Eccentric reducer stainless steel eccentric reducer ss. Asme buttweld fitting specifications do not specify weights for fittings. A reducer is a kind of pipe fitting used in process piping that reduces the pipe size from a larger bore to a smaller bore inner diameter. Eccentric reducers are also used on pump suction nozzles to keep entrained air from entering the pump. Branch connection from steam pipeline 63 figure 39. Where we are using concentric and eccentric reducers. Steam lines should be drained at regular intervals of 3050 m and at any low points in the system. Piping engineering index the piping engineering world. Eccentric reducer an eccentric pipe reducer fitting is manufactured with the smaller outlet off center to the larger end, which allows it to align with only one side of the inlet. The in and out sections may be concentric or eccentric to each other. To see availability for this product, create an account. Unless some exotic thermodynamic extremely low flow process application, where stratification dynamics are involved, there is no beneficial. Eccentric reducers grooved fittings pipe fittings argco.
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. If the pump suction piping entered after a long horizontal run or from below the pump, the flat of the eccentric reducer should be at the top, per figs. Reduce pipe sizes using eccentric reducer fitting installed with level side down. For pump suction in the horizontal position, an eccentric reducer is normally installed rather than a concentric one. Where pipe on a pipe rack or a slipper with support under the pipe,concentric reducers may be used too. Weights quoted in the tables on this page are based on manufacturers information and should be considered as approximate and provided as a guide only fitting weights can vary considerably between manufacturers due to differences in construction. The following link shows best piping practices for reducers. Piping reducers and expanders are tapered pipe joints used to join two pipes of different sizes together. Pipe size is an industry designation, not the actual size.
Dynamic block concentric and eccentric reducer example 36. Locate reducers 18 minimum distance from branch connection. At control valve assemblies, eccentric reducers can be placed with flat sides on bottom. Types of pipe fittings used in piping a complete guide. Sep 04, 2017 water hammer has multiple adverse effects on steam systems.
Proper design, component selection, and installation of the steam pressurereducing valve stations will greatly prolong the life of all the steam components as shown in figure 1. Steam pressurereducing valve station installation guidelines. Control valves and eccentric reducers dtn6770 mechanical 22 dec 06 00. In concentric reducer the reduction of the pipe size is achieved by. Instances of rupture and disruption of piping on account of water hammer are also quite common.
The ladish 55 catalog is provided as an industry reference only. We provide the international quality standard pipe reducers which are being madeup of steel and other elements of alloys. Approximate weight of a butt welding reducer can be calculated based on its two outside diameters, length and wall thickness. Until his death at age 84, in 1995, worldrenowned pump. Stainless steel schedule 10 butt weld eccentric reducer pipe fittings available in a312 compliant dual certified 304304l or 316316l stainless steel. Use eccentric reducer couplings when downsizing the pipe. Now, as discussed in point 3, since the valve opening is kept to a lesser size than the line size, we require to add a reducer and expander before and after the valve in order to connect the valve to the line. They are used where the diameter of the pipe on the upstream. An eccentric reducer is a fitting used in piping systems between two pipes of different diameters. Reducers are usually made by reducing pressing processes, expanding pressing processes or reducing and expanding pressing processes, and we can also adopt stamping processes for reducers. The design of pump suction inlet piping produces a uniform velocity distribution profile. Situated on 36 acres and with over 300,000 square feet dedicated to production and stock, weldbend can ship any size order the same day. The right pump suction pipe size is a compromise between cost bigger pipes are more expensive and excessive friction loss small pipes cause high friction loss and will affect the pump performance.
Concentric and eccentric reducer fittings for steam piping. 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. Questions relating to proper reducer application in centrifugal pump suction lines date back many decades. Concentric reducers and eccentric reducers landee pipe. Eccentric reducer is recommended for horizontal flow to the pump. This is a eccentric reducer is a fitting in piping systems between two pipe of difarance diameters. Install condensate piping to return steam condensate collection. Buttweld fittings allow for a smooth, flush connection that provides maximum flow. So, anytime you are piping and you need the center to remain constant a concentric is the right choice. Pipe reducer dimensions concentric and eccentric reducer dimensions as per asme b16. 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. There are 2 standards, the concentric reducer, is usually used in vertical pipe lines, and the eccentric reducer that is used in horizontal pipe lines. Charlotte pipe pvc001021200ha 2 x 4 pipe increaser reducer pvc dwv drain, waste and vent schedule 40 single unit, white 4.
