CA2792579C - Magneto orifice plate - mop - Google Patents

Abstract

The Plant fluids in Oil Refineries, Petrochemicals, Power and Gas Plants are treated by permanent Magnet installed inside large Piping units (Mechanical Piping Spool), by change of fluid physical property. The Plant Pipe line must be cut to accommodate installation. Using of Piping Magnetic units is to clean the Pipe line scales, softening the water, and save Energy of burning Gases like Natural gas by 20-30% . The conventional units use big lengths piping with diameters corresponding to Pipe sizes, which is costly for Installation. My Patent the "Magneto Orifice Plate" - (MOP) uses the same principal of Magnetic treatment with low cost and use 1.50" inch total length for all Plant Pipe sizes installations, easy , Safe and has same functions of the large Magnetic unit.

Description

Application Number: 2,792,579 Classification: BO3C 1/32 Owner: Nadeem, Mahmoud Shaker Examiner: Harvey Berg Date of report: 7 May 2014 Title of the invention: Magneto Orifice Plate - MOP
Filing date: 2012/10/17 The Description 1. Technical Field The present invention lies in the field of feed water magnetic treatment for the purpose of enhanced industrial water purity and preventing lime scale accumulation inside water pipe walls as well as save of burning fuel energy at burning chambers by using permanent magnetic fields.

2. Background of the Invention Prior to this invention, it has been well known and documented that magnetic treatment of water can be very helpful in softening water It has been found and approved that exposure of liquids to magnetic fields are particularly effective in reducing crust and scale buildup on conduit walls and helping to remove the formation of scale associated with the handling of calcareous waters which deposit scales on heat exchanger and water pipelines. The phenomena is based on recognizing that magnetic fields impose forces on moving electric charges (ions in the water), The forces .1.

caused by the magnet can provide the activation energy needed by the ions to form new molecular structures and break some other structures. The new structures essentially suspend the impurities in the water in a way that reduces their tendency to precipitate out of solution to form scale on water pipes and in equipment such as heat exchangers, boiler feed water system and tubes.
Numerous magnetic devices had been proposed and are in use for the purpose of water treatment. Other than patent citations listed end of the pages, the following examples are more related:
On 22 Sep. 1953 Vermeiren U.S. Pat. No. 2,652,925 teaches a treatment apparatus using ring- or donut-shaped magnets which produces a magnetic field and a passage for the liquid to be treated.
On 12 May 1970 Dominic Avampato U.S. Patent No. 3,511,776 discloses a method and device for removing ions from sea water with the aid of applied magnetic fields within a plane perpendicular to the direction of water flow.
01 Aug 1972 Kottmeier and Happ U.S.Patent No. 3,680,705A
discloses a structure for subjecting liquids having a dissolved and suspended calcareous content to magnetic lines of force. The liquid is caused to pass around a number of permanent magnets developing lines of force through which the liquid moves in a path intersecting such lines of force.
20 April 1976 Charles H. Sanderson, U.S. Patent No. 3,951,807 discloses an apparatus for treating water to reduce the buildup of scale in water systems, a device which includes a cylindrical, multipoled magnetic core and an outer casing of magnetic material disposed in radially spaced-apart and including ports for causing the water to pass through the magnetic field between the magnet and the magnetic casing.
05 May 1981 Menold U.S. Pat. No. 4,265,754 provides an apparatus for treating fresh water by producing a magnetic field in close to a flow of water within a water conduit.
25 March 1987 China Patent No. CN86202462, relates to a tube shape for magnetizing fluid characterized in three permanence magnetic rods fixed in a pipe and have consistent axial cords use magnetic treatment for diesel, gasoline, natural gas, liquefied petroleum gas, crude oil, fuel oil and other hydrocarbon fuels such magnetization can improve combustion efficiency and reduces carbon and environmental pollution, similar fuel magnetizer granted.
12 June 1990 Zimmerman U.S. Pat. No. 4,265,755 provides a magnetic water treating device within a conduit. This device provides easy assembly without adversely affecting the ultimate functional capability of the overall unit.
03 Jan. 1995 Schoepe U.S. Pat. No. 5,378,362 provides a system for treating water to reduce calcium carbonate deposits. Pairs of magnets are utilized to facilitate changing of the spacing between adjacent magnets.
22 Oct. 1962 in Patent No. 3,059,910, a report of test made by an independent testing laboratory was introduced as showing that improved performance was noted, carbon accumulation is reduced to almost zero, and low octane fuel used in a high compression motor acts as though it has a higher octane value. It fires without a customary compression knock.

