# Pipe bending calculator

The calculations and science that go into the specifications for the safe bending of pipe can be complicated. The thickness of pipe, flexibility of the material, angle of bend needed and other factors are all considered. Fortunately, for those needing to measure the radius of a pipe that has already been bent, the process is much simpler. Measure the circumference of the pipe bend with a tape measure.

Do this by pressing the tape against the inner surface of the pipe.

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Then run the tape from the point where the bend begins on one straight end of the pipe, to the point where the bend ends on the other side of the bend. See line in blue on graphic.

Multiply the circumference measurement from Step 1 above by 2. This is for a degree pipe bend as shown in the graphic.

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For a degree pipe turn, multiply by four at this point. Anthony Smith began writing for Demand Studios in May of and has since written over articles for them. He also writes for "The College Baseball Newsletter. Take the result of the calculation in Step 2 and call this value "C. About the Author. Photo Credits. Copyright Leaf Group Ltd.The calculator can be utilized by anyone that knows the loading criteria of their application and whether the tube will be used as a beam or column.

This calculator will compute the acceptable Allied galvanized steel tubing product size based on length and load criteria. We Made an App for That! The results provided herein were generated using recognized engineering principles and are for informational purposes only. All information is provided as is, exclusive of any warranty, including, without limitation, any implied warranty of merchantability, fitness for a particular purpose, or any other warranty, whether expressed or implied.

This information may not be used or relied upon for any specific application without competent professional examination and verification of its accuracy, suitability or applicability by a licensed professional engineer. The section property and load values provided herein are based on nominal material thickness and square corners. The calculated section property values do not comply with the AISI or AISC specifications since minimum material thickness and rounded corners were not used.

The undersigned agrees to indemnify and hold harmless Allied and its directors, officers, employees, agents, representatives and affiliates from any claims, damages or costs asserted against Allied arising out of any unauthorized use of this information. We value your privacy. You can learn about how we handle information we collect by viewing our Privacy Policy. This iframe contains the logic required to handle Ajax powered Gravity Forms.

This site uses cookies to ensure you the best experience on our website. By continuing to navigate through this site or by clicking Accept, you consent to the use of cookies as described in Atkore's privacy policy.You should use this calculator to compare materials, diameters, and wall thicknesses to find out how to make your designs safer. For example, lets say your local metal distributor has 1.

You pick them both up and look at them, and they both feel pretty beefy. But you look at the thin wall on the 1. You can also look at individual parts of a roll cage under load, but please understand that evaluating roll cages is work done by trained professionals and any evaluation you do on individual parts does not indicate the overall safety of the structure. Material is nominal size material is commonly under nominal size, but within material geometry specs, like.

Loading in the middle of the longest tube is a worst case for stress on a cage member. Square tube assumes bending with one side parallel to the load think square vs diamond. The safety factors use the numbers in the table below for strength.

The red arrow in the picture below is the load, maybe a rock or a stump.

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We chose the longest tube that is likely to hit during a roll blue. In this example, we are assuming we will triangulate the rear to pieces so that they are shorter than the roof member, and also assuming that a front stinger not shown will prevent the front fender bars long pieces on the left from ever being hit directly.

This example is only showing how you could consider an isolated load on one part of your roll cage. In a real rollover, the weight of your vehicle will not be a static load on just one tube. Your vehicle will be moving, with many tubes in the roll cage supporting constantly changing loads during the roll.

You may also want to consider that a moving vehicle will put more load on a tube than a stopped vehicle. One other consideration during a real rollover is that when a tube bends, the shape of the roll cage changes and more tubes will come in contact with the ground to support the vehicle. All of this discussion about more than one tube sharing the load is to illustrate the fact that there is more to roll cage stress analysis than just looking at one tube at a time.

We hope you are able to use this tool to learn and evaluate parts of your design. Use the color coded table below to quickly see how much each material and tube size will weigh per foot all materials are round tube.

T stands for thermally treated, which is done to improve its physical properties. This low strength aluminum bends very well. This common medium strength aluminum can be welded and also bent, though not as easily as This is one of the strongest aluminum alloys, and is not very weldable and is very difficult to bend. The material is steel alloy, with a wide range of options for composition. The material can include several alloying elements for example, up to 0.

It bends and welds easily. This tube is formed through rollers from flat strips into round tubes and welded into a solid piece. The outside is smooth, and the inside may have slight flashing. The last two digits are the nominal carbon content in hundredths of a percent. DOM This tube is formed through rollers from flat strips into round tubes and welded into a solid piece and subsequently drawn over a mandrel DOM to compress the material and finish it to a precise size and geometry.

## Calculators

The inside and outside are smooth, with no seam visible.In particular, calculating the section area moment of inertia properties of common shapes for tube bending can be time-consuming and complicated.

This is so that building, bridges, and rail road tracks do not fail and have safety factors. However, section modulus can also relate to bending tubes. This is important because knowing if a bend will work before you perform it increases your efficiency, saves time, and saves material.

Performing a bend incorrectly can lead to tube bulging, tube collapse, and other tube problems. Much better to avoid these problems altogether by taking a bit more time planning your bend and performing calculations. How do you know what bender will bend your square, rectangle, non-round shape? You need to calculate the section area moment of inertia for the round material and compare it to your non-round material.

