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ORIFICE PLATES

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Orifice Plates Eccentric Concentric Segmental 304 316 321 inconel monel

WHAT IS ORIFICE PLATE?

Orifice Plate is used for flow measurement. Orifice plates are also used for pressure reduction or flow restriction. The dimensions of orifice plates can be as per standard or as per customer specifications. Tesco Steel & Engineering manufacture a wide range of high quality SS 304 Orifice Plates in India. We offer these Inconel orifice plates in ASME/ANSI/DIN standards.

ORIFICE PLATES

What are Orifice Plate and how do they work?

Orifice plates are one of the most popular devices for the measurement and control of fluid flow. The shape and manufacturing tolerances of plates used in measurement applications are defined in the international standardization publications of ISO, AGA, ASME and others. From the formulas and data within these publications, the relationships and values of flow, differential pressure, and plate bore are determined.

In flow control applications, orifice plates are used as restriction devices to regulate fluid flow or reduce the flowing pressure downstream of the orifice plate. The use of a fixed restriction orifice can be beneficial and economic by reducing the demands on other flow system components.

Unlike measurement orifices, the sizing and design of restriction orifices are not defined by standardization organizations. Additionally, restriction orifices, abbreviated "RO", are often exposed to severe flow conditions associated with large pressure reductions and the related fluid conditions caused by liquids flashing to a gas, cavitation, and sonic (choked) flow. In torturous applications, mimicking the design of measurement orifices is not sufficient.

Orifice Plates are normally mounted between a set of Orifice Flanges and are installed in a straight run of smooth pipe to avoid disturbance of flow patterns from fittings and Valves.

Types of Orifice Plate

Square Edge (Standard) Bore
For the common square edge concentric bore orifice, the bore and bevel is the standard method of limiting the plate edge thickness.

Quadrant Edge Bore
The quadrant edge bore is an orifice with the inlet edge rounded. Instead of beveling, the plate is counterbored to the desired edge thickness. The radius of the quartercircle bore is a function of the orifice-to-pipe ratio (d/D). Thickness at the throat is equal to the radius.

Eccentric Bore
Eccentrically bored orifice plates are plates with the orifice off-center, or eccentric, as opposed to concentric. The bore of the eccentric orifice normally is inscribed in a circle which is 98% of the pipe diameter, so that solids or slurries may pass through. Eccentric orifice plates are used in many industries including heavy and light chemicals, steel, paper, nuclear and petrochemicals.

Segmental Bore
Segmentally bored orifice plates are provided for measurement where solids are entrained in a gas or liquid flow stream. The circular portion of the bore is inscribed within a circle which is normally 98% of the pipe diameter.
Industries using these bores include sewage treatment, steel, chemical, water conditioning, paper and petrochemical.

RTJ Type Orifice Plates
The RTJ type orifice plate incorporates an integral gasket, either oval or octagonal ring, for mounting between ring type joint flanges. It is based on proven technology, has no moving parts and is suitable for high temperature and pressure applications. Orifice plates are recommended for clean liquids, gases and low velocity steam flows.
Plate thicknesses depend on line size and differential pressure, and should be sufficient to prevent the plate from bending under operating conditions. Orifice plates can be made in accordance with customer drawings as required.

Paddle Type Orifice Plates
Paddle Orifice Plates are used with raised-face orifice flanges for measurement applications and installed between standard ASME flanges for restriction applications.
The plate and handle are a one-piece seamless design on 1/8-in. thick orifice plates for line sizes 2-inch though 6 inch and ASME classes less than 900.

Materials used for Orifice Plate

RTJ type orifice plates may be machined in one piece, or alternatively from two pieces, with an orifice plate screwed onto a carrier ring/gasket.

Standard material grades for orifice plates include 316 Stainless Steel, 304 Stainless Steel, 310 Stainless Steel, Hastelloy® C276, Hastelloy® B3, Duplex Stainless Steel, Super Duplex Stainless Steel, Monel® 400, Carbon Steel, Titanium, Incoloy® 800, Incoloy® 825, Inconel® 600 and Inconel® 625.

Common carrier ring/gasket materials include Stainless Steel and soft iron. To ensure correct sealing when installed between flanges, the hardness of the carrier ring/gasket material is limited to a maximum value, typically 120 for soft iron rings and 160 for Stainless Steel Rings.

Applications of Orifice Plate

The applications of orifice plates are diverse and can be found in various industries. Some common applications include:

- Oil and gas pipelines
- Chemical processing plants
- Power generation
- Water treatment facilities
-Petrochemicals
-Paper industries


Price List of Orifice Plate

Prices for Orifice Plate are very affordable.

