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One of The Oldest manufacturers, suppliers & exporter of Stainless Steel Fittings & Flanges, Alloy Steel Fittings & Flanges, Carbon Steel Fittings & Flanges Since 1987.

Orifice Flanges Manufacturer in India

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Orifice Plate Flanges Manufacturer, Suppliers & exporter in Mumbai, India, China


Fitwel Industries LLP is one of the reliable & prominent exporter, manufacturer, and supplier of Orifice Flanges in India. Orifice Flanges are used as a supernumerary of the typical pipe flanges when a stream nozzle or orifice plate is used. The prime purpose of an orifice flange is to offer an entrée to a pipeline for the metering of gases or liquids. These orifice flanges are supplied in the course of suitable test certificates of standard raw materials and finished products. An orifice plate is crammed together in the middle of a team of flanges when it is being connected in a pipeline and the whole consultation is mentioned as an orifice flange amalgamation.

Our Orifice Flanges Manufacturers in India can further be customized in terms of thicknesses, sizes, and specifications as per the specific requirements of our clients. We offer these flanges at market leading prices. Our expertise also lies in providing our clients with flanges that are widely acclaimed for their high tensile strength, durability, and corrosion resistance. We also offer these products at custom-made sizes and shapes to our respected clienteles.

What is an Orifice Flange?

An Orifice flange is a disc-shaped flange, engineered with either a Raised Face or a Ring Type Joint facing. The traditional orifice flange assembly consists of a pair of flanges, orifice plate, bolts, nuts, gaskets, jacking screws and plugs. Jacking screws ensure the easy removal of the primary flow element.

An Orifice Flange is used in combination with orifice meters to measure the flow rate of oil, gas and other liquids conveyed by the pipeline. Orifice flanges are manufactured to ASME B16.36 in multiple sizes and, material grades.
An orifice flange is used to measure the flow of the fluid conveyed by the pipeline via a flow nozzle positioned on the flange itself. Pairs of pressure tappings are machined onto the orifice flange, making separate tappings on the pipe wall unnecessary.
An Orifice flange is a disc-shaped flange, engineered with either a Raised Face or a Ring Type Joint facing.

How does an orifice flange work?

The function of the orifice flange is to measure the rate of the flow of the commodity through the piping system. Orifice flanges are easy to recognize because they have a hole drilled through the face of the flange perpendicular to the pipe. They also have an additional set of bolts called jack screws.

What is the function of an orifice?

An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow (in the latter two cases it is often called a restriction plate ).


ASME B16.5 Orifice Flanges Specification :

Standard : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings

Size : 1/2" (15 NB) to 48" (1200NB)

Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.

Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

BS : BS4504 , BS4504, BS1560, BS10

DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673


ANSI B16.47 Orifice Flanges Material & Grades:

Stainless Steel Orifice Flanges : ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L

Duplex & Super Duplex Steel Orifice Flanges : ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61, 2205 (UNS No. S31803), 2507 (UNS No. S32750)

Carbon Steel Orifice Flanges : ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F70, ASTM A350, LF2, LF3

Alloy Steel Orifice Flanges : ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

Nickel Alloy Orifice Flanges :ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020).

Copper Alloy Steel Orifice Flanges : UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500, UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu -Ni- 70/30)


All Classes Dimensions of Orifice Plate Flanges

orifice plate Flanges

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
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
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
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
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:

  • Dimensions are in millimeters unless otherwise indicated.
  • Allowable pressure difference 20 bar for temperatures up to 400 °C and D1/D3 ≥ 0.1. The thickness of the plate needs to be verified for strength in case the pressure difference is higher than 20 bar and/or the temperature is beyond 400 °C. Based on the outcome of the calculation the thickness of the plate needs to be adjusted.
  • DIA D1 & DIA D2 - to be specified by purchaser.
  • Material to be specified by purchaser.


  • Call@ 9987994248. The prime manufacturers, suppliers & exporter of Orifice Flanges in Mumbai, Ahmedabad, China, India. The high pressure rating orifice plate flanges that are being sourced by using high quality of raw material.

    Other Names: ANSI B16.5 Orifice Flanges, Orifice Plate Flanges

    Material: Stainless Steel, Carbon Steel, Duplex & Super Duplex Steel, High Nickel Alloy, Hastelloy & Titanium

    Brand: Fitwel Industries LLP

    Manufacturer: Fitwel Industries LLP

    Suppliers & Exporter: Fitwel Industries LLP

    Rating: 4.2/5 based on 46 customer reviews

    Other Related Products:


    We Supply Orifice Flanges For Various Application Industry Like :

    Oil & Gas Industries

    Oil & Gas Industries

    Petrochemical Industries

    Petrochemical Industries

    Engineering Industries

    Engineering Industries

    Chemical Industries

    Chemical Industries

    Sugar Industries

    Sugar Industries

    Power Generation Industries

    Power Generation Industries

    Fertilizers Industries

    Fertilizers Industries

    Food Processing Industries

    Food Processing Industries



    Orifice Plate Flanges Manufacturer World Wide

    Below, We are having existence in countries below for Orifice Plate Flanges

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