ANSI / ASME B16.5 Class 900 Threaded Flange Dimensions

Threaded flanges are commonly used in pipe connections where welding is not possible, such as in certain environments, hazardous conditions, or during maintenance. They are often used in industries like oil, natural gas, chemical processing, and petrochemicals.

ANSI / ASME B16.5 Class 900 Threaded Flange

Class 900 Threaded Flange Dimensions in inch/lbs

Class 900 Threaded Flange Dimensions in mm/kg

Class 900 Threaded Flange Dimensions in inch/lbs

Class 900 Threaded Flange Dimensions in mm/kg

The ANSI / ASME B16.5 Class 900 Threaded Flange is a type of high-pressure flange designed for piping systems, with a pressure rating of Class 900, which can withstand pressures up to 900 pounds per square inch (PSI) at specified temperatures. The threaded flange connects to the pipe without the need for welding, using threads that match the threads on the pipe.

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Nominal Pipe Size	Outside Diameter (O)	Thickness (T)	Raised Face Diameter (R)	Length Thru Hub (Y)	Hub Diameter (X)	Approximate Weight (lbs)	Bolt Circle (C)	Number of Holes	Diameter of Holes
1/2	4.75	0.88	1.38	1.25	1.50	4	3.25	4	0.88
3/4	5.13	1.00	1.69	1.38	1.75	5	3.50	4	0.88
1	5.88	1.13	2.00	1.63	2.06	8	4.00	4	1.00
1 1/4	6.25	1.13	2.50	1.63	2.50	9	4.38	4	1.00
1 1/2	7.00	1.25	2.88	1.75	2.75	12	4.88	4	1.13
2	8.50	1.50	3.63	2.25	4.13	25	6.50	8	1.00
2 1/2	9.63	1.63	4.13	2.50	4.88	36	7.50	8	1.13
3	9.50	1.50	5.00	2.13	5.00	26	7.50	8	1.00
4	11.50	1.75	6.19	2.75	6.25	53	9.25	8	1.25
5	13.75	2.00	7.31	3.13	7.50	83	11.00	8	1.38
6	15.00	2.19	8.50	3.38	9.25	110	12.50	12	1.25
8	18.50	2.50	10.63	4.00	11.75	170	15.50	12	1.50
10	21.50	2.75	12.75	4.25	14.50	245	18.50	16	1.50
12	24.00	3.13	15.00	4.63	16.50	325	21.00	20	1.50
14	25.25	3.38	16.25	5.13	17.75	400	22.00	20	1.63
16	27.75	3.50	18.50	5.25	20.00	425	24.25	20	1.75
18	31.00	4.00	21.00	6.00	22.25	600	27.00	20	2.00
20	33.75	4.25	23.00	6.25	24.50	730	29.50	20	2.13
24	41.00	5.50	27.25	8.00	29.50	1400	35.50	20	2.63

Nominal Pipe Size	Outside Diameter (O)	Thickness (T)	Raised Face Diameter (R)	Length Thru Hub (Y)	Hub Diameter (X)	Approximate Weight (kg)	Bolt Circle (C)	Number of Holes	Diameter of Holes
1/2	120.65	22.35	35.05	31.75	38.10	1.81	82.55	4	22.35
3/4	130.30	25.40	42.93	35.05	44.45	2.27	88.90	4	22.35
1	149.35	28.70	50.80	41.40	52.32	3.63	101.60	4	25.40
1 1/4	158.75	28.70	63.50	41.40	63.50	4.08	111.25	4	25.40
1 1/2	177.80	31.75	73.15	44.45	69.85	5.44	123.95	4	28.70
2	215.90	38.10	92.20	57.15	104.90	11.34	165.10	8	25.40
2 1/2	244.60	41.40	104.90	63.50	123.95	16.33	190.50	8	28.70
3	241.30	38.10	127.00	54.10	127.00	11.79	190.50	8	25.40
4	292.10	44.45	157.23	69.85	158.75	24.04	234.95	8	31.75
5	349.25	50.80	185.67	79.50	190.50	37.65	279.40	8	35.05
6	381.00	55.63	215.90	85.85	234.95	49.89	317.50	12	31.75
8	469.90	63.50	270.00	101.60	298.45	77.11	393.70	12	38.10
10	546.10	69.85	323.85	107.95	368.30	111.13	469.90	16	38.10
12	609.60	79.50	381.00	117.60	419.10	147.42	533.40	20	38.10
14	641.35	85.85	412.75	130.30	450.85	181.44	558.80	20	41.40
16	704.85	88.90	469.90	133.35	508.00	192.78	615.95	20	44.45
18	787.40	101.60	533.40	152.40	565.15	272.15	685.80	20	50.80
20	857.25	107.95	584.20	158.75	622.30	331.12	749.30	20	54.10
24	1041.40	139.70	692.15	203.20	749.30	635.03	901.70	20	66.80