American Flange Standards
ASME B16.36 2006 orifice flange and plates specifications cover nominal pipe sizes from 25mm (1") to 600mm (24"). The table includes specifications for Class 300 through Class 2500 pressure ratings. Flange thicknesses range from 36.6mm to 203.2mm, with weld neck hub lengths from 83mm to 471mm. These orifice flanges are specifically designed for flow measurement applications with pressure tapping points for differential pressure instruments.
| CL 300 | CL 600 | CL 900 | CL 1500 | CL 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
