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951
User Manual
2 pgs851.5 Kb0

Meriam 951 User Manual

Model 951
Orice Plates Concentric-Segmental-Eccentric
The most common primary ow element is the concentric orice plate, often called the “sharp-edged” orice plate. Its main advantages are: low cost, accuracy, ease of installation, variety of construction material and quick delivery. Much test data has been compiled about orice plates and, with the necessary information, an exacting design can be made providing for excellent metering accuracy.
Engineered for each application, Meriam orice plates are precision bored to exact dimensions with a sharp upstream edge to ensure accuracy. Orice information is stamped on the unique handle. This handle is designed to facilitate storage of the plate without damage to the orice bore.
Standard Meriam orice plates are 304 Stainless Steel. Monel, brass, P.V.C., 316 Stainless Steel and other materials are available. Meriam orice plate dimensions meet ISA specications. Meriam can provide blank orice plates for your own boring, too.
Orice Plates Design Criteria & Tolerances
Standards and specications for orice plates are listed by the ISA, AGA and ASME. All of these do not agree in all ways. Please indicate which specications you require so we will provide your orice plates the way you want them.
Edges – Square and sharp, will not reect a beam of light when viewed with­out magnication.
Finish – 15-32 micro-inch roughness
Flatness – Flatness within 0.010 inches, per inch of dam height.
Bore – Orice bore tolerance in strict accordance with AGA. Gas Measure­ment Committee Report No. 3, ASME Fluid Meters Committee Report, and with other societies’ recommendations.
Meriam has furnished many orice plates for nuclear and fossil red power plants, chemical plants, reneries, steel mills and to original equipment manufacturers for incorporation in their equipment and systems.
Meriam can also provide readout instruments and accessories for complete ow metering installation.
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Meriam Process Technologies www.meriam.com ph: 800.817.7849 fax: 216.281.0228
Line Pipe Size
Orifice Edge Thickness “e”
Orice Edge Thickness
½”-1½” 2” - 3” 3½”-6” 8”-12” 14”-36”
1
/
1
64
”
/
1
32
”
/
1
16
8
”
/
” ¼”
Tolerances for
Orice Bore
Model 951
Orifice Bore
Plus or Minus
Tolerances
Less Than .250” .0003
.250” to .499” .0004
.500” to 1.999” .0005
2.000” to 3.999” .0010
4.000” to 9.999” .0020
10.000” to 19.999” .0050
20.000” & up .0100
Vent/Drain
Hole Diameter
Orifice Bore
Less than 1.000” None
1.000 to 3.500”
3.501 to 4.125”
4.126 to 5.000”
5.001 to 6.000”
6.001 to 6.750”
6.751 to 7.500” ¼”
7.501 to 8.375”
8.376 to 9.250”
9.251 to 10.000”
10.001 to 10.875”
10.876 to 11.625”
11.626 to 12.500”
12.501 to 13.250”
13.251” & larger ½”
Vent or Drain
Holes “G”
3
32
/
1
8
/
5
32
/
3
16
/
7
32
/
9
32
/
5
16
/
11
32
/
3
8
/
13
32
/
7
16
/
15
32
/
Orice Plates Concentric-Segmental-Eccentric
Orice Bore Calculations
The Meriam Engineering Department will calculate orice bore sizes utilizing an inhouse computer. Bore calculations are based on the LK. Spink precision bore calculations.
Tabulate your ow data and send it to Meriam with your order for precise bore sizing.
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”
”
”
”
”
”
”
”
”
”
”
Ordering Information
To order Meriam’s Model 951 orice plates custom-made to your specications, please contact your Meriam sales representative with the following information:
• Flange Rating
• Line Size
• Bore Dimensions, if available
(if unknown, consult factory)
Line Pipe
Size
Meriam Model
951C15
951B30
951B40 400# Series
951B60 600# Series
951B90 900# Series
951B150 1500# Series
125-150#
Series
250# Series 300# Series
Plate Thickness
‘E’ Meriam
STD
‘E’ AGA STD
‘E’ ISA STD
ASME
Dimensions Table
½” ¾” 1” 1¼” 1½” 2” 2½” 3” 4” 5” 6” 8” 10” 12” 14” 16” 18” 20” 22” 24”
“A” Orifice Plate O.D.
