What are some things you should know about black iron pipes?
- They’re different from galvanized pipes.
- Black iron pipes can still rust.
- They need extra protection underground.
- They can withstand up to 150 PSI of pressure and high temperatures.
- They’re easy to attach.
Black iron pipes are popular materials used for transporting gas and water. They are used both for household and commercial applications, and they are generally stronger than other materials such as PVC. The composition and characteristics of black iron pipes make them perfect for some applications, and not so perfect for others. If you plan on working with black iron pipes, then it’s best to be aware of these things you should know about black iron pipes. Read on for more.
They’re different from galvanized pipes.
Black iron pipes are mainly differentiated from galvanized pipes. Because they are both made of steel, some people may find them confusing. Galvanized pipes are steel pipes that have been coated with a zinc compound to help them fight against corrosion and be more durable. This coating is also why galvanized pipes are more expensive. Black iron pipes have no coating such as this, not even paint. The black color comes from the iron oxide from the manufacturing process.
Black iron pipes are widely used for gas and water applications, though with the introduction of other materials such as PVC for water lines, black iron has been used more for gas.
Black iron pipes can still rust.
Another reason why black iron pipes are better for gas is that they lack the protective coating to prevent rusting. Being in constant contact with water, or even being in a moist environment, can easily rust a black iron pipe. You can apply your own protective coating to the pipe, but the easiest way to protect them is by painting.
Even though they are still sometimes used to transport water, they are never used for potable water as the corrosion in the metal will mix rust with drinking water. They are best used for closed-loop hydronic systems and steam heat systems because they wouldn’t be regularly exposed to oxygen. They are also commonly used as conduits for electrical wiring.
They need extra protection underground.
Since one of the major applications of black iron pipes is transporting gas, having them placed underground should be considered. This is especially important if you’re supplying gas or water to rural areas. The natural heat resistance of these pipes can help, but underground environments tend to be moist or easily reached by water. It is not recommended to bury black iron pipes unless you cover them in protective coating against oxidation. If protected against moisture, the durable nature of metal will prove useful as it can last more than 10 years underground. But without protection, it won’t last that long.
They can withstand up to 150 PSI of pressure and high temperatures.
Like all pipes, black iron pipes also have their pressure limits. They typically handle natural or propane gas, both of which are always below 60 psi. This is well below the required standards that properly installed black iron pipes must follow which is at 150 psi. If you’re using good-quality black iron pipes, they should be able to withstand those pressures.
As mentioned earlier, black iron pipes have natural heat resistance. They usually have a melting point of over 538°C (1000°F), but the Teflon tape that is often used to hold the joints together will fail at around 260°C (500°F). Even if the pipe can handle higher temperatures, if the tape fails, then the pipe will start leaking. The good news is that normal weather or natural environments don’t reach temperatures that are as high as that. So unless your pipes are near any machines that produce extreme heat, you don’t have to worry about their malfunction because of the temperature.
They’re easy to attach.
Black iron pipes are easy to install because they have seams, only use a series of fittings, and no welding is required. Since black iron pipes are cheaper than galvanized pipes, having no need for welding makes it a cost-efficient option. Black iron pipes are also known to be malleable, meaning they can be threaded with ease and attached to other parts without problems. As long as you avoid using it in environments where it will easily corrode or rust, the black iron pipe is a great material to use.
Key Takeaway
All these things you should know about black iron pipes will help you handle them in the field better. Being more knowledgeable about the materials you use will help you avoid mistakes that may cost more than you expect. The properties of black iron, the ideal applications, and all other details about it should be considered to maximize its potential.
If you plan on getting some black iron pipes or working on projects that require steel pipes, try and get the best ones you can find. The Supreme Steel Pipe Corporation is the most trusted steel pipe supplier in the Philippines, having gained many customers’ trust by providing quality materials since 1991. Take a look at the products we offer here, and feel free to contact us here!