![]() ![]() Since it is just a mild low carbon steel it has a lot of forgiving properties that allow you to weld on it with average skill levels.īut if it is going into gas carrying service and not ornamental surface then really pay attention to codes and ticket requirements.Black steel pipes have a variety of use thanks to their strength and needs for little maintenance. By its very nature it has a lot of “stuff” on its surface. Surface preparation is important when welding “black iron pipe”. Can You Weld Black Iron Pipe To Steel?īlack iron pipe is simply mild low carbon steel so it can be welded to most grades of steel.Īny limitations will come from the alloys of the other steels as then metallurgical needs such as heat treatments will need to be looked at for the heat-affected zone as well as potential problems such as weld zone cracking and galvanic corrosion issues. This may add a sheen or glossy appearance to the pipe. The pipe may also be treated/coated with coal tar enamel, lacquer, or oil for added protection. But more importantly, it provides a moderate degree of corrosion protection for the pipe. This gives black pipe its distinctive ebony color. Since black pipe is not protected by galvanizing, the factory creates a stable layer of iron oxide during the manufacturing process. These forged steel fittings are readily available in and come in various sizes. You simply weld a steel pipe to a steel fitting with your preferred method of steel to steel welding. These can be welded without fear of embrittling the fitting. So, braze or braze weld malleable iron fittings to keep the temperatures low.Īn alternative is to use socket weld fittings made from forged steel. It returns to cast iron, which is brittle and fractures easily. When heated over 1700℉, malleable iron transforms. These fittings are made from malleable iron. It is also important to note, some black pipe fittings are difficult to weld. Chronic exposure can even result in death.) Use Caution Welding Black Pipe Fittings Welding galvanized steel, will generate zinc oxide fumes which are highly toxic. Galvanized pipe is not to be welded unless a proper respirator is worn. We are not including galvanized steel in this discussion. Is it safe to weld?īlack steel pipe is not galvanized, so it is safe to weld. Welding threaded joints with teflon should be avoided. In the rare situation where you try to weld an assembled joint, any teflon present will burn and release toxic gases. One last caution, threaded pipe joints may have teflon tape in the joint. So, be sure to remove any oil, lacquer, or enamel/tar that may be present as well as dirt and debris. Remember, black pipe can also be treated/coated. In most cases, the black oxide layer should be removed with a grinder or wire brush down to bright metal. It not only minimizes fumes and smoke, but it makes for a better weld. To state the obvious, you should utilize good preparation and cleaning procedures. Most welders have a preferred method, and choices include the most common welding methods like stick, MIG, flux core, and TIG welding. Well, you can employ any of your favorite methods that work for mild steel. But what welding processes should you use? So, we already know you can weld black steel pipe. You will also see it used as supply lines in sprinkler systems. It is commonly used as supply lines to carry compressed air, natural gas, propane, and steam. ![]() But because of the various names used, some mistake black pipe for iron and wrongly assume that welding is difficult.Īlso, black pipe works well for a number of uses. As already indicated, welding is possible since this product is made from mild steel. So, black pipe is generically any ungalvanized steel pipe.īlack pipe is sometimes called black steel pipe, black iron pipe, and industrial pipe. The industry uses “ black pipe” as a term to differentiate between plain mild steel and galvanized pipe. Depending on the materials and welding process, the answer will vary. So, a simple yes or no is not enough to answer this question properly. If black pipe is not welded done properly, it can embrittle connections and even be dangerous.Īs with many things in life, the details are important when welding black pipe. ![]()
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