PRODUCTS
CNG
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Supply & Distributor of Compressed Natural Gas (Treated) CNG for Oxy-Fuel Cutting, welding, Gouging, Brazing & Flame Hardening. |
WHAT IS CNG Treated Gas?
- It is an CNG Mixture for high combustion with compound of Methane, Ethane and other hydrocarbons for oxy-fuel cutting.
- It does faster and clean jobs of metal cutting, brazing, gouging and flame hardening.
- It’s stored & distributed in hard containers at 180~200 bar.
- Cost significantly less than other fuel gases.
- It is safer and it gives better cutting performance than acetylene.
Properties of CNG Treated Gas
- Appearance : Colourless Gas
- Burning temperature : >3000 °C
- Auto ignition temperature : >500 °C
- Flammable limit: LEL = 4.5% Vol
- Odour: Pungent Odour – Mercaptan mixture (added)
- Vapour Density: 0.81kg/m3 @ 760 mm Hg
- Flammable limit: UEL = 15.4% Vol
Benefits of CNG Treated Gas
- Quicker start time due to concentrated of high temperature.
- 5 – 10 % faster cutting speeds on straight cutting.
- 10 – 20 % faster cutting speeds on shape cutting.
- Extremely clean burning.
- Less carbon.
- Maximum usage up to 98 % volume of container.
Uses of CNG Treated Gas
BRAZING
- Flame is clean in such way zero porous bond produced.
- No finishing required in brazing copper to copper, using flux, as the surface of the heated metal is clean and shiny
CUTTING
- Cut steel faster than other gases.
- Less carbon slag and no weld-back due to complete oxidation, hotter flame.
- Little or no grinding required after cutting.
FLAME HARDENING
- Faster flame hardening due to high temperature, superior heat transfer properties and stability of CNG.
- Permits greater line pressure for an enlarged flame.
GOUGING
- Quality speed gouging operations.
- Less slag and weld-back free gouging process with parent metal exposed ready for welding.
Physical Properties of CNG Treated Gas vs Acetylene
DESCRIPTION |
ACETYLENE |
CNG |
| Burning Temp in Pure Oxy> 99.5% | 3148 ° C | >3000° C |
| Explosive limit in air | 2.5 % - 90 % | 4.5% - 15.4 % |
| Shock Sensitivity | Unstable | Stable |
| Auto Ignition Temp | 305 ˚C | 500 ˚C |
| Maximum allowable pressure | 15 PSI | Linear with oxygen pressure |
| Tendency of back fire | High | Low |
| Toxicity | Low | Low |
| Reactivity | Copper & Silver Alloys | Low |
| Vapour Density | >0.906 | 0.81 |