Please click on the "Ask for Quote" button or click here to request the updated price list and ready stock information along with your requirement.

TESCO STEEL & ENGINEERING maintains a stock of all standard items and can export them at the best price.


Dimensions of Orifice Plate

Orifice Plates Eccentric Concentric Segmental 304 316 321 inconel monel
Orifice Plates Eccentric Concentric Segmental 304 316 321 inconel monel
NPS DIA
D3		 L N P T
1/2 13 0.24 1.5 30 1.5
3/4 19 0.34 1.5 30 1.5
1 25 0.42 2 30 2
1.1/2 40 0.64 3 30 3
2 51 1 6 30 3
3 76 1.5 8 40 3
4 102 1.5 10 40 5
6 152 1.5 15 40 5
8 202 3.5 15 40 7
10 253 3.5 19 45 7
12 302 3.5 20 45 10
14 341 6 20 45 10
16 392 6 21 50 11
18 443 8 23 50 13
20 494 8 25 50 16
24 595 10 29 60 18


NPS ASME B16.5 Flange Class
150 300 600 900 1500 2500
S
1/2 110 110 110 115 115 120
3/4 110 110 110 115 115 120
1 110 115 115 120 120 125
1.1/2 110 120 120 125 125 130
2 110 115 115 125 125 130
3 115 120 120 125 135 140
4 115 125 125 130 140 150
6 115 120 130 135 145 170
8 120 125 135 145 155 170
10 120 130 145 145 165 190
12 125 135 140 145 165 195
14 130 140 145 150 175
16 130 145 150 155 180
18 130 145 155 160 195
20 135 150 155 165 205
24 135 160 165 190 2205


NPS ASME B16.5 Flange Class
150 300 600 900 1500 2500
DIA
D4
1/2 48 54 54 64 64 70
3/4 57 67 67 70 70 77
1 67 73 73 80 80 86
1.1/2 86 96 96 99 99 118
2 105 111 111 143 143 146
3 137 149 149 168 175 197
4 175 181 194 206 209 235
6 222 250 266 289 282 317
8 279 307 320 358 352 387
10 339 361 399 434 434 475
12 409 422 456 497 520 549
14 450 485 491 519 577
16 513 539 564 573 640
18 548 596 611 637 703
20 605 653 681 697 754
24 716 773 789 836 899

TOLERANCES

D1 & D2 = ± 1%
D3 = ± 1 mm
D4 = 0/-0.4 mm
L = ± 0.1 mm
N = See Note 6
P = ± 0.1 mm
S = ± 0.1 mm
T = See Note 2



ORIFICE PLATES

Notes..
  1. Marking
    The Upstream side of the orifice tab shall be stamped at the indicated locations with..
    - the word UPSTREAM
    - the Tag Number
    - the ASME flange class, followed by RF
    - the nominal pipe size (NPS)
    - the measured orifice D1 (in mm)
    - the material of the orifice plate
    - the type of orifice plate (Square, Restriction etc.)
    Letter height approx. 4 mm

  2. Welding of tab
    Tab may be integral with orifice plate up to and including 7 mm plate thickness. In other cases full penetration joint to be applied.

  3. Finish of plate
    The upstream and downstream faces of the orifice plate to a diameter equal to D3 shall have a surface roughness Ra ≤ 0.8 µm ASME B46.1. The remaining annular part (between D4 & D3) of upstream and downstream faces shall have a surface roughness Ra between 3.2 and 3.6 µm ASME B46.1. This finish shall be obtained by machining with a round nosed cutting tool having a 0.8 mm radius at a feed rate between 0.35 and 0.45 mm per revolution.

  4. Concentricity
    The centre of the orifice shall not differ from the centre of the plate by more than 0.1 mm for ≤ NPS 8 and 0.2 mm for > NPS 8.

  5. Finish of throat
    The throat and outlet cone shall have a surface roughness Ra ≤ 0.4 µm ASME B46.1. All edges shall be sharp and free from burrs, so that when viewed with the naked eye no light is reflected by the corners.

  6. Plate thickness
    The difference between any two measurements of plate thickness, for annular part D1-D3, shall not differ by more than 0.001 DN in mm. The plate shall not depart from flatness along any diameter by more than 0.01 D3. Tolerance for N shall be..N ≤ 6 mm +0.1/-0.25 mm N > 6 mm +0/-1.5 mm. Thickness for annular part D3-D4, may be slightly less, max 0.05 mm, due to surface finishing difference between D1-D3 & D3-D4. (see note 3)

General notes..

