MI Heating Joints & Welding


The quality of the joint between hot and cold cables are vital to the operation and lifetime of the cable. 

There are numerous ways to manufacture this. We can supply a Laser welded joint, TIG welded joint and Silver Solder Brazed joints- all of which will work for the lifetime of a project when designed, installed and controlled properly.

Brazed Joint 

Historically Silver Solder Brazed joints, with the correct purity of silver, is the most common way to install a heating unit. We have installed applications from the 1970’s using this method which are still in operation today. Furthermore in comparison to Laser and TIG it is a more economic option for the client and can actually be modified onsite.

Welded Joint 

We also have the capability of welding joints through TIG welding or Laser welding.

When manufactured using this process, these joints will be able to survive at higher temperatures than Silver Solder Brazed joints (which have a maximum operation temperature of 600°C). Laser Welding is increasingly popular in CSP (Concentrated Solar Power) for instance. 

However, there are very few applications that require this and we would never recommend exposing a TIG welded or Laser welded joint to over 600°C regardless due to the mechanical strain it would come under. Therefore prioritising good design and installation in any Trace Heating system to avoid these temperatures is imperative.

Best Practice  

We are constantly running tests on the three joint types to understand which will be the most effective in real life working conditions. For example we must consider which joint has the greatest depth of penetration to survive ‘pull-tests’ which are a realistic examples of the stress the joints will encounter in working conditions.  

Ultimately we will look to understand the need of the client’s application and make a recommendation based on what we know is the most economic choice to survive the lifetime of a project.

Please refer the below pages for more information;

Learn more about each type of Unit in this section;

Download brochure

Interested in finding out more?