Save Money with Axenics’ Plastic Tube Welding Services

With more than 30 years of experience, Axenics offers clean and repeatable plastic tube welding services which mirror our welding capabilities for metals.

Our certified welders are capable of welding polymer-based materials including:

  • Polytetrafluoroethylene (PTFE/FPA)
  • Polyvinyl Chloride (PVC)
  • Chlorinated Polyvinyl Chloride (CPVC)
  • Polypropylene (PP)
  • High density polyethylene (HDPE)
  • Polyvinylidene fluoride (PVDF)

There aren’t many organizations with the skills necessary to bend and weld Polytetrafluoroethylene (PTFE). When performing tube welding, Axenics uses our N2S100 Nitrogen Saver, which allows us to minimize nitrogen waste, resulting in a significant cost savings for us and our customers.

The Nitrogen Saver eliminates nitrogen waste by automatically switching to compressed air when the heating torch is not being used. Additionally, Axenics tests all of our welds to ensure that the integrity and strength of the welds meet or exceed customer expectations before the final product is delivered.

Plastic tube welding is commonly used to modify valves and fittings, as well as to create custom manifolds and assemblies. Tube welding allows for the joining of two units as an alternative to the use of bulky or expensive fittings, saving time, space and money. Tube welding, when done with precision, can be used to produce strong and complex systems that meet our customers’ exacting project requirements.

Axenics welds plastic tubing using a process called hot gas welding, which also can be referred to as heat fusion or butt welding. Our thermoplastic tube welding process involves the joining of two polymer-based units using nitrogen gas and heat to create the strongest possible bond. The two plastic units to be joined are heated simultaneously and pressed together. Once the pieces have cooled, they form a permanent bond.

Plastic complex assembly

Benefits of Tube Welding with Axenics

Our highly skilled and trained welders have the ability to perform ¼-inch tube-to-tube welds. We use nitrogen gas because it allows for the cleanest and most precise welds. Axenics also uses a custom-built machine capable of repeating a simple welding process automatically to save our customers both time and money

Plastic components are frequently used in applications where metal components could corrode or decay due to the gas or liquids being transported. We see this often in the medical device, chemical manufacturing, semiconductor and life sciences industries. Companies in each of these industries face complex challenges that can be solved by plastic tube bending and welding.

Perhaps even more so than fabricating with metals, plastic manufacturing requires a high level of skill and expertise to ensure the integrity of the bends and welds. Our qualified technicians can weld and bend plastics to fit almost any shape and/or space requirements without the need for adding multiple joints and fixtures.

Plastic Tube Welding Process

There are three main steps to plastic welding:

Surface Preparation

First, the technician will check each plastic component for defects. The plastic components are often cleaned and/or abraded in order to aid in the welding process.

Welding Applications

Plastic tube welding can be performed in several ways. It is often performed with the use of heat, though it can also be done through use of a chemical solvent, depending on the type of plastics being joined. PVC, for example, is sometimes welded with the use of dichloromethane. This chemical temporarily dissolves the chemical bond in PVC, which allows the plastic component to be changed before the bond is restored.

Using heat, the plastic can be softened to make it easier to work with. Heat can be applied by using steam, hot gas, a welding rod, a laser or a hot plate. While the plastic components are soft, they are put into a vise, where pressure is applied to the pieces, causing the edges to bond together. Consistent pressure must be applied to ensure the quality and integrity of the weld.


Once the welding process is complete, the newly formed product is left to cool. Pressure may continue to be applied during the cooling process to help the product retain its shape. If pressure is not applied during cooling, the shape of the product is sometimes altered from material shrinkage.

Do you have a plastic tube welding project you need help with?

Contact the Axenics plastics division for help with your project.

Contact Us!