SPECIFICATIONS

Orifice Plates are available in the following specifications:
Size1/2"NB to 56"NB
Class150#, 300#, 3000#, 6000#, 9000#
Sch (Schedule)XS, XXS, STD & Schedule 20, 40, 80, 160
Pressure RatingsPN 1 - PN 400
Stainless Steel Orifice PlatesASTM A 182 F - 304 / 304H / 304L / 316 / 316H / 316L / 316Ti, 309, 310, 317L, 321, 347, 904L
Duplex Steel Orifice PlatesASTM A 182 - F 51, F 53, F 55
Alloy Steel Orifice PlatesASTM A 182 - F5, F9, F11, F21, F22 & F91
Carbon Steel Orifice PlatesASTM A 105
Low Temp. Carbon Steel Orifice Plates (LTCS Orifice Flanges Flanges)A 350 LF2
Cupro Nickel (Cu-Ni) Orifice PlatesC70600, 90/10, C71500, 70/30, C71640
Nickel Orifice PlatesUNS N02200, UNS N02201
Monel Orifice PlatesUNS N04400, UNS N05500, Alloy 20
Inconel Orifice PlatesUNS N06600, UNS N06601, UNS N06625, UNS N08800, UNS N08810, UNS N08825
Hastelloy Orifice PlatesUNS N10276, UNS N06022, UNS N10665, UNS N06455
Titanium Orifice PlatesGr. 1, Gr. 2, Gr. 3, DTH 3.7035, DTH 3.7055


Countries we export to: Orifice Plate Manufacturers / Suppliers / Stockist in Kuwait, Orifice Plate Manufacturers in UAE, Orifice Plate Manufacturers in Germany, Orifice Plate Manufacturers in Saudi Arabia, Orifice Plate Manufacturers in West Africa, Orifice Plate Manufacturers in Iraq, Orifice Plate Manufacturers in Congo, Orifice Plate Manufacturers in Mexico, Orifice Plate Manufacturers in Bahrain, Orifice Plate Manufacturers in Canada, Orifice Plate Manufacturers in Philippines, Orifice Plate Manufacturers in Thailand, Orifice Plate Manufacturers in Kenya, Orifice Plate Manufacturers in Oman, Orifice Plate Manufacturers in Malaysia, Orifice Plate Manufacturers in Turkey, Orifice Plate Manufacturers in Qatar, Orifice Plate Manufacturers in Sudan, Orifice Plate Manufacturers in Netherlands, Orifice Plate Manufacturers in Oman, Orifice Plate Manufacturers in Nigeria, Orifice Plate Manufacturers in Lithuania, Orifice Plate Manufacturers in Gabon, Orifice Plate Manufacturers in Russia, Orifice Plate Manufacturers in Vietnam, Orifice Plate Manufacturers in Angola, Orifice Plate Manufacturers in Bolivia, Orifice Plate Manufacturers in Indonesia, Orifice Plate Manufacturers in UK, Orifice Plate Manufacturers in Yemen, Orifice Plate Manufacturers in Italy, Orifice Plate Manufacturers in United States, Orifice Plate Manufacturers in Venezuela, Orifice Plate Manufacturers in Spain, Orifice Plate Manufacturers in Iran, Orifice Plate Manufacturers in Estonia, Orifice Plate Manufacturers in Kazakhstan, Orifice Plate Manufacturers in Algeria, Orifice Plate Manufacturers in Jordan, Orifice Plate Manufacturers in Ecuador, Orifice Plate Manufacturers in Portugal, Orifice Plate Manufacturers in Colombia, Orifice Plate Manufacturers in Libya, Orifice Plate Manufacturers in Chile, Orifice Plate Manufacturers in Peru, Orifice Plate Manufacturers in Iran, Orifice Plate Manufacturers in South Africa, Orifice Plate Manufacturers in Bangkok, Orifice Plate Manufacturers in Namibia, Orifice Plate Manufacturers in Jeddah, Orifice Plate Manufacturers in Afghanistan, Orifice Plate Manufacturers in Israel, Orifice Plate Manufacturers in Zambia, Orifice Plate Manufacturers in Macau, Orifice Plate Manufacturers in Morocco, Orifice Plate Manufacturers in Denmark, Orifice Plate Manufacturers in Taiwan, Orifice Plate Manufacturers in Norway, Orifice Plate Manufacturers in Belarus, Orifice Plate Manufacturers in North Macedonia, Orifice Plate Manufacturers in Lebanon, Orifice Plate Manufacturers in Sri Lanka, Orifice Plate Manufacturers in Bhutan, Orifice Plate Manufacturers in Bulgaria, Orifice Plate Manufacturers in Albania, Orifice Plate Manufacturers in Ukraine, Orifice Plate Manufacturers in Belgium, Orifice Plate Manufacturers in Finland, Orifice Plate Manufacturers in Slovokia, Orifice Plate Manufacturers in Tibet, Orifice Plate Manufacturers in Romania, Orifice Plate Manufacturers in France, Orifice Plate Manufacturers in Brazil, Orifice Plate Manufacturers in Trinidad & Tobago, Orifice Plate Manufacturers in Fiji, Orifice Plate Manufacturers in Tunisia, Orifice Plate Manufacturers in Gambia, Orifice Plate Manufacturers in Mexico, Orifice Plate Manufacturers in Hungary, Orifice Plate Manufacturers in Zimbabwe, Orifice Plate Manufacturers in Mongolia, Orifice Plate Manufacturers in Ghana, Orifice Plate Manufacturers in Egypt, Orifice Plate Manufacturers in Kazakhstan, Orifice Plate Manufacturers in Czech Republic, Orifice Plate Manufacturers in Azerbaijan, Orifice Plate Manufacturers in Poland, Orifice Plate Manufacturers in Greece, Orifice Plate Manufacturers in Costa Rica, Orifice Plate Manufacturers in Kosovo, Orifice Plate Manufacturers in New Zealand, Orifice Plate Manufacturers in Croatia, Orifice Plate Manufacturers in Puerto Rico, Orifice Plate Manufacturers in Tanzania, Orifice Plate Manufacturers in Somalia.

