What a Gas Cutting Nozzle Is?
Just what is a gas cutting nozzle? This is a metallic device used in the fabrication industry. Its primary and core function is to
preheat the metal to be cut to its ignition or melting point.
Additionally, it provides a stream of oxygen gas to react with the metal being cut and consequently blows away the slag. Echoing
this, it is the device at the piping tip of commonly used oxy-acetylene flame used for cutting steel. The small metallic part that
dispenses the flame.
There is a variety of gas cutting nozzle types in the market. Each is chosen depending on the size, torch type, material, bore
diameter, thickness to be cut, and the pressure of oxygen. These nozzles have extensive use in the fabrication industry, each
delivering a certain specific cut.
Types of gas cutting nozzles
Gas cutting nozzles are supplied in various types. There are three main globally recognized and frequently used nozzles. They are
supplied in different sizes, material, bore diameters, and pressure tolerance ability. This attracts a different gas cutting
nozzle price on each piece. In this section, this article sheds light on the three main gas cutting nozzles.
1. A – Type Nozzle
This type of nozzle is meant for use in a two-seat blow pipe cutting flame. It is supplied as a two piece. It is mostly used with
liquefied petroleum gas as the preheating gas. A-type is made with different bore diameter to produce a cutting of desired
thickness or width. Below is a table showing the different bore diameters and corresponding cutting thickness.
Table 1.1
Nozzle Size (Inches)Thickness to be cut (mm)Oxygen pressure (Kg/cm2)1/323-61.53/646-1931/1619-10055/64100-15063/32150-2007.57/64
200-25081/8250-30082. B – Type Nozzle
Similar to its predecessor above, B-type Nozzle is used in a two-seat pipe gas cutting flame. The nozzle consists of two parts. It
is used with liquefied petroleum gas fuel to produce the preheating flame. This type shares the same dimensional variations as A-
type in terms of size and flame width produced. Please refer to Table 1.1 above for the specific size you require.
3. PNM Nozzle
The PNM nozzle is highly appreciated for the extra safety measure it employs. It limits the mixing of gases to the 3 seat nozzle
only thereby eliminating any possible chance of a backfire or a flashback hence ensuring work safety. It is produced for use with
liquefied petroleum gas and acetylene gas fuels.
It comes in two pieces for LPG use and a single piece for acetylene use. Similar to its two counterparts discussed above, it is
available in various sizes. Table 1.1 above, clearly illustrates the sizes available in the market.