3 06 Feb. 2001 Tae Young Jeong U.S. Patent No. 618370061 discloses a fuel activation apparatus using hollow cylindrical magnetic body which maximize ionization of particles of fuel under influence force in magnetic field. Other patent citations below shows several methods and systems of magnetic fluid treatments, Similarly on 04 Nov. 2003 Deborah Barnes U.S. Pat. No.
6641725B1 provides flexible magnet, with an adhesive backing wrapped 1 or more times around the outside surface of a conduit.
Prior art also generally discloses various commercial means and methods by which different sizes magnetic emitting blocks are fixed over the steel pipe line, or magnetic bars are fixed inside piping spool with end flanges where the water stream transverse the magnetic field, the piping spools length fabricated with a length of 1.5 - 6.0 feet (450-2000) mm made according to pipe sizes. The water pipeline should be cut, mating flanges to be welded in the pipeline, the spool to be installed between the mating flanges, and hydraulic or X-Ray test should be carried out to check possibility of fluid leak after welding before plant start up.
It is apparent from the foregoing that the prior art implement the magnetic fluid treatment by utilizing electromagnetic field or external permanent magnets fixed over the line with magnetic fields surrounding a feed water inlet tube using same principle but failed to discuss, show, or suggest any type apparatus for pipelines which can be inserted into pipe flanges to fit in all plant pipeline raised face flanges using standard length apparatus.

