Orifice Flanges ASME/ANSI B16.36 Flange Dimensions & Standards

		CLASS 300		CLASS 600		CLASS 900		CLASS 1500		CLASS 2500
NOMINAL PIPE SIZE		THICKNESS MIN	LENGTH THRU HUB W/NECK	THICKNESS MIN	LENGTH THRU HUB W/NECK	THICKNESS MIN	LENGTH THRU HUB W/NECK	THICKNESS MIN	LENGTH THRU HUB W/NECK	THICKNESS MIN	LENGTH THRU HUB W/NECK	NOMINAL PIPE SIZE
MM	INCH	T	LTB	T	LTB	T	LTB	T	LTB	T	LTB	MM	INCH
25	1	36.6	83	36.6	83	38.1	90	38.1	90	38.1	99	25	1
40	1 1/2	36.6	86	36.6	86	38.1	96	38.1	96	44.5	118	40	1 1/2
50	2	36.6	86	36.6	86	38.1	109	38.1	109	50.8	134	50	2
65	2 1/2	36.6	89	36.6	89	41.3	112	41.3	112	57.2	150	65	2 1/2
80	3	36.6	89	36.6	89	39.1	109	47.7	124	66.7	175	80	3
100	4	36.6	92	38.1	109	44.5	124	54	131	76.2	197	100	4
150	6	36.6	100	47.8	124	55.6	147	82.6	178	108	280	150	6
200	8	39.7	112	55.6	140	63.5	169	92.1	220	127	325	200	8
250	10	46.1	118	63.5	159	69.9	191	108	261	165.1	426	250	10
300	12	49.3	131	66.5	163	73.2	207	123.9	290	184	471	300	12
350	14	52.4	143	69.9	172	85.9	220	133.4	305			350	14
400	16	55.6	146	76.2	185	88.9	223	146.1	318			400	16
450	18	58.8	159	82.6	191	101.6	236	162	334			450	18
500	20	62	162	88.9	197	108	255	177.8	363			500	20
600	24	68.3	169	101.6	210	139.7	299	203.2	413			600	24

NOTES:

(1) AN ORIFICE FLANGE SET INCLUDES:

2 X FLANGES, 2 X JACK BOLTS, 2 X 1/2" NPT HEX HEAD PLUGS AND 2 X PLASTIC CAPS FITTED IN THE TAPPED HOLES

(1) RING JOINT FLANGES MAY HAVE SPECIAL SIDE TAPPINGS.

(5) BORE TO BE SPECIFIED BY PURCHASER.

(6) JACK BOLT HOLES CAN BE SUPPLIED WITH TAPPED HOLES OR MILLED NUT SLOT.

(5) TAPPING BORE SIZES: 65NB & LESS 5.4MM, 80NB 9.5MM, 100NB & OVER 12.7MM

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Orifice Flanges ASME/ANSI B16.36