FAQs
PipeFreezing FAQs
What contents can be frozen using the pipefreezing process?
Water, and most water-based liquids can be frozen. Systems containing glycol, which lowers the freezing temperature, can in most cases be frozen successfully. The freezing time, though, is usually extended, and liquid nitrogen consumption increased. Liquids such as light to heavy fuel oils and diesel can be frozen, but within limitations.
What pipe materials does the pipefreezing process cover?
Most ferrous and non-ferrous pipes can be frozen with no ill effects, provided the necessary precautions are taken. Ferrous materials become brittle at very low temperatures, and therefore mechanical shocks should be avoided. There is a considerable range of non-metal pipes with very different characteristics, which would be impossible to categorise here. We would request that such enquiries be directed to our technical department, where each application can be looked at on its own merits.
How does pipefreezing work?
Pipefreezing is carried out by encapsulating a short section of pipe with a vented box or jacket, then introducing a coolant to the annulus between the pipe and the jacket. The coolant is supplied continuously to the jacket until the pipe contents freeze. The coolant is then fed at a reduced rate to ensure the integrity of the ice plug.
Can you freeze flowing water?
Flowing liquids will normally negate the formation of a freeze, although a small trickle, such as a dripping flange or passing valve can usually be dealt with.
Will the pipe crack or burst when it freezes?
Provided the normal precautions are taken and the pipeline to be frozen is in good condition, the likelihood of the pipe cracking or bursting is remote.
Can you freeze hot water (liquids)?
The simple answer is NO! However, the smaller the diameter of the pipe, the hotter we can commence the freeze. On large pipes, given time, we can usually cool the water/liquid in a short section of pipe to a temperature low enough to commence freezing. We would ask that such enquiries be directed to our sales or technical department, where the application can be assessed and a working plan devised.
