Weld Neck Flange Class 300 Dimensions

Size in Inch	Size in mm	Outer Diameter	Flange Thickness	Hub OD	Weld Neck OD	Welding Neck Length	Bore	RF Diameter	RF Height	PCD	Weld Face
		A	B	C	D	E	F	G	H	I	J
1/2	15	95	12.7	38	21.3	51	Welding Neck bore is derived from the pipe schedule	34.9	2	66.7	1.6
3/4	20	115	14.3	48	26.7	56		42.9	2	82.6	1.6
1	25	125	15.9	54	33.4	60		50.8	2	88.9	1.6
1 1/4	32	135	17.5	64	42.2	64		63.5	2	98.4	1.6
1 1/2	40	155	19.1	70	48.3	67		73	2	114.3	1.6
2	50	165	20.7	84	60.3	68		92.1	2	127	1.6
2 1/2	65	190	23.9	100	73	75		104.8	2	149.2	1.6
3	80	210	27	117	88.9	78		127	2	168.3	1.6
3 1/2	90	230	28.6	133	101.6	79		139.7	2	184.2	1.6
4	100	255	30.2	146	114.3	84		157.2	2	200	1.6
5	125	280	33.4	178	141.3	97		185.7	2	235	1.6
6	150	320	35	206	168.3	97		215.9	2	269.9	1.6
8	200	380	39.7	260	219.1	110		269.9	2	330.2	1.6
10	250	445	46.1	321	273	116		323.8	2	387.4	1.6
12	300	520	49.3	375	323.8	129		381	2	450.8	1.6
14	350	585	52.4	425	355.6	141		412.8	2	514.4	1.6
16	400	650	55.6	483	406.4	144		469.9	2	571.5	1.6
18	450	710	58.8	533	457	157		533.4	2	628.6	1.6
20	500	775	62	587	508	160		584.2	2	685.8	1.6
24	600	915	68.3	702	610	167		692.2	2	812.8	1.6

Weld Neck Flange Class 300 Stud & Bolt Dimensions
Size in Inch	Size in mm	No of Bolts	Bolt Size UNC	Machine Bolt Length	RF Stud Length	Hole Size	ISO Stud Size	Weight in kg
1/2	15	4	1/2	55	65	5/8	M14	1.4
3/4	20	4	5/8	65	75	3/4	M16	1.4
1	25	4	5/8	65	75	3/4	M16	1.8
1 1/4	32	4	5/8	70	85	3/4	M16	2.3
1 1/2	40	4	3/4	75	90	7/8	M20	3.2
2	50	8	5/8	75	90	3/4	M16	4.1
2 1/2	65	8	3/4	85	100	7/8	M20	5.5
3	80	8	3/4	90	110	7/8	M20	6.8
3 1/2	90	8	3/4	95	110	7/8	M20	8.2
4	100	8	3/4	95	115	7/8	M20	11.4
5	125	8	3/4	110	120	7/8	M20	14.6
6	150	12	3/4	110	120	7/8	M20	19.1
8	200	12	7/8	120	140	1	M24	31
10	250	16	1	140	160	1 1/8	M27	42
12	300	16	1 1/8	145	170	1 1/4	M30	64
14	350	20	1 1/8	160	180	1 1/4	M30	82
16	400	20	1 1/4	165	190	1 3/8	M33	113
18	450	24	1 1/4	170	195	1 3/8	M33	145
20	500	24	1 1/4	185	205	1 3/8	M33	182
24	600	24	1 1/2	205	230	1 5/8	M39	264