The flat side will help to prevent fluid from getting trapped. The other application of an eccentric reducer is to increase the line size to 4″ for thermowell (temperature gauge) installation. A reducer is also installed upstream and downstream of pressure safety valves (PSVs) in flare lines. If one has to really get rid of the dead leg produced in pump shutdown condition, FSD IS PREFERED. If using a caliper: lay the flange on a flat surface. Concentric size of the reducer is conducive to fluid flow, fluid flow in the smaller diameter when the interference is small, so the gas and vertical flow of liquid pipe using concentric reducer diameter reduction; eccentric size reducer because one side is flat, Gas or liquid, so the level of the installation of the liquid pipe is generally . In case of long horizontal pipe runs, air pockets are avoided by installing the eccentric reducer with the flat side up. In horizontal gas / vapor / steam piping, eccentric reducer must be installed with flat side down which allows condensed water or fluid to drain at low points. Red Earth Steels Pvt Ltd is a dependable stockist of Stainless Steel Eccentric Reducer B16.9, MS Eccentric . Eccentric reducers with the flat side up are used for all pump suction lines (excluding pumps handling slurry) on horizontal lines. Each end of the reducer has circular openings which are parallel to each other. - Sanitary 1 1/2 Eccentric ReducerTri Clamp 3 inch x 1.5 2 Pack their is no risk of pooling, unlike theirconcentric reducer counterparts,They are also well suited when one end is offset from the other in a vertical position,Tri Clamp eccentric reducers are designed primarily to reduce in a horizontal flow application, Because they are flat on . I would use an eccentric reducer with the flat side on the bottom, at least on the launcher. When the source of supply is above the pump, then the eccentric reducers must be placed with the flat side at the bottom. Answer (1 of 2): It is possible that the pump inlet reducer is a flat side down (FSD) reducer. Eccentric Reducers - an overview | ScienceDirect Topics Eccentric reducer. Select the one required, by double-clicking, and select the point on the pipe . Picture 1 - Eccentric reducers installation when source of supply is below or above the pump suction nozzle In case of long horizontal pipe runs, air pockets are avoided by installing the eccentric reducer with the flat side up. flat side down & fla t side up in eccentric reducer On an isometric view, in a horizontal line, with an eccentric reducer must be declared, or the flat side at the bottom or top must be assembled. That ensures that when drops of the heavier liquid come along the bottom of the line they too pass immediately and unhindered through the pump. A common example of using an eccentric reducer in a flat side up arrangement is in pump suction piping immediately before the pump nozzle in order to avoid creating a vapor trap in the line. The length of the reduction is usually equal to the average of the larger and smaller pipe diameters. There are two main types of pipe reducer: concentric and eccentric pipe reducers. The concentric reducer maintains the same centerline at both the large and small ends of the fitting. Swage: You can draw a Swage of 80 mm NB to 15 mm NB by selecting a Point on . It is called 'eccentric' because the center axis of the fitting is not in the same plane at either end. When the source of supply is above the pump, then the eccentric reducers must be placed with the flat side down. Eccentric reducers are more often used when the pipework lays on a pipe rack. Sometime the 'flat' side is down to ensure against build-up of debris and facilitate complete draining of the pipe (saves a valve, nipple, weld-o-let and potential vibration induced failure.) Eccentric Reducer - The eccentric reducer (abbreviated as offset is equals 1/2 times the larger ID minus the smaller ID. Comments or Corrections? The suction line should be sloped down to the pump. For Han-Dee Primer connection, see start-up. 4. Orientation of eccentric reducers depends on the service. 6. A concentric reduction (Figure 32) enables accumulation of solid deposits in the lower part and air in the upper part of the reduction. This reducer is less costly to manufacture than the eccentric type and is adaptable to most piping installations. Eccentric Reducers Installation When the source of supply is above the pump, then the eccentric reducers must be placed with the flat side down. then the eccentric reducers must be placed with the flat side down . In horizontal gas, steam, or vapor piping, eccentric reducer are required to be installed with flat side down which allows condensed water or fluid to drain at low points. In case of long horizontal pipe runs, air pockets are avoided by installing the eccentric reducer with the flat side up. Place caliper's spacers inside and open it fully. If I modelled flat side down eccentric reducer, nozzle loads are exceeding the allowable limits as first support lifted due to eccentricity. A eccentric reducer with flat side down will give a more constant flow through the control valve rather than a concentric reducer or eccentric reducer with flat side up, which will give your more flow . Red Earth Steels Pvt Ltd is a dependable stockist of Stainless Steel Eccentric Reducer B16.9, MS Eccentric . Where pipe on a pipe rack or a slipper with support under the pipe ,Concentric Reducers may be used too. This picture shows a common