For a snug fit at the outside of the tube, enter 0 cut tube wall thick and grind inside of tube to fit. There are two programs, psdesigner available upon request and pslcad available for download. Asme has suggested the standards for support span, but the bending stress considered in its calculation is very low 15. This item also has a dummy leg type pipe extension or stub welded down from an elbow. Center base support, top dummy leg, or bottom dummy leg. These local wall stress calculations are in accordance with the kellogg.
Determination of maximum span between pipe supports using. Dummy leg jacobs stress mechanics building engineering. In this paper equations for calculating the maximum span using maximum bending stress are given. Dummy legs shall not be installed at pipes operating below ambient temperature to prevent condensation to the run pipe. For designing a pipe support random on platform or additional field support structural engineer requests for loads for the piping system. Determination of optimal pipe support span for geothermal pipelines. Piping base elbow layout calculator cnet download free. One must check the load limits of that particular support to determine its full load carrying capacity. Added side of pipe calculation as well as a custom location option for when dummy leg is off center on the radius of the 90. The info that i have seen so far does not impose any sifs on the connection, and i. This came out handy at many calculations which we requires from time to time while doing piping.
Spring hangers are an integrated part of the piping industry. It has 10 pipe template development tutorial modules. Its the responsibility of the piping designer to provide with the loads unless there is a provision in the project guidelines that loads will be calculated by the structural engineer himself. Draw a circle under the vertical pipe and divide it into 16 equal spaces and number as shown. Features of this manual this manual has several features that make it easy to use online. Piping base elbow layout calculator is a iphone app that provides the fitter. Some steel items may be specially fabricated to fit other pipe diameters i. Added duck foot calculation for created a pipe support to your specification. Chapter 2 layout and fabrication of structural steel and pipe. So in this case, by increasing the dummy length, the sif will be increased as well and the piping stresses will be decreased. Table of contents when you need to cut, bevel or align.
Thank you all for the request to add offsets to the mitered pipe app. This calculator immediately produces an ordinate table of the offsets. Added running measurement for layout centerline marks or for cutting multiple strips of plate from a given length. Figure and table numbers in the text are italicized. While we are updating the ui we are also adding the spacing calculation for mitered, dummy leg and lateral calculations. Base supports this is another name for one of the items that sometimes falls under the name field support. Determination of maximum span between pipe supports using maximum bending stress theory. Pipe size, length and wall thickness of the pipeextension depends on several factors such as the total load, the parent pipe line size etc see typical dummy leg image on the right of this page. Pipingimv pemspipe support standardspipe support standard drawingsdummy pipe support standard pssdspssds02 0.
Dummy leg drafting and development is used in the piping industry. The beauty of this app is that it also produces full size pattern templates, so you dont have to measure and layout all of the work points. There are other references also who have listed the maximum support span. Dummy leg elbow support training module this presentation explains how to develop a dummy leg elbow support template. Purpose 4 the purpose of this calculation is to establish the adequacy of the pipe support configuration at the watts bar project per current. Software for designing support assemblies, developed inhouse by bergen pipe supports, is available freeofcharge to customers. Our dummy leg specification requires line size diameter dummy legs up to 3 pipe, for larger line sizes the dummy leg is typically 12 the line size plus 1 size larger ie a 4 line size requires a 3 dummy leg. It gets a little tricky when you have to layout and weld one of these supports onto an elbow or other circular shaped pipe fitting. How do you calculate how much load a particular pipe. In this an extension piece of pipe or rolled steel section is welded to an elbow in order to support the line. Base supports shall have welded end plates dummy legs. Quickly calculate up to 64 ordinates for custom cut pipe to attach to the back of a 90 degree fitting.