As long as the round material number is higher than the non-round material, then that particular bender will be capable of bending your part shape. There are a lot of calculations and variables involved in tube bending.

The tube bending section modulus calculator allows you to input the tube specifications into an easy to use calculator. It then calculates the section area moment of inertia properties of common shapes.

Episode 22 - How To Bend Conduit - 1/2" 3/4" and 1" EMT - BENDING 90s, OFFSETS, BOX OFFSETS, & KICKS

Some of the most common shapes covered by the calculator are:. The Tube Bending Formulas Guide that is bundled with the calculator covers some of the most common tube bending formulas, including tube inside diameter, wall factor, mandrel nose, radius, and clamp length. Together these two downloads are a powerful tool. The Tube Form Solutions Blog. What is the section modulus? What happens if you are not bending round tubes? Where can you find help with these calculations?

What shapes are covered in the calculator download? How to use these downloads Together these two downloads are a powerful tool. Where can you find both the calculator and the guide?JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. If you have questions about the services we offer, we can help. To begin, choose a profile type and part number. From there input a length and the expected profile load.

When you click "Calculate Deflection" the tool will provide several engineering specifications such as the moment of inertia and yield strength to determine the deflection. You also have options depending on the expected configuration of your solution: whether there will be one fixed end, two fixed ends or the load will be supported on both ends. Print your results for comparison or to save the information.

Software Deflection Calculator. Using The Deflection Calculator To begin, choose a profile type and part number. Select Profile Type: Fractional. Profile Part Number:.

Maximum Length of Profile:. Cross Sectional Area:. Moment Of Inertia X:. Moment Of Inertia Y:. Modulus Of Elasticity:. Fixed 1 End.

Fixed 2 Ends. Supported 2 Ends. Calculate Deflection. Deflection X. Deflection Y.

### Bending Tube with a Rogue Model 600 Bender, 101: The basics

Length From Left Deflection X. Length From Right Deflection Y. Load distance placement from left in inches. Distributor Lookup. Newsletter Sign-Up. Invalid login or password. Email Address. Sign In. Forgot Your Password?As I mentioned in my last post you need to do some tests to calculate these values for a specific sheet.

These tests include bending some samples and then do some measurements and calculations. Consider a sheet with a 20 mm thickness and a length of mm as shown in Figure 1.

We are going to review three bending scenarios with three different bending angles; 60, 90 andand we will calculate K-Factor, Bend Allowance and Bend Deduction for them. The bending tool has a radius of 30 mm which means that our Inside Bend Radius R is 30 mm. We will start by calculating the Bend Allowance. From there we can calculate the K-Factor and the Bend Deduction. After bending the sheet we need to do some measurements as shown in Figure 2.

In this formula the initial length is mm. By replacing Initial Length, Leg Length 1 and 2 in the above equation we can calculate the Bend Allowance as follows:. We know that BA is the length of the arc on the neutral axis. The length of the arc for this scenario can be calculated as:.

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By inserting the Bend Allowance value in the above equation we reach to:. For our second scenario we are going to discuss the calculations for bending angles less than 90 degrees. As an example we are going to use 60 degrees as our bending angle. Again we have to do some measurements as shown in Figure 3. Then we have to calculate Leg Length 1 and Leg Length 2.

Where R is the Inside bend radius which is equal to 30 mm in this example. We can calculate Leg Length 1 through a few simple equations as follow:. Now that we have both Leg Length 1 and 2 we can use the following equation again to calculate the Bend Allowance:.Dan has been a licensed journey-level electrician for some 17 years.

He has extensive experience in most areas of the electrical trade. Very few beginning electricians are taught anything beyond the most basic instructions for bending electrical conduit pipe EMT, electrical metallic tubing. Even more experienced journey-level electricians seldom have any idea of the wide range of possibilities available.

Nevertheless, learning how to bend conduit to very nearly any angle you want is not difficult. The math and formulas that make up a simple conduit-bending guide are actually quite simple and easily learned.

The only tools you need for more complex bends are an angle finder and a cheap scientific-type hand calculator or, in today's world, a smartphone with a calculator.

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Any electrician bending large conduit should already have an angle finder as without a hand bender to tell the angle being bent an angle finder is necessary. If you don't, there are some examples at the end of this article. And now that we have smartphones, the calculator isn't just cheap; it's free. Recommended for Android phones is the RealCalc scientific calculator app, available from the Google Play store at no charge. Simply search the store for RealCalc and download it.

The math of conduit-bending that we will discuss here comes from two sources. Some of the math is already built into a common hand bender device, and the rest of it involves the geometry of a triangle. Note that making concentric bends requires using some additional math not discussed in this article. Lots of math is built into the hand bender device. Only a few numbers and math operations need to be memorized to make offsets, saddles and 90 degree bends.

For more information on using a hand bender, see my comprehensive guide to bending conduit. Most conduit bends, in addition to a simple degree bend, can be understood and calculated using the geometry of a right triangle. The pipe above is bent into an offset. In the diagram below, the heavy black line represents the bent piece of conduit; the green triangle shows some useful lengths and angles.