Flat face flanges have the same bolting as raised face flanges but roughly 3 to 4 times more surface contact area. Greetings, does anyone have a copy of taylor forges design of flanges for flat face gaskets engineering department bulletin no. Applications using flat face flanges are frequently those in which the mating flange or flanged fitting is made from a casting. Usually we use the lfl type and set lfl to lfl to only use bolts. Cast iron flatface, steel raisedface, both slipon and weldneck, and bronze or plastic flanges may be used see table i below. How can we use the flange in a way that p3d recognises it as a flange and connects pipes etc. Weights are based on manufacturers data and are approximate. Raised face flanges isolate the pressure retaining connection from. Apparantly the sheet metal thickness is changed by. In this case no calculations are required to find the flange dimensions, only go to asme b16. Flat face flanges using full face gaskets, the recommended torque value is generally the maximum allowable torque based on the allowable bolt area.
Rf, ff, rtj flange face and finish projectmaterials. Learn about the 5 key flange gaskets types used in the oil and gas industry. These ultrapure fittings are cleaned and double bagged to ensure ultimate cleanliness prior to installation. Din 2576 free cad models flat flange for welding pn 10. Api, ansi, bs and mss standard pipeline and piping flanges ranging from. Well, even after creating the part using sheet metal commands the flange can still not be made. How is a gasket selection affected by the flange type. The flange pad fittings codes q1p, q2p, and qsp have a flat face no oring groove and the mounting holes are tapped. Flanges prochem piping products flanges a flange is designed to connect sections of pipe or tube, or to join the pipe or tube to an assembly such as a pressure vessel, valve or pump.
When necessary to connect the flat face to a carbon steel flange, the raised face has to be removed and a full face gasket must be used instead. Flanges includes lapped, socket, slipon and welding neck flanges in its database of 600 design and sizes. We offer calculation spreadsheets, engineering services as drawings, finite element analysis, calculation reports and so on. A new approach to model bolted flange joints with full face gaskets. Existing bases of design are unsatisfactory in that they are derived from treatments which assume elastic conditions to apply, and so lead to fictitiously high stresses. The list can show either all user flanges of the current size or all user defined flanges in the data base. Analysis of full faces metallic flat gaskets interposed between pipe flanges. They are never supposed to be bolted to a raised face flange at any time. Raised face flange has a small portion around the bore is raised from the face. The flat surface allows for the gasket to have full contact with the entire mating surface. Flat face flange surface finish has no serration cr4. While some codes specify that mating surfaces should both be flat asme b31.
A blind flange is a plate for covering or closing the end of a pipe. Raised face flanges isolate the pressure retaining connection from the bolting connection. A flange can also be a plate or ring to form a rim at the end of a pipe when fastened to the pipe for example, a closet flange. Flat face ff the flat face full face flange has a gasket surface in the same plane as the bolting circle face. Figure 1 awwa c207 flat face flange figure 2 full face and ring style gaskets drawing of flat face slipon ring flange showing detail of fillet welding to pipe flat or full face gasket bolts pass through the. Available for solidworks, inventor, creo, catia, solid edge, autocad, revit and many more cad software but also as step, stl, iges, stl, dwg, dxf and more neutral cad formats.
How do we connect a raised face flange ductile iron to a. Installation and maintenance guide for nibco butterfly. This works on my pipe, but i get automatic a flat flange to welding neck connection. In this type one of the faces of flange, lying against the other face, is flat. Asme interpretation viii11685 states that external loadings acting on nozzles have to be considered in asme b16. In this paper a new software program is outlined that can calculate any gasket defined by. These design rules are based on schneiders work 1968, flat faces flanges with metaltometal contact beyond the bolt circle, asme j. The difference between them is that the raised face flange has a raised region surrounding the pipe bore.
Enter the flange data, then use the button save design to save the new flange design. Flanges are joined by bolting, and sealing is completed with the use of gaskets and other sealing methods, and fixed to the piping system by welding or threading. A gasket for a raised face flange is typically a ring gasket. A flat faced flange, abbreviated as ff, is a flange that is machined flat and does not have a ridge like a raised face or ring type joint flange. The objects in flange design are to ensure that the residual gasket load is sufficient. In addition to the flange design wizard, the appendix 2 flange design dialog has a handy asme b16. Flat face flange has a gasket surface in the same plane as the bolting circle face. Flat face ff the flat face flange has a gasket surface in the same plane as the bolting circle face. Flat face flanges are mainly used at connection to cast iron equipment, valves and specialties. Analytical modeling of flat face flanges with metaltometal. The height of the raised face depends on the flange pressuretemperature rating that is known as a class of the flange. A raised face flange rf is easy to recognize as the gasket surface area is positioned above the bolting line of the flange. Other commands, common to the model workspace, can be used to design sheet metal parts as well.
