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The Two Ways Rolled Pipe Can be Produced

Rolled pipe is an important part of many industries. It allows factories and other businesses to customize their pipes into the exact shapes and the exact angles that they require for their space and their machines. Bend-IT, Inc is the ideal company to accomplish these tasks because they have the knowledge and experience to make sure it is done precisely according to the customer needs and they work swiftly and efficiently. They have found that many of their customers have questions about how the process works. Specifically, they have heard that there are differences between hot rolled and cold rolled pipes, but they want to make sure they understand what the terms mean. Here is a breakdown about the two techniques to help make sure everyone understands.

The Hot Rolling Process

When rolled pipe is created using the hot rolling process, it is rolled when still heated, often to over 1700 degrees. This helps to eliminate certain defects in the metal, such as broken coarse  grains, are improved. The mechanical properties and the density are also improved. The costs associated with this process tend to be lower because the process tends to be easier. The metal does not resist the rolling process as much, so the machines do not have to work as hard, reducing the amount of energy required for the pipe rolling process.

There are some drawbacks and considerations to be made with this process, however. The first is that those welding the metal must adjust their measurements to account for the heat. When the rolled pipe cools, it will slightly contract, which can cause slightly less precise sizing. Secondly, the process will produce an iron oxide skin, which reduces the metal recovery rate.

The Cold Rolling Process

The cold rolling process involves using rolling machines to slowly roll the pipe into the desired shape and angles without having heated it to the very high temperatures. Cold pipe that has been rolled in this manner will be much more precise when it comes to the final desired size. Cold rolling also tends to be more friendly towards the production for smaller, thinner pipes. Pipes produced using this technique also tend to be more expensive, as there is considerably more time and energy needed to produce the final product.

Since the pipe is not heated with this technique, companies like Bend-IT, Inc will use ‘cleaner’ ingots to roll the pipe to create a smoother, more polished finished and help reduce visual imperfections. This use of ingots also means that there tend to be fewer slag or carbon inclusions in the finished product.

Determining the best technique to produce a rolled pipe can be a bit of a challenge. There are cost considerations, considerations as to the need of precision and use for the final product, as well as considerations regarding the size and shape of the pipe to be rolled. Fortunately, the experts at Bend-IT, Inc can help industries and companies make the determination.