4 3. Summary of the Invention The present invention is made for softening and treatment of industrial water to prevent built-up of scale in liquid and particularly those with highly abrasive fluids by utilizing a combination of plurality permanent magnets with strong magnetic fields to precipitate suspended solids, minerals and calcareous materials in the liquid.
The apparatus implement the latest developed magnet used for high strength magnetic field and length of time the field can act which increases the energy and transformed into activation energy in the solution for better treatment.
The apparatus comprises of orifice plate, magnetic assembly including magnetic bars, and steel ring - will be fully explained hereinafter- which provide a path to the fluid passing through an orifice plate bore designed for maximum process flow rate capacity whereby the water passing therethrough is more fully exposed to multiple magnetic fields. The apparatus inserted into pipeline flange located within water stream at any flow direction wherein the molecular clusters of the fluid being treated is subjected to strong multiple magnetic fields resulted in breakdown of the molecular clusters, and instability in fluid atoms, surface tension of the water and consequently in reduction of the industrial water hardness, control of the lime scale build-up in boilers feed water system, heat exchangers, and cooling tower water piping, a method and apparatus is also used at burning chamber inlet to save burning fuels energy. A plurality of disc or cylinder shaped permanent magnets disposed within thin stainless steel tubes are arranged to produce optimized interactions between the magnetic fields and conductive flowing liquid which is to be conditioned and the generated magnetic flux potentials and currents, the effect of the present structure being to shift the precipitation within the liquid itself.
The present magnetic structure produces a combination of plurality of high strength magnetic fields intensity through which the fluid flows. The magnetic fields coupled with the number of magnetic bars used. The direction of magnetic field within the present magnetic assembly are oriented in a selected manner to the flow of the liquid passing through the orifice, this orientation being perpendicular to the fluid stream.
In a particular embodiment of the invention, the present apparatus comprises a magnetic assembly consist of magnetic bars and steel supporting strip to hold the said bars, housed within a steel ring, the said assembly having a combination of plurality magnetic fields generated within the orifice plate bore diameter located centrally of orifice plate designed to allow maximum fluid capacity, in this manner, maximum magnetic intensity are achieved with magnetic flux forces act on the fluid stream. Present apparatus can particularly be inserted into pipe flange that act to inhibit calcium and other chemical deposits in the pipe, the fluid stream passing through the orifice plate cuts the magnetic field produced by the device, activation potentials required for nucleation then being exceeded as aforesaid. Precipitate thus formed can then be flushed from the water system. The present invention find numerous applications, a characteristic common to the applications being the ability to reduce the man power cost, maintenance, an apparatus construction parts material reduced cost, and extend the life time of process equipment individually if inserted into the inlet flange of filter, heat exchanger, evaporator, rotary machines for mechanical seals and bearings protection, and tight shut-off control valves against fine ferrous materials.
The present invention has for its object to provide a device to obtain a good result, the liquid must cut directly the lines of force of the magnetic field and does not require a supply of external power supply current, and the efficiency of which exceeds the devices where the magnets are fixed over the pipe line which may reduce the flux density passing through to reach the fluid stream inside the pipe by the outer steel wall thickness of the pipe. The present invention implement transverse and cut of the fluid stream directly and successively to the lines of force of the magnetic fields in a substantially perpendicular manner without dissipations of the magnetic field forces, it is therefore an object of the present invention to provide further embodiments of improved apparatus and for the treatment of fluids with multiple magnetic field flux forces wherein the apparatus exhibits high performance.
The design of present invention also takes in consideration the following objectives:
a. A thin compact insertion type apparatus using standard length, maximum 25mm (1.0 inch) to fit in all plant pipeline raised face flanges size 4 to 54 inch.
b. Safe method for installation and operation in hazard plant locations, means an apparatus use no cutting in plant pipeline, no spark, no welding, suitable for class 1 group B,C,D, division 1 hazard area.
c. Another object of the invention is to provide economical apparatus, simple in construction, light weight, with low material cost and manpower installation.
d. To provide a path for fluid stream through the orifice plate focused to permanent magnetic fields with magnetic flux forces act perpendicularly on the water to be treated.
e. The significant object of the invention is the combination of multiple and sequence permanent magnetic fields in the apparatus, referring to FIG.-08, the number of magnetic bars in 16.0 inch apparatus are 8 bars, each contain 8-24 rare earth permanent magnet Neodymium NdFeB grade N42, or grade N52 an average of 16 permanent magnet each, around 120 magnetic fields generated with flux density of 6800 to 10,000 gauss and a residual flux density of 14.5-14.8KG, and a tensile strength of 7.5kg/mm2 acting individually at once on fluid stream which makes it the strongest multiple magnetic fields density ever proposed or discussed in any cited patent for fluid magnetic treatment.
4. Brief Description of the Drawings:
Fig.-01 and Fig.-02 shows the actual apparatus manufactured for pipeline sizes 6.0 inch and 8.0 inch respectively. FIG.02B
shows reference drawing.
Fig.-03 is the Magneto Orifice Plate ¨MOP typical dimensional drawing of 6 inch size, showing the paddle orifice plate mounting, pipe inside and outside diameter, and steel ring dimensions.
Fig.-04 is the design calculations in inch for MOP apparatus used in different pipe sizes raised face flanges with an orifice bore diameter sizes based on higher Beta ratio than the flow orifice Beta ratio, the table shows the clearance between the steel ring and pipe inside diameter of 10mm (0.393 inch), also shows the steel ring.
Fig.-05 shows same dimensions, but in millimeters.
Fig.-06 shows design drawing for fabricating of 4.0 inch size apparatus.
FIG.-07 shows design drawing for fabricating of 6.0 inch size apparatus.
Fig.-08 shows design drawing for fabricating of 16.0 inch size apparatus.
Fig.-09 is the MOP data sheet for the service condition of fluid to be treated required by the customer.

5. Detailed Description Hard water that contains dissolved minerals, especially calcium, to scale buildup in pipes, taps and appliances, such as boilers, water heaters, heat exchangers, etc.. The consequences of such deposition causes pressure and energy losses. Various physical methods and devices for water treatment are used as alternatives to soften water by chemical additives, or ion exchange resins. The present invention relates to the treatment of water and burning fluids by permanent magnets located within an orifice plate, positioned to transverse the fluid flow direction which cause excitation in the conductive dissolved solids, the physical interaction that takes place between electrical charges and water molecules can cause certain atoms to lose their electrons.

