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What is CNG Treated Gas?
- It is a CNG Mixture for high combustion with compound of Methane, Ethane and other Hydro-carbons for Oxy-Fuel cutting which is substitute for Acetylene & LPG.
- It is more environmentally clean and safer than other Gases.
- It does faster and clean jobs of metal cutting, Brazing, Gouging and Flame Hardening.
- It stored & distributed in hard containers, at a normal pressure of 180 - 200 bar.
- Cost significantly less than other Gases.
- It gives better cutting performance than Acetylene.
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Properties of CNG Treated Gas
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| Appearance: |
Colourless Gas |
| Odour: |
Pungent Odour – Mercaptan Mixture (added) |
| Burning Temperature: |
>3000 °C |
| Auto ignition temperature: |
> 550 °C |
| Flammable Limit |
LEL = 4.5% Vol |
| Flash Point: |
184°C |
| Vapour Density |
0.80kg/m3 @ 760 mm Hg |
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Brazing
- Flame is clean in such a way zero porous bond is produced
- No finishing required in brazing copper to copper, using flux, as the surface of the heated metal is clean and shiny.
Flame Hardenting
- Faster flame hardening due to high temperature,
- Superior heat transfer properties and stability of CNG.
- Permits greater line pressure for an enlarged flame.
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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.
Gouging
- Quality speed gouging operations.
- Less slag and weld-back free gouging process with parent metal exposed ready for welding.
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Benefits of CNG Treated Gas
- Environmental friendly (No sulphur contain that such can be happened in other fuel gas)
- Much safer than other fuel Gas in the event of spill or leakage.
- Quicker start time due to concentrated of high temperature.
- Improve the efficiency of work
- 5 – 10 % faster cutting speeds on straight cutting.
- 10 – 20 % faster cutting speeds on shape cutting.
- Extremely clean burning with very less carbon (complete combustion)
- Less carbon.
- Use maximum 98% volume of container.
Physical Properties of CNG Treated Gas vs Acetylene
| Description |
Acetylene |
CNG |
| Burning Temp in Oxy |
3148°C |
>3000°C |
| Explosive Range |
3.0% ~ 93% |
5% ~ 59% |
| Explosive limit in air |
2.4% - 88% |
5.3%- 14% |
| Shock Sensitivity |
Unstable |
Stable |
| Auto Ignition Temp |
325°C |
>550°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 |
0.80 |
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A&G Industrial Gas Trading Pte Ltd |
Supplier of Industrial Gas,
Welding Equipments and Marine Chemicals and Paints.
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AG Shipping Pte Ltd |
Air & Sea Freight Forwarding Company
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PPL Marine Supply(s) Pte Ltd |
Authorized Distributor for MARICHEM MARIGASES
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