installation problem that the fire inspector should identify and have corrected right away. Slope upward to pump. The reducer between the line and the barrel is not a trivial issue. The purpose of an eccentric reducer on the suction side of a fire pump (when a size change is necessary) is to create a horizontal transfer of air/water into the pump. Install the pump near or directly under the tank. In those pipes, eccentric reducers must be installed with flat side down which allows condensed water or fluid to drain at low points. Eccentric with the flat side up on the suction side of a pump will not accumulate air/vapors which could get into the pump and cause cavitation, a bad thing. Similarly, which reducer is used in pump discharge? When the source of supply is below the pump, then the eccentric reducers must be placed with the flat side up. Request to advice regarding the Flat side down eccentric reducer modelling in C-II to solve above problem. Other exception is with control valves. Hello, How to insert an eccentric reducer having a flat side (up or down) in Autopipe connect v11 in which a kink is not created. . The eccentric reducers should be oriented with the flat side on top. ELL "lucking up on n. end and I NEED A 12" X 8" exentric reducer on the so. Thank you for your reply, your info is correct butt wath i mean is the center line on the "flat part of the fitting" for exemple: "I have a 12" pipe w the 90 deg. PTFE and PFA lined Eccentric reducers with PN10/16 flanges used to convey highly corrosive chemicals such as nitric and sulphuric acids As for the concern of cavitation because of this arrange. Use eccentric reducers rather than . Select the option by clicking reducer. It is used with the flat side up (flat on top FOT) or flat side down (flat on bottom FOB). Eccentric Reducer Joint. As an exception, same is flat side down in piperack where same Bottom of Pipe (BOP) has to be maintained. The Eccentric Reducer is not a joint. Drive Requirements: external drive, eccentric reducers are oriented with either the flat side up or down, waste water management facilities and other low cost applications. Concentric reducers are used where the pipework is vertically installed and at the discharge side of pumps. Red Earth Steels Pvt Ltd is devoted to proficient CS Eccentric Reducer manufacturers in India. Application of the concentric reducer The . Eccentric reducer will be placed automatically while routing with flat side down. Remember CAESAR II is a beam element analysis program. Zero the caliper, then choose any bolt hole on the flange to measure. Two type of reducers are available: Concentric Reducer and Eccentric Reducer. If you want to place the reducer with flat side up, then you can change the placement point to "Top Of Pipe". In horizontal liquid piping, eccentric reducer must be installed with flat side up so that it can prevent trapping air in the piping system. Eccentric reducers are more often used when the pipework lays on a pipe rack. It is suitable for horizontal gas/vapor/steam piping. The eccentric reducer is installed upside down. Slope upward to pump. It is a template for forming a reducer out of a sheet of material. In wet gas such as casing gas applications, an . Eccentric Reducers Installation When the source of supply is above the pump, then the eccentric reducers must be placed with the flat side down. A pig is easier to launch when the barrel and the pipeline bottoms are on the same level. The 'flat' side that is parallel to the floor should be on top." how you can do lay-out on the reducer "on the field". When installing straight side down, it prevents trapping of foreign material. Regards . Concentric reducers will trap air. Dialogue Box appears on screen showing the type of drawing PROGRAM for PIPING ISOMETRIC DRAWINGS will draw. If the horizontal suction line carrying slurry inside then it is required to provide an eccentric reducer flat side down or flat side bottom type for smooth flow of slurry. An eccentric "Flat on Bottom" reduction (Figure 31) minimizes entrapment and the accumulation of solids in the lower part, but air may remain trapped in the upper part of this reduction. Use eccentric reducers in the pump suction rather than concentric reduc-ers. This arrangement of the eccentric reducer allows the gas to have less residence time to form or coaless to larger gas bubbles from smaller bubbles. Because of the flat side, aligning and securely mounting the pipes to the rack is easier. Because of the flat side, aligning and securely mounting the pipes to the rack is easier. Eccentric Reducer flat side up. You should choose an eccentric reducer when you want to keep one side of the pipe "flat" such as against a wall or group of supports. The more the pipe is reduced, the more concerns there may be related to flow. A pipe reducer is the component in a pipeline that reduces the pipe size from a larger to a smaller bore (inner diameter). The dimensions below are to suit DIN 2848 dimensions with DIN EN1092-1 PN10 / PN16 flanges. Eccentric reducers are used at the suction side of pumps to ensure air does not accumulate in the pipe. Top flat eccentric reducer are often be used in pump suction lines to avoid accumulation of gas pockets.Eccentric reducers can avoid small "dead spots" that exist behind concentric reducers. Strainer prevents debris from entering pump suction and prevents entrapment hazard. 