Im familiar with using eccentric reducers, flat side down, in steam condensate distribution collection headers for the reason you described but im not familiar with that logic carrying over to control valve station piping. Normally where do we use eccentric reducers and concentric reducers. Use of eccentric reducers to eliminate creation of condensate collection points low spots in piping use of separators to eliminate wet steam proper drip trap stations in all required locations use of air vents at all endofmain locations make steam main branch takeoffs from top of pipe use of pressure reducing valves as needed or desired. For example 6 suction pipe from tank going to 3 suction flange on pump. Nov 18, 2017 this vedio show is how to eccentric reducer marking. Conform to astm a403, astm a960, mss sp4, astm b16. The purpose of both the types of reducer, eccentric and concentric, is to trim down the contour from a bigger to smaller size of pipe, which apparently outcomes in an increased flow pressure. Best practices for condensate removal on steam lines tlv. Stainless steel schedule 10 pipe fittings eccentric reducers. When the upstream pipe is larger in size, the joint is called a pipe reducer. They are used where the diameter of the pipe on the upstream side of the fitting i. If control rods are installed as a safety measure, the locking nuts must be backed off with a clearance equal to the specified axial movement. An eccentric reducer is mostly used to force air in a direction, normally towards a pump or airvalve so that it does not get trapped inside the pipework. Reducers are classified into concentric reducers and eccentric reducers.
Concentric and eccentric reducer for fitting steam flowmeter 61 figure 37. When competitor eccentric couplings create obstruction and backup, ferncos eccentric coupling aligns the pipes inside wall to create an obstruction free flow. The best solution is to use an eccentric reducer orientated to. Subscribe now and get your free e book on piping components. For pump suction in the horizontal position, an eccentric reducer is normally. Lined piping systems consist of straight pipe lengths. Install eccentric reducer where pipe is reduced in size, with bottoms of both pipe and reducer flush.
Eccentric reducers and straight runs of pipe at pump suction. It is normal and recommended to use eccentric reducers with the flat side down for line size changes in horizontal lines on pipe racks. Reducers is installed to change the size of a pipeline from one size to another. The eccentric pipe reducers allow simple connection of. Pipe reducer dimensions concentric and eccentric reducer. Unlike a concentric reducer, which resembles a cone, eccentric reducers have an edge that is.
As a general practice, irrespective of the service, piping should be designed to accomodate for low point drains. Eccentric reducing welded fittings or threaded are essential when applicable for steam. Piping,welding,non destructive examinationndt common piping angles and their solutions,known and unknown angles and angle chart,solving rolling offsets,mitered pipe. In a few cases, water hammer has resulted into catastrophic hazards. Fig 368 368 eccentric reducer description anvil standard and extra heavy cast iron threaded fittings are manufactured in accordance with asmeb16. In this type of reducers area reduction is concentric and center line of the pipe on bigger end and. Steam lines rising in the direction of flow should slope at not less than 250 mm per 10 metres of pipe 1. And eccentric reducers also used in pumps suction side with flat side up.
Pipe reducer dimensions concentric and eccentric reducer dimensions. Policy disclaimer download free ebooks on process piping engineering. Pipe reducers before and after control valve industrial. All components are flanged and, as such, involve a great deal of care in bolting and tightening to complete a pipe installation. Pipe reducer is a kind of pipe fitting that joins two pipes of different diameter. Pipe reducer,concentric reducer,eccentric reducer,carbon. Sarda piping is manufacturer of high grade steel eccentric reducers since 1999,ready stock available of butt weld eccentric reducers, stainless steel eccentric reducers, low alloy steel eccentric reducers, asme b16. Condensate is collected at each point of steam use and in long steam pipe runs. Apr 30, 2003 eccentric reducers for pump suction posted in industrial professionals. The flow of steam is typically much faster in steam distribution piping than in equipment and can reach speeds of over 30 ms 100 fts.
What is the function of concentric pipe reducer answers. The pipe reducers are available in a range of materials depending on. Where pipe laying on a pipe rack or a slipper without any support, eccentric reducers are used with flat side down. By keeping a flat on top fot surface, vapor pockets can be eliminated. Which piping items will you drop down before conducting flushing and hydrotest. Using eccentric reducers for centrifugal pump suction piping eccentric reducers are typically installed at the centrifugal process pump suction nozzles in order to facilitate proper transition from the the larger diameter low flow velocity, moderate friction loss suction piping to the pump suction nozzle. Steam system design and best practices related to kiln drying. At all pipe rack locations, eccentric reducers are used with flat sides on bottom in order to keep bop same.
The reducer must be installed with straight side up so that it can prevent trapping air at the pump suction. Hi pipeman1984, yes, it is common practice to orient eccentric reducers both flat side up and flat side down. Reducer fittings used in pump inlet pipework are divided into two types. At these speeds, when the crosssectional area of a pipe section is completely filled by water, slugs of condensate can be carried through the piping. With reference to the illustration above, my opinion as follows. The concentric reducer is cone shaped, and is used when there is a shift in diameter between pipes.
