Emerson Rosemount 1595, Справочное руководство

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Reference Manual
00809-0100-4828, Rev EA
November 2007
A-3
Rosemount 1595
Typical Orifice Hole Sizes
Beta is calculated by: (
β
) = d
C
/ Pipe ID, where the calculated bore is equal to 2 x
typical orifice hole size (d
C
= 2d). The table below shows the diameter of each of
the four typical orifice holes.
Orifice Type
• Paddle, square-edge, concentric
• Universal, square-edge, concentric
Table A-4. Typical Orifice Hole Sizes
Line Size Pipe ID
Beta (
β
) = 0.20
d
Beta (
β
) = 0.40
d
Beta (
β
) = 0.65
d
2-in (50.8 mm) 2.067-in. (52.502 mm) 0.207 (5.26) 0.413 (10.49) 0.620 (15.75)
(1)
(1) For 2-in. (50.8 mm) line size, the beta
(
β
)
is 0.60.
3-in. (76.2 mm) 3.068-in. (77.927 mm) 0.307 (7.80) 0.614 (15.60) 0.997 (25.32)
4-in. (101.6 mm) 4.026-in. (102.26 mm) 0.403 (10.25) 0.805 (20.45) 1.308 (32.22)
6-in. (152.4 mm) 6.065-in. (154.051 mm) 0.607 (15.42) 1.213 (30.81) 1.971 (50.06)
8-in. (203.2 mm) 7.981-in. (202.717 mm) 0.798 (20.27) 1.596 (40.54) 2.594 (65.89)
10-in. (254.0 mm) 10.02-in. (254.508 mm) 1.002 (25.45) 2.004 (50.90) 3.257 (82.73)
12-in. (304.8 mm) 12.00-in. (304.8 mm) 1.200 (30.48) 2.400 (60.96) 3.900 (99.06)
14-in. (355.6 mm) 13.124-in. ( 333.35 mm) 1.312 (33.32) 2.625 (66.68) 4.265 (108.33)
16-in. (406.4 mm) 15.000-in. (381.00 mm) 1.500 (38.10) 3.000 (76.20) 4.875 (123.83)
18-in. (457.2 mm) 16.876-in. (428.65 mm) 1.688 (42.88) 3.375 (85.73) 5.485 (139.32)
20-in. (508.0 mm) 18.812-in. (477.82 mm) 1.881 (47.78) 3.762 (95.55) 6.114 (155.30)
24-in. (609.6 mm) 22.624-in. (574.65 mm) 2.262 (57.45) 4.525 (114.94) 7.353 (186.77)