ASME B16.5 Class 300 Socket Welding Flange

Technical Drawing

Dimensions of 300# SW Flanges

NPS	D	G	X	K
1/2	95	34.9	38	66.7
3/4	115	42.9	48	82.6
1	125	50.8	54	88.9
1-1/4	135	63.5	64	98.4
1-1/2	155	73.0	70	114.3
2	165	92.1	84	127.0
2-1/2	190	104.8	100	149.2
3	210	127.0	117	168.3

*D: outside diameter of flange; G: outside diameter of raised face; X: diameter of hub at base; K: diameter of bolt circle; For all  socket welding flanges of class 300, t (height of raused face)=2mm. All units are mm.

NPS	B	J	D	Y
1/2	15.8	22.2	10	21
3/4	20.9	27.7	11	24
1	26.6	34.5	13	25
1-1/4	35.1	43.2	14	25
1-1/2	40.9	49.5	16	29
2	52.5	61.9	17	32
2-1/2	62.7	74.6	19	37
3	77.9	90.7	21	41

*B: bore diameter of 300# SW flange, which is equal to that of a welding neck flange of same size or corresponds to the inside diameter of pipe as given in ASME B36.10 for standard wall pipe unless otherwise specified by purchaser; J:bore diameter of the socket; D: depth of socket; Y: length through hub; All units are mm.

NPS	n	d	l	L	T
1/2	4	5/8	1/2	65	12.7
3/4	4	3/4	5/8	75	14.3
1	4	3/4	5/8	75	15.9
1-1/4	4	3/4	5/8	85	17.5
1-1/2	4	7/8	3/4	90	19.1
2	8	3/4	5/8	90	20.7
2-1/2	8	7/8	3/4	100	23.9
3	8	7/8	3/4	110	27.0

* n: number of bolts; d: diameter of bolt holes; l: diameter of bolts;  T: minimum thickness of flange ; L: length of stud bolts for 2 mm raised face; All units are mm except that d and l are provided in inch.

ASME B16.5 Socket Welding Flanges (Class)
150#	300#	600#	1500#

*Click to view the dimensions and weights of socket-welding flanges of each pressure rating.