Longterm Machinery Technologies are leading supplier of complete turnkey solutions for the LPG cylinder production facilities to manufacture all sizes/types of LPG gas cylinders. The whole process from blanking and body forming line, full automatic welding line, heat treatment, full automatic hydrostatic testing line, powder coating and finishing line.

Especially we have the best and automatic welding line from automatic trimming, joggling, valve bung welding, handle and bottom welding to automatic MIG body welding, the whole line involves only 7 workers, but output is 2000PCS per 8hrs.

We have been focused on cylinder welding technology since 30 years ago. During last 30 years, we keep improving our technologies on welding(TIG, MAG, MIG, SAW)and make a lot of improvement from SAW welding to MIG welding on LPG gas cylinder. Our equipment are widely used Aerospace, Petrochemical, Pressure Vessels, etc...We generated big profit by saving cost and improving welding quality on welding for our customers from all over the world, America, Russia, Turkey, Vietnam, India, Thailand, Bangladesh, South Africa, etc...

I. Production Line of LPG Gas Cylinder

Including circumferential seam welding machine

Longtitudinal seam welding machine

Hydraulic leakage test

Automatic trimming machine

Valve seat welding machine

Foot ring welding machine

Protection enclosure welding machine

End dish shaping machine

Annealing furnace

Shot blasting machine

Sandblast machine

2. Production line for Solar Water Tank

Including pressurized and non-pressurized solar water tank manufacturing line

The main equipment are as follows:

Circumferential seam welding machine

Longitudinal seam welding machine

Pipe fitting welding machine

Hole punching machine

Grooving machine

3. Production line for Steel Drum Manufacturing Line

Sheet rolling machine

Spot welding machine

Longitudinal seam welding machine

Grooving machine

Leakage testing machine

Flanging machine

Sealing machine

4. CNG Tank & Fire Extinguishier Spinning machine