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Frequently Asked Questions
What makes it withstand high temperature?
There is no polymer anywhere in it.
A conductor sits in compacted mineral insulation.
A seamless metal sheath encloses both.
Nothing in that construction softens or ages thermally.
Other cables are limited by their jacket or core.
This one is limited by the sheath alloy.
Why can it not be cut on site?
It is a series circuit, not a parallel one.
The run's resistance sets the output.
Changing length changes the heat produced.
Cables are made to a measured length.
Cold leads are terminated at the factory.
The survey must therefore be right.
What does that mean for the survey?
It carries the accuracy burden.
Measure the actual route, including valves.
Allow for supports and pipe fittings.
Late changes cannot be absorbed on site.
A wrong length means a new cable.
Confirm before the order is placed.
Where is it the only sensible choice?
High maintain temperatures on process pipework.
Pipes that are steam cleaned periodically.
Hazardous areas requiring a metal sheath.
Locations exposed to physical damage.
Chemically aggressive environments.
Polymer cables fail in all of these.
Why are terminations the weak point?
The mineral insulation absorbs moisture readily.
An unsealed termination lets it in.
Insulation resistance then collapses.
The circuit fails, often soon after installation.
Terminations need trained installers.
Most early failures trace back to them.
How is it tested?
By insulation resistance, before and after.
Test on delivery to prove it arrived sound.
Test again after installation and lagging.
A drop indicates moisture ingress or damage.
Record both readings as a baseline.
Retest periodically through life.
How is sheath material chosen?
Against the environment, not the temperature alone.
Stainless is the common default.
Higher alloys suit corrosive service.
Chlorides are the case to check.
Buried or immersed runs need particular care.
State the surroundings when specifying.