Ionized atoms and magnetic fields cause changing to the surface tension of the fluid and characteristics of the hardness of industrial water, improve its purity and prevent the scale buildup, because of less ability to bond each other. Also the burning fuel economy is maximized at burning chamber by changing the clustered hydrocarbon fuel molecules through the magnetic fields so that the clusters break apart in more surface area of the fuel molecules to ensure complete combustion process and allows maximization of the fuel economy. The present apparatus is located within the fluid stream flow of water with combination of multiple powerful magnetic fields that act perpendicularly and directly inside the pipe to the water stream, thus generating the desired beneficial effect in changing its surface tension resulted in enhanced industrial water purity, preventing the lime scale accumulation on inside water pipe walls. Dimensioning of the device shown in aforementioned drawings wherein the essential parameters such as flow rate, process temperature, differential pressure across the orifice plate, and the magnetic field strength, are considered to achieve optimized conversion of the dissolved salts and fuel moleculars by the magnetic fields strength, resulting in effective magnetic treatment. For fuel magnetic treatment for example the cited patent of magnetic fields and burning fuel for increasing fuel effeciency in U.S. Pat. No. 4,572,145 to Mitchell, et al. describes a device which positions a magnetic field adjacent to an automotive fuel line for purposes of maximizing the burning fuel energy in combustion engine. For water treatment similar device shown in U.S. Pat. No. US6171504 B1- Steven Patterson provides a fluid treatment device and method for an improved and highly effective magnetic water treatment device.
In addition to the aforementioned treatment, the MOP
apparatus also be used to treat other types of fluids including crude oil and high viscous fluids, and can be placed on upstream crude oil transmission pipes from oil fields to decrease the build up of paraffin, waxes and greases inside the pipelines.
FIG.-01 and FIG.-02 shows pictures of actual manufactured apparatus ¨without the orifice plate- for pipeline sizes 6.0 inch and 8.0 inch respectively, the 6.0 inch apparatus is manufactured in accordance with fabrication drawing number FIG.-07 The apparatus comprises of following construction parts:
1.0 Magnetic assembly, further comprises of:
1.1. Magnet 1.2. Magnetic tubes 1.3. Steel strips 2.0 Steel ring 3.0 Orifice plate 1.0 Magnetic assembly:
1.1. Magnet In a first embodiment, referring to FIG.-02B the magnet means includes a plurality of permanent magnet discs or cylinder shaped magnets disposed within thin steel tubes(3), separated by pole pieces inside the magnetic tube. The said magnetic tubes creates multiple powerful magnetic fields acts perpendicular to the fluid stream passing through the orifice plate for more efficient and highest magnetic density and concentration.

The magnet herein means a rare earth permanent magnets discs or cylinder shaped known as NdFeB, or Neo magnets, has high Physical Properties, composed mainly of Neodymium, Iron (Fe) and Boron (B). Grade N52 or N42 used as the strongest magnet with highest "surface field" magnetic density. The function of each individual magnet is to have a minimum flux surface density of 6800 gauss. Selection of the magnet type depend on process fluid temperature and type of fluid to be treated. Different grades of neodymium with maximum operating temperatures of 200 deg.0 are used.
1.2. Magnetic tubes In a second embodiment of the invention, referring to FIG.-02B, the magnetic tubes means a stainless steel thin shield (3) including plurality of permanent magnets disposed inside the tube to form multiple magnetic fields, positioned transverse to the fluid flow at any flow direction. The magnetic tubes are hold by two row steel supporting strips (4). The number of magnetic fields depend on number of magnets in each tube, the flux density of the magnetic field generated is the number of gauss of each permanent magnet. The magnetic tubes (3) are made of thin 304 stainless steel sheet thickness of (0.3- 0.6mm), (0.01 -0.023 inch) used as shield to the magnet, and for welding the magnetic bar outside surface with the steel strips 1.3. Steel strips In a third embodiment of the invention, referring to FIG-02B, the steel supporting strips means including two rows of 316 stainless steel used to hold the magnetic bars, the number of said supporting strips are more than two rows for bigger pipe sizes, spaced-apart and parallel to each other to keep the combination in rigid construction, the said strip's holes(7) diameter made slightly bigger than magnetic tubes diameter(3) for insertion of the tubes into the holes and welding the outer tube shield surface with the strips, the width of each strip is slightly shorter than the steel ring(1) width to keep a distance for tag welding (6) of the strip ends and keep the magnetic assembly in same surface level with the ring surface, for example the widths of steel strip in 4.0 inch apparatus, 6.0 inch, and 16.0 inch size, are 12mm, 19mm, and 20mm, respectively, made shorter than ring length shown. FIG.-02B shows the welding of tube shield surface with the upper and lower strips. Number of the holes(7) in each strip herein means the number of the magnetic tubes of the assembly.
2.0 Steel ring The steel ring(1) made of 316 stainless steel. FIG.-04 and FIG.-05 shows dimensions of ring length and thickness of the steel rings for different sizes pipelines. The outer periphery surface of the ring(1) is attached with the paddle orifice plate's bore circumference at ring middle distance by four tag welding. FIG.-06, FIG.-07 and FIG.-08 shows the structural configuration of the ring with the paddle orifice plate. The steel ring length means apparatus length or the orifice plate length (thickness), referring to the same drawings, the steel ring length of 4.0 inch,

6.0 inch, and 16.0 inch apparatus are 14.35mm, 20.57mm, and 22mm respectively represent the apparatus lengths.

