SLIP ON FLANGES ASME B16.5 Class 400

Nominal Size NPS		Outside Diameter of Flange	Thickness of Flange	Diameter of Raised Face	Diameter Of Hub At Base	Diameter of Hub at Point of Welding	Length thru Hub	Number of Bolt Holes	Diameter of Bolt Holes	Diameter of Bolts	Diameter of Bolt Circle	Approx. Weight Pounds Kg
Nominal Size NPS		O	C	R	X	A	Y	Number of Bolt Holes	Diameter of Bolt Holes	Diameter of Bolts	Diameter of Bolt Circle	Approx. Weight Pounds Kg
½
¾
1
1 ¼
1 ½			Size ½ thru 3 ½ are identical to Class 600
2
2 ½
3	in.
3 ½	mm
4	in.	10.00	1.38	6.19	5.75	2.00	4.57	8	1.00	7/8	7.88	26
	mm	254.00	35.10	157.20	146.10	50.80	116.10		25.40	22.2	200.20	12
5	in.	11.00	1.50	7.31	7.00	2.12	5.66	8	1.00	7/8	9.25	31
	mm	279.40	38.10	185.70	177.80	53.80	143.80		25.40	22.2	235.00	14
6	in.	12.50	1.62	8.50	8.12	2.25	6.72	12	1.00	7/8	10.62	44
	mm	317.50	41.10	215.90	206.20	57.20	170.70		25.40	22.2	269.70	20
8	in.	15.00	1.88	10.62	10.25	2.69	8.72	12	1.12	1	13.00	67
	mm	381.00	47.80	269.70	260.40	68.30	221.50		28.40	25.4	330.20	30
10	in.	17.50	2.12	12.75	12.62	2.88	10.88	16	1.25	1 1/8	15.25	91
	mm	444.50	53.80	323.90	320.50	73.20	276.40		31.80	28.6	387.40	41
12	in.	20.50	2.25	15.00	14.75	3.12	12.88	16	1.38	1 ¼	17.75	130
	mm	520.70	57.20	381.00	374.70	79.20	327.20		35.10	31.8	450.90	59
14	in.	23.00	2.38	16.25	16.75	3.31	14.14	20	1.38	1 ¼	20.25	180
	mm	584.20	60.50	412.80	425.50	84.10	359.20		35.10	31.8	514.40	82
16	in.	25.50	2.50	18.50	19.00	3.69	16.16	20	1.50	1 3/8	22.50	235
	mm	647.70	63.50	469.90	482.60	93.70	410.50		38.10	34.9	571.50	107
18	in.	28.00	2.62	21.00	21.00	3.88	18.18	24	1.50	1 3/8	24.75	285
	mm	711.20	66.50	533.40	533.40	98.60	461.80		38.10	34.9	628.70	129
20	in.	30.50	2.75	23.00	23.12	4.00	20.20	24	1.62	1 ½	27.00	345
	mm	774.70	69.90	584.20	587.20	101.60	513.10		41.10	38.1	685.80	156
24	in.	36.00	3.00	27.25	27.62	4.50	24.25	24	1.88	1 3/4	32.00	510
	mm	914.40	76.20	692.20	701.50	114.30	616.00		47.80	44.5	812.80	231