Autogenous welding and cutting tools

Autogenous welding: 

Autogenous welding can be used for many different welding processes. Some processes, such as gas tungsten arc welding or oxyacetylene welding, can use either filler metal or be autogenous. Processes like gas metal arc welding can never be autogenous because the welding process itself is defined by the consumable filler metal electrode. Laser beam welding or electron beam welding are almost always autogenous because the addition of filler metal is difficult to incorporate with these processes.

Perhaps the most common type of joint for autogenous welding is the edge joint. Other common autogenous welding joints include the lap joint and the corner joint. The tee joint is one type of weld joint that should never be joined autogenously. Since there is no additional metal added to the joint, metal is taken from the base material, thus reducing the intended strength of the base material.

Autogeen cutting: By means of a mixture of a fuel gas (various possibilities) and oxygen a flame is produced. In particular, the purity of the oxygen is important, this must be at least 99.5%. A decrease of 1% represents a decrease of 25% in cutting speed and as well as an increase in fuel gas consumption by 25%! The oxygen flow blows the slag (the residual of the combustion process) away as a result of which the flame cuts through the material.

The benefits of autogenous cutting are:

  • Cheaper cutting process than plasma cutting .
  • The cut at the top and the bottom is nearly equal in size. This results in a nearly straight cutting edge.
  • Possibility to cut with multiple cutting heads (depending on the thickness of the steel and the amount.

Gas flow regulators:

When controlling gas flow, volume is your goal. Choosing the right device in the beginning can sometimes be the difference in your application's success or failure and saving money.

In the industrial gas or welding industry there are two basic types of flow control devices.  They are generally referred to as fixed pressure / variable orifice and variable pressure / fixed orifice. 

A typical flowmeter regulator is a fixed pressure / variable orifice device.  The pressure is fixed at the factory to a “compensated” or calibration pressure and the gas flow is increased or decreased by adjusting the variable orifice or valve that is attached to the outlet of the flow meter regulator.  Pressures are set and fixed at the factory depending on the flow range desired and the gases are being used.

What is usually referred to as a “flowgauge regulator” is an example of a fixed orifice / variable pressure flow control device.  The regulator varies the pressure through a specially drilled or critical orifice usually mounted at the outlet of the regulator.  These devices have a special gauge calibrated to read in SCFH rather than PSIG.

Both the flow gauge and the flow meter found on flowgauge regulators and flowmeter regulators, respectively, indicate how much flow is being delivered.

Along with the two basic types of flow control devices there is a third type called a zero or non-compensated flowmeter regulator.  This type uses a flow meter as an indicator but generally functions as does a variable pressure flowgauge regulator.  It shares some features and advantages of both flowmeter and flowgauge regulators.