Gas Welding Tanks and Temperature Control

Whether you refer to it as oxy-fuel welding, oxy welding, or simply gas welding, it doesn’t come without its challenges. Weather and environment create additional challenges for welders, their torches, gas welding tanks, and welding materials. Welders are pros at adapting and overcoming these challenges and over the years have developed methods for staying one step ahead of mother nature on a welding job.

Welding in cold weather conditions

When Is It Too Cold To Weld?

If you run a business and desperately need welding repairs done so you can get back to work, your answer would be “never.” If you rely upon welding to make a living, your answer would also probably be “never.” Industrial deadlines cannot always wait for warmer weather. However, precautions need to be taken to ensure human safety, equipment protection, and weld integrity. Let’s take a closer look at 1 of these cold weather welding challenges.

Effects Of Cold On Gas Welding Tanks

No matter what gas mixture you use, cold temperatures will make it difficult, and potentially impossible to weld in the dead of winter. When embarking upon a winter project, it may feel like there are many elements which are out of your control. One element that you can take control of is the temperature of your welding gas tank.

Frozen Regulators

The regulator acts as a barrier between the high pressure inside the tank and the low pressure of the ambient air. The pressure, volume, and temperature of a gas are all related. As the gas enters the regulator, its pressure decreases and so does its temperature. Even under normal temperatures, frost can develop on a gas cylinder regulator. The frost that develops during normal weather is the result of condensation. However, during the winter, regulators can become frozen both inside and out. Frozen regulators can block the flow of gas completely.

Reduced Gas Flow

When the temperature of a tank falls, so will the gas pressure within the tank. When it comes to producing clean and flawless weld joints, consistent temperature of your gas is an important matter to regulate. Whether you’re using acetylene, argon, hydrogen, propane/butane, or propylene, the answer is the same. You need to maintain an ideal temperature for a consistent extraction rate. When the temperature drops, it’s very difficult to maintain optimal pressure in a cylinder tank of any size.

Liquefaction and Separation

Cold temperatures can cause gases to liquefy and settle at the bottom of a cylinder. Cylinders with a mixture of gases are prone to partial liquefaction and uneven settling. As temperatures drop, the gases in the cylinder will liquefy, settle, and separate. When your gas quality diminishes, so do the quality of your welds.

Lower Weld Quality

You need a consistent extraction rate in order to create strong and aesthetically appealing weld joints. When the psi is low and the gas flow rate is sporadic, it causes pin holing and spattering in your weld joints. These defects are not just superficial. They can also lower the strength and integrity of your welds.

Regulated Tank Heating Benefits

Ideal tank temperatures facilitate ideal gas extraction, which in turn, offers ideal welding. Heating your tank, especially when working in cold weather, will increase the PSI considerably. Of course, you don’t want the PSI too high either, and that’s why we use the term regulated heat. Maintaining the ideal temperature will help produce the best flow rate and will prevent pin holing and spattering.

*If you are interested in learning more about different gas mixtures, visit the Compressed Gas Association (CGA) website. The CGA offers extensive training on different gases and gas mixtures including their properties, uses, and safety recommendations.

Powerblanket Gas Welding Tank Solutions

Gas Cylinder Heaters

Whether you use a small or large tank for your gas welding, we have a solution for you. Powerblanket offers a variety of gas cylinder heaters and propane tank heating solutions. Our heaters safely control the cylinder temperature for propane, argon, butane, nitrogen, oxygen and other compressed gases. In addition, they are certified to meet UL, CSA, and CE standards with options for hazardous location certifications, class I, division 2 (C1D2).

Powerblanket Gas Cylinder Heater Benefits:

  • Increase performance and efficiency of gas cylinders
  • Provide heat where you need it
  • Save money by optimizing gas and material usage
  • Safety certified to UL/CSA standards
  • Eliminate unnecessary cylinder refills in cold weather
  • Produce ideal flow rates
  • Eliminate pin holing and spattering in welding applications

Contact us to find the right cold weather welding solutions for your needs at 844.245.6604 or [email protected]

Powerblanket's superior heating solutions reduce costs by optimizing container temperatures and increasing cylinder efficiency.


Alex Pacanowsky

Meet Alex, one of our experts in freeze protection and the head of the custom team at Powerblanket! For the past several years, Alex has worked closely with oil & gas pros, medical device startups, and pharmaceutical suppliers (just to name a few) to create weatherproof operations. No matter how cold the weather, or what needs to be heated, Alex knows just what to do! He also loves mountain biking and spending time with his two boys, 5 and 9, and two Labrador Retrievers.

3 thoughts on “Gas Welding Tanks and Temperature Control

  1. We have run into issues with both, we have found more issues with Acetylene and Propylene, mainly due to their higher boiling point and the energy they require to boil. However, these blankets are a good solution for any gas related process that requires specific temperatures to maintain consistency.

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