ANSI B16.5 Class 1500 Lap Joint Flanges

Nominal Pipe Size	Outside Diameter (O)	Thickness (T)	Length Thru Hub (Y)	Hub Diameter (X)	Radius (r)	Bore (B)	Approximate Weight	Bolt Circle (C)	Number of Holes	Diameter of Holes
1/2	4.75 mm	0.88 mm	1.25 mm	1.50 mm	0.13 mm	0.90 mm	4 lb	3.25 mm	4	0.88 mm
3/4	5.13 mm	1.00 mm	1.38 mm	1.75 mm	0.13 mm	1.11 mm	5 lb	3.50 mm	4	0.88 mm
1	5.88 mm	1.13 mm	1.63 mm	2.06 mm	0.13 mm	1.38 mm	8 lb	4.00 mm	4	1.00 mm
1 1/4	6.25 mm	1.13 mm	1.63 mm	2.50 mm	0.19 mm	1.72 mm	9 lb	4.38 mm	4	1.00 mm
1 1/2	7.00 mm	1.25 mm	1.75 mm	2.75 mm	0.25 mm	1.97 mm	12 lb	4.88 mm	4	1.13 mm
2	8.50 mm	1.50 mm	2.25 mm	4.13 mm	0.31 mm	2.46 mm	25 lb	6.50 mm	8	1.00 mm
2 1/2	9.63 mm	1.63 mm	2.50 mm	4.88 mm	0.31 mm	2.97 mm	35 lb	7.50 mm	8	1.13 mm
3	10.50 mm	1.88 mm	2.88 mm	5.25 mm	0.38 mm	3.60 mm	47 lb	8.00 mm	8	1.25 mm
4	12.25 mm	2.13 mm	3.56 mm	6.38 mm	0.38 mm	4.60 mm	75 lb	9.50 mm	8	1.38 mm
5	14.75 mm	2.88 mm	4.13 mm	7.75 mm	0.44 mm	5.69 mm	140 lb	11.50 mm	8	1.63 mm
6	15.50 mm	3.25 mm	4.69 mm	9.00 mm	0.44 mm	6.75 mm	170 lb	12.50 mm	12	1.50 mm
8	19.00 mm	3.63 mm	5.63 mm	11.50 mm	0.50 mm	8.75 mm	285 lb	15.50 mm	12	1.75 mm
10	23.00 mm	4.25 mm	7.00 mm	14.50 mm	0.50 mm	10.92 mm	485 lb	19.00 mm	12	2.00 mm
12	26.50 mm	4.88 mm	8.63 mm	17.75 mm	0.50 mm	12.92 mm	630 lb	22.50 mm	16	2.13 mm
14	29.50 mm	5.25 mm	9.50 mm	19.50 mm	0.50 mm	14.18 mm	890 lb	25.00 mm	16	2.38 mm
16	32.50 mm	5.75 mm	10.25 mm	21.75 mm	0.50 mm	16.19 mm	1150 lb	27.75 mm	16	2.63 mm
18	36.00 mm	6.38 mm	10.88 mm	23.50 mm	0.50 mm	18.20 mm	1475 lb	30.50 mm	16	2.88 mm
20	38.75 mm	7.00 mm	11.50 mm	25.25 mm	0.50 mm	20.25 mm	1775 lb	32.75 mm	16	3.13 mm
24	46.00 mm	8.00 mm	13.00 mm	30.00 mm	0.50 mm	24.25 mm	2825 lb	39.00 mm	16	3.63 mm

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