Major Exporting Areas: SS 304 Orifice Plate Manufacturers / Suppliers / Stockist in Moscow, Port-Of-Spain, Seoul, Montreal, Dubai, Kuala Lumpur, Aberdeen, Tehran, Bogota, Petaling Jaya, Melbourne, Abu Dhabi, Courbevoie, Edmonton, Ho Chi Minh City, Bangkok, Toronto, Muscat, Milan, Busan, Mexico City, Perth, La Victoria, Santiago, Rio de Janeiro, London, Karachi, Los Angeles, Manama, Geoje-si, Atyrau, Sydney, Riyadh, New York, Jeddah, Houston, Granada, Jakarta, Brisbane, Algiers, Kuwait City, Dubai, Hanoi, Doha, Al Jubail, Chiyoda, Cairo, Gimhae-si, Caracas, Lagos, Al Khobar, Madrid, Singapore, Calgary, Colombo, Ulsan, Istanbul, Ahvaz, Dammam, Dallas, Texas, Ankara, Sharjah, Vung Tau, Angola, Benin, Burundi, Botswana, Burkina Faso, Cameroon, Douala, Central African Republic, Republic of Congo, Democratic Republic of Congo, Côte d'Ivoire, Djibouti, Eritrea, Ethiopia, Equatorial Guinea, Gabon, Guinea, Kenya, Liberia,Malawi, Mali, Mauritania, Mauritius, Casablanca-Settat, Tanger-Tetouan-Al Hoceima, Fès-Meknès, Marrakesh-Safi, Oriental, Béni Mellal-Khénifra, Souss-Massa, Laâyoune-Sakia El Hamra, Rabat-Salé-Kénitra region, Mozambique, Temara, Niger, Rwanda, Senegal, Sierra Leone, Sudan, Tanzania, Togo, Uganda, Bangkok, Bangchan, Khlong Sam Wa, Gemopolis, Lard Krabang, Pathumthani, Bangkadi, Navanakorn, Samut Prakarn, Bangplee, Bangpoo, Saraburi, Nongkhae, SIL I/Land, Chachoengsao, 304 I/P, Gateway City, Wellgrow, Rayong, Amata City, Eastern Seaboard, Hemaraj Eastern Seaboard, Rojana, Soam Eastern, Chonburi, Amata Nakorn, Hemaraj Chonburi, Pinthong, Ayutthaya, Bangpa-in, Saha Ratna Nakorn, Nakornratchasima, Kabinburi, Prachinburi, HCMC, Tan Thuan Export Processing Zone, Bien Hoa, Dong Nai Province, Amata City Bien Hoa Industrial Park, Long Binh Techno Park, Binh Duong Province, Vietnam Singapore Industrial Park, My Phuoc Industrial Park, Ho Nai Industrial Zone, Bau Xeo Industrial Park, Long Thanh Industrial Zone, Long Duc Industrial Park, Duc Hao I, Tan Huong, Long Jiang, Tra Noc I/II, Hung Phu I, Hiep Phuoc Industrial Park, Phuoc Dong Industrial Park, Dinh Vu – Cat Hai Economic Zone.