Concentric reducer is recommended for vertical inlet suction piping or horizontal installations where there is no potential for air vapor accumulation. The principal benefit to eccentric reducers are in steam systems. Eccentric reducers an overview sciencedirect topics. The swage is like reducers but small in size and used to connect pipes to smaller screwed or socket welded pipes. Use these fittings for lowpressure applications in noncorrosive environments. Eccentric reducer asme class 150 lined piping systems crp. Why to use eccentric reducers in pump suction piping. As the flow goes from a large pipe to a reduced pipe size. Weldbend is the only domestic manufacturer of both carbon steel fittings and flanges.
How to marking eccentric reducer on pipe part 2 youtube. What is usage of concentric and eccentric pipe reducer. Reducers be applied, to change from pipe diameter in one direction. Mar 04, 2012 reducers is installed to change the size of a pipeline from one size to another. Reducers are most extensively used in piping industry to reduce or expand the straight part of run pipe. A reducer allows for a change in pipe size to meet hydraulic flow requirements of the system, or to adapt. In hot water there is no real harm so long as they are run flat on top to keep air moving. A pipe reducer is a kind of industrial pipe fittings used to connect two pipes or tubes of different diameters. When eccentric 3 is on top of 6 suction, there is a greater tendency to pull entrained gas. This is done to prevent a water level developing in the bottom of the pipe which contributes to water hammer. This configuration prevents air pocket accumulation at the upstream end of the reducer.
Eccentric reducers at pump suctions which orientation. It is not a reflection of our current product offerings. It contains concentric reducer and eccentric reducer. The aforementioned is amplified by comments found in early 20th century books. Standard dimensions for piping reducers and expanders are recommended by asmeansi standards. A concentric reducer is used to join pipe sections or tube sections on the same axis.
Concentric and eccentric reducer fittings for steam piping 62 figure 38. Nayyar, 2000, it is recommended that the extraction. Hackney ladish manufactures an industry leading line of weld fittings elbows, reducing elbows, tees, reducing tees, concentric reducers, eccentric reducers, crosses, and caps in sizes from 12 to 48 in carbon and high yield steel. The cv value of either fitting is virtually identical whether concentric or, eccentric. Until his death at age 84, in 1995, worldrenowned pump expert igor karassik frequently cor.
Using eccentric reducers for centrifugal pump suction piping eccentric reducers are typically installed at the centrifugal process pump suction nozzles in order to facilitate proper transition from the the larger diameter low flow velocity, moderate friction loss suction piping. Use your genuine email to get updates on this ebook in the future. These flanges are for lowpressure applications in noncorrosive environments. Pipe fittings join and lengthen pipes in air, water, oil, natural gas, or steam applications.
Lined piping and components can be made by one of the following. When one of the outside surfaces of the pipeline is to be maintained same, eccentric reducers are required. The reducer is one of the chemical pipe fittings, which is used for connecting two pipes with different diameters to change flow rates. The length of the reduction is usually equal to the average of the larger and smaller pipe diameters. Steam and condensate heating piping msu ipf michigan state. Control valves and eccentric reducers pipelines, piping. Design guidelines, pump operating manuals and design standards prescribe which type of reducer to use for various conditions. Piping always pitched in the direction of flow use of eccentric reducers to eliminate creation of condensate collection points low spots in piping use of separators to eliminate wet steam proper drip trap stations in all required locations use of air vents at all endofmain locations make steam main branch takeoffs from top of pipe.
A reducer allows for a change in pipe size to meet hydraulic flow requirements of the system, or to adapt to existing piping of a different size. For steam distribution systems you should allways use eccentric reducers, with the bell part on the top of the pipe. Also known as nohub pipe fittings and soil pipe fittings, these fittings are for use in gravityflow applications. Water hammer can damage equipments like flow meters which are installed on the steam network. In horizontal gas vapor steam piping, eccentric reducer must be. Eccentric series maintaining a continuous flowline in critical grade conditions. Weights of buttweld reducers concentric and eccentric. Corrosion resistant products ltd todmorden road littleborough ol15 9eg. View information about how to measure threaded and unthreaded pipe and pipe fittings. The former is used on vertical pipes, and the latter is used for horizontal pipes. Steam lines should be arranged to fall in the direction of flow, at not less than 100 mm per 10 metres of pipe 1. Control valves and eccentric reducers pipelines, piping and. As a family owned company, it is our pledge, and our mission to deliver a level of service unrivaled in our industry. Please note that actual weight of a reducer from a particular manufacturer may vary depending on manufacturing.
527 1017 1028 155 1548 1532 1348 409 1049 161 812 149 665 1277 804 1383 528 1205 552 541 1143 244 551 553 898 1466 299 1276 727 516 468 327 51 273 621