In order to provide proper apparatus design , the user shall fill in the fluid service condition data sheet shown in FIG.-09.
The Maximum flange faces separation distance required to insert the device into the flange is 1.0 inch, this can be achieved by simple pipe fitter's tools, however attention must be paid to ensuring that the flange faces are parallel to the orifice plate on both sides, and not angled. The new flange spreading tools shown in below reference use unique technology at present for safe spreading flange faces a distance of 5.5 - 8.5 inch.
Reference: (equalizerusa.com/) 3.0 Orifice plate The orifice plate is used for measuring volumetric or mass fluid flow rates. When it obstructs the flow of a fluid, a differential pressure is produced across the plate. Flow rate is determined based on the difference between pressure readings in the upstream side and the downstream side of the pipe. The orifice plates are widely used in Oil Refineries, Petrochemicals, and Power Plants for flow measurement. The apparatus orifice plate use the same flow orifice plate with bore diameter calculated for each application to pass maximum fluid flow capacity with minimum pressure drop across the plate. The flow orifice bore diameter (d) is determined by the Beta ratio (0.5-0.75) properly selected to calculate the orifice bore diameter, differential pressure across the plate and the maximum flow rate capacity passing through the restriction bore orifice. The bore diameter is simply calculated as follows:

Where:
B = Beta ratio, d= orifice bore diameter, and D= Pipeline diameter. As the fluid approaches the orifice, the fluid pressure increases and then drops suddenly then gradually increases until at approximately 5 - 8 pipe diameters. Higher Beta ratio, means bigger size bore diameter and higher flow rate passing through the orifice plate, lower Beta ratio means smaller size bore restriction, and lower flow rate at orifice bore.
In general orifice plates feature restriction in the cross sectional area of the process flow path that causes increase of fluid velocity. The velocity is directly proportional with the volumetric flow rate and inversely proportional with the pipe cross section Area. To avoid high velocity and choke process flow at orifice restriction and secure maximum fluid flow quantity passing through the device, the orifice plate bore diameter of the apparatus is designed higher than flow orifice bore diameter, accordingly a set of design calculations in inches and millimetres are presented in FIG.-4 and FIG.-05 based on above assumption, the above figures shows a clearance dimensions of 10 mm each side of the ring, the said clearance is used for ring insertion within pipe inside diameter, the said clearance distance has no significate value of pressure drop to develop high velocity through the orifice plate.
The magnetic assembly is rigidly attached within the steel ring by welding the two steel supporting ends of the assembly with inside surface of ring bore circumference(2). The magnetic assembly is flush mounted with the ring face surface(5) after welding, the said welding's points are wiped, therefore the orifice plate including the steel ring and the magnetic assembly is easily sandwiched between flange faces and fixed in the pipe using flange gaskets, bolts and nuts.
In a fourth embodiment of present invention, the orifice plate of the apparatus means the concentric peddle orifice plate, material 304 or 316 stainless steel accordance with the specifications of AGA., ISA., ASME., API., and ISO.
The apparatus orifice plates are used with different sizes steel pipe, and flange types such as RE flange (raised face) flange, the same are not used with RTJ (ring type joint) flanges due to its metal ring gasket which prevent installation. The apparatus is normally used with raised face flanges due to normal water pressure streams. The standard thickness of orifice plate varies in accordance with pipeline size, class and flange type, means the thickness of orifice plate in raised face flanges 4 inch pipe is 10mm, whereas plate thickness of 20 inch pipe is 25mm (1.0 inch) per raised face flange International Standard ASME B16.5:
(Reference: wermac.org/specials/dim_orificerestriction.html) Therefore the thickness of the orifice plates of 25mm (1.0 inch) can be benefit in housing the magnetic assembly within the orifice plate bore circumference for pipe sizes 20 inch and above - instead of using the steel ring as a housing- by welding the magnetic assembly steel strips ends with the said orifice plate bore inner surface circumference. The assembly after welding is flush mounted in same orifice plate level face.

