ASME/ANSI B16.5 Class 1500 SW

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 socket welding flange is similar to a slip-on flange except it has a bore and a counterbore dimension. 

Nominal Pipe Size	Outside Diameter of Flange	Diameter of Raised Face	Thickness of Flanges Min.	Diameter of Hub	Length Through Hub	Bore		Depth of Socket	Diameter of Bolt Circle	Diameter of Bolt Holes	Number of Bolts	Approxi-mate Weight kgs
NPS	O	R	tf	X	Y	B1	B2 STD	D	W
1/2	120	34.9	22.3	38	32	22.2	32.0	10	82.6	22.2	4	1.63
3/4	130	42.9	25.4	44	35	27.7	35.0	11	88.9	22.2	4	2.25
1	150	50.8	28.6	52	41	34.5	41.0	13	101.6	25.4	4	3.37
1 1/4	160	63.5	28.6	64	41	43.2	41.0	14	111.1	25.4	4	4.04
1 1/2	180	73.0	31.8	70	44	49.5	44.0	16	123.8	28.6	4	5.66
2	215	92.1	38.1	105	57	61.9	57.0	17	165.1	25.4	8	9.96
2 1/2	245	104.8	41.3	124	64	74.6	64.0	19	190.5	28.6	8	14.29