If you intend to use standard flanges, and by knowing the design conditions pressure and temp. Flange types considered include weldneck, slipon and flat plate types. Pipe size is an industry designation, not the actual size. Flat face flange b flat face flanges are used to match only specific piping valving systems. The designcalc software provides a rich array of capabilities to each user, along with an embedded library of industry data and proven methodologies that make asme bpvc section viii pressure vessel design compliance easier than ever before. Flat face flange design worksheets boiler and pressure. Flat face, raised face, malefemale, tonguegroove, rig type joint. Flat face flanges are used when the counter flanges are flat face. A raised face flange is compatible with a wide range of flange gaskets, ranging from flat to semimetallic and metallic types as, for example, jacketed gaskets and spiral wound gaskets, either ring or full face the main scope of a raised face flange design is to. A flange joint is a connection of pipes, where the connecting pieces have flanges by which the parts are bolted together.
With internal diaphragm, threaded design model 990. The principal design code for the establishment of pipeline and piping flange stresses is asme viii, division 1, appendices 2, p and s, which forms the basis for the calculations in the flanges calculator. On screen graphics aid the selection of final proportions. Hello guys, i made a flat flange in the spec editor. We have the 2015 and the 2018 p3d versions running on. Consider external loading in flange pressure rating codeware. For cases where no standard flange exists, the more complex rules of asme appendix 2 can be used. Learn different types of pipe flanges used in piping. Flange dimensions shall be such that the stresses in the flange, calculated in accordance with 27, do. This document is provided for educational purposes only. Normally flat face flanges are used in mating flanges or when the flange is made from a cast. However, for piping flanges, it seems to be the consensus that a raised face flange does not provide any extra seal functionality, but has more to do with the manufacturing method forged vs cast. Flat faced flange and raised face flange connection. Raised face flange and flat faced flange are computer programs which calculate the stresses and margins in pipe flanges.
Flat face flanges are the most economical flange type and used for noncritical, low or no specification piping. Lap joint flanges resemble, in shape, slipon flanges except for the radius at the crossing of the flange face and the bore to accommodate the flanged portion of the stub end. However, the interaction between flange, gasket and bolts are. Cast iron flat face, steel raised face, both slipon and weldneck, and bronze or plastic flanges may be used see table i below. Asme vessel code calculations finite element analysis fea solid modeling drafting canadian registration number crn assistance disclaimer.
Raised face flanges are intermediate priced and are the most common type of flange used in process equipment. Ring type joints rtj, raised face, flat face and other facings are furnished as required. This face type allows the use of a wide combination of gasket designs, including flat ring sheet types and metallic composites such. Ep pfa flare straight adapter, flange, flat face flange. The paper contains an analysis of the stress distribution in bolted flanged joints of pressure vessels, and presents a design procedure for such joints based on the analysis. Even flat parts are better in 3d fusion 360 autodesk. Flat face flange surface finish has no serration 08192010 1. A lap joint flange slips over the pipe and seats on the back of the stub end and the two are kept together by the pressure of the bolts. Raised face flange demo free version download for pc.
It can happen on pumps where the first flange is ff but the mating flange would match and then spec break to rf flanges if required re. I have a 1999 fax from an engineer at mcinnes rolled rings with a few pages describing the design method and the design worksheets for slipon and weld neck flanges, but would love to get the full bulletin. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face. Full face gasket is used when a flat face flange is used. Filler flanges, also known as compensation rings, are used to connect flanges with raised faces or sealing surfaces especially those of plastic lined steel pipe to flat faced plastic flanges. Ez calc uses the mechanical engineering short formula see below and other estimating techniques, which can be subjective.
Flanged, lug and wafer style valves are designed and suitable for installation between ansi class 125 or 150 flanges. Sizes up through 60 including flanges to mate to asme b16. This is where the compress flange design wizard comes in. Sealing face diameter f height of raised face k pitch circle diameter g thread x number of screws. This is positioned inside of the flange bolts and around the pipe bore. Diaphragm seal with flange connection with internal. However, flat face class 150 pipe flanges are used to mate against class 125 cast iron to prevent cast. The important thing to have in mind is that, it can never be connected to a raised flange facing, because it would generate bending. Flat face flanges have bolting and pressure retaining face in the same plane. The flat face flange has a gasket surface in the same plane as the bolting circle face.