10/21/2015 11:47 PM. Use an eccentric reducer (with the flat side down) between the barrel and the throat to facilitate shoving the pig into the throat (with a concentric reducer or an eccentric reducer with the flat side up it can be very difficult to get a heavy pig to engage in the throat). Support pipe as required NOTICE: All connections must be air tight. When liquids are pumped that carry a small fraction of a heavier and immissible liquid the practice is to put in an eccentric reducer with the flat side on the bottom. Because of the flat side, aligning and securely mounting the pipes to the rack is easier. Suction and discharge piping should be supported to prevent transmitting forces and bending moments o the pump casing. Orientation of eccentric reducers depends on the service. Eccentric reducers create uneven flow velocity profiles at the outlets. 3. end w/the flat part on the batton" I need to know the center line on the flat part of the ffiting. See foundation section. This allows for the . Request to advice regarding the Flat side down eccentric reducer modelling in C-II to solve above problem. We are the nation's biggest distributor and supplier of Grooved Eccentric Reducer at best cost as we are one of the biggest suppliers & dealers of Eccentric Reducer Stainless Steel in India. The flow may be extremely turbulent from tanks 3 and 4 due to the elbows before reaching the main header, so piping the tank flow from 3 and 4 directly into the main header may help. But, If I modelled concentric type reducer, Nozzle loads are within allowable limits. Of those offsets the other faction the length equal the reducer which is said table type. then the eccentric reducers must be placed with the flat side down . 3" long. The dimensions below are to suit ASME 150 flanges. Foot valve maintains pump prime after . Strainer prevents debris from entering pump suction and prevents entrapment hazard. For Han-Dee Primer connection, see start-up. Use eccentric reducers rather than concentric reducers at the pump suction. Put the flat on top when the fluid is coming from below or straight (see next Figure) and the flat on the bottom when the fluid is coming from the top. Figure 3: If inlet flow originates above the pump suction nozzle, air or vapor pockets are avoided by using the eccentric reducer (right side of image) with the flat side down (Ref. Try adding rigid elements from center of pipe to bottom of pipe, and adding the supports to bottom of pipe instead of center of pipe. The gradual accumulation of air in a concentric reducer could result in a large bubble that could eventually cause the pump to stall or cause cavitation when drawn into the pump. Eccentric reducers are more often used when the pipework lays on a pipe rack. Suppose the flat side is on top for my eccentric reducer example, and so the liquid flow entering the reducer near the top will have a straight run to the outlet, which is no problem. Concentric reducers are used where the pipework is vertically installed and at the discharge side of pumps. How do you install eccentric reducer? Do not create up-ward slopes to the pump. And Eccentric Reducers also used in pumps suction side with flat side up. Foot valve maintains pump prime after . The arrangement also leaves significant liquid level which can not be pumpedWhen eccentric 3 is on bottom of 6 suction, there is greater tendency to pull . Eccentric reducer (FSU) prevents vapor from being trapped and encouraging the phenomenon of cavitation which can further damage the pipe and pump impeller. An eccentric reducer is used upstream of pumps to increase the fluid velocity and provide a net positive suction head. Horizontal liquid reducers are always eccentric, top flat (unless on control set, same as PV, TV, HV, LV) or (pipe rack), which prevents the build up of air bubbles in the system. Hi pipeman1984, Yes, it is common practice to orient eccentric reducers both flat side up and flat side down. Consequently, what is the use of concentric reducer? The eccentric reducer has offset centerlines that will maintain a flat side on the top or the bottom of the fitting, depending on how the fitting is . To insert eccentric reducer, select pipe line on smaller side of the eccentric reducer, then a . Larger bubbles mean more harm to the pump when going through the impeller. In piping liquids horizontally, eccentric reducers need the flat side up, because otherwise gasses can collect. Support pipe as required NOTICE: All connections must be air tight. The eccentric type has an edge which is parallel to that of the connecting pipe, which allows it to align with one side of the inlet. While watching the caliper's reading (if digital) rotate . 3) Always remember that in a contest between the uninformed and the laws of physics, the laws of physics will win, as surely as the earth is a circle. The bubbles rise and are pulled through the top-flat eccentric reducer quickly." Sometime the 'flat' side is down to ensure against build-up of debris and facilitate complete draining of the pipe (saves a valve, nipple, weld-o-let and potential vibration induced failure.) When a concentric or a flat on top eccentric reducer in a pipe rack will be used, the support detail, probably change. An eccentric reducer is beneficial to fluid flow, and has little interference to flow patterns during reducing. SECTION VIEWHOLE CUT IN PIPESECTIONS TOGETHER. Other exception is with control valves. Eccentric Reducers Installation When the source of supply is above the pump, then the eccentric reducers must be placed with the