ASME/ANSI B16.5 Class 300 SO

Pipe flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification.

The Slip-on flange has a low hub because the pipe slips into the flange prior to welding. It is welded both inside and out to provide sufficient strength and prevent leakage.Slip-on flanges are all bored slightly larger than the O.D. of the pipe.

Nominal Pipe Size	Outside Diameter of Flange	Diameter of Raised Face	Thickness of Flanges Min.	Diameter of Hub	Length Through Hub	Bore	Diameter of Bolt Circle	Diameter of Bolt Holes	Number of Bolts	Approxi-mate Weight kgs
NPS	O	R	tf	X	Y	B	W	I	n
1/2	95	34.9	12.7	38	21	22.2	66.7	15.9	4	0.65
3/4	115	42.9	14.3	48	24	27.7	82.6	19.1	4	1.08
1	125	50.8	15.9	54	25	34.5	88.9	19.1	4	1.39
1 1/4	135	63.5	17.5	64	25	43.2	98.4	19.1	4	1.74
1 1/2	155	73.0	19.1	70	29	49.5	114.3	22.2	4	2.49
2	165	92.1	20.7	84	32	61.9	127.0	19.1	8	2.90
2 1/2	190	104.8	23.9	100	37	74.6	149.2	22.2	8	4.35
3	210	127.0	27.0	117	41	90.7	168.3	22.2	8	5.89
3 1/2	230	139.7	28.6	133	43	103.4	184.2	22.2	8	7.48
4	255	157.2	30.2	146	46	116.1	200.0	22.2	8	9.77
5	280	185.7	33.4	178	49	143.8	235.0	22.2	8	12.31
6	320	215.9	35.0	206	51	170.7	269.9	22.2	12	16.07
8	380	269.9	39.7	260	60	221.5	330.2	25.4	12	24.07
10	445	323.8	46.1	321	65	276.2	387.4	28.6	16	34.38
12	520	381.0	49.3	375	71	327.0	450.8	31.8	16	49.80
14	585	412.8	52.4	425	75	359.2	514.4	31.8	20	70.12
16	650	469.9	55.6	483	81	410.5	571.5	34.9	20	89.56
18	710	533.4	58.8	533	87	461.8	628.6	34.9	24	108.10
20	775	584.2	62.0	587	94	513.1	685.8	34.9	24	134.87
24	915	692.2	68.3	702	105	616.0	812.8	41.3	24	202.58

Note: 2 mm raised face regularly furnished on Classes 150 and 300 unless otherwise ordered.

Nominal Pipe Size	Outside Diameter of Flange	Diameter of Raised Face	Thickness of Flanges Min.	Diameter of Hub	Length Through Hub	Bore	Diameter of Bolt Circle	Diameter of Bolt Holes	Number of Bolts	Approximate Weight kgs
NPS	O	R	tf	X	Y	B	W	I	n
1/2	90	34.9	9.6	30	14	22.2	60.3	15.9	4	0.41
3/4	100	42.9	11.2	38	14	27.7	69.9	15.9	4	0.59
1	110	50.8	12.7	49	16	34.5	79.4	15.9	4	0.82
1 1/4	115	63.5	14.3	59	19	43.2	88.9	15.9	4	0.99
1 1/2	125	73.0	15.9	65	21	49.5	98.4	15.9	4	1.28
2	150	92.1	17.5	78	24	61.9	120.7	19.1	4	2.01
2 1/2	180	104.8	20.7	90	27	74.6	139.7	19.1	4	3.41
3	190	127.0	22.3	108	29	90.7	152.4	19.1	4	3.88
3 1/2	215	139.7	22.3	122	30	103.4	177.8	19.1	8	4.80
4	230	157.2	22.3	135	32	116.1	190.5	19.1	8	5.45
5	255	185.7	22.3	164	35	143.8	215.9	22.2	8	6.22
6	280	215.9	23.9	192	38	170.7	241.3	22.2	8	7.57
8	345	269.9	27.0	246	43	221.5	298.5	22.2	8	12.42
10	405	323.8	28.6	305	48	276.2	362.0	25.4	12	16.47
12	485	381.0	30.2	365	54	327.0	431.8	25.4	12	26.80
14	535	412.8	33.4	400	56	359.2	476.3	28.6	12	35.21
16	595	469.9	35.0	457	62	410.5	539.8	28.6	16	44.61
18	635	533.4	38.1	505	67	461.8	577.9	31.8	16	49.19
20	700	584.2	41.3	559	71	513.1	635.0	31.8	20	62.62
24	815	692.2	46.1	663	81	616.0	749.3	34.9	20	88.23