Bolt two flanges of the same size together with a gasket to create an access point in a pipe line. It creates optimized appendix 2 custom or body flange designs with minimal time and effort. Design rules for flat face flanges with metaltometal contact beyond the bolt circle are covered by appendix y of the asme code. The codes provide design rules for raised face and flat face to face connections, e. The lapjoint flange and stub end assembly are used mainly in piping systems that necessitate frequent dismantling for inspection or routine maintenance. Flat face flanges may be provided at full thickness, c, or with raised face removed the latter is nonstandard. Analytical modeling of flat face flanges with metal. The purpose of the flat face is to eliminate the bending moment put on the flange when the bolts are torqued. The codes provide design rule s for raised face and flat. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. Flange weight calculator, wnrf flange weight calculator, stainless steel flange weight calculator, weld neck flange weight calculator, stainless steel flange weight chart, blind flange chart, large diameter flange weights, pipe flange weight chart, pipe flange weight chart, flange screw weight chart.
Attachment of the lapjoint flange to the piping system requires a lapjoint stub end. In designing mechanical parts in an assembly, sometimes the mating surfaces are raised faces. Flanges have three different mating faces flat face, raised face, and groove face. This standard specifies the flange types and their facings, dimensions, tolerances, threading, bolt sizes, flange face surface finish, marking, materials, pressure temperature ratings and flange masses. User defined flanges are then displayed in the select list. Types of gaskets for flanges soft, spiral, ring joint. Flat face small tongue large tongue large male face small male face.
Flat face flanges are never to be bolted to a raised face flange. This design avoids the high flange bending stresses found in a raised face flange of appendix 2 and will result in less flange thickness, even though the rules for this design are found only in sec viii. Analytical modeling of flat face flanges with metalto. Catalog 4300 hydraulic flanges components dual seal flanges.
Fastlube teflon base new xylan coated steel bolts and nuts with 14 in. Flat face flange ff the flat face flange has a gasket surface in the same plane as the bolting circle face. The flat face ff flange has a gasket surface in the same plane as the bolting circle face. Exhaust direct manufactures and distributes automotive exhaust, hardware and related accessories.
How do we connect a raised face flange ductile iron to a flat face flange made of polyester. In fusion 360, the inventor face, flange, and contour flange commands are all integrated into a single flange command. A full face gasket covers the entire flange face and includes bolt holes, typically used in flat faced flanges. Flat faced slipon flanges jis on world wide metric, inc. The design of a flange involves the selection of the gasket material, type, and dimensions, flange facing, bolting, hub proportions, flange width, and flange thickness. Flange weight chart, stainless steel flanges weight chart, carbon steel weight chart, wn flange weight chart, weight chart of ss flange, blind flange weight, flange weight chart in kg. Flat faced flanges should not be installed to flanges that are not flat faced. The raised face flange is the most common type used in process plant applications, and is easily to identify. L2 assembly removal sae j518 connection parflange sleeve. The flange design for helicoflex or oring sealing is flat faced, with metal to metal contact outside the bolt circle. View information about how to measure threaded and unthreaded pipe and pipe fittings.
Flange dimensions shall be such that the stresses in the flange, calculated in accordance with 27, do not exceed the allowable stresses specified in 28. Due to covid19, this item may have a longer lead time and orders are noncancelablenonreturnable. The compress flange wizard is a tool that creates optimized appendix 2 flange designs with minimal time and effort. Electronic piping design software will normally already have the correct dimension. Without filler flanges, when the bolts are tightened on such a joint, the plastic flange will, most likely, break.
The flange face may be raised face, ring type joint rtj or full face. Clean esd fm201 flat face mask with earloop, white, 100bag eis. Bolted flange design according to asme section viii division 1. Forged for extra strength, these heavy duty unthreaded flanges can withstand highpressure applications. The gasket tries to expand but is held in place by the flange faces. The calculator also automatically provides the tangential stress in a swivel ring for each design and size.
At the inside edge, the pressure is the pressure in the pipe. Full face gasket types are suitable for use with flat face flanges. Not sure if theres a better subreddit to pose this question but here are some more details. Flange faces raised face rf, flat face ff, ringtype. It is also used in the erection of largediameter or. Ep pfa flare straight adapter, flange, flat face fittings are durable fittings made from pfa for use in the harshest environments. In fact, the vast majority of the fold and bend features are primarily achieved with the flange tool. Flat ring gasket types are suitable for use with raised face flanges. The subject of full face flange design is limited to the work conducted by very few. Flat face flange surface finish has no serration 08182010 1.
They are often faced the necessity of calculating one single to the connection. In the superflange program 16, the location of this point is found by the. Flat face vs raised face pipe fluid conveyance screw scribd. Both programs have an easy user interface which allows for quick data input alongside a picture of the flange, instructions for each screen, and fast design alteration capability. Efficient asme appendix 2 flange design software codeware. Stainless steel flat face flanges, ss flat face flanges. Design of bolted, flanged joints of pressure vessels g. Flat face flange design worksheets sntman mechanical 21 nov 07. Efficient asme appendix 2 flange design software paul daniel 20190314t.
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