Welding is the process of joining metals by melting the parts and then using a filler to form a joint. It can be done using different energy sources, from a gas flame or electric arc to a laser or ultrasound.

Until the beginnings of the 20th century, welding was done via a process known as forge welding, which consists of heating up the pieces to be fixed together and then hammering them until they amalgamate. With the advent of electricity, the process became easier and faster, and it played an important part of the industry scene during World War I and II. There are different welding processes in use in modern times:

Arc welding is done through the use of an electrical current, and can be perform eg inexpensive equipment.
Gas Welding is widely used for repair work, especially in anything involving pipes and tubes. It is common in the jewelry industry, as well as for connecting plastics and other materials that cannot stand higher temperatures.
Resistance welding involves the use of additional sheets of metal to encase the pieces to be welded together. It is the most environmentally-friendly of all methods, but it requires costly equipment that cannot be used in all situations
Energy beam welding, also known as laser beam welding, is one of the most modern techniques used. This method is fast and accurate, but the high equipment cost makes it prohibitive for many industries.

Mig Welding

This is done to keep the distance from the end of the rod to the weld puddle the same length, resulting in a uniform weld depth and penetration.MIG welding, unlike an arc welder, feeds the wire off of the spool so the welder need only focus on moving his hand in the direction of theweld.
There are three methods of stainless steel welding which are preferred over the rest by many welders: Metal Inert Gas (MIG) welding, Tungsten Inert Gas (TIG) welding, and Shielded Metal Arc Welding (SMAW) or stick welding.

1G Position
Means moving the torch facing down the work piece (flat surface welding)

1 G WELDING

Lying flat on table surface

2G Position
Welding in a 2G position means moving the torch horizontally (horizontal welding).

2G WELDING POSITION

Welding in a 3G position means moving the torch vertically, up and down across a surface. This is in contrast with 1G (flat surface welding), 2G (horizontal welding), and 4G (overhead ceiling welding).

3g welding

Verticle or angled

Pipe Welding

Tig Welding

The ability to interpret a drawing and create the necessary welds without impacting the art or design is very important in this job. On a construction site, some of the different welding jobs include foundation structures, support beams, and temporary fencing.
The process of choosing the best used TIG welder requires consideration of the job at hand, the products the company fabricates, and the specific welder functions that are available on today’s market.

Mig Welding Jobs on wiseGEEK:

The ability to interpret a drawing and create the necessary welds without impacting the art or design is very important in this job. On a construction site, some of the different welding jobs include foundation structures, support beams, and temporary fencing.
This method can be used on the same metals as MIG welding, but it does a better job of welding dissimilar metals together.

Mig Welding Process

Metal Inert Gas (MIG) welding, also sometimes called Gas Metal Arc Welding (GMAW) is a process that was developed in the 1940s forwelding aluminum and other non-ferrous metals.
The biggest downside between a MIG and TIG welder if a TIG is chosen is that the equipment is significantly more expensive, and the weldingprocess is slower and more demanding. Both the MIG and TIG welder were developed in the 1940s for different industrial uses.

pipe Welding Guide!

Pipe welding makes connecting pipe much easier than threading it. It's also less costly. Plus, you'll get better flow through pipe that has been welded together versus using connecting devices and other equipment for joining pipe.

The most common welding procedure for pipe is stick welding (SMAW). But other methods like TIG and Oxy Acetylene welding are used as well.

There is a lot of room for employment in the pipe welding field. It's a specialty field all of its own.

Since pipe often has dangerous and hazardous stuff in them welder who specialize in pipe must get certified to be able to weld it, and means you have to pass tough tests.

Welding Positions:

Pipe welding has four positions:

1G: the horizontal rolled position. In this position the pipe is horizontal and it is being rolled so that you, the welder, are actually in a flat position relative to the pipe. It's the easiest pip welding welding position.

5G: the horizontal fixed position. 5G is a lot like 1G in that the pipe is in the horizontal position. The difference is that the pipe is stationary and not rolling as you weld, which makes it more challenging.

2G: the vertical position. The 2G position is where the pipe you are welding is vertical and you are welding in the horizontal.

6G: pipe inclined fixed position. 6G is the most difficult of the pipe welding positions because the pipe is at a forty five degree angle and it is not rolling. And therefore you will need to be able to weld on all four positions to finish the 6G weld.

ATTENTION: The positions do not refer to the weld. The refer to the pipe. For example, if you are welding in the 6G position the pipe is fixed and at an incline. Not you or the weld.

Also, the letter 'G' stands for Groove Weld. And the majority of pipe welds are groove welds.

Lastly, 3G and 4G welding positions do not exist