Product FAQs

Understanding the functions and capabilities of our composite cylinders

composite tank constructionIf you’re new to composite propane cylinders, you likely have a lot of questions. We’ve assembled some of the more common ones so you can get started on learning about them, and how Viking Cylinders’ products are superior.

What is a composite propane tank?

A composite LPG cylinder / composite propane tank or Type IV LPG cylinder, consists of a fiberglass pressure vessel and an external casing. Composite cylinders are widely used for storing gas under high-and low-pressure. Composite materials have unique qualities such as light weight, superior strength, and increased durability, and they are used in multiple industrial applications.

  • The inner layer is seamless, blow-molded polyethylene (HDPE)
  • The next layer is a wound blend of fiberglass and resin.
  • The durable outer case is an HDPE casing, providing protection, an ergonomic grip and our trademark sleek design.

Aren’t all composite cylinders built the same?

Definitely not. While all composite cylinders use some type of composite material (hence the term “composite cylinders”), the product design, materials, manufacturing process and testing procedures vary significantly from one company to another. No other company makes cylinders like ours. No other company has produced the same number of composite cylinders or maintained our outstanding safety record.

Is Viking Cylinders a new business?

Viking Cylinders is the North American brand for Hexagon Ragasco’s composite propane cylinders, which have been in production since 2000. Our cylinders were previously sold in North America under the Ragasco name. Hexagon Ragasco is the world’s undisputed leader when it comes to composite propane gas cylinders, selling more than 20 million around the globe.

Why are your cylinders translucent?

The fiberglass and resin materials enable you to see the propane gas level through the wall of the cylinder so that you always know exactly how much propane you have left. This helps to eliminate any risk of running out of propane when you need it most, as well as any necessity to rely solely on your propane tank gauge or an external monitor.

Will Viking Cylinder propane tanks explode in a fire?

We have the safest track record in the industry. Boiling Liquid Expanding Vapor Explosion, or BLEVE, is when there’s more pressure inside a tank than it can handle. Our propane cylinders are BLEVE-free, even in the event of a fire. The resin burns off and the plastic liner and casing melt in a fire, allowing the propane to breathe through the cylinder wall, and instead burn in a controlled manner.

What is the life expectancy of a Viking Cylinder propane tank?

Our products are remarkably durable. Our cylinders have a 15-year service life from the date of manufacture. They require recertification at 5- and 10-year intervals. This is largely due to the materials we use, as well as the UV additives applied to the casing material to provide UV stability.

Do you have more questions about our products and services? Request more information and we’ll happily answer any questions.