300 LB. FLANGES

Normal pipe size	Outside dia. of flange	Minimum thickness of flange	Overall Length			Bolt Circle	No. and Size of Holes		O.D. of raised face
			Welding neck	Slip-on & socket welding	Lap Joint
	O	Q	Y			Diam.	No.	dia.	R
1/2	95	14.2	52.3	22.4	22.4	66.5	4	15.7	35.1
3/4	117	15.7	57.2	25.4	25.4	82.6	4	19.1	42.9
1	124	17.5	62	26.9	26.9	88.9	4	19.1	50.8
1-1/4	133	19.1	65	26.9	26.9	98.6	4	19.1	63.5
1-1/2	155	20.6	68	30.2	30.2	114.3	4	22.4	73.2
2	165	22.4	69.9	33.3	33.3	127.0	8	19.1	91.9
2-1/2	191	25.4	76.2	38.1	38.1	149.4	8	22.4	104.6
3	210	28.6	79.2	42.9	42.9	168.1	8	22.4	127
3.1/2	229	30.2	81	44.5	44.5	184.2	8	22.4	139.7
4	254	31.8	85.9	47.6	47.8	200.2	8	22.4	157.2
5	279	35.0	98.6	50.8	50.8	235.0	8	22.4	185.7
6	318	36.6	98.6	52.3	52.3	269.7	12	22.4	215.9
8	381	41.1	111.3	62	62	330.2	12	25.4	269.7
10	445	47.8	117.3	66.5	95.3	387.4	16	28.4	323.9
12	521	50.8	130	73.2	101.6	450.9	16	31.8	381
14	584	53.8	142.7	76.2	111.3	514.4	20	31.8	412.8
16	648	57.2	146.1	82.6	120.7	571.5	20	35.1	469.9
18	711	60.5	158.8	88.9	130.2	628.7	24	35.1	533.4
20	775	63.5	162.1	95.3	139.7	685.8	24	35.1	584.2
24	914	69.9	168.1	106.4	152.4	812.8	24	41.1	692.2