If you search for a welding blanket, the first thing you will notice is that there are a lot of different materials used. Most welding blankets are made of fiberglass. But even then, there’s a wide variation of coatings. Which welding blanket do you need? And what makes a blanket the right fit for your job? In this article we will discuss the applications of a welding blanket, the different materials used, coatings and other useful details if you want to buy a welding blanket.
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Welding blankets are originally made for the purpose of welding. Since it’s heat resistant, it can work as a shield to protect other material against sparks and splatter. Like the bodywork of a car, a wooden floor, a carpet, … Of course, it also comes in handy while grinding, cutting and every other activity that creates heat. When welding, it’s important to know if the blanket can be used on both vertical as horizontal surfaces. Keep in mind that welding blankets on horizontal surfaces, need to sustain a lot more heat.
Since welding blankets serve as an excellent shield against heat and fire, it can also be used for many other applications. For example, a fire blanket is basically a light welding blanket and helps to prevent fires. Many people also buy a welding blanket to insulate their grill during cold weather. That way their grill keeps and stabilizes the heat longer and burns less fuel or pellets.
We also heard people using a welding blanket to protect their wood deck or lawn from a the fire pit or grill. You can even make a bonfire on a good welding blanket, the lawn underneath will be protected.
It has so many different applications, the possibilities are endless. But it’s very important to know which welding blanket you need for what purpose.
In the past, welding blankets were made of woven asbestos. For safety reasons, this production has been stopped worldwide in the early nineties. Other, more safe materials are being used now. Usually the blankets are made of a basic material. Fiberglass blankets normally are also coated depending on the wanted features. Make sure you always choose a welding blanket that is sewn with Kevlar thread. This thread is very strong and when getting in touch with high heat, it doesn’t melt, but disintegrates. Making it more safe to use.
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Fiberglass is made of the same components to make glass. Those are mixed together, heated up and from that threads are spun. Those threads are woven and that’s how a fiberglass blanket is made. Since fiberglass has a high melting temperature, it’s an excellent tool for us. The downside is that fiberglass loses small sheds that irritates the skin. To avoid this, and to increase other features like heat resistance, fiberglass fabric gets a coating.
Leather is a natural product that is fire resistant on its own. For that reason, many welding apparel (like welding aprons, welding sleeves, welding jackets etc.) is made of leather, more specific split cow leather. Leather blankets are nicer to work with than fiberglass, but it’s also much more expensive and heavier. Normally a leather blanket doesn’t have any grommets, so they work perfectly as a cover to protect car bodies against sparks and splatter.
Felt is a sort of textile that is not woven, but by pressing the fibers together. To make a felt welding blanket, carbon is used for the heat resistant character. Carbon felt has a temperature resistance of degrees Fahrenheit (about degrees Celsius), which is incredibly higher than fiberglass and leather. Felt also feels soft and won’t irritate your skin. The downside is that it’s not as strong as fiberglass and leather, and it won’t last as long either.
There are very much different coatings, each with their own specifics. We will discuss the most used. It happens often that multiple coatings are combined, with the purpose to add multiple specifics.
The cheapest welding blankets are heat treated. With this treatment, fiberglass sheds less and has a higher heat resistance. Fire blankets are usually heat treated. This type of welding blanket is for light duty welding work. Even with the heat treatment, the fiberglass still sheds a lot and should be used wearing gloves.
If you need a welding blanket that doesn’t irritate your skin and has a great heat resistance, vermiculite coated welding blanket could be the right choice. Vermiculite is a safe coating that increases all the wanted requirements of a welding blanket: it can resist a high temperature and it doesn’t irritate the skin. Vermiculite welding blankets are the best choice for both light as heavy duty welding.
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