Flanges

Cross-Section

150lb Flange

Length through Hub Y

Nominal Bore	Pipe OD A	Flange dia. B	Raised Face dia. D	Flange Thickness T	Welding Neck	Slip-on Screwed Socket-weld	Bolt PCD	No. of Bolts	Bolt Hole dia.
15	21.4	88.9	34.9	11.1	47.6	15.9	60.3	4	15.9
20	27.0	98.4	42.9	12.7	52.4	15.9	69.8	4	15.9
25	34.1	107.9	50.8	14.3	55.6	17.5	79.4	4	15.9
32	42.9	117.5	63.5	15.9	57.1	20.6	88.9	4	15.9
40	48.4	127.0	73.0	17.5	61.9	22.2	98.4	4	15.9
50	60.3	152.4	92.1	19.0	63.5	25.4	120.6	4	19.0
65	73.0	177.8	104.8	22.2	69.8	28.6	139.7	4	19.0
80	88.9	190.5	127.0	23.8	69.8	30.2	152.4	4	19.0
90	101.6	215.9	139.7	23.8	71.4	31.7	177.8	8	19.0
100	114.3	228.6	157.2	23.8	76.2	33.3	190.5	8	19.0
125	141.3	254.0	185.7	23.8	88.9	36.5	215.9	8	22.2
150	165.1	279.4	215.9	25.4	88.9	39.7	241.3	8	22.2
	168.3	279.4	215.9	25.4	88.9	39.7	241.3	8	22.2
200	219.1	342.9	269.9	28.6	101.6	44.4	298.4	8	22.2
250	273.1	406.4	323.8	30.2	101.6	49.2	361.9	12	25.4
300	323.9	482.6	381.0	31.7	114.3	55.6	431.8	12	25.4
350	355.6	533.4	412.7	34.9	127.0	57.1	476.2	12	28.6
400	406.4	596.9	469.9	36.5	127.0	63.5	539.7	16	28.6
450	457.2	635.0	533.4	39.7	139.7	68.3	577.8	16	31.7
500	508	698.5	584.2	42.9	144.5	73.0	635.0	20	31.7
600	609.6	812.8	692.1	47.6	152.4	82.5	749.3	20	34.9

Approximate Mass (kg)

Nominal Bore mm	Weld Neck	Socket Weld Slip-on Screwed	Blind
15	0.79	0.45	0.57
20	0.86	0.68	0.91
25	1.09	0.95	1.09
32	1.41	1.13	1.25
40	1.81	1.36	1.70
50	2.83	2.22	2.77
65	4.42	3.82	4.04
80	5.22	4.08	5.44
90	5.44	4.99	6.35
100	7.48	5.94	7.37
125	9.53	6.12	9.07
150	11.34	8.16	127.0
200	19.05	12.70	21.77
250	25.40	17.24	31.75
300	38.10	27.22	45.36
350	51.26	35.38	58.97
400	63.50	42.18	77.71
450	68.04	52.62	102.51
500	81.65	65.32	123.38
600	118.84	91.63	203.21

 

300lb Flange

Length through Hub Y

Nominal Bore	Pipe OD A	Flange dia. B	Raised Face dia. D	Flange Thickness T	Welding Neck	Slip-on Screwed Socket-weld	Bolt PCD	No. of Bolts	Bolt Hole dia.
15	21.4	95.2	34.9	14.3	52.4	22.2	66.7	4	15.9
20	27.0	117.5	42.9	15.9	57.1	25.4	82.6	4	19.0
25	34.1	123.8	50.8	17.5	61.9	27.0	88.9	4	19.0
32	42.9	133.3	63.5	19.0	65.1	27.0	98.4	4	19.0
40	48.4	155.6	73.0	20.6	68.3	30.2	114.3	4	19.0
50	60.3	165.1	92.1	22.2	69.8	33.3	127.0	8	19.0
65	73.0	190.5	104.8	25.4	76.2	38.1	149.2	8	22.2
80	88.9	209.5	127.0	28.6	79.4	42.9	168.3	8	22.2
90	101.6	228.6	139.7	30.2	81.0	44.4	184.1	8	22.2
100	114.3	254.0	157.2	31.7	85.7	47.6	200.0	8	22.2
125	141.3	279.4	185.7	34.9	98.4	50.8	234.9	8	22.2
150	165.1	317.5	215.9	36.5	98.4	52.4	269.9	12	22.2
	168.3	317.5	215.9	36.5	98.4	52.4	269.9	12	22.2
200	219.1	381.0	269.9	41.3	111.1	61.9	330.2	12	25.4
250	273.1	444.5	323.8	47.6	117.5	66.7	387.3	16	28.6
300	323.9	520.7	381.0	50.8	130.2	73.0	450.8	16	31.7
350	355.6	584.2	412.7	54.0	142.9	76.2	514.3	20	31.7
400	406.4	647.7	469.9	57.1	146.0	82.5	571.5	20	34.9
450	457.2	711.2	533.4	60.3	158.7	88.9	628.6	24	34.9
500	508.0	774.7	584.2	63.5	161.9	95.2	685.8	24	34.9
600	609.6	914.4	692.1	69.8	168.3	106.4	812.8	24	41.3