flat side down. Each end diameter is independently controlled. Thanks Michael for quick reply. The eccentric reducer is typically used when stepping down from one tubing size to another in a horizantal run. Conversely, the eccentric reducer has offset centerlines that will create a flat surface on either the top or the bottom of the fitting, depending on how the fitting is rolled prior to welding. Blowers, eccentric reducers and Tees. Eccentric reducers can also be useful when the flat side is down, as this allows for the complete draining of pipelines preventing any liquid from pooling, something which can happen with concentric reducers in horizontal piping. Eccentric Reducer Flat Up: There is only one options You can draw Butt Welded Eccentric Reducer with insulation Flat Up for sizes from 20X10 mm NB to 600X500 mm NB. 3" x 2.5" tri-clamp. The concentric reducer is made with both inlet and outlet on a common centerline. Orientation of eccentric reducers When the source of supply is above the pump, then the eccentric reducers must be placed with the flat side at the bottom. The dimensions below are to suit ASME 150 flanges. How do you fit an eccentric reducer? There are specific situations where the eccentric reducer must be installed with its flat side on the top or the flat side on the bottom of the fitting. Standard or long radius elbow. Eccentric Reducer flat side up. Answer (1 of 2): Eccentric reducers are used at the suction side of pumps to ensure air does not accumulate in the pipe. The orientation of the flat side depends on the direction of incoming water. See foundation section. Eccentric Reducer Flat Down: You can draw a Eccentric Reducer Flat Down of 50 mm NB to 600 mm NB by selecting a Point on Main Pipeline where bigger end of reducer will be drawn, then a point on Pipeline towards lower side end. A pipe reducer can be used either as nozzle or as diffuser . 6. Standard or long radius elbow. The position of the second end can be controlled relative to the first with the same Run . It is used in pumps discharge side. How do you fit a reducer? Indeed I am asking about a similar function as described in. Be sure the eccentric reducer is not installed up side down. A concentric or an eccentric with the flat side down will allow accumulation of air/vapors. This will avoid an air pocket at the pump suction and allow air to be evacuated. Normally this arrangement is not preferred. To suit DN. Eccentric reducers are used at the suction side of pumps to ensure air does not accumulate in the pipe. We are the nation's biggest distributor and supplier of Grooved Eccentric Reducer at best cost as we are one of the biggest suppliers & dealers of Eccentric Reducer Stainless Steel in India. 5. Reducer will be drawn and pipe will be cut. Also eccentric reducers can be useful with the flat side down to allow for the complete draining of pipelines and preventing the pooling of liquid which can happen with concentric reducers in horizontal piping. Concentric size of the reducer is conducive to fluid flow, fluid flow in the smaller diameter when the interference is small, so the gas and vertical flow of liquid pipe using concentric reducer diameter reduction; eccentric size reducer because one side is flat, Gas or liquid, so the level of the installation of the liquid pipe is generally . Horizontal lines (not at pumps): It is normal (and recommended) to use eccentric reducers (with the flat side down) for line size changes in horizontal lines on pipe racks. It should be positioned below the liquid level of the tank. Keeping the ruler in place, take the measurement of either the left side or right side bolt hole's opening. Eccentric reducer Always use an eccentric reducer at the pump suction when a pipe size transition is required. Made from 304 stainless steel. To Insert Eccentric Reducer having a flat side (up or down) Offline Ako Bahari Wed, Mar 27 2019 12:52 PM. Both types also act as pipe diameter reducers/increasers. Eccentric Reducers For Pump Suction - posted in Industrial Professionals: For example -- 6 suction pipe from tank going to 3 suction flange on pump.When eccentric 3 is on top of 6 suction, there is a greater tendency to pull entrained gas. When the source of supply is below the pump, then the eccentric reducers must be placed with the flat side up. As an exception, same is flat side down in piperack where same Bottom of Pipe (BOP) has to be maintained. But in piping vapors horizontally, eccentric reducers need the flat side down, because they need to avoid collecting liquids. Reducer: You can draw a concentric reducer, eccentric reducer flat side up, eccentric reducer flat side down or swage. The eccentric reducer is used to keep either the top or bottom of the pipe level. Where pipe laying on a pipe rack or a slipper without any support,Eccentric Reducers are used with flat side down. Reducers are used to reduce the diameter of straight run pipes. What is a pipe reducer? Uses of Concentric and Eccentric Reducers In India. Horizontal lines (not at pumps): It is normal (and recommended) to use eccentric reducers (with the flat side down) for line size changes in horizontal lines on pipe racks. ForgeFit® is a brand of rugged, high-quality fittings made from certified 304 stainless steel. The eccentric reducers should be installed flat side up. Typically supplied as a transfer moulded PFA lined investment cast steel . The Program also cuts the pipe. . 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