7
8
1
/
” 2¼” 2
—
1
8
2
/
”
1
8
2
/
” 2
1
8
2
/
” 2
2½” 2¾” 3
2½” 2¾” 3
1
8
/
”
— — — — —
— —
1
8
/
”
5
8
/
” 3” 3
7
8
2
/
”
7
8
2
/
” 3¼” 3¾” 4
5
8
2
/
”
5
7
8
8
/
” 2
/
” 3¼” 3¾” 4
5
7
8
8
/
” 2
/
” 3¼” 3¾” 4
1
8
/
” 3½” 3
1
8
/
” 3½” 3
1
1
8
8
/
”
/
”
1
8
/
”
1
1
8
8
/
”
/
”
3
1
7
3
8
8
/
” 4
3
8
/
” 5
3
8
/
” 5
3
8
/
” 5
5
8
/
” 6½” 6
5
8
/
” 6½” 6
1
8
/
”
1
8
/
”
1
8
/
”
1
8
/
”
8
/
” 5
1
8
/
” 5
1
8
/
” 5
1
8
/
” 5
1
8
/
”
1
8
/
”
1
8
/
”
1
8
/
”
/
” 4
7
8
/
” 5
7
8
/
” 5
1
1
8
8
/
”
/
”
1
1
8
8
/
”
/
”
1
1
8
8
/
”
/
”
7
8
8
/
” 6
/
” 7¾” 8¾” 11” 13
7
1
8
8
/
” 7
/
” 8½” 9
7
8
/
” 7” 8
7
8
/
” 7
5
8
/
” 8
7
8
/
” 8¼” 10” 11
1
8
/
”
1
8
/
”
1
8
/
”
1
8
/
”
3
/
5
8
/
” 9½” 10½” 12
1
8
/
” 9¾” 11
1
1
8
8
/
”
/
1
1
8
8
/
”
/
1
1
8
8
/
”
/
1
1
8
8
/
”
/
7
8
/
” 12
8
” 9¾” 12” 14
3
8
/
” 14
1
8
/
” 13
1
8
”
/
”
1
8
”
/
”
1
8
”
/
”
” ¼” ¼” ¼” ¼” ¼” ¼” ¼” ¼” ¼”
3
1
8
8
/
” 16
/
” 17¾” 20¼” 21
1
8
/
” 14¼” 16
5
8
/
” 15¾” 18” 19
1
8
/
” 17
7
8
/
” 17
1
8
/
”
1
8
/
” ¼” ¼” ¼”
1
8
/
”
5
8
/
” 19
1
8
/
” 16½” 19” 21
1
5
8
8
/
” 19
/
” 20½” 22
1
8
/
” 20½” 22¾” 25¼” 27¾” 29¾” — 35½”
1
1
8
8
/
”
/
” ¼” ¼” ¼” ¼” ¼” ¼”
1
1
8
8
/
”
/
”
5
7
8
8
/
” 23
/
” 26” 28¼”
1
8
/
” 21¼” 23½” 25¾” 27¾” 30½”
1
3
8
8
/
” 23
/
” 25½” 27
3
8
/
” 22¼” 24
1
8
/
” ¼” ¼” ¼” ¼”
1
8
/
” 26
5
1
8
8
/
” 25
/
” 27½” — 33”
3
3
8
8
/
”
/
”
5
/
7
7
8
/
” 28
/
3
3
8
8
/
”
/
8
” 30¼”
8
” 31
”
Orice Plates & Accutubes
3
¼”
¼”
1
8
/
”
8
/
”
85
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