Gas is a convenient and versatile energy source that powers everything from our stoves to our braais (if that is your sort of thing).

But have you ever stopped to think about the humble gas cylinder that holds all that power?

These unassuming tanks are built with safety in mind, following a rigorous manufacturing process. As one of the best gas suppliers in Pretoria, you can be sure that you will always get the best gas cylinder possible, but it’s still nice to know how gas cylinders are made.


From Raw Material to Ready for Use, this is how the Cylinders are made

How are gas cylinders made

Because gas under pressure can be dangerous, the entire industry is well-regulated and as such all gas cylinders will generally be made in this same step-by-step way.


Step 1 – Shaping the Steel

The process starts with high-quality steel, often specially treated to resist corrosion. For seamless cylinders (high-pressure cylinders should have limited joins, as a join can be a weak point), a thick steel disc is transformed into a cylindrical shape using a powerful deep-drawing technique. Welded cylinders, used for lower-pressure gases, involve shaping steel sheets and welding them together.


Step 2 – Building the Body

Components like the valve guard ring, foot ring, and valve neck are finely made and welded to the cylinder body. This creates an extra strong structure with reinforced areas for added strength.


Step 3 – Strength Through Heat Treatment

The welded cylinder undergoes a heat treatment process. This refines the metal’s grain structure, improving its strength and resilience.


Step 4 – Testing for Perfection

Each cylinder undergoes rigorous standard industry testing to ensure it can withstand the pressure of the gas it will contain. This involves hydrostatic pressure testing, where the cylinder is filled with water and pressurised to exceed its designed working pressure.


Step 5 – Finishing Touches

After passing inspections, the cylinder is cleaned, shot-blasted for a smooth finish, and then painted with a protective coating. Finally, the valve is securely attached and undergoes further testing for leaks and functionality.


How the Manufacturing Process Protects You

The way gas cylinders are made directly contributes to their safety.

Seamless cylinders, considered the strongest, have no weak points from welds and the heat treatment strengthens the metal, making it more resistant to cracks and ruptures. Finally, the rigorous testing ensures each cylinder meets strict safety standards before reaching your home.


Why Buying From a Reputable Source Matters

With safety at the forefront, it’s important that you only purchase gas cylinders from reputable companies.

These companies adhere to strict manufacturing regulations and ensure proper maintenance of their cylinders. You should always look for clear markings on the cylinder indicating its certification and expiry date. By buying from a trusted source, you can be confident that your gas cylinder is built to last and, most importantly, it will be safe to use.

It is also important that you take the time to regularly inspect your gas cylinder for things like rust and leaks. Any imperfection in the cylinder should be enough to encourage you to replace the cylinder as soon as possible.

Need help with your gas bottle? Perhaps you are looking for a trustworthy new supplier? Contact Budget Gas today for more information.