The orifice plate with the magnetic assembly then sandwiched between flange faces. The orifice plate thickness herein means the apparatus total length.
FIG.-04 and FIG.-05 shows the dimensions of different pipe sizes for flange class rating 150#RF (pound raised face) only. Different dimensions are required for line class 300, 600, and 900#RF
(pound raised face) flanges. The paddle(8) of orifice plates used as holder for the apparatus during installation, carved for apparatus number and line size.
Patent Citation Citation No. Title Names Date line No.
US6171504 B1 Magnetic water or fluid system Steven Patterson 9 Jan (fluid treatment device and method for an improved and highly effective magnetic water treatment device that can be mounted on existing pipes) US4490252 Magnetic treatment Brigante Miguel F 25 Dec 1984 1-2 (Using electromagnetic coil surrounding a feed water inlet tube, having an electrical D.C.
winding about the tube) US5589065 A Magnetohydrodynamic device Jacob G. Bogatin 31 Dec1996 1-4 (An apparatus for magnetically treating fluid comprised of non-polar molecular clusters, such as water, includes a housing to permit fluid flow therethrough).
US3059910 A Means for ionizing fluids Saburo Miyata 23 Oct1962 4-5 (invention relates to a means for ionizing flowing fluids, and more particularly to means for ionizing the fuel fed to an internal combustion motor) US3349354 A Means for imposing electric Saburo Miyata 24 Oct1967 5-6 (Magnetic device for treating hydrocarbon subjecting the fuel to the combined effect of a magnetic field and an electric field) US 4659479A Reducing scale formation Raymond E. Stickler 21AprI1987 (Device employs permanent magnets within the fluid Stream) US4662314 Magnetic water conditioning Henry J.
Moore, Jr. 05. May1987 21-22 (devices operate by passing water to be treated through magnetic fields) US5037546 Permanent magnetic power Enecon Corporation 06Aug.1991 5-6 (Preventing scale has long been known, as evidenced by U.S. Pat. No. 438,579) US4605498A Apparatus for magnetic treatment Peter A. Kulish 12Aug.1986 1-3 (magnetic treatment of liquids by concentrating primarily south pole magnetic fields on the liquids to provide descaling and deliming properties thereto.) US5161512 Magnetic fluid conditioner AZ
Industries Inc. 10Nov.1992 11-12 (Treatments have proven useful for inhibiting mineral deposition to enhance combustion) US6183700B1 Fuel activation apparatus Tae Y.Jeong Apri114,1999 1-2 (Apparatus using hollow cylindrical magnetic body which maximize ionization of particles of fuel under influence force in magnetic field) --------------------------------------------- completed Nadeem Mahmoud Shaker

Claims (6)

CLAIMS (6) I claim:

1. A magnetic treatment apparatus for magnetically activating fluids to improve water purity and reducing lime scale deposits on the inside walls of a pipeline caused by water impurities, inserted into raised face flange, comprising:
An orifice plate and plurality of magnetic bars being mounted within the bore circumference of said orifice plate as a housing of said magnetic bars wherein the bore of said orifice plate is centrally positioned through which the fluid flow channel to be treated shall flow.

2. The apparatus as defined in claim 1, wherein said magnetic bars being oriented parallel to each other, positioned in space relation adjacent one another, in which plurality of magnetic fields extend perpendicularly into the axis of said flow channel to produce magnetically treated water to impinge upon surfaces of lime deposition in such a manner that said magnetically treated water flushes said surfaces.

3- The apparatus as defined in claim 1, wherein each said magnetic bar further comprises non magnetic steel material tubular body hermetically contains plurality of cylinder-shaped permanent magnets separated by spacers oriented to face the like poles of each other N-N and S-S poles along said tubular body.

4. The apparatus as defined in claim 1, wherein each said magnetic bar being inserted into distributed holes over two supporting strips positioned parallel each other, such that said magnetic bar attached therein and ends of said supporting strips are attached to the inner surface of said housing.

5. The apparatus as defined in claim 1, wherein said orifice plate diameter, thickness, and bore diameter are sized in accordance with the fluid service condition passing through said orifice plate and size of said pipeline.

6. The apparatus as defined in claim 4 or 5 wherein pressure service condition of said fluid is below 100 psig, said magnetic bars including said two supporting strips to be mounted within ring shaped housing, in such a manner that ends of said supporting strips are attached to the inner surface of said ring, and the outer surface of said ring is attached to the bore circumference surface of said orifice plate.