Introduction

Black pipe is usually a steel pipe with a low carbon content. It is usually used in gas pipelines and can also be used for furniture frames and supports. But what should be paid attention to when welding with other steels? Can it be welded?

It is very important to understand some of the uses, production methods and compatibility of black pipes.

Can You Weld Black Pipe to Steel?

Black pipe can be welded to other steels. Black pipe is a type of carbon steel pipe, but with a low carbon content. Clean the surface when welding, which can make the weld stronger.

What Is Black Pipe?

Black pipe can also be called black steel pipe. It is made of low carbon and uncoated. Its dark color is due to the iron oxide scale during the production process. It is usually used in: gas pipeline systems, fire sprinkler systems, structural frames and some industrial pipelines.

Unlike galvanized pipes, black pipes have no coating and are welded later, but the anti-corrosion effect is also worse.

What Kind of Steel Is Black Pipe?

The raw materials of black pipes are usually low carbon steel and mild steel, with a carbon content between 0.05%-0.%. This material of steel pipe is easier to weld and form.

Steel pipes that can be welded with black pipes include: mild steel plate (A36), square pipes and flat steel.

Best Welding Methods for Black Pipe

MIG Welding (GMAW)

• Suitable for beginners
• MIG blaster and shielding gas are required for welding
• Suitable for welding thin-walled to medium-walled pipes

Stick Welding (SMAW)

• Suitable for outdoor welding
• Suitable for steel pipes with less surface contamination
• Use 6011 and 7018 welding rods

TIG Welding (GTAW)

• Suitable for precision welding process
• High welding process requirements
• The cleanest welding effect

The above three welding methods are all suitable for welding black pipes, and you only need to choose according to actual needs.

How to Prepare for Welding Black Pipe to Steel

1. Surface cleaning

After the black pipe is produced, an oily coating will be applied on the surface. When welding, it needs to be polished with a wire wheel or a grinding wheel, and then welded.

2. Firmly clamp

When welding, you need to use a C-type clamp to fix it first, and then weld.

3. Selection of welding rods

For low carbon steel, MIG welding usually uses ER70S-6 welding rods or E6001, E7018 welding wires.

4. Welding environment

Usually choose a generally good environment for welding.

5. Weld inspection

There may be welds during the welding process, and further inspection is required after welding to ensure the sealing.

Safety Tips

The welding port needs to be polished before welding.

Check the thickness of the steel pipe to facilitate the phenomenon of not burning through during welding.
There will be smoke during welding, so safety gear is also required when welding in a well-ventilated environment.

After welding, the weld should be inspected to ensure its sealing.

Common Projects That Use Welded Black Pipe

Industrial style furniture such as desk shelves, etc.

Fences and handrails

Industrial piping systems

Agricultural or greenhouse structural frames

Summary

Since black pipes can be welded with other steel materials, different welding processes and welding rods should be selected according to different materials. And when welding, ensure that the welding surface is clean and free of dirt.