Anchor for bare pipe 2 through 24 for offsite dummy leg support. Dummy support legs or dummy legs this is simply a piece of pipe extended from an elbow to provide support when a pipe line enters or leaves a pipe rack short of a support and is left improperly support. Determine loads for a piping system for designing supports. The pipe fabricators blue book covers the measuring, marking, and cutting of pipe to make pipe turns and intersections. Pipe support calculator dummy leg and trunnion calculations. Greetings, i am searching for a formula to determine cut lengths for dummy legs from elbows in a side flush position. Thinking about this from a customization stand point, it may be possible by creating a custom tag for dummylegs through the class definitions. Dummy leg calculations pipelines, piping and fluid. Easy formula in hindi video software dounload link free. Example 71 area replacement calculation for a hot tap.
Works perfectly with the mitered, lateral and dummy leg app. The example below is for a mitered elbow on 238 od tubing. Piping base elbow layout calculator is a iphone app that provides the fitter with the points to make an accurate cut fish mouth, cope, etc for piping base pipe cylinder to elbow radius. A dummy leg is a stand that is used to support a section of piping but it could also be a branch pipe. Piping base elbow layout calculator is a iphone app that provides the fitter with the points to make an accurate cut fish mouth, cope, etc for piping base. Layout dgnall dimensions without calculator formula. Trunnion calculation sheet1 mechanical engineering civil. Download piping base elbow layout calc and enjoy it on your iphone, ipad, and. I cannot get a pipe shoe connected to a dummy leg support to show on an isometric. Hence for clamped shoe type anchor supports five load components will be calculated, the sixth component shall be zero. The calculator will provide dimensions for three different configurations.
Many of the end caps in our plant are plate and actually help stiffen the pipe. You can attach a message node to the dummyleg support and type the length and diameter manually. In this case the support should be shorter to absorb more expansions. Determination of maximum span between pipe supports. The pipe support calculator is designed for pipefitter weldersfabricators to eliminate the time it takes to calculate normal piping calculations. Trunnion calculation sheet1 free download as pdf file. See pipe data charts on pages 305 thru 311 for proper size selection. A stub or length of pipe sized to carry the load is welded to the elbow and extended beyond the support.
Tube and pipe notching calculator full scale printable templates if cut tube wall thick is larger than 0, the cut fits to the inside diameter of the tube, making a notch for welding. Layout and fabrication of structural steel and pipe properties and uses of metal. Dummy leg elbow support fabeasy pipe template development. Draw a view of the pipes that shows the angle of intersection. Quickly calculate up to 128 ordinates for custom cut pipe to attach to the back of a 90 degree fitting. I have a 12 horizontal run pipe, and a 6 vertical support pipe with no repad. Reducer,concentric reducer,dummy leg support,y branch,pipe offset,rolling degree,travel piece,degree calculation,mitter bend,elbow cutting formula. Piping design info xls is an excel file which almost contains all sizes of various fittings and structure sizes. Spring hanger selection and design guidelines for a piping.
How do you calculate how much load a particular pipe support can take. Feel free to connect with us on facebook if you would like to see something added. A dummy leg is a stand that is used to support a section of piping but it could also be a branch pipe added to an elbow, straight pipe or transistion. Dummy leg supports a dummy leg is an extension piece welded to an elbow in order to support a pipe line, and rests or anchors on some steel member. However, the bottom end if the stub is threaded using a straight conduit thread machine. Dummy legs shall have a maximum length as specified in appendix 7 and be provided with a 12 mm drain hole located at a short distance from the weld to the run pipe. Pipe branch elbow dummy pdf chart piping pdf chart. Save this book to read piping calculations manual free download pdf ebook at our online library. For pipefitters who go by the colors of the pipe manuals, this is the dark. Whenever some rigid supports are not taking load due to its thermal movement or rigid supports are creating bad effects on equipment connection piping engineers suggest the use of a spring hanger to share some. Does anyone have any advice on how to achieve this. Fitter formula piping and structural fitter training and. All pipe supports in this section are sized to fit schedule 4080 pipe unless otherwise noted. This book, like the two other fabrication books we sell, contains lots of charts of numbers.
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