3 ways to weld a profile at right angles

3 ways to weld a profile at right angles

For each structure constructed from square pipes, it is necessary to use its own connection at an angle of 90 degrees. In some places, simplicity and speed of work performed are important, and in others, reliability and durability are important.

Three ways to connect square pipes at 90 degree angles


I propose to consider three different ways to connect a profile at right angles, for different needs from simple to complex.

First way


This is the easiest way to connect at right angles. To do this, the pipes are simply butt welded to each other. The edges are pre-cleaned.
3 ways to weld a profile at right angles

This method has the main advantage of simplicity and is mainly suitable for quickly constructed structures for a short time.
Although it has more disadvantages than advantages: the edges of the pipes must be perfectly smooth, otherwise there is no need to talk about 90 degrees. Further, the end of one pipe remains open and exposed to weather conditions.

Second way


The second and most common method is to weld both pipes at 45 degrees.
On each pipe, using a marking triangle, we draw cut lines at an angle of 45 degrees.
3 ways to weld a profile at right angles

We connect the bevels.
3 ways to weld a profile at right angles

Next, everything is sawed off with a grinder.
3 ways to weld a profile at right angles

The edges are cleaned.
3 ways to weld a profile at right angles

Before making a continuous seam, we place fixing points.
3 ways to weld a profile at right angles

Next, scald. This method is the optimal and most reliable of all. It is good to use in the manufacture of single, load-bearing structures.
Among the shortcomings, I would like to note the complexity of all calculations and adjustments in precise units.

Third way


Let's move on to the last and most difficult, at first glance, connection of pipes at 90 degrees: welding with an insert.
First, an insert must be made from a pipe of the same diameter as the pipes being welded. To do this, draw a line on the profile at 45 degrees.
3 ways to weld a profile at right angles

We lean the pipe and measure its length along the segment.
3 ways to weld a profile at right angles

Then draw a line from this point at a right angle.
3 ways to weld a profile at right angles

It is necessary to cut out the resulting corner.
3 ways to weld a profile at right angles

3 ways to weld a profile at right angles

We clean it up.
3 ways to weld a profile at right angles

The result is a perfect connection.
3 ways to weld a profile at right angles

This method is good for the production of complex structures with a large number of angles. It is enough to cut the required number of these inserts and start assembling.
This connection also has a smooth angle, there are cases where this is necessary.
3 ways to weld a profile at right angles

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