B16.36-Welding Neck Orifice Flanges – Class 1500

Welding Neck Orifice Flanges

Class 1500

	Nom. size	O	C	R	X	A	A	TT	No. of holes	Diam. of holes	Diam. of bolts	Diam. of bolt circle	Groove #
		O	C	R	X	A	Y	TT
in.	1″	5.88	1.5	2	2.06	1.32	3.25	1/04/07	4	1	7/8″	4	R16
mm.		149.4	38.1	50.8	52.3	33.5	82.6	6.4		25.4	22.2	101.6
in.	1 1/2″	7	1.5	2.88	2.75	1.9	3.5	1/04/07	4	1.12	1″	4.88	R20
mm.		177.8	38.1	73.2	69.9	48.3	88.9	6.4		28.4	25.4	124
in.	2″	8.5	1.5	3.62	4.12	2.38	4	1/04/07	8	1	7/8″	6.5	R24
mm.		215.9	38.1	91.9	104.6	60.5	101.6	6.4		25.4	22.2	165.1
in.	2 1/2″	9.62	1.62	4.12	4.88	2.88	4.12	1/04/07	8	1.12	1″	7.5	R27
mm.		244.3	41.1	104.6	124	73.2	104.6	6.4		28.4	25.4	190.5
in.	3″	10.5	1.88	5	5.25	3.5	4.62	3/08/07	8	1.25	1 1/8″	8	R35
mm.		266.7	47.8	127	133.4	88.9	117.3	9.5		31.8	28.6	203.2
in.	4″	12.25	2.12	6.19	6.38	4.5	4.88	1/02/07	8	1.38	1 1/4″	9.5	R39
mm.		311.2	53.8	157.2	162.1	114.3	124	12.7		35.1	31.8	241.3
in.	6″	15.5	3.25	8.5	9	6.63	6.75	1/02/07	12	1.5	1 3/8″	12.5	R46
mm.		393.7	82.6	215.9	228.6	168.4	171.5	12.7		38.1	34.9	317.5
in.	8″	19	3.62	10.62	11.5	8.63	8.38	1/02/07	12	1.75	1 5/8″	15.5
mm.		482.6	91.9	269.7	292.1	219.2	212.9	12.7		44.5	41.3	393.7
in.	10″	23	4.25	12.75	14.5	10.75	10	1/02/07	12	2	1 7/8″	19
mm.		584.2	108	323.9	368.3	273.1	254	12.7		50.8	47.6	482.6
in.	12″	26.5	4.88	15	17.75	12.75	11.12	1/02/07	16	2.12	2″	22.5
mm.		673.1	124	381	450.9	323.9	282.4	12.7		53.8	50.8	571.5
in.	14″	29.5	5.25	16.25	19.5	14	11.75	1/02/07	16	2.38	2 1/4″	25
mm.		749.3	133.4	412.8	495.3	355.6	298.5	12.7		60.5	57.2	635
in.	16″	32.5	5.75	18.5	21.75	16	12.25	1/02/07	16	2.6	2 1/2″	27.8
mm.		825.5	146.1	469.9	552.5	406.4	311.2	12.7		66.5	63.5	704.9
in.	18″	36	6.38	21	23.5	18	12.88	1/02/07	16	2.88	2 3/4″	30.5
mm.		914.4	162.1	533.4	596.9	457.2	327.2	12.7		73.2	69.9	774.7
in.	20″	38.75	7	23	25.25	20	14	1/02/07	16	3.12	3″	32.75
mm.		984.3	177.8	584.2	641.4	508	355.6	12.7		79.2	76.2	831.9
in.	24″	46	8	27.25	30	24	16	1/02/07	16	3.62	3 1/2″	39
mm.		1168.4	203.2	692.2	762	609.6	406.4	12.7		91.9	88.9	990.6