ASME B16.5 Class 2500 Threaded Flange

Technical Drawing

Dimensions of 2500# Threaded Flanges

NPS	D	G	X	K
1/2	135	34.9	43	88.9
3/4	140	42.9	51	95.2
1	160	50.8	57	108.0
1-1/4	185	63.5	73	130.2
1-1/2	205	73.0	79	146.0
2	235	92.1	95	171.4
2-1/2	265	104.8	114	196.8

*D: outside diameter of flange; K: diameter of bolt circle; G: outside diameter of raised face; X: diameter of hub at base; For all  threaded flanges of class 2500, t (height of raused face)=7mm. All units are mm.

NPS	h	Q	Y	T
1/2	29	23.6	40	30.2
3/4	32	29.0	43	31.8
1	35	35.8	48	35.0
1-1/4	39	44.4	52	38.1
1-1/2	45	50.6	60	44.5
2	51	63.5	70	50.9
2-1/2	58	76.2	79	57.2

*h: minimum thread length; Q:minimum diameter of counterbore; Y: length through hub;  T: minimum thickness of flange; All units are mm.

NPS	n	d	l	L	Mass
1/2	4	7/8	3/4	120	2.95
3/4	4	7/8	3/4	125	3.44
1	4	1	7/8	140	4.82
1-1/4	4	1-1/8	1	150	7.14
1-1/2	4	1-1/4	1-1/8	170	10.0
2	8	1-1/8	1	180	14.8
2-1/2	8	1-1/4	1-1/8	195	21.5

*n: number of bolts; d: diameter of bolt holes; l: diameter of bolts; L: length of stud bolts for 7 mm raised face; Mass: approximate weights/masses of the flange; All units are mm except that d and l are provided in inch, the weights are in kg.

ASME B16.5 Threaded Flange, Classes
150#	300#	400#	600#
900#	1500#	2500#	-

*Click to view the dimensions and weights of threaded flanges of each pressure rating.