Mandrel bending is a popular method for rotary draw bending pipes. When used correctly, mandrels help to prevent common pipe bending problems by providing support throughout the bend radius and holding the pipe firmly against the die groove. When not positioned correctly, on the other hand, mandrels can cause a whole new set of problems. That’s why it’s so important to understand how the mandrel bending process works before getting started.
What Is a Mandrel, and How Is It Used?
A mandrel is a type of tool that consists of a solid shaft with one to five segmented, donut-shaped balls sized to be slightly smaller than the pipe or tube being bent. The mandrel is designed for insertion into the pipe, where it can help to prevent damage from not just springbok but also distortion, collapsing, rippling, and flattening. According to realtimecampaign.com, the use of mandrels gives technicians a greater level of control over the pipe-bending process.
The Benefits of Mandrel Bending Pipes
Mandrel bending isn’t right for every application. However, it is a popular fabrication method for long pipes, pipes with multiple angles or complex geometries, and large-scale orders. Companies like Haze Performance routinely use mandrel bending to generate high-quality, stainless steel pipes bent to complex angles.
Understanding tube bender axis positions can help solve problems, but it won’t eliminate issues with other manufacturing methods. Traditional tooling methods require a bend die for each specific radius, which makes it difficult to manage complex parts. Some manufacturers opt to weld pipe instead of investing in separate bend dies, but mandrel bending offers several benefits over welding, including:
Time saved on both fabrication and inspection.
Cost savings in the form of reduced need for tedious visual inspections required by welding codes and expensive x-rays when NDE is required.
Space savings as a result of reducing the need for raw materials. Unlike welding, the only material required for mandrel bending is the pipe itself.
Labor savings for onsite installations of piping systems.
Improved accuracy, especially for custom, non-isometric angles. This offers enhanced flexibility to engineers tasked with constructing complex geometries.
Highly reproducible results with no distortion and fewer imperfections than are found in welding.
This manufacturing method is perfect for applications that require full draining with no entrapment areas and maximum flow with minimal restrictions. Mandrel bending is also the right solution for jobs that require unusual angles not found among standard fittings. Finally, mandrel bending is always the right solution for applications that require NDE after welding or require consistent quality without the possibility of welding defects. Anyone not sure if mandrel bending is the right solution can check this out to learn more.
Find a Mandrel Bending Expert
Not all manufacturers offer mandrel pipe bending. Because it’s a somewhat specialized process, customers need to vet manufacturers carefully and make sure they have not just all the right equipment but also sufficient expertise to mandrel bend pipe successfully. The company should use high-quality stainless steel and offer a wide range of prefabricated products to improve access and affordability.
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