MJ Gas House
Gases for welding and cutting
Match the gas to the metal and the process and your welds come out cleaner. All purity grades on request.
Argon
For TIG and aluminium.
- TIG welding stainless steel and aluminium
- MIG welding aluminium
- Thin sheet work
Mixture gases
Argon and CO₂ mix for MIG.
- MIG welding mild steel
- Cleaner bead, less spatter
- Gates, frames and structures
Carbon dioxide
Low cost MIG shielding.
- MIG welding mild steel
- Deep penetration
- Heavy fabrication
Oxygen
For cutting and heating.
- Gas cutting with your fuel gas
- Gas welding
- Heating, bending and brazing
Nitrogen
For purging and laser cutting.
- Laser cutting assist on stainless
- Purging and pressure testing
- AC and fridge lines
High purity argon
For critical work.
- Precision and critical welds
- Spectroscopy and lab use
Which gas for which job
A quick guide to the gases Lahore workshops use most, process by process.
TIG welding
Stainless steel, aluminium and thin sheet. Pure argon shields the tungsten and the weld pool from air. Typical flow is around 8 to 12 litres per minute at the torch.
MIG welding
Mild steel gates, frames, chassis and structures. An argon and CO₂ mix gives a cleaner bead with less spatter. Pure CO₂ costs less and digs deeper. Flow is usually 12 to 18 litres per minute.
Gas cutting and heating
Oxygen with your fuel gas cuts thick plate, scrap and girders, and heats parts for bending or brazing.
Laser and plasma cutting
Nitrogen as an assist gas gives clean, oxide free edges on stainless steel. Oxygen is used for cutting mild steel.
Pipelines, AC and pressure testing
Nitrogen is dry and does not burn, so it is used to purge and pressure test pipes, AC and fridge lines before they go into service.
Welding gas chart
| Metal or job | Process | Gas |
|---|---|---|
| Stainless steel | TIG | Argon |
| Aluminium | TIG or MIG | Argon |
| Mild steel | MIG | Argon and CO₂ mix |
| Mild steel, heavy work | MIG | CO₂ |
| Thick plate, scrap | Gas cutting | Oxygen with fuel gas |
| Stainless, laser cut | Laser cutting | Nitrogen |
| Pipes, AC lines | Purging and testing | Nitrogen |
A general guide. Send us your metal and job, and we will confirm the right gas.
How we work with workshops
Fifteen years of supplying Lahore workshops and factories.
Who we supply
We deliver to workshops and factories across Lahore, and to other cities in Pakistan.
Safe handling
Set the flow right
Too much argon wastes gas and pulls air into the weld. Stick to the flow for your process.
Check for leaks
Brush soapy water on hoses and fittings. A small leak can drain a cylinder overnight.
Keep oxygen fittings clean
No oil or grease on oxygen valves and regulators, ever.
Chain it and close it
Keep cylinders upright and chained, away from sparks, and close the valve at the end of the day.
Frequently asked questions
Which gas do I need for TIG welding?
Pure argon. It works for stainless steel, aluminium and most other metals. High purity argon is available for critical work.
Argon or argon CO₂ mix for MIG welding?
For mild steel, an argon and CO₂ mix gives a cleaner weld with less spatter. For aluminium, use pure argon.
Can I use pure CO₂ for MIG welding?
Yes, on mild steel. It costs less and penetrates deeper, but gives more spatter than a mix.
Do you sell welding regulators?
Yes. We stock argon flowmeter regulators and single and two stage regulators, matched to your gas.
Can I get my argon cylinder refilled?
Yes. Bring it to our unit, or we can collect it with your next delivery.
Do you deliver to factories and workshops?
Yes. We deliver to workshops and factories across Lahore, and to other cities in Pakistan.
