Socket weld	Lap-Joint Flange Radius	Depth of Socket
1/2	3.5	0.44	1.19	0.84	0.62	0.62	1.88	0.62	0.88	0.9	0.62	0.12	0.38
3/4	3.88	0.5	1.5	1.05	0.62	0.62	2.06	0.62	1.09	1.11	0.82	0.12	0.44
1	4.25	0.56	1.94	1.32	0.69	0.69	2.19	0.69	1.36	1.38	1.05	0.12	0.5
1 1/4	4.62	0.62	2.31	1.66	0.81	0.81	2.25	0.81	1.7	1.72	1.38	0.19	0.56
1 1/2	5	0.69	2.56	1.9	0.88	0.88	2.44	0.88	1.95	1.97	1.61	0.25	0.62
2	6	0.75	3.06	2.38	1	1	2.5	1	2.44	2.46	2.07	0.31	0.69
2 1/2	7	0.88	3.56	2.88	1.12	1.12	2.75	1.12	2.94	2.97	2.47	0.31	0.75
3	7.5	0.94	4.25	3.5	1.19	1.19	2.75	1.19	3.57	3.6	3.07	0.38	0.81
3 1/2	8.5	0.94	4.81	4	1.25	1.25	2.81	1.25	4.07	4.1	3.55	0.38	...
4	9	0.94	5.31	4.5	1.31	1.31	3	1.31	4.57	4.6	4.03	0.44	...
5	10	0.94	6.44	5.56	1.44	1.44	3.5	1.44	5.66	5.69	5.05	0.44	...
6	11	1	7.56	6.63	1.56	1.56	3.5	1.56	6.72	6.75	6.07	0.5	...
8	13.5	1.12	9.69	8.63	1.75	1.75	4	1.75	8.72	8.75	7.98	0.5	...
10	16	1.19	12	10.75	1.94	1.94	4	1.94	10.88	10.92	10.02	0.5	...
12	19	1.25	14.38	12.75	2.19	2.19	4.5	2.19	12.88	12.92	12	0.5	...
14	21	1.38	15.75	14	2.25	3.12	5	2.25	14.14	14.18	13.25	0.5	...
16	23.5	1.44	18	16	2.5	3.44	5	2.5	16.16	16.19	15.25	0.5	...
18	25	1.56	19.88	18	2.69	3.81	5.5	2.69	18.18	18.2	17.25	0.5	...
20	27.5	1.69	22	20	2.88	4.06	5.69	2.88	20.2	20.25	19.25	0.5	...
24	32	1.88	26.12	24	3.25	4.38	6	3.25	24.25	24.25	23.25	0.5	...

Pipe Size	BOLTING PATTERN AND BOLT LENGTHS
	Diameter of Bolt Circle	Diameter of Bolt Holes	Number of Bolts	Diameter of Bolts	Machine Bolts 0.006 in Raised Face	Stud Bolts 0.006 in  Raised Face
1/2	2.38	0.62	4	0.5	2	2.5
3/4	2.75	0.62	4	0.5	2.25	2.5
1	3.12	0.62	4	0.5	2.25	2.75
1 1/4	3.5	0.62	4	0.5	2.5	2.75
1 1/2	3.88	0.62	4	0.5	2.5	3
2	4.75	0.75	4	0.62	2.75	3.25
2 1/2	5.5	0.75	4	0.62	3	3.5
3	6	0.75	4	0.62	3.25	3.75
3 1/2	7	0.75	8	0.62	3.25	3.75
4	7.5	0.75	8	0.62	3.25	3.75
5	8.5	0.88	8	0.75	3.25	4
6	9.5	0.88	8	0.75	3.5	4
8	11.75	0.88	8	0.75	3.75	4.25
10	14.25	1	12	0.88	4.25	4.75
12	17	1	12	0.88	4.25	4.75
14	18.75	1.12	12	1	4.5	5.25
16	21.25	1.12	16	1	4.75	5.5
18	22.75	1.25	16	1.12	5	6
20	25	1.25	20	1.12	5.5	6.25
24	29.5	1.38	20	1.25	6	7
30	36	1.38	28	1.25
36	42.75	1.62	32	1.5
42	49.5	1.62	36	1.5
48	56	1.62	44	1.5

Hebei shengtian pipe-fitting group Co., ltd is specialized in manufacturing and exporting forged flanges and buttwelded pipe fittings. In additation to the standard products mentioned above, we are also able to make non-standard, special-designed items according to customers’ requirement. Should any of the items be of your interests, please do not hesitate to contact us for latest information.