Approximate Mass (kg)

Nominal Bore mm	Weld Neck	Socket Weld Slip-on Screwed	Blind
15	0.91	0.73	0.76
20	1.41	1.25	1.13
25	1.81	1.36	1.77
32	2.27	2.04	2.68
40	3.06	2.81	2.83
50	3.74	3.13	3.52
65	5.56	4.54	5.44
80	7.37	6.12	7.26
90	9.53	7.71	9.98
100	11.79	9.53	11.79
125	15.42	12.70	15.88
150	19.96	16.33	20.87
200	32.21	25.40	38.10
250	44.00	35.38	55.34
300	64.41	50.80	86.18
350	84.37	74.39	107.05
400	111.58	101.60	145.15
450	138.35	126.10	181.89
500	174.63	149.69	231.33
600	247.21	222.26	342.92

600lb Flange

Length through Hub Y

Nominal Bore	Pipe OD A	Flange dia. B	Raised Face dia. D	Flange Thickness T	Welding Neck	Slip-on Screwed Socket-weld	Bolt PCD	No. of Bolts	Bolt Hole dia.
15	21.4	95.2	34.9	14.3	52.4	22.2	66.7	4	15.9
20	27.0	117.5	42.9	15.9	57.1	25.4	82.5	4	19.0
25	34.1	123.8	50.8	17.5	61.9	27.0	88.9	4	19.0
32	42.9	133.3	63.5	20.6	66.7	28.6	98.4	4	19.0
40	48.4	155.6	73.0	22.2	69.8	31.7	114.3	4	19.0
50	60.3	165.1	92.1	25.4	73.0	36.5	127.0	8	19.0
65	73.0	190.5	104.8	28.6	79.4	41.3	149.2	8	22.2
80	88.9	209.5	127.0	31.7	82.5	46.0	168.3	8	22.2
90	101.6	228.6	139.7	34.9	85.7	49.2	184.1	8	25.4
100	114.3	273.0	157.2	38.1	101.6	54.0	215.9	8	25.4
125	141.3	330.2	185.7	44.4	114.3	60.3	266.7	8	28.6
150	165.1	355.6	215.9	47.6	117.5	66.7	292.1	12	28.6
	168.3	355.6	215.9	47.6	117.5	66.7	292.1	12	28.6
200	219.1	419.1	269.9	55.6	133.3	76.2	349.2	12	31.7
250	273.1	508.0	323.8	63.5	152.4	85.7	431.8	16	34.9
300	323.9	558.8	381.0	66.7	155.6	92.1	488.9	20	34.9
350	355.6	603.2	412.7	69.8	165.1	93.7	527.0	20	38.1
400	406.4	685.8	469.9	76.2	177.8	106.4	603.2	20	41.3
450	457.2	742.9	533.4	82.5	184.1	117.5	654.0	20	44.4
500	508	812.8	584.2	88.9	190.5	127.0	723.9	24	44.4
600	609.6	939.8	692.1	101.6	203.2	139.7	838.2	24	50.8

Approximate Mass (kg)

Nominal Bore mm	Weld Neck	Socket Weld Slip-on Screwed	Blind
15	0.91	0.82	0.91
20	1.59	1.47	1.36
25	1.86	1.70	1.95
32	2.72	2.18	2.72
40	3.74	3.36	3.74
50	4.65	3.97	4.31
65	6.44	5.49	6.53
80	8.50	6.80	8.62
90	12.25	9.93	13.15
100	17.24	15.42	18.14
125	30.84	29.03	30.84
150	34.02	34.02	37.19
200	52.16	45.36	63.05
250	90.36	79.83	108.86
300	101.60	97.52	133.81
350	157.40	117.93	171.46
400	209.11	166.01	239.04
450	217.27	215.46	301.64
500	312.98	277.60	387.82
600	443.16	370.13	521.63

 

Tolerances of ASA 150, 300 amd 600 Flanges to ANSI B 16.5 : 1968

Inside Diameter	250 mm and under	+ 0.8
		– 0
	300 mm and under	+ 1.6
		– 0
Outside Diameter	600 mm and under	± 1.6
Thickness	450 mm and under	+ 3.2
		– 0
	500 mm and over	+ 4.8
		– 0
Spot Facing	Spot facing on the back of the flange shall be parallel to the flange face within	± 1°
Outside Diameter of Hub	300 mm and smaller	+ 2.4
		– 1.6
	300 mm and over	± 3.2
Total Depth	450 mm and smaller	+ 3.2
		– 0.8
	450 mm amd over	+ 4.8
		– 1.6
Drilling	Bolt Circle	± 1.6
	Bolt Spacing	± 0.8
Chamfer Angel	All Sizes	± 2.5°

Carbon Steel Flanges for Oil, Gas and Petro-chemical industries to ANSI B 16.5 and BS 1560 A105 Normalised.

Flange Specifications

15mm – 32mm

40mm – 80mm

100mm – 200mm 

250mm – 400mm