Carbon steel pipe welding precautions

Posted by zora li on March 21st, 2023

Welding problems are sometimes encountered during the installation of carbon steel pipes. So, how to weld pipes? What should be paid attention to when welding carbon steel pipe?

Carbon steel pipe welding is mostly done through MIG welding.

Stick welding, TIG welding, and MIG welding processes are all used in carbon steel welding. A MIG welder is the best equipment to carry out flawless carbon steel welding, though, because the wire stiffness is designed to pass through the liner from the machine with minimum friction. Depending on the voltage of the MIG welder, the weld can include one of three transfer types—short circuit, spray, or globular transfer.

Steel consists of iron and carbon with small amounts of miscellaneous metals, such as manganese, chromium, silicon, vanadium, and nickel. Low carbon steel contains only 0.3 percent carbon, making it incredibly easy to weld.
Medium carbon contains 0.30 to 0.60 percent carbon, and high carbon steels at 0.61 to 2.1 percent carbon. By comparison, cast iron contains up to 3 percent carbon, which makes it incredibly challenging to weld.

Carbon steel pipe welding precautions:

1. Before the pipeline is welded, it is necessary to remove all the debris in the pipe. After the construction is completed, a blocking plate can be used to seal it to prevent the debris from falling into it. At the same time, before welding, it is necessary to polish the oil stains on the nozzle part until the metal-like luster appears.

2. Generally speaking, the pipe material is basically spiral seam steel pipe, so the welding method of manual arc can be selected. For this kind of pipe, all welds need to be bottomed by argon arc welding, and the cover needs to be Fill with manual arc welding.