300 Class Series A Weldneck Flanges Dimension

asme 300 dimension welding neck dimension

Dimensions for Welding Neck Flanges 300 Class, Series A

300 lb/sq. in

Weld Neck flanges as per ASME B16.47/ANSI B16.47 300#/300 LBS in mm

Pipe		Flange				Hub		Raised face	Drilling Template			Approx Weight
Nom.	OD	D	J	b	h	a	m	g	Number	I	k
Size	mm	mm	mm	mm	mm	mm	mm	mm		mm	mm	Killo
26''	660.4	971.5	To be	79.4	184.1	To be	720.7	749.3	28	44.4	876.3	Wts.
28"	711.2	1035.0	specified by	85.7	196.8	specified by	774.7	800.1	28	44.4	839.8	on
30"	762.0	1092.2	purchaser	92.1	209.5	purchaser	827.1	857.2	28	47.6	996.9	Application
32"	812.8	1149.3		98.4	222.2		881.1	914.4	28	50.8	1054.1
34"	863.6	1206.5		101.6	231.8		936.6	965.2	28	50.8	1104.9
36"	914.4	1270.0		104.8	214.3		990.6	1022.3	32	54	1168.4
38"	965.2	1168.4		107.9	180.9		993.7	1028.7	32	41.2	1092.2
40"	1016.0	1238.2		114.3	193.6		1047.7	1073.1	32	44.4	1155.7
42"	1066.8	1289.0		119.1	200.1		1098.5	1123.9	32	44.4	1206.5
44"	1117.6	1352.5		123.9	206.3		1149.3	1193.8	32	47.6	1263.6
46"	1168.4	1416.0		128.5	215.9		1203.4	1244.6	32	50.8	1320.8
48"	1219.2	1466.8		133.4	222.9		1254.1	1301.7	32	50.8	1371.6
50"	1270.0	1530.3		139.7	231.7		1304.9	1358.9	32	53.9	1428.7
52"	1320.8	1581.1		144.5	238.1		1355.7	1409.7	32	53.9	1479.5
54"	1371.6	1657.3		152.4	252.4		1409.7	1466.8	28	60.3	1549.4
56"	1422.4	1708.1		153.9	260.3		1463.6	1517.6	28	60.3	1600.2
58"	1473.2	1758.9		158.7	266.7		1514.4	1574.8	32	60.3	1651.0
60"	1524.0	1809.7		163.5	273.0		1565.2	1625.6	32	60.3	1701.8

Weld Neck flanges as per ASME B16.47/ANSI B16.47 300#/300 LBS in inches

Pipe		Flange				Hub		Raised face	Drilling Template			Approx Weight
Nom.	OD	D	J	b	h	a	m	g	Number	I	k
Size	in.	in.	in.	in.	in.	in.	in.	in.		in.	in.	Pounds
26''	26.0	38^1/4	To be by	3^1/8	7^1/4	To be	28^3/8	29^1/2	28	1^3/4	34^1/2	Wts. on Application
28"	28.0	40^3/4	specified	3^1/8	7^3/4	specified by	30^1/2	31^1/2	28	1^3/4	37
30"	30.0	43	purchaser	3^5/8	8^1/4	purchaser	32^9/16	33^3/4	28	1^7/8	39^1/4
32"	32.0	45^1/4		3^7/8	8^3/4		34^11/16	36	28	2	41^1/2
34"	34.0	47^1/2		4	9^1/8		36^7/8	38	28	2	43^1/2
36"	36.0	50		4^1/8	9^1/2		39	40^1/4	32	2^1/8	46
38"	38.0	46		4^1/4	7^1/8		39^1/8	40^1/2	32	1^5/8	43
40"	40.0	48^3/4		4^1/2	7^5/8		41^1/4	42^3/4	32	1^3/4	45^1/2
42"	42.0	50^3/4		4^11/16	7^7/8		43^1/4	44^3/4	32	1^3/4	47^1/2
44"	44.0	53^1/4		4^7/8	8^1/8		45^1/4	47	32	1^7/8	49^3/4
46"	46.0	55^3/4		5^1/16	8^1/12		47^3/8	49	28	2	52
48"	48.0	57^3/4		5^1/4	8^13/16		49^3/8	51^1/4	32	2	54
50"	50.0	60^1/4		5^1/2	9^1/8		51^3/8	53^1/2	32	2^1/8	56^1/4
52"	52.0	62^1/4		5^11/16	9^3/8		53^5/8	55^1/2	32	2^1/8	58^1/4
54"	54.0	65^1/4		6	9^15/16		55^1/2	57^3/4	28	2^3/8	61
56"	56.0	67^1/4		6^1/16	10^1/4		57^7/8	59^3/4	28	2^3/8	63
58"	58.0	69^1/4		6^1/4	10^1/2		59^5/8	62	32	2^3/8	65
60"	60.0	71^1/4		6^7/16	10^3/4		61^5/8	64	32	2^3/8	67

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