ANSI / ASME B16.5 Class 900 Lap Joint Flange Dimensions

Lap Joint flanges are commonly used in low-pressure, non-corrosive medium systems, such as in industries like food processing, pharmaceuticals, and water treatment.

ANSI / ASME B16.5 Class 900 Lap Joint Flange

Class 900 Lap Joint Flange Dimensions in Inch/lbs

Class 900 Lap Joint Flange Dimensions in mm/kg

Class 900 Lap Joint Flange Dimensions in Inch/lbs

Class 900 Lap Joint Flange Dimensions in mm/kg

The ANSI / ASME B16.5 Class 900 Lap Joint Flange is a type of flange used in high-pressure piping systems, with a pressure rating of Class 900 (meaning it can handle pressures up to 900 PSI at a specific temperature). This flange is designed to work with a lap joint stub end and is commonly used in situations where frequent dismantling of the piping system is required.

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Nominal Pipe Size	Outside Diameter (O)	Thickness (T)	Length Thru Hub (Y)	Hub Diameter (X)	Radius (r)	Bore (B)	Approximate Weight (lbs)	Bolt Circle (C)	Number of Holes	Diameter of Holes
1/2	4.75	0.88	1.38	1.25	0.13	1.50	4	3.25	4	0.88
3/4	5.13	1.00	1.69	1.38	0.13	1.75	5	3.50	4	0.88
1	5.88	1.13	2.00	1.63	0.13	2.06	8	4.00	4	1.00
1 1/4	6.25	1.13	2.50	1.63	0.19	2.50	9	4.38	4	1.00
1 1/2	7.00	1.25	2.88	1.75	0.25	2.75	12	4.88	4	1.13
2	8.50	1.50	3.63	2.25	0.31	4.13	25	6.50	8	1.00
2 1/2	9.63	1.63	4.13	2.50	0.31	4.88	35	7.50	8	1.13
3	9.50	1.50	2.13	5.00	0.38	3.60	45	7.50	8	1.00
4	11.50	1.75	2.75	6.25	0.44	4.60	51	9.25	8	1.25
5	13.75	2.00	3.13	7.50	0.50	5.69	81	11.00	8	1.38
6	15.00	2.19	3.38	9.25	0.50	6.75	105	12.50	12	1.25
8	18.50	2.50	4.50	11.75	0.50	8.75	190	15.50	12	1.50
10	21.50	2.75	5.00	14.50	0.50	10.92	275	18.50	16	1.50
12	24.00	3.13	5.63	16.50	0.50	12.92	370	21.00	20	1.50
14	25.25	3.38	6.13	17.75	0.50	14.18	415	22.00	20	1.63
16	27.75	3.50	6.50	20.00	0.50	16.19	465	24.25	20	1.75
18	31.00	4.00	7.50	22.25	0.50	18.20	650	27.00	20	2.00
20	33.75	4.25	8.25	24.50	0.50	20.25	810	29.50	20	2.13
24	41.00	5.50	10.50	29.50	0.50	24.25	1550	35.50	20	2.63

Nominal Pipe Size	Outside Diameter (O)	Thickness (T)	Length Thru Hub (Y)	Hub Diameter (X)	Radius (r)	Bore (B)	Approximate Weight (Kg)	Bolt Circle (C)	Number of Holes	Diameter of Holes
1/2	120.65	22.35	35.05	31.75	3.30	38.10	1.81	82.55	4	22.23
3/4	130.30	25.40	42.93	35.05	3.30	44.45	2.27	88.90	4	22.23
1	149.35	28.70	50.80	41.40	3.30	52.32	3.63	101.60	4	25.40
1 1/4	158.75	28.70	63.50	41.40	4.83	63.50	4.08	111.25	4	25.40
1 1/2	177.80	31.75	73.15	44.45	6.35	69.85	5.44	123.95	4	28.58
2	215.90	38.10	92.20	57.15	7.87	104.90	11.34	165.10	8	25.40
2 1/2	244.60	41.40	104.90	63.50	7.87	123.95	15.88	190.50	8	28.58
3	241.30	38.10	54.10	127.00	9.65	91.44	20.41	190.50	8	25.40
4	292.10	44.45	69.85	158.75	11.18	116.84	23.13	234.95	8	31.75
5	349.25	50.80	79.50	190.50	12.70	144.53	36.74	279.40	8	34.93
6	381.00	55.63	85.85	234.95	12.70	171.45	47.63	317.50	12	31.75
8	469.90	63.50	114.30	298.45	12.70	222.25	86.18	393.70	12	38.10
10	546.10	69.85	127.00	368.30	12.70	277.37	124.74	469.90	16	38.10
12	609.60	79.50	143.00	419.10	12.70	328.17	167.83	533.40	20	38.10
14	641.35	85.85	155.70	450.85	12.70	360.17	188.24	558.80	20	41.28
16	704.85	88.90	165.10	508.00	12.70	411.23	210.92	615.95	20	44.45
18	787.40	101.60	190.50	565.15	12.70	462.28	294.83	685.80	20	50.80
20	857.25	107.95	209.55	622.30	12.70	514.35	367.41	749.30	20	53.98
24	1041.40	139.70	266.70	749.30	12.70	615